/*27/7/2013 version  0.01
"Inspired" by FLY program: http://martin.gleeson.com/fly
*********************************************************************************
* J.M. Evers 7/2013								*
* This is all just amateur scriblings... So no copyrights.			*
* This source code file, and compiled objects derived from it,			*
* can be used and distributed without restriction, including for commercial use	*
* No warrenty whatsoever							*
*********************************************************************************
*/
#define VERSION		"0.5"

#define _GNU_SOURCE
#include <string.h>

#include "canvasdraw.h"
void *tmp_buffer;
FILE	*js_include_file;
/******************************************************************************
**  Internal Functions
******************************************************************************/
void	add_to_buffer(char *tmp); /* add tmp_buffer to the buffer */
void	sync_input(FILE *infile);/* proceed with inputfile */
void	reset();/* reset some global variables like "use_filled", "use_dashed" */
int	get_token(FILE *infile); /* read next char until EOL*/
/*
int 	x2px(double x);
int 	y2px(double y);
*/
double 	px2x(int x);
double 	px2y(int y);
double	get_real(FILE *infile,int last); /* read a value; calculation and symbols allowed */
char    *str_replace ( const char *word, const char *sub_word, const char *rep_word );
char 	*get_color(FILE *infile,int last); /* read hex-color or colorname -> hex */
char	*get_string(FILE *infile,int last); /* get the string at the end of a command */
char	*get_string_argument(FILE *infile,int last); /* the same, but with "comma" as  separator */
char 	*convert_hex2rgb(char *hexcolor);
void	make_js_include(int canvas_root_id);
void	check_string_length(int length);/* checks if the length of string argument of command is correct */
FILE 	*js_include_file;
FILE	*get_file(int *line_number, char **filename);
FILE 	*infile;    /* will be stdin */
/******************************************************************************
** global
******************************************************************************/
int finished = FALSE;/* main variable for signalling the end of the fly-script ; if finished = 1 ; write to stdout or canvasz */
int line_number = 1;/* used in canvas_error() ; keep track of line number in canvasdraw/fly - script */
/* set some variables to avoid trouble (NaN) in case of syntax and other usage errors */
int xsize = 320;
int ysize = 320;
double xmin = 0.0;
double xmax = 320.0;
double ymin = 0.0;
double ymax = 320.0;
double tmax = 0;
double tmin = 0;
/* flag to indicate parsing of line status */
int done = FALSE;
int type; /* eg command number */
int onclick = 0;
/*
0 = noninteractive ;
1 = onclick ;
2 = draggable ;
3 = click+slideable ;
4 = slideable without click
5 = draggable + slideable
*/
char *slider_type="0";
char *my_sliders = "[-1]";
int use_slider = -1;
int last_slider = 0;
double double_data[MAX_INT+1];
int int_data[MAX_INT+1];
int dragstuff[MAX_DRAGSTUFF];
int js_function[MAX_JS_FUNCTIONS]; /* javascript functions include objects on demand basis: only once per object type */
double affine_matrix[] = {1,0,0,1,0,0};
int use_affine = FALSE;
int use_rotate = FALSE;
int use_filled = 0; /* 0:no fill, 1:fill,2=grid?,3=hatch?,4=diamond?,5=dot?,6=image? */
int use_dashed = FALSE; /* dashing not natively supported in firefox, for now... */
double angle = 0.0;
char buffer[MAX_BUFFER];/* contains js-functions with arguments ... all other basic code is directly printed into js-include file */
char *getfile_cmd = "";
int reply_format = 0;
unsigned int canvas_root_id;
char *css_class;
int font_size;
char *draw_type;
int jsplot_cnt = -1;     /* keepint track on the curve identity */
int input_cnt = 0;
int dashtype[2] = { 4 , 4 }; /* just line_px and space_px: may have more arguments...if needed in future */
char *function_label = "[\"f(x)=\",\"g(x)=\",\"h(x)=\"]";
int drag_type = -1;/* 0,1,2: xy,x,y */
int use_offset = 0;/* use_offset only for text shape objects... 0=none;1=yoffset;2=xoffset;3=xyoffset;4=centered*/
int linegraph_cnt = 0; /* identifier for command 'linegraph' ; multiple line graphs may be plotted in a single plot*/
int barchart_cnt = 0; /* identifier for command 'barchart' ; multiple charts may be plotted in a single plot*/
int legend_cnt = -1; /* to allow multiple legends to be used, for multiple piecharts etc  */
int use_axis = FALSE;
int use_axis_numbering = -1;
int no_reset = FALSE;

/******************************************************************************
** Main Program
******************************************************************************/
int main(int argc, char *argv[]){
    /* need unique id for every call to canvasdraw: rand(); is too slow...will result in many identical id's */
    struct timeval tv;struct timezone tz;gettimeofday(&tv, &tz);
    canvas_root_id = (unsigned int) tv.tv_usec;
    infile = stdin;/* read flyscript via stdin */
    int i,c;
    for(i=0;i<MAX_DRAGSTUFF;i++){dragstuff[i] = 0;}
    for(i=0;i<MAX_INT;i++){int_data[i]=0;double_data[i]=0;}
    int use_snap = 0; /* 0 = none 1=grid: 2=x-grid: 3=y-grid: 4=snap to points */
    int print_drag_params_only_once = FALSE;/* avoid multiple useless identical lines about javascript precision and use_dragdrop */
    int line_width = 1;
    int decimals = 2;
    int use_dragstuff = 0;
    int precision = 100; /* 10 = 1;100=2;1000=3 decimal display for mouse coordinates or grid coordinate.May be redefined before every object */
    int use_userdraw = 0; /* 0=none,1=userdraw,2=multidraw flag to indicate user interaction */
    int use_tooltip = -1; /* 1= tooltip 2= popup window*/
    int use_parametric = FALSE;/* will be reset after parametric plotting */
    char *tooltip_text = "Click here";
    char *temp = ""; /* */
    char *bgcolor = "";/* used for background of canvas_div ; default is tranparent */
    char *stroke_color = "255,0,0";
    char *fill_color = "255,255,255";
    char *font_family = "12px Arial"; /* commands xaxistext,yaxistext,legend,text/textup/string/stringup may us this */
    char *font_color = "#00000";
    draw_type = "points";
    char *fly_font = "normal";
    css_class = "none";
    char *flytext = "";
    int canvas_type = DRAG_CANVAS; /* to use a specific canvas  for filling etc */
    int pixelsize = 1;
    int fill_cnt = 0;
    int use_zoom = 0;
    font_size = 12;/* this may lead to problems when using something like <code>fontfamily Italic 24px Arial</code> the ''fontsize`` value is not substituted into fontfamily !! */
    int fly_font_size = 12; /*fly_font_size is relative to this... */
    for(i=0;i<MAX_JS_FUNCTIONS;i++){js_function[i]=0;}
    int arrow_head = 8; /* size in px needed for arrow based  userdraw:  "userdraw arrow,color" */
    int crosshair_size = 5; /* size in px*/
    int plot_steps = 250;/* the js-arrays with x_data_points and y_data_points will have size 250 each: use with care !!! use jscurve when precise plots are required  */
    int found_size_command = 0; /* 1 = found size ; 2 = found xrange; 3 = found yrange: just to flag an error message */
    int object_cnt = 0; /*counter to identify the "onclick" ojects ; 0 is first object set onclick: reply[object_cnt]=1 when clicked ; otherwise reply[object_cnt]=0 ; object_cnt is only increased when another object is set  again */
    int clock_cnt = 0; /* counts the amount of clocks used -> unique object clock%d */
    int boxplot_cnt = 0;
    int drawxml_cnt = 0;
    int numberline_cnt = 0;
    int snap_to_points_cnt = 0;
    int reply_precision = 100; /* used for precision of student answers / drawings */
    char *rotation_center = "null";/* needs to be removed... but is used for canvas CTX based rotation*/
    double rotationcenter[] = {0,0}; /* use for recalculating x/y values on rotation() */
    int use_animate = 0; /* used for jscurve / js parametric  */
    int use_input_xy = 0; /* 1= input fields 2= textarea 3=calc y value*/
    size_t string_length = 0; /* measure the size of the user input fly-string */
    double stroke_opacity = 0.8; /* use some opacity as default */
    double fill_opacity = 0.5;/* use some opacity as default */
    char *URL = "http://localhost/images";
    memset(buffer,'\0',MAX_BUFFER);
    void *tmp_buffer = "";
    /* default writing a unzipped js-include file into wims getfile directory */
    char *w_wims_session = getenv("w_wims_session");
    if(  w_wims_session == NULL || *w_wims_session == 0 ){canvas_error("Hmmm, your wims environment does not exist...\nCanvasdraw should be used within wims.");}
    int L0=strlen(w_wims_session) + 21;
    char *getfile_dir = my_newmem(L0); /* create memory to fit string precisely */
    snprintf(getfile_dir,L0, "../sessions/%s/getfile",w_wims_session);/* string will fit precisely  */
    mode_t process_mask = umask(0); /* check if file exists */
    int result = mkdir(getfile_dir, S_IRWXU | S_IRWXG | S_IRWXO);
    if( result == 0 || errno == EEXIST ){
     umask(process_mask); /* be sure to set correct permission */
     char *w_session = getenv("w_session");
     int L1 = (int) (strlen(w_session)) + find_number_of_digits(canvas_root_id) + 48;
     getfile_cmd = my_newmem(L1); /* create memory to fit string precisely */
     snprintf(getfile_cmd,L1,"wims.cgi?session=%s&cmd=getfile&special_parm=%d.js",w_session,canvas_root_id);/* extension ".gz" is MANDATORY for webserver */
    /* write the include tag to html page:<script src="wims.cgi?session=%s&cmd=getfile&special_parm=11223344_js"></script> */
    /* now write file into getfile dir*/
    char *w_wims_home = getenv("w_wims_home"); /* "/home/users/wims": we need absolute path for location */
    int L2 = (int) (strlen(w_wims_home)) + (int) (strlen(w_wims_session)) + find_number_of_digits(canvas_root_id) + 23;
    char *location = my_newmem(L2); /* create memory to fit string precisely */
    snprintf(location,L2,"%s/sessions/%s/getfile/%d.js",w_wims_home,w_wims_session,canvas_root_id);/*absolute path */
    js_include_file = fopen(location,"w");/* open the file location for writing */
    /* check on opening...if nogood: mount readonly? disk full? permissions not set correctly? */
    if(js_include_file == NULL){ canvas_error("SHOULD NOT HAPPEN: could not write to javascript include file...check your system logfiles !" );}

/* ----------------------------------------------------- */

/* while more lines to process */

    while(!finished){
	if(line_number>1 && found_size_command == 0 && use_tooltip != 2 ){canvas_error("command \"size xsize,ysize\" needs to come first ! ");}
	type = get_token(infile);
	done = FALSE;
	/*
	@ canvasdraw
	@ Canvasdraw will try use the same basic syntax structure as flydraw
	@ General syntax <ul><li>The transparency of all objects can be controlled by command <a href="#opacity">opacity [0-255],[0,255]</a></li><li>line width of any object can be controlled by command <a href="#linewidth">linewidth int</a></li><li>any may be dashed by using keyword <a href="#dashed">dashed</a> before the object command.<br> the dashing type can be controled by command <a href="#dashtype">dashtype int,int</a>please note: dashing may have different spacing depending on the angle of the line<br>see https://wimsedu.info/?topic=dashed-arrows-not-dashed-in-canvasdraw</li><li>a fillable object can be set fillable by starting the object command with an ''f`` (like ''frect``,''fcircle``,''ftriangle`` ...) or by using the keyword <a href="#filled">filled</a> before the object command.<br>The fill colour of ''non_userdraw`` objects will be the stroke colour...(flydraw harmonization 19/10/2013)<br>    non-solid filling (grid,hatch,diamond,dot,text) is provided using command <a href="#fillpattern">fillpattern a_pattern</a><br>note: do not use a <b>f</b> with this non-solid pattern filling !<br>for <a href="#filltoborder">filltoborder x0,y0,color</a> or <a href="#filltoborder">fill x0,y0,color</a> type filling (eg fill a region around x0,y0 with color until a border is encountered),<br>there are non-solid pattern fill analogues:<ul><li><a href="#gridfill">gridfill x,y,dx,dy,color</a></li><li><a href="#hatchfill">hatchfill x,y,dx,dy,color</a></li><li><a href="#diamondfill">diamondfill x,y,dx,dy,color</a></li><li><a href="#dotfill">dotfill x,y,dx,dy,color</a></li><li><a href="#textfill">textfill x,y,color,sometext_or_char</a></li></ul></li><li>all draggable objects may have a <a href="#slider">slider</a> for translation / rotation; several objects may be translated / rotated by a single slider</li> <li> a draggable object can be set draggable by a preceding command <a href="#drag">drag x/y/xy</a><br>The translation can be read by javascript:read_dragdrop();The replyformat is: object_number : x-orig : y-orig : x-drag : y-drag<br>The x-orig/y-orig will be returned in maximum precision (javascript float)...<br>the x-drag/y-drag will be returned in defined ''precision`` number of decimals<br>Multiple objects may be set draggable / clickable (no limit)<br>not all flydraw objects may be dragged / clicked<br>Only draggable / clickable objects will be scaled on <a href="#zoom">zoom</a> and will be translated in case of panning.</li><li> a ''onclick object`` can be set ''clickable`` by the preceding keyword <a href="#onclick">onclick</a><br>not all flydraw objects can be set clickable</li><li><b>remarks using a '';`` as command separator</b>. Commands with only numeric or colour arguments may be using a '';`` as command separator (instead of a new line). Commands with a string argument may not use a '';`` as command separator !<br>these exceptions are not really straight forward... so keep this in mind.</li><li>almost every <a href="#userdraw">userdraw object,color</a> or <a href="#multidraw">multidraw</a> command ''family`` may be combined with keywords <a href="#snaptogrid">"snaptogrid | xsnaptogrid | ysnaptogrid | snaptofunction</a> or command <code>snaptopoints x1,y1,x2,y2,...</code></li><li>every draggable | onclick object may be combined with keywords <a href="#snaptogrid">snaptogrid | xsnaptogrid | ysnaptogrid | snaptofunction</a> or command <code>snaptopoints x1,y1,x2,y2,...</code></li><li>almost every command for a single object has a multiple objects counterpart:<br><ul>general syntax rule:<li><code>object x1,y1,...,color</code></li><li><code>objects color,x1,y1,...</code></li></ul><li>All inputfields or textareas generated, can be styled individually using command <a href="#css">css some_css</a><br/>the fontsize used for labeling these elements can be controlled by command <a href="#fontsize">fontsize int</a> <br>command <code>fontfamily</code> is <b>not</b> active for these elements</li></ul>
	@ If needed multiple interactive scripts (*) may be used in a single webpage.<br>A function <code>read_canvas()</code> and / or <code>read_dragdrop()</code> can read all interactive userdata from these images.<br>The global array <code>canvas_scripts</code>will contain all unique random "canvas_root_id" of the included scripts.<br>The included local javascript "read" functions ''read_canvas%d()`` and ''read_dragdrop%d()`` will have this ''%d = canvas_root_id``<br>e.g. canvas_scripts[0] will be the random id of the first script in the page and will thus provide a function<br><code>fun = eval("read_canvas"+canvas_scripts[0])</code> to read user based drawings / inputfield in this first image.<br>The read_dragdrop is analogue.<br>If the default reply formatting is not suitable, use command <a href='#replyformat'>replyformat</a> to format the replies for an individual canvas script,<br>To read all user interactions from all included canvas scripts, use something like:<br><code>function read_all_canvas_images(){<br>&nbsp;var script_len = canvas_scripts.length;<br>&nbsp;var draw_reply = "";<br>&nbsp;var found_result = false;<br>&nbsp;for(var p = 0 ; p < script_len ; p++){<br>&nbsp;&nbsp;var fun = eval("read_canvas"+canvas_scripts[p]);<br>&nbsp;&nbsp;if( typeof fun === 'function'){<br>&nbsp;&nbsp;&nbsp;var result = fun();<br>&nbsp;&nbsp;&nbsp;if( result&nbsp;&nbsp;&& result.length != 0){<br>&nbsp;&nbsp;&nbsp;&nbsp;if(script_len == 1 ){.return result;};<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;found_result = true;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;draw_reply = draw_reply + result + "newline";<br>&nbsp;&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;&nbsp;};<br>&nbsp;&nbsp;};<br>&nbsp;if( found_result ){return draw_reply;}else{return null;};<br>};</code> <br>(*) Note: the speed advantage over <em>canvas-do-it-all</em> libraries is reduced to zero, when multiple canvasdraw scripts are present in a single page...<br>For example a typical canvasdraw script is between 5 and 40 kB...a large library like JSXgraph is approx 600 kB<br>In these cases it would be much faster to load a static general HTML5 canvas javascript draw library and parse it multiple raw fly instructions !<br>
  @ Canvasdraw can be used to paint a html5 bitmap image<br>by generating a tailor-made javascript include file: providing only the js-functionality needed to perform the job.<br>thus ensuring a minimal strain on the client browser <br>(unlike some popular ''canvas-do-it-all`` libraries, who have proven to be not suitable for low-end computers found in schools...)
	@ You can check the javascript reply format in the wims tool <a href="http://localhost/wims/wims.cgi?lang=en&module=tool/directexec">direct exec</a>
	@ For usage within OEF (without anstype ''draw``), something like this (a popup function plotter) will work:<br><code>\\text{popup_grapher=wims(exec canvasdraw <br>popup<br>size 400,400<br>xrange -10,10<br>yrange -10,10<br>axis<br>axisnumbering<br>opacity 100,100<br>grid 2,2,grey,2,2,6,black<br>snaptogrid<br>linewidth 2<br>jsplot red,5*sin(1/x)<br>strokecolor green<br>functionlabel f(x)=<br>userinput function<br>mouse blue,22<br>)<br>}<br>\\statement{<br>\\popup_grapher<br>}</code>.
	@ Be aware that older browsers will probably not work correctly<br>no effort has been undertaken to add glue code for older browsers !! <br>in any case it is not wise to use older browsers...not just for canvasdraw.
	@ Be aware that combining several different objects and interactivity may lead to problems.
	@ If you find flaws, errors or other incompatibilities -not those mentioned in this document- send <a href='mailto:jm.evers-at-schaersvoorde.nl'>me</a> an email with screenshots and the generated javascript include file.
	@ There is limited support for touch devices: touchstart, touchmove and touchend in commands <a href="#userdraw">userdraw primitives </a>, <a href="#multidraw">multidraw primitives </a>, <a href="#protractor">protractor</a>, <a href="#ruler">ruler</a> and probably a few others... <br>Only single finger gestures are supported (for now).<br>The use of a special pen is advised for interactive drawing on touch devices.<br>For more accurate user-interaction (numeric, eg keyboard driven drawings) with canvasdraw on touch devices: use the command family <a href="#userinput_xy">userinput</a>.
	*/
	switch(type){
	case END:finished = 1;done = TRUE;break;
	case 0:sync_input(infile);break;
	case AFFINE:
	/*
	 @ affine a,b,c,d,tx,ty
	 @ defines a transformation matrix for subsequent objects
	 @ use keyword <a href='#killaffine'>killaffine</a> to end the transformation...the next objects will be drawn in the original x/y-range
	 @ a: Scales the drawings horizontally
	 @ b: Skews the drawings horizontally
	 @ c: Skews the drawings vertically
	 @ d: Scales the drawings vertically
	 @ tx: Moves the drawings horizontally in xrange coordinate system
	 @ ty: Moves the drawings vertically in yrange coordinate system
	 @ the data precision may be set by preceding command ''precision int``
	 @ <b>note</b>: not all affine operations on canvasdraw objects will be identical to flydraw's behaviour. Make sure to check !
	 @%affine%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%#use larger linewith to improve selecting a draggable object !%linewidth 4%drag xy%frect 0,5,3,3,red%affine cos(pi/4),sin(pi/4),-cos(pi/2),sin(pi/2),-5,-5%drag xy%frect 0,5,3,3,red
	 @%affine+latex%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%strokecolor blue%fontfamily 42px Arial%centered%drag xy%latex 5,5,\\frac{123}{\\pi^{234}}%affine cos(pi/4),sin(pi/4),-cos(pi/2),sin(pi/2),-5,-5%drag xy%latex 5,5,\\frac{123}{\\pi^{234}}
	*/
	    for(i = 0 ; i<6;i++){
		switch(i){
		    case 0: affine_matrix[0] = get_real(infile,0);break;
		    case 1: affine_matrix[1] = get_real(infile,0);break;
		    case 2: affine_matrix[2] = get_real(infile,0);break;
		    case 3: affine_matrix[3] = get_real(infile,0);break;
		    case 4: affine_matrix[4] = get_real(infile,0);break;
		    case 5: affine_matrix[5] = get_real(infile,1);
			use_affine = TRUE;
			break;
		    default: break;
		}
	    }
	break;
        case ALLOW_DUPLICATES:
        /*
         @ duplicates || allowdups
         @ keyword (no arguments)
         @ only useful in case of a <a href="#multidraw">multidraw</a> student reply.
         @ only useful in default <a href="#replyformat">replyformat</a> (eg in case of a not specified replyformat).
         @ if set, duplicate (x:y) coordinates will not be removed from the student reply.
         @ technical: a javascript variable "allow_duplicate_answer = 1;" is declared.
         @ default for command multidraw is: removal of duplicates.
        */
        fprintf(js_include_file,"var allow_duplicate_answers = 1;");
        break;
	case ANGLE:
	/*
	 @ angle xc,yc,width,start_angle,end_angle,color
	 @ width is in x-range
	 @ angles are in degrees
	 @ not compatible with ''flydraw``
	 @ will zoom in/out
	 @ may be set onclick or drag&amp;drop
	 @ if angle size is controlled by command <a href='#slider'>slider</a>, use radians to set limits of slider
	 @ ''angle`` and <a href="#arc">arc</a>  are exceptions in case of sliders...they are always active (e.g. not click-activated)
	 @%angle%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%angle 0,0,4,10,135,blue
	 @%angle_slider%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%strokecolor blue%slider -2*pi,2*pi,260,28,angle active degree,blue arrow%arrow 0,0,8,0,8,blue%fillpattern diamond%angle 0,0,2,0,0,blue%killslider%strokecolor red%slider -2*pi,2*pi,260,28,angle active radian,red arrow%arrow 0,1,8,1,8,red%fillpattern dot%angle 0,1,2,0,0,red
	*/
	    for(i=0;i<7;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(2,2);}
		    break; /* y-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* width x-range ! */
		    case 3:double_data[3] = 0.0174532925*(get_real(infile,0) - angle);break; /* start angle in degrees -> radians  */
		    case 4:double_data[4] = 0.0174532925*(get_real(infile,0) - angle);break; /* end angle in degrees -> radians */
		    case 5:stroke_color = get_color(infile,1);/* name or hex color */
			if( use_slider != -1 ){ onclick = 3; }/* always active in case of slider */
			decimals = find_number_of_digits(precision);
    			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,17,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    			snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,17,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);
    			dragstuff[17] = 1;
    			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
    			if(onclick != 0){object_cnt++;}/* object_cnt++;*/
	            break;
		}
	    }
	    break;

	case ANIMATE:
	/*
	 @ animate
	 @ keyword
	 @ if set, it will animate a point on a curve
	 @ all other canvas object or group of objects (like lines,circles,rects,points...images,svg,latex,mathml etc)<br>may be animated using command <a href='#slider'>slider</a> with keyword 'anim'
	 @ the animated point is a filled rectangle ; adjust colour with command <code>fillcolor colorname/hexnumber</code>
	 @ use linewidth to adjust size of the points
	 @ will animate a point on -only- the next <a href='#jsplot'>jsplot/jscurve command</a>. Only a single call to <code>animate</code> is allowed...in case of multiple <code>animate</code> keywords, only the last one is valid
	 @ only usable in combination with command <a href='#jsplot'>jsplot</a> (normal functions or parametric)
	 @ moves repeatedly from <a href='#xrange'>xmin to xmax</a> or in case of a parametric function from <a href='#trange'>tmin to tmax</a>
	 @ use commands <a href='#multilinewidth'>multilinewidth</a>, <a href='#multistrokecolor'>multistrokecolor</a> etc in case of multiple animated functions.<br>use multiple functions as argument in a single call to <a href='#jsplot'>jsplot color,fun1,fun2,fun3...fun_n</a>
	 @%animate_1%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%fillcolor red%animate%trange -2*pi,2*pi%linewidth 1%opacity 255,50%canvastype 100%fill 1.2,1.2,red%canvastype 101%fill -1.2,-1.2,blue%jsplot blue,7*cos(x),5*sin(2*x)
	 @%animate_2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%fillcolor red%animate%trange -2*pi,2*pi%linewidth 1%opacity 255,50%canvastype 100%fill 1.2,1.2,red%canvastype 101%fill -1.2,-1.2,blue%multistrokecolors blue,blue,green,green,orange,orange%multilinewidth 2,2,3,3,1,1%jsplot blue,7*cos(x),5*sin(2*x),9*sin(x),5*cos(x),x^2,x
	*/
	    use_animate++;
	    if( use_animate == 1 ){
	    fprintf(js_include_file,"\nvar trace_canvas  = create_canvas%d(%d,xsize,ysize);\
	    var trace_ctx = trace_canvas.getContext('2d');\
	    trace_ctx.fillStyle = 'rgba(%s,%f)';\
	    trace_ctx.strokeStyle = 'rgba(%s,%f)';\
	    trace_ctx.lineWidth = %d;var anim_pos = 0;\n\
	    function animate_this(){\
	     var sync;\
	     var synchrone = Math.floor(animation_steps/animation_funs);\
	     trace_ctx.clearRect(0,0,xsize,ysize);\
	     for(var p=0; p<animation_funs;p++){\
	      sync = p*synchrone;\
	      trace_ctx.fillRect(x_anim_points[sync+anim_pos]-%d, y_anim_points[sync+anim_pos]-%d,%d,%d);\
	     };\
	     setTimeout(function(){\
	      requestAnimationFrame(animate_this);  anim_pos++;}, 50\
	     );\
	     if(anim_pos >= animation_steps){anim_pos = 0;};\
	     };",canvas_root_id,ANIMATE_CANVAS,fill_color,fill_opacity,stroke_color,stroke_opacity,line_width,line_width,line_width,2*line_width,2*line_width);
	    }
	    else
	    {
		canvas_error("animate can only be used once<br>multiple curves may be animated using something like:<br>jsplot red,sin(x),cos(x),x^2,sin(2*x)");
	    }
	    break;

	case ARC:
	/*
	 @ arc xc,yc,x-width,y-height,start_angle,end_angle,color
	 @ may be set ''onclick`` or ''drag xy``
	 @ compatible with ''flydraw``
	 @ attention: width &amp; height in x/y-range
	 @ for arrow hats on an arc, see  command <a href='#arcarrow'>arcarrow or arrowarc</a>
	 @ better use command <a href='#angle'>angle</a> for use with a <a href='#slider'>slider</a>
	 @%arc%size 400,400%xrange -10,10%yrange -10,10%arc 0,0,4,4,10,135,red
	 @%arc_filled%size 400,400%xrange -10,10%yrange -10,10%opacity 255,60%filled%fillcolor green%arc 0,0,4,4,10,135,red
	*/
	    for(i=0;i<7;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
	    	    if(use_affine == TRUE ){ transform(4,2);}
		    break; /* y-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* width x-range no pixels ! */
		    case 3:double_data[3] = get_real(infile,0);
		    break; /* height y-range no pixels ! */
		    case 4:double_data[4] = get_real(infile,0) - angle ;break; /* start angle in degrees */
		    case 5:double_data[5] = get_real(infile,0) - angle;break; /* end angle in degrees */
		    case 6:stroke_color = get_color(infile,1);/* name or hex color */
		    /* in Shape library:
			x[0] = x[1] = xc = double_data[0]
			y[0] = y[1] = yc = double_data[1]
			w[0] = width = double_data[2]
			w[1] = height = double_data[3]
			h[0] = start_angle = double_data[4]
			h[1] = end_angle = double_data[5]
		    */
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
    			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,12,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);reset();
    			dragstuff[12] = 1;
    			if(onclick != 0){object_cnt++;}
    			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	            break;
		}
	    }
	    break;
	case ARCARROW:
	/*
	 @ arrowarc xc,yc,x-width,y-height,start_angle,end_angle,color,type
	 @ alternative: arcarrow
	 @ uses same syntax as <a href='#arc'>arc</a>
	 @ for arrow hat: type = 1 : right<br>type = 2 : left<br>type = 3 : left&amp;right
	 @ if the default arrow hat/head is not satisfactory , the size of the arrow may be set with command <a href='#arrowhead'>arrowhead</a>
	 @ no other arrow types are implemented...yet
	 @ may be set draggable or onclick
	 @ attention: when width ad height are very different, the arrow hat is not drawn correctly. This is a flaw and not a feature...(for now: too much calculations to correct)
	 @%arcarrow%size 400,400%xrange -10,10%yrange -10,10%noreset%onclick%arcarrow 0,0,7,7,50,275,blue,3%arcarrow 0,0,8,8,50,275,red,2%arcarrow 0,0,9,9,50,275,green,1
	*/
	    for(i=0;i<8;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
	    	    if(use_affine == TRUE ){ transform(4,2);}
		    break; /* y-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* width x-range no pixels ! */
		    case 3:double_data[3] = get_real(infile,0);
		    break; /* height y-range no pixels ! */
		    case 4:double_data[4] = get_real(infile,0) - angle ;break; /* start angle in degrees */
		    case 5:double_data[5] = get_real(infile,0) - angle;break; /* end angle in degrees */
		    case 6:stroke_color = get_color(infile,0);/* name or hex color */
	            break;
	            case 7:int_data[0] = (int) get_real(infile,1);
	                switch(int_data[0]){
	                 case 1: int_data[1] = 24;break; /* right */
	                 case 2: int_data[1] = 25;break; /* left */
	                 case 3: int_data[1] = 26;break; /* left&right */
	                 default:int_data[1] = 24;break;
	                }
	        	if(int_data[0] == 1 ){int_data[1] = 24;}
	            	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
    			string_length = 1 + snprintf(NULL,0,"var arrow_head = %d;dragstuff.addShape(new Shape(%d,%d,%d,%d,%d,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",arrow_head,drag_type,object_cnt,onclick,use_snap,int_data[1],decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    			snprintf(tmp_buffer,string_length,"var arrow_head = %d;dragstuff.addShape(new Shape(%d,%d,%d,%d,%d,[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],[%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",arrow_head,drag_type,object_cnt,onclick,use_snap,int_data[1],decimals,double_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);
    			dragstuff[int_data[1]] = 1;
    			if(onclick != 0){object_cnt++;}
    			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
    			js_function[JS_ARROWHEAD] = 1;
    			reset();
		}
	    }
	    break;
	case ARROW:
	/*
	@ arrow x1,y1,x2,y2,h,color
	@ alternative: vector
	@ draw a single headed arrow / vector from (x1:y1) to (x2:y2)<br>with arrowhead size h in px and in color ''color``
	@ use command <code>linewidth int</code> to adjust thickness of the arrow
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%arrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%arrow 0,0,4,3,8,blue%drag xy%arrow 0,0,-4,3,8,green%drag xy%arrow 0,0,4,-3,8,orange%drag xy%arrow 0,0,-4,-3,8,cyan
	@%arrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%arrow 0,0,4,4,8,blue%onclick%arrow 0,0,-4,5,8,green%onclick%arrow 0,0,4,-6,8,orange%onclick%arrow 0,0,-4,-2,8,cyan
	*/
    	    for(i=0;i<6;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: double_data[2] = get_real(infile,0);break; /* x */
    		    case 3: double_data[3] = get_real(infile,0);break; /* y */
    		    case 4: arrow_head = (int) get_real(infile,0);break;/* h */
    		    case 5: stroke_color = get_color(infile,1);/* name or hex color */
	    		    if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
	    		    if(use_affine == TRUE ){ transform(4,2);}
			    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			    decimals = find_number_of_digits(precision);
			    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    		    if(onclick != 0){object_cnt++;}
			    /* object_cnt++;*/
			    add_to_buffer(tmp_buffer);reset();
			    dragstuff[8] = 1;
			    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
			    break;
    		}
    	    }
    	    break;

	case ARROWS:
	/*
	@ arrows color,head (px),x1,y1,x2,y2...x_n,y_n
	@ alternative: vectors
	@ draw single headed arrows / vectors from (x1:y1) to (x2:y2) ... (x3:y3) to (x4:y4) etc ... in color 'color'
	@ use command <code>linewidth int</code> to adjust thickness of the arrow
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%arrows_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
	@%arrows_drag%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
	@%arrows_drag_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%# Click arrow(s) to activate %slider 0,2*pi,300,30,angle degrees,Rotate%slider -5,5*pi,300,30,x display,move in x-direction%slider -10,10*pi,300,30,y display,move in y-direction%arrows red,8,0,0,4,3,0,0,2,4,0,0,-2,4,0,0,-3,-4,0,0,3,-2%
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    arrow_head = (int) get_real(infile,0);/* h */
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if( use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,8,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	        add_to_buffer(tmp_buffer);
		if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    dragstuff[8] = 1;
	    reset();
	    break;

	case ARROW2:
	/*
	@ arrow2 x1,y1,x2,y2,h,color
	@ draw a double headed arrow/vector from (x1:y1) to (x2:y2)<br>with arrowhead size h in px and in color ''color``
	@ use command <code>arrowhead int</code> to adjust the arrow head size
	@ use command <code>linewidth int</code> to adjust thickness of the arrow
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%arrow2%size 400,400%xrange -10,10%yrange -10,10%drag xy%arrow2 0,0,4,3,8,blue%
	*/
    	    for(i=0;i<6;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: double_data[2] = get_real(infile,0);break; /* x */
    		    case 3: double_data[3] = get_real(infile,0);break; /* y */
    		    case 4: arrow_head = (int) get_real(infile,0);break;/* h */
    		    case 5: stroke_color = get_color(infile,1);/* name or hex color */
    			if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
    			if( use_affine == 1 ){ transform(4,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}/* object_cnt++;*/
    			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
			dragstuff[10] = 1;
			reset();
			break;
    		}
    	    }
    	    break;

	case ARROWS2:
	/*
	@ arrows2 color,head (px),x1,y1,x2,y2...x_n,y_n
	@ draw double headed arrows / vectors from (x1:y1) to (x2:y2) ... (x3:y3) to (x4:y4) etc ... in color ''color``
	@ use command <code>linewidth int</code> to adjust thickness of the arrows
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%arrows2%size 400,400%xrange -10,10%yrange -10,10%onclick%arrows2 red,8,0,0,4,3,1,1,2,4,2,2,-2,4,3,3,-3,-4,0,0,3,-2%
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    arrow_head = (int) get_real(infile,0);/* h */
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if( use_affine == 1 ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	        check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,10,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],arrow_head,arrow_head,arrow_head,arrow_head,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	        add_to_buffer(tmp_buffer);
	        if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    dragstuff[10] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;
	case ARROWHEAD:
	/*
	@ arrowhead int
	@ default 8 (pixels)
	*/
	    arrow_head = (int) (get_real(infile,1));
	    break;

	case AUDIO:
	/*
	@ audio x,y,w,h,loop,visible,audiofile location
	@ x,y: left top corner of audio element (in xrange / yrange)
	@ w,y: width and height in pixels
	@ loop: 0 or 1 ( 1 = loop audio fragment)
	@ visible: 0 or 1 (1 = show controls)
	@ audio format may be in *.mp3 or *.ogg
	@ If you are using *.mp3: be aware that FireFox will not (never) play this ! (Pattented format)
	@ if you are using *.ogg: be aware that Microsoft based systems not support it natively
	@ To avoid problems supply both types (mp3 and ogg) of audiofiles.<br>the program will use both as source tag
	*/
	    js_function[DRAW_AUDIO] = 1;
	    for(i=0;i<7;i++){
		switch(i){
		    case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x in x/y-range coord system -> pixel */
		    case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y in x/y-range coord system  -> pixel */
		    case 2: int_data[2] = (int) (get_real(infile,0)); break; /* pixel width */
		    case 3: int_data[3] = (int) (get_real(infile,0)); break; /* height pixel height */
		    case 4: int_data[4] = (int) (get_real(infile,0)); if(int_data[4] != TRUE){int_data[4] = FALSE;} break; /* loop boolean */
		    case 5: int_data[5] = (int) (get_real(infile,0)); if(int_data[5] != TRUE){int_data[5] = FALSE;} break; /* visible boolean */
		    case 6:
		    temp = get_string(infile,1);
		    if( strstr(temp,".mp3") != 0 ){ temp = str_replace(temp,".mp3","");}
		    if( strstr(temp,".ogg") != 0 ){ temp = str_replace(temp,".ogg","");}
		    string_length = 1 + snprintf(NULL,0,  "draw_audio(%d,%d,%d,%d,%d,%d,%d,\"%s.ogg\",\"%s.mp3\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],temp,temp);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_audio(%d,%d,%d,%d,%d,%d,%d,\"%s.ogg\",\"%s.mp3\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],temp,temp);
		    add_to_buffer(tmp_buffer);
		    break;
		    default:break;
		}
	    }
	    reset();
	    break;


	case AXIS_NUMBERING:
	/*
	    @ axisnumbering
	    @ keyword (no arguments required)
	    @ for special numbering of x-axis or y-axis see grid related commands <a href="#axis">axis</a> <a href="#xaxis">xaxis</a>, <a href="#xaxisup">xaxisup</a>, <a href="#noxaxis">noxaxis</a>, <a href="#yaxis">yaxis</a>, <a href="#yaxisup">yaxisup</a>, <a href="#noyaxis">noyaxis</a>
	    @ to be used before command grid (see <a href="#grid">command grid</a>)
	*/
	    use_axis_numbering++;
	    break;
	case AXIS:
	/*
	    @ axis
	    @ keyword (no arguments required)
	    @ to be used before command grid (see <a href="#grid">command grid</a>)

	*/
	    use_axis = TRUE;
	    break;

	case BARCHART:
	/*
	@ barchart x_1:y_1:color_1:x_2:y_2:color_2:...x_n:y_n:color_n
	@ may <b>only</b> to be used together with command <a href='#grid'>grid</a>
	@ can be used together with freestyle x-axis/y-axis texts: see commands <a href='#xaxis'>xaxis</a>,<a href='#xaxisup'>xaxisup</a> and <a href='#yaxis'>yaxis</a>
	@ use command <a href='#legend'>legend</a> to provide an optional legend in right-top-corner
	@ multiple barchart command may be used in a single script
	@ also see command <a href='#piechart'>piechart</a>
	@ note: your arguments are not checked by canvasdraw: use your javascript console in case of trouble...
	@%barchart%size 400,400%xrange -1,10%yrange -2,14%legend legend Z:legend A:this is B:C:D:E:F:G:H:X%legendcolors green:red:orange:lightblue:cyan:gold:purple:darkred:yellow:lightgreen%xaxis 0:Z:1:A:2:B:3:C:4:D:5:E:6:F:7:G:8:H:9:X%noyaxis%precision 1%fontfamily bold 15px Arial%grid 1,1,white%barchart 0:5.5:green:2:5.5:red:4:6.5:orange:6:8:lightblue:8:11:cyan:1:5.5:gold:3:9:purple:5:4:darkred:7:7:yellow:9:1:lightgreen%mouse red,14
	*/
	    temp = get_string(infile,1);
	    if( strstr( temp,":" ) != 0 ){ temp = str_replace(temp,":","\",\""); }
	    fprintf(js_include_file,"var barchart_%d = [\"%s\"];",barchart_cnt,temp);
	    barchart_cnt++;
	    reset();
	    break;

	case BEZIER:
	/*
	@ bezier color,x_start,y_start,x_first,y_first,x_second,y_second,x_end,y_end
	@ draw a bezier curve between points, starting from (x_start:y_start)
	@ can <b>not</b> be dragged or set onclick
	*/
	    js_function[DRAW_BEZIER] = 1;
	    decimals = find_number_of_digits(precision);
	    for(i = 0 ; i < 9; i++){
	        switch(i){
	    	    case 0: stroke_color = get_color(infile,0);break;
		    case 1: double_data[0] = get_real(infile,0);break;/* start x */
		    case 2: double_data[1] = get_real(infile,0);break;/* start y */
		    case 3: double_data[2] = get_real(infile,0);break;/*The x-coordinate of the first Bézier control point */
	    	    case 4: double_data[3] = get_real(infile,0);break;/*The y-coordinate of the first Bézier control point */
		    case 5: double_data[4] = get_real(infile,0);break;/*The x-coordinate of the second Bézier control point */
	    	    case 6: double_data[5] = get_real(infile,0);break;/*The y-coordinate of the second Bézier control point */
		    case 7: double_data[6] = get_real(infile,0);break;/*The x-coordinate of the Bézier end point */
		    case 8: double_data[7] = get_real(infile,1);/*The y-coordinate of the Bézier end point */
    	    		if(use_rotate == TRUE ){rotate(8,angle,rotationcenter,2);}
    	    		if(use_affine == TRUE ){ transform(2,5);}
			string_length = 1 + snprintf(NULL,0,"draw_bezier(%d,%d,[%f,%f,%f,%f,%f,%f,%f,%f],\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.2f);",STATIC_CANVAS,line_width,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],double_data[6],double_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"draw_bezier(%d,%d,[%f,%f,%f,%f,%f,%f,%f,%f],\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.2f);",STATIC_CANVAS,line_width,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],double_data[6],double_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle);
			add_to_buffer(tmp_buffer);
			break;
		    default: break;
		}
	    }
	    reset();
	    break;


	case BGCOLOR:
	/*
	 @ bgcolor colorname or #hex
	 @ use this color as background of the "div" containing the canvas(es)
	 @%bgcolor%size 400,400%xrange -10,10%yrange -10,10%bgcolor lightblue
	*/
	/* [255,255,255]*/
	    bgcolor = get_string(infile,1);
	    if(strstr(bgcolor,"#") == NULL){ /* convert colorname -> #ff00ff */
		int found = 0;
	        for( i = 0; i < NUMBER_OF_COLORNAMES ; i++ ){
		    if( strcmp( colors[i].name , bgcolor ) == 0 ){
			bgcolor = colors[i].hex;
			found = 1;
		        break;
	    	    }
		}
		if(found == 0){canvas_error("your bgcolor is not in my rgb.txt data list: use hexcolor...something like #a0ffc4");}
	    }
	    fprintf(js_include_file,"/* set background color of canvas div */\ncanvas_div.style.backgroundColor = \"%s\";canvas_div.style.opacity = %f;\n",bgcolor,fill_opacity);
	    break;

	case BGIMAGE:
	/*
	 @ bgimage image_location
	 @ use an image as background; technical: we use the background of ''canvas_div``
	 @ the background image will be resized to match "width = xsize" and "height = ysize"
	 @%bgimage%size 400,400%xrange -10,10%yrange -10,10%bgimage https://wims.unice.fr/wims/gifs/en.gif
	*/
	URL = get_string(infile,1);
	fprintf(js_include_file,"/* set background image to canvas div */\ncanvas_div.style.backgroundImage = \"url(%s)\";canvas_div.style.backgroundSize = \"%dpx %dpx\";\n",URL,xsize,ysize);
	    break;

	case BLINK:
	/*
	 @ blink time(seconds)
	 @ NOT IMPLEMETED -YET
	*/
	    break;

	case BOXPLOT:
	/*
	@ boxplot x_or_y,box-height_or_box-width,position,min,Q1,median,Q3,max
	@ example:<br><code>xrange 0,300<br>yrange 0,10<br>boxplot x,4,8,120,160,170,220,245</code><br>meaning: create a boxplot in x-direction, with height 4 (in yrange) and centered around line y=8
	@ example:<br><code>xrange 0,10<br>yrange 0,300<br>boxplot y,4,8,120,160,170,220,245</code><br>meaning: create a boxplot in y-direction, with width 4 (in xrange) and centered around line x=8
	@ use command <a href='#filled'>filled</a> to fill the box<br><b>note:</b> the strokecolor is used for filling Q1, the fillcolor is used for filling Q3
	@ use command <a href='#fillpattern'>fillpattern some_pattern</a> to use a (diamond for Q1, hatch for Q3) pattern.
	@ use command <a href='#opacity'>opacity</a> to adjust fill_opacity of stroke and fill colours
	@ use command <a href='#legend'>legend</a> to automatically create a legend <br>unicode allowed in legend<br>use command <a href='#fontfamily'>fontfamily</a> to set the font of the legend.
	@ there is no limit to the number of boxplots used.
	@ can <b>not</b> be set draggable and <a href='#onclick'>onclick</a> is not ready yet
	@ use keyword <a href="#userboxplot">userboxplot</a> before command boxplot, if a pupil must draw a boxplot (using his own min,Q1,median,Q3,max data)
	@ use keyword <a href="#userboxplotdata">userboxplotdata</a> before command boxplot, if a pupil must generate the data by some means.
	@ use command <a href="#boxplotdata">boxplotdata</a> when the boxplot should be drawn from wims-generated raw statistical date
	@%boxplot_1%size 400,400%xrange 0,300%yrange 0,10%opacity 120,50%filled%fillcolor orange%strokecolor blue%linewidth 2%boxplot x,4,8,120,160,170,220,245
	@%boxplot_2%size 400,400%xrange 0,10%yrange 0,300%opacity 120,50%filled%fillcolor orange%strokecolor blue%linewidth 2%boxplot y,4,8,120,160,170,220,245
	@%boxplot_3%size 400,400%xrange 0,100%yrange 0,10%fillpattern hatch%linewidth 3%fillcolor red%strokecolor green%boxplot x,1,2,4,14,27,39,66%strokecolor blue%boxplot x,1,4,15,45,50,66,87%strokecolor red%boxplot x,1,6,45,70,80,90,100%strokecolor orange%boxplot x,1,8,28,38,48,56,77%mouse red,16
	*/
	    js_function[DRAW_BOXPLOT] = 1;
	    for(i=0;i<8;i++){
		switch(i){
		    case 0: temp = get_string_argument(infile,0);
			    if( strstr(temp,"x") != 0){int_data[0] = 1;}else{int_data[0] = 0;} break; /* x or y */
		    case 1: double_data[0] = get_real(infile,0);break;/* height | width  */
		    case 2:
		    if( js_function[DRAW_JSBOXPLOT] == 0 ){
		     double_data[1] = get_real(infile,0);
		     fprintf(js_include_file,"var boxplot_source = 0;\n");/* we use given min,Q1,median,Q3,max */
		    }
		    else
		    {
		     double_data[1] = get_real(infile,1);
		     double_data[2] = 1;
		     double_data[3] = 1;
		     double_data[4] = 1;
		     double_data[5] = 1;
		     double_data[6] = 1;
		     double_data[7] = 1;
		     i=8;
		    }
		    break;/* center value x or y */
		    case 3: double_data[2] = get_real(infile,0); break;/* min */
		    case 4: double_data[3] = get_real(infile,0); break;/* Q1 */
		    case 5: double_data[4] = get_real(infile,0); break;/* median */
		    case 6: double_data[5] = get_real(infile,0); break;/* Q3 */
		    case 7: double_data[6] = get_real(infile,1); break;/* max */
		    default:break;
		}
	    }
	    decimals = find_number_of_digits(precision);
	    /*function draw_boxplot(canvas_type,xy,hw,cxy,data,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1)*/
	    string_length = 1 + snprintf(NULL,0,  "draw_boxplot(%d,%d,%.*f,%.*f,[%.*f,%.*f,%.*f,%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d);\n",BOXPLOT_CANVAS+boxplot_cnt,int_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],decimals,double_data[6],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1]);
	    check_string_length(string_length);
	    tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,  "draw_boxplot(%d,%d,%.*f,%.*f,[%.*f,%.*f,%.*f,%.*f,%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d);\n",BOXPLOT_CANVAS+boxplot_cnt,int_data[0],decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],decimals,double_data[4],decimals,double_data[5],decimals,double_data[6],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1]);
	    add_to_buffer(tmp_buffer);
	    boxplot_cnt++;
	    reset();
	break;
	case BOXPLOTDATA:
	/*
	@ boxplotdata some_data
	@ 'some_data' are a list of numbers separated by a comma "," (items)
	@ only be used before command <code>boxplot</code>: the command <a href="#boxplot">boxplot</a> will provide the boxplot drawing of the data.
	@ xrange 0,100<br>yrange 0,10<br>boxplotdata 11,22,13,15,23,43,12,12,14,2,45,32,44,13,21,24,13,19,35,21,24,23<br>boxplot x,4,5
	@ note: wims will not check your data input | format. use js-error console to debug any problems.
	@ a javascript function <code>statistics()</code> will parse the data and calculate the values [min,Q1,median,Q3,max] and hand them to the boxplot draw function.
	@ only a single call to <code>boxplotdata</code> can be made. If multiple boxplots should be present in a single canvas, then use multiple calls to command <a href='#boxplot'>boxplot</a>
	@%boxplotdata%size 400,400%xrange 0,100%yrange 0,10%strokecolor orange%fillpattern hatch%linewidth 3%strokecolor green%boxplotdata 11,22,13,15,23,43,12,12,14,2,45,32,44,13,21,24,13,19,35,21,24,23%boxplot x,2,2%mouse red,16
	*/
	    js_function[DRAW_JSBOXPLOT] = 1;
	    js_function[DRAW_BOXPLOT] = 1;
	    fprintf(js_include_file,"var boxplot_source = 1;var jsboxplot_data = [%s];\n",get_string(infile,1));

	break;

	case CANVASTYPE:
	 canvas_type = (int) (get_real(infile,1));
	/*
	@ canvastype TYPE
	@ for now only useful before commands filltoborder / floodfill / clickfill etc operations<br>Only the images of this TYPE will be scanned and filled
	@ default value of TYPE is DRAG_CANVAS e.g. 5 (all clickable / draggable object are in this canvas)
	@ use another TYPE, if you know what you are doing...
	@ other possible canvasses (e.g. transparent PNG pictures, xsize &times; ysize on top of each other)<ul><li> EXTERNAL_IMAGE_CANVAS 0</li><li> BG_CANVAS 	1</li><li> STATIC_CANVAS	2</li><li> MOUSE_CANVAS	3</li><li> GRID_CANVAS	4</li><li> DRAG_CANVAS	5</li><li> DRAW_CANVAS	6</li><li> TEXT_CANVAS	7</li><li> CLOCK_CANVAS	8</li><li> ANIMATE_CANVAS	9</li><li> TRACE_CANVAS	10</li><li>BOXPLOT_CANVAS 11</li><li> JSPLOT_CANVAS	100, will increase with every call</li><li> FILL_CANVAS	200, will increase with every call</li><li> USERDRAW_JSPLOT 300, will increase with every call</li><li>CLICKFILL_CANVAS 400, will increase with every call/click</li><li>BOXPLOT_CANVAS 500, will increase with every call</li></ul>
	*/
	break;

	case CENTERED:
	 use_offset = 4;
	 /*
	 @ centered
	 @ keyword ; to place the text centered (in width and height) on the text coordinates(x:y)
	 @ may be used for text exactly centered on its (x;y)
	 @ use <a href="#fontfamily">fontfamily</a> for setting the font
	 @ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the ''drag/drop/onclick-library``)
	 @%centered%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
	*/
	break;

	case CENTERSTRING:
	/*
	 @ centerstring color,y-value,the text string
	 @ title color,y-value,the text string
	 @ draw a string centered on the canvas at y = y-value
	 @ can not be set ''onclick`` or ''drag xy`` (...)
	 @ unicode supported: <code>centerstring red,5,\\u2232</code>
	 @ use a command like <code>fontfamily italic 24pt Arial</code> to set fonts on browser that support font change
	 @%centerstring%size 400,400%xrange -10,10%yrange -10,10%bgcolor lightblue%fontfamily italic 22pt Courier%centerstring blue,7,the center
	*/
	    js_function[DRAW_CENTERSTRING] = 1;
	    for(i=0;i<3;i++){
		switch(i){
		    case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		    case 1: double_data[0] = get_real(infile,0);break; /* y in xrange*/
		    case 2: temp = get_string_argument(infile,1);
			    /* draw_text = function(canvas_type,y,font_family,stroke_color,stroke_opacity,text) */
			    decimals = find_number_of_digits(precision);
			    string_length = 1 + snprintf(NULL,0,"draw_centerstring(%d,%.*f,\"%s\",\"%s\",%.2f,\"%s\");\n",canvas_root_id,decimals,double_data[0],font_family,stroke_color,stroke_opacity,temp);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_centerstring(%d,%.*f,\"%s\",\"%s\",%.2f,\"%s\");\n",canvas_root_id,decimals,double_data[0],font_family,stroke_color,stroke_opacity,temp);
			    add_to_buffer(tmp_buffer);
			    break;
		    default:break;
		}
	    }
	    break;
	case CHEMTEX:
	/*
	chemtex
	keyword...needs to be the first command in the script (even before the ''size`` command)
	only for KaTeX enabled typesetting !
	will include 80kB large js-library for chemisty typesetting
	using <a href="http://85.148.206.56/wims/download/katex.for.wims.tar.gz">KaTeX</a> : <code>katex x,y,\\ce{ chemistry tex code} like : \\ce{ Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2- }</code>
	using MathJaX : <code>latex x,y,\\ce{ chemistry tex code} like : \\ce{ Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2- }</code>
	see https://mhchem.github.io/MathJax-mhchem/
	%chemtex_katex_mathjax%chemtex%size 400,400%xrange -10,10%yrange -10,10%snaptogrid%fontfamily 22px Arial%strokecolor red%drag xy%centered%latex 0,8,\\ce{Hg^2+}%drag xy%centered%latex 0,4,\\ce{\\xrightarrow{\\text{I}^{-}}}%drag xy%centered%latex 0,0,\\ce{HgI2}%centered%drag xy%latex 0,-4,\\ce{\\xrightarrow{\\text{I}^{-}}}%drag xy%centered%latex 0,-8,\\ce{[Hg^{II}I4]^2-}
	*/
	 found_size_command = 1;
	  fprintf(stdout,"\n<script src=\"scripts/js/KaTeX/mhchem.js\" defer></script>\n");
	break;

	case CIRCLE:
	/*
	@ circle xc,yc,width (2*r in pixels),color
	@ use command <code>fcircle xc,yc,d,color</code>
	@ alternative: disk
	@ use command <code>fillcolor color</code> to set the fillcolor
	@ may be set <a href='#drag'>draggable</a> / <a href='#onclick'>onclick</a>
	@ will shrink / expand on zoom out / zoom in
	@%circle%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%drag xy%circle 0,0,60,red%zoom red
	*/
    	    for(i=0;i<4;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: double_data[2] = px2x((get_real(infile,0))/2) - px2x(0);break; /* for zoom in/out: radius in 'dx' xrange*/
    		    case 3: stroke_color = get_color(infile,1);/* name or hex color */
    			if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
    			if(use_affine == TRUE ){ transform(2,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.*f],[%.*f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],double_data[2],double_data[2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.*f],[%.*f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],double_data[2],double_data[2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}/* object_cnt++;*/
			dragstuff[13] = 1;
			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
			reset();
			break;
		    default : break;
		}
	    }
	    break;

	case CIRCLES:
	/*
	@ circles color,xc1,yc1,r1,xc2,yc2,r2...xc_n,yc_n,r_n
	@ <b>attention</b> r = radius in x-range (!)
	@ use keyword <code>filled</code> or command <code>fcircles</code> to produce solid circles
	@ alternative: disks
	@ use command <code>fillcolor color</code> to set the fillcolor
	@ may be set <a href='#drag'>draggable</a> / <a href='#onclick'>onclick</a> (individually)
	@ will shrink / expand on zoom out / zoom in
	@%circles_drag%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%drag xy%circles blue,0,0,2,2,2,3,-3,-3,3,3,3,4,3,-4,2%zoom red
	@%circles_onclick%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%onclick%circles blue,0,0,2,2,2,3,-3,-3,3,3,3,4,3,-4,2%zoom red
	@%circles_drag_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%# Click circles(s) to activate%opacity 200,50%fillcolor orange%rotationcenter 2,3%slider 0,2*pi,300,30,angle degrees,Rotate%slider -5,5*pi,300,30,x display,move in x-direction%slider -10,10*pi,300,30,y display,move in y-direction%fcircles blue,0,0,0.5,2,2,1,-3,-3,1.5,3,3,0.5,3,-4,0.5
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=1;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		switch (i%3){
		 case 1:double_data[i-1] = get_real(infile,0);break; /* x */
		 case 2:double_data[i-1] = get_real(infile,0);break; /* y */
		 case 0:double_data[i-1] = get_real(infile,1);break; /* r */
		}
		i++;
	    }
    	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,3);}
    	    if(use_affine == TRUE ){ transform(i-1,3);}
    	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+3){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.*f],[%.*f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[c+2],double_data[c+2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,13,[%.*f],[%.*f],[%.3f],[%.3f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[c+2],double_data[c+2],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    reset();
	    dragstuff[13] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case CLEARBUTTON:
	/*
	 @ clearbutton value
	 @ alternative: delete
	 @ alternative: erase
	 @ adds a button to clear the <a href="#userdraw">userdraw</a> canvas with text ''value``
	 @ <b>attention</b> command <code>clearbutton</code> is incompatible with <a href="#multidraw">multidraw</a> based drawings<br/>(in <code>multidraw</code> there is always a remove_object_button for every draw primitive)
	 @ normally <a href="#userdraw">userdraw</a> primitives have the option to use middle/right mouse button on<br> a point of the object to remove this specific object...this clear button will remove all drawings
	 @ uses the tooltip placeholder div element: may not be used with command <code>intooltip</code>
	 @ use command <a href="#css">css</a> to style the button...
	 @ the clearbutton will have id="canvas_scripts[%d]" ; starting with %d=0 for the first script<br>to change the style of all ''clearbutton`` of all included canvasdraw scripts, use something like<br><code>if(document.getElementById("clearbutton"+canvas_scripts[0])){<br>&nbsp;var p = 0;<br>&nbsp;while(document.getElementById("clearbutton"+canvas_scripts[p])){<br>&nbsp;&nbsp;document.getElementById("clearbutton"+canvas_scripts[p]).className="some_class_name";<br>&nbsp;&nbsp;&lt;!&minus;&minus;</code> or <code>document.getElementById("clearbutton"+canvas_scripts[p]).setAttribute("style","some_style"); &minus;&minus;&gt;<br>&nbsp;&nbsp;p++;<br>&nbsp;};<br>};</code>
	 @%clearbutton%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 255,50%userdraw circles,red%clearbutton Remove All
	*/
	if(reply_format == 29){/* eg multidraw is selected */
	// canvas_error("command clearbutton incompatible with multidraw...only suitable for userdraw");
	}
	  add_clear_button(css_class,get_string(infile,1));
	break;

	case CLOCK:
	/*
	@ clock x,y,r(px),H,M,S,type hourglass,interactive [ ,H_color,M_color,S_color,background_color,foreground_color ]
	@ use command <code>opacity stroke-opacity,fill-opacity</code> to adjust foreground (stroke) and background (fill) transparency
	@ type hourglass:<br>type = 0: only segments<br>type = 1: only numbers<br>type = 2: numbers and segments
	@ colors are optional: if not defined, default values will be used<br>default colours: clock 0,0,60,4,35,45,1,2<br>custom colours: clock 0,0,60,4,35,45,1,2,,,,yellow,red<br>custom colours: clock 0,0,60,4,35,45,1,2,white,green,blue,black,yellow
	@ if you don't want a seconds hand (or minutes...), just make it invisible by using the background color of the hourglass...
	@ interactive <ul><li>0: not interactive, just clock(s)</li><li>1: function read_canvas() will read all active clocks in H:M:S format<br>The active clock(s) can be adjusted by pupils</li><li>2: function read_canvas() will return the clicked clock <br>(like multiplechoice; first clock in script in nr. 0 )</li><li>3: no prefab buttons...create your own buttons (or other means) to make the clock(s) adjustable by javascript function set_clock(num,type,diff)<br>wherein: num = clock id (starts with 0) ; type = 1 (hours) ; type = 2 (minutes) ; type = 3 (seconds) <br>and diff = the increment of 'type' (positive or negative)</li></ul>
	@ canvasdraw will not check validity of colornames...the javascript console is your best friend
	@ no combinations with other reply_types allowed, for now
	@ if interactive is set to ''1``, 6 buttons per clock will be displayed for adjusting a clock (H+ M+ S+ H- M- S-)<br> set_clock(clock_id,type,incr) <br>first clock has clock_id=0 ; type: H=1,M=2,S=3 ; incr: increment integer
	@ note: if you need multiple -interactive- clocks on a webpage, use multiple ''clock`` commands in a single script !<br>and <i>not multiple canvas scripts</i> in a single page
	@ note: clocks will not zoom or pan, when using command <a href='#zoom'>zoom</a>
	@%clock_1%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,0,0,red,green,blue,lightgrey,black
	@%clock_2%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,1,1,red,green,blue,lightgrey,black
	@%clock_3%size 400,400%xrange -10,10%yrange -10,10%clock -5,0,80,4,35,45,2,2,red,green,blue,lightgrey,black%clock 5,0,80,3,15,65,2,2,red,green,blue,lightgrey,black
	@%clock_4%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,0,0,red,green,blue,lightgrey,black
	@%clock_5%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,1,1,red,green,blue,lightgrey,black
	@%clock_6%size 400,400%xrange -10,10%yrange -10,10%clock -5,0,80,4,35,45,2,2,red,green,blue,lightgrey,black%clock 5,0,80,8,55,15,2,2,red,green,blue,lightgrey,black
	@%clock_7%size 400,400%xrange -10,10%yrange -10,10%clock 0,0,120,4,35,45,2,0,red,green,blue,lightgrey,black
	*/
	    js_function[DRAW_CLOCK] = 1;
	    js_function[INTERACTIVE] = 1;

	/*    var clock = function(xc,yc,radius,H,M,S,h_color,m_color,s_color,bg_color,fg_color) */
	    for(i=0;i<9;i++){
	     switch(i){
	      case 0: int_data[0] = x2px(get_real(infile,0)); break; /* xc */
	      case 1: int_data[1] = y2px(get_real(infile,0)); break; /* yc */
	      case 2: int_data[2] = get_real(infile,0);break;/* radius in px */
	      case 3: int_data[3] = get_real(infile,0);break;/* hours */
	      case 4: int_data[4] = get_real(infile,0);break;/* minutes */
	      case 5: int_data[5] = get_real(infile,0);break;/* seconds */
	      case 6: int_data[6] = get_real(infile,0);if(int_data[6] < 0 || int_data[6] > 2){canvas_error("hourglass can be 0,1 or 2");}break;/* type hourglass */
	      case 7: int_data[7] = (int)(get_real(infile,1));/* interactive 0,1,2*/
	        switch(int_data[7]){
		    case 0:break;
	    	    case 1:if(clock_cnt == 0){
	    		   if( reply_format == 0 ){
	    		    reply_format = 18; /* user sets clock */
	    		    /* string_length = 1 + snprintf(NULL,0,"set_clock = function(num,type,diff){var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
	    		       check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    		       snprintf(tmp_buffer,string_length,"set_clock = function(num,type,diff){var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
	    		       add_to_buffer(tmp_buffer);
	    		   */
	    		    fprintf(js_include_file,"set_clock = function(num,type,diff){if(wims_status == \"done\"){return;};var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
	    		   }
	    		   else
			   {
			    canvas_error("interactive clock may not be used together with other reply_types...");
			   }
			  }
			  fprintf(stdout,"<p style=\"text-align:center\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,1)\" value=\"H+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,1)\" value=\"M+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,1)\" value=\"S+\"><br><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,-1)\" value=\"H&minus;\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,-1)\" value=\"M&minus;\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,-1)\" value=\"S&minus;\"></p>",css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt);
		    break;
	    	    case 3:if(clock_cnt == 0){
	    	            if( reply_format == 0 ){
	    	             reply_format = 18; /* user sets clock */
	    	             fprintf(js_include_file,"set_clock = function(num,type,diff){if(wims_status == \"done\"){return;};var name = eval(\"clocks\"+num);switch(type){case 1:name.H = parseInt(name.H+diff);break;case 2:name.M = parseInt(name.M+diff);break;case 3:name.S = parseInt(name.S+diff);break;default: break;};name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,1,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};\n");
	    		    }
			    else
			    {
			     canvas_error("interactive clock may not be used together with other reply_types...");
			    }
			   }
			    /*
			    fprintf(stdout,"<p style=\"text-align:center\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,1)\" value=\"H+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,1)\" value=\"M+\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,1)\" value=\"S+\"><br><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,1,-1)\" value=\"H&minus;\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,2,-1)\" value=\"M&minus;\"><input class=\"%s\" type=\"button\" onclick=\"javascript:set_clock(%d,3,-1)\" value=\"S&minus;\"></p>",css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt,css_class,clock_cnt);
			   */
		    break;
		    case 2:if( reply_format == 0 ){
				reply_format = 19; /* "onclick */
				js_function[INTERACTIVE] = 1;
				fprintf(js_include_file,"\n/* begin onclick handler for clocks */\nvar reply = new Array();canvas_div.addEventListener( 'mousedown', user_click,false);\n\nfunction user_click(evt){if(evt.button == 1){var canvas_rect = clock_canvas.getBoundingClientRect();var x = evt.clientX - canvas_rect.left;var y = evt.clientY - canvas_rect.top;var p = 0;var name;var t = true;while(t){try{name = eval('clocks'+p);if( x < name.xc + name.radius && x > name.xc - name.radius ){if( y < name.yc + name.radius && y > name.yc - name.radius ){reply[0] = p;name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,\"lightblue\",name.fg_color);};}else{clock_ctx.clearRect(name.xc-name.radius,name.yc-name.radius,name.xc+name.radius,name.yc+name.radius);name = new clock(name.xc,name.yc,name.radius,name.H,name.M,name.S,name.type,name.interaction,name.H_color,name.M_color,name.S_color,name.bg_color,name.fg_color);};p++;}catch(e){t=false;};};};};\n");
			    }
			    else
			    {
			    	if( reply_format != 19){
			    	   canvas_error("clickable clock(s) may not be used together with other reply_types...");
			    	 }
			    }
		     break;
		     default: canvas_error("interactive must be set 0,1 or 2");break;
		}
		break;
		case 8:
			if(clock_cnt == 0 ){ /* set opacity's just once .... it should be a argument to clock(), for now it's OK */
			    fprintf(js_include_file,"var clock_bg_opacity = %.2f;var clock_fg_opacity = %.2f;",fill_opacity,stroke_opacity);
			}
			temp = get_string(infile,3);/* optional colors, like: ,,red,,blue*/
			if( strstr( temp,",") != 0 ){ temp = str_replace(temp,",","\",\""); }
			else{
			/* h_color,m_color,s_color,bg_color,fg_color */
			temp = ",black\",\"black\",\"black\",\"white\",\"black";}
			string_length = 1 + snprintf(NULL,0,"clocks%d = new clock(%d,%d,%d,%d,%d,%d,%d,%d,\"%s\");\n",clock_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],temp);
	    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"clocks%d = new clock(%d,%d,%d,%d,%d,%d,%d,%d,\"%s\");\n",clock_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],temp);
			add_to_buffer(tmp_buffer);
			fprintf(js_include_file,"var clocks%d;",clock_cnt);
			clock_cnt++;
			break;
		default:break;
	     }
	    }
	    break;


	case COLORPALETTE:
	/*
	 @ colorpalette color_name_1,color_name_2,...,color_name_8
	 @ opacity will be the same for all colors and is set by command <a href="#opacity">opacity [0-255],[0-255]</a>
	 @ can be used with command <a href='#userdraw'>userdraw clickfill,color</a> when more than one fillcolor is wanted.<br>in that case use for example <a href='#replyformat'>replyformat 10</a> ... reply=x1:y1:color1,x2:y2:color2...<br>the pupil can choose from the given colors by clicking small coloured buttons.<br> the click coordinates and corresponding fillcolor will be stored in read_canvas()...when using the appropriate replyformat.<br>the first color of the palette is color=0
	 @ make sure to include the ''remove button`` by using command <a href='#clearbutton'>clearbutton some_text</a>
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'colorpalette' is incompatible with command 'intooltip tip_text'");}
	    fprintf(js_include_file,"var multifillcolors = [];var palettecolors = [");
	    while( ! done ){
	        temp = get_color(infile,1);
		fprintf(js_include_file,"\"%s\",",temp);
	    }
	    fprintf(js_include_file,"];");/* add black to avoid trouble with dangling comma... */
	    add_color_palette(css_class);
	    break;

	case COMMENT:
	    sync_input(infile);
	    break;


	case COPY:
	/*
	@ copy x,y,x1,y1,x2,y2,[filename URL]
	@ The image may be "bitmap" or "SVG"
	@ Insert the region from (x1,y1) to (x2,y2) (in pixels) of [filename] to (x,y) in x/y-range
	@ If x1=y1=x2=y2=-1, the whole [filename URL] is copied.
	@ [filename] is the URL of the image
	@ <em>TODO:move special image functions to generic 'dragstuff' library</em>
	@ URL is normal URL of network reachable image file location
	@ if command <a href="#drag">drag x/y/xy</a> is set before command ''copy``, the images will be draggable<br>javascript function read_canvas(); will return the x/y coordinate data in xrange/yrange of all -including non draggable- images<br>the command drag is only valid for the next image<br>draggable / non-draggable images may be mixed<br>may be used together with preceding keywords ''snaptogrid``, ''xsnaptogrid``, ''ysnaptogrid`` or <code>snaptopoints x1,y1,x2,y2...</code>.
	@ if keyword <a href="#onclick">onclick</a> is set before command ''copy`` the image(s) is clickable (marked with a green rectangle around the image)<br>use 'read_dragdrop' to get the number of the clicked image(s)<br>use command 'clearbutton some_text' to reset the reply/click array.<br>example: 4 images; student clicked on image 2 and 3: reply = 0,1,1,0<br>after clicking the clear button: reply = 0,0,0,0<br>May be mixed with commands ''drag x|y|xy`` (use javascript read_canvas to get the new coordinates
	@ ''onclick`` for external images may be mixed with canvas generated stuff (like lines,curves, embeded XML etc)
	@ you may draw / userdraw / drag other stuff on top of an "imported" image
	@ the use of a slider is not possible: if needed, use command <a href='#html'>html x,y,&lt;img src=my_image.svg /&gt; </a>
	@ use keyword <a href='#centered'>centered</a> before command ''copy`` to place image center at given coordinates.
	@%copy_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%copy -5,5,-1,-1,-1,-1,gifs/fr.gif%onclick%copy 5,5,-1,-1,-1,-1,gifs/en.gif%onclick%copy 5,-5,-1,-1,-1,-1,gifs/it.gif%onclick%copy -5,-5,-1,-1,-1,-1,gifs/cn.gif
	@%copy_drag_xy%size 400,400%xrange -10,10%yrange -10,10%# attention: left mouse click on the image will activate dragging...%# keep left mouse button pressed while moving the image !%drag xy%copy -5,5,-1,-1,-1,-1,gifs/fr.gif%drag xy%copy 5,5,-1,-1,-1,-1,gifs/en.gif%drag xy%copy 5,-5,-1,-1,-1,-1,gifs/it.gif%drag xy%copy -5,-5,-1,-1,-1,-1,gifs/cn.gif
	@%copy_drag_xy_snaptogrid%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%# attention: left mouse click on the image will activate dragging...%# keep left mouse button pressed while moving the image !%drag xy%# a function read_canvas_images() %copy -6,6,-1,-1,-1,-1,gifs/fr.gif%snaptogrid%drag xy%copy 6,6,-1,-1,-1,-1,gifs/en.gif%snaptogrid%drag xy%copy 6,-6,-1,-1,-1,-1,gifs/it.gif%snaptogrid%drag xy%copy -6,-6,-1,-1,-1,-1,gifs/cn.gif
	*/
	    for(i = 0 ; i<7;i++){
		switch(i){
		    case 0: double_data[0]=get_real(infile,0);break; /* x left top corner in x/y range  */
		    case 1: double_data[1]=get_real(infile,0);break; /* y left top corner in x/y range */
		    case 2: int_data[2]=(int)(get_real(infile,0));break;/* x1 in px of external image */
		    case 3: int_data[3]=(int)(get_real(infile,0));break;/* y1 in px of external image */
		    case 4: int_data[4]=(int)(get_real(infile,0));break;/* x2 --> width  */
		    case 5: int_data[5]=(int)(get_real(infile,0)) ;break;/* y2 --> height */
		    case 6: URL = get_string(infile,1);
			    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
			    if(use_affine == TRUE ){transform(2,2);}
			    int_data[0] = x2px(double_data[0]);
			    int_data[1] = y2px(double_data[1]);
			    int_data[6] = int_data[4] - int_data[2];/* swidth & width (if not scaling )*/
			    int_data[7] = int_data[5] - int_data[3];/* sheight & height (if not scaling )*/
			    if( onclick == 0 ){ /* no mouse needed static image copy  */
			     if(js_function[DRAW_EXTERNAL_IMAGE] == 0){/* create canvas just once */
			      fprintf(js_include_file,"var image_copy_canvas = create_canvas%d(%d,xsize,ysize);",canvas_root_id,STATIC_IMAGE_CANVAS);
			      js_function[DRAW_EXTERNAL_IMAGE] = 1;
			     }
			     string_length = 1 + snprintf(NULL,0,  "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],use_offset,int_data[10]);
			     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			     snprintf(tmp_buffer,string_length,    "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],use_offset,int_data[10]);
			    }
			    else /* onclick or drag & drop external copy images */
			    {
			     js_function[DRAG_EXTERNAL_IMAGE] = 1;
			     string_length = 1 + snprintf(NULL,0,  "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]);
			     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			     snprintf(tmp_buffer,string_length,    "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[2],int_data[3],int_data[6],int_data[7],int_data[0],int_data[1],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]);
			    }
			    add_to_buffer(tmp_buffer);
			    object_cnt++;
			    break;
		    default: break;
		}
	    }
	    reset();
	    break;
/*
HTML5 specs:
context.drawImage(img,sx,sy,swidth,sheight,x,y,width,height);
img 	Specifies the image, canvas, or video element to use
sx 	The x coordinate where to start clipping: x1 = int_data[0]
sy 	The y coordinate where to start clipping: x2 = int_data[1]
swidth 	The width of the clipped image: int_data[2] - int_data[0]
sheight The height of the clipped image: int_data[3] - int_data[1]
x 	The x coordinate where to place the image on the canvas: dx1 = int_data[4]
y 	The y coordinate where to place the image on the canvas: dy1 = int_data[5]
width 	The width of the image to use (stretch or reduce the image): dx2 - dx1 = int_data[6]
height 	The height of the image to use (stretch or reduce the image): dy2 - dy1 = int_data[7]
*/
	case COPYRESIZED:
	/*
	@ copyresized x1,y2,x2,y2,dx1,dy1,dx2,dy2,image_file_url
	@ The image may be any "bitmap" or "SVG"
	@ Insert the region from (x1,y1) to (x2,y2) (in pixels) of [ filename], <br>possibly resized,<br>to the region of (dx1,dy1) to (dx2,dy2) in x/y-range
	@ (dx1:dy1) must be left top corner; (dx2:dy2) must be right bottom corner of inserted image
	@ If x1=y1=x2=y2=-1, the whole [filename / URL ] is copied and resized.
	@ URL is normal URL of network reachable image file location<br>(as seen from public_html-root or network reachable 'http://some_server/my_images/test.gif'<br>(eg no special wims paths are searched !!)
	@ if command <a href="#drag">drag x/y/xy</a> is set before command ''copy``, the images will be draggable<br>javascript function read_canvas(); will return the x/y coordinate data in xrange/yrange of all -including non draggable- images<br>the command drag is only valid for the next image<br>draggable / non-draggable images may be mixed<br>may be used together with preceding keywords ''snaptogrid``,''xsnaptogrid``,''ysnaptogrid`` or <code>snaptopoints x1,y1,x2,y2...</code>
	@ if keyword <a href="#onclick">onclick</a> is set before command ''copy`` the image(s) is clickable (marked with a green rectangle around the image)<br>use ''read_dragdrop`` to get the number of the clicked image(s)<br>use command 'clearbutton some_text' to reset the reply/click array.<br>example: 4 images; student clicked on image 2 and 3: reply = 0,1,1,0<br>after clicking the clear button: reply = 0,0,0,0<br>May be mixed with commands ''drag x|y|xy`` (use javascript read_canvas to get the new coordinates
	@ ''onclick`` for external images may be mixed with canvas generated stuff (like lines,curves etc)
	@ you may draw / userdraw / drag stuff on top of an "imported" image
	@ when set draggable, there will be special function 'read_canvas_images()'<br>now dragging external images may be combined with 'read_canvas()' from <a href='#userdraw'>userdraw</a> or <a href='#multidraw'>multidraw</a><br>set command <a href='#precision'>precision</a> before command ''copy``
	@ use keyword <a href='#centered'>centered</a> before command 'copyresized' to place image center at given coordinates.
	@ <em>TODO:move special image functions to generic 'dragstuff' library</em>
	*/
	    for(i = 0 ; i<9;i++){
		switch(i){
		    case 0: int_data[0] = (int)(get_real(infile,0));break; /* x1 */
		    case 1: int_data[1] = (int)(get_real(infile,0));break; /* y1 */
		    case 2: int_data[2] = (int)(get_real(infile,0));break;/* x2 */
		    case 3: int_data[3] = (int)(get_real(infile,0));break;/* y2 */
		    case 4: int_data[4] = x2px(get_real(infile,0));break;/* dx1 */
		    case 5: int_data[5] = y2px(get_real(infile,0));break;/* dy1 */
		    case 6: int_data[6] = x2px(get_real(infile,0));break;/* dx2 */
		    case 7: int_data[7] = y2px(get_real(infile,0));break;/* dy2 */
		    case 8: URL = get_string(infile,1);
		    	    if( int_data[1] == -1 ){ int_data[10] = 1; }else{int_data[10] = 0; }/* resized / not resized */
			    /* flag error when wrong diagonal:  copyresized -1,-1,-1,-1,0,0,7,7,testfig.gif */
			    if( int_data[7] < int_data[5] || int_data[6] < int_data[4]){
		    		canvas_error("in copyresized,  use:<br>left top corner (dx1:dy1) and right bottom corner (dx2:dy2) ! ");
			    }
			    int_data[2] = abs(int_data[2] - int_data[0]);/* swidth */
			    int_data[3] = abs(int_data[3] - int_data[1]);/* sheight */
			    int_data[6] = abs(int_data[6] - int_data[4]);/* width */
			    int_data[7] = abs(int_data[7] - int_data[5]);/* height */
			    if( onclick == 0 ){ /* no mouse needed static image copy  */
			     if(js_function[DRAW_EXTERNAL_IMAGE] == 0){
			      fprintf(js_include_file,"var image_copy_canvas = create_canvas%d(%d,xsize,ysize);",canvas_root_id,STATIC_IMAGE_CANVAS);
			      js_function[DRAW_EXTERNAL_IMAGE] = 1;
			     }
			     string_length = 1 + snprintf(NULL,0,  "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],use_offset,int_data[10]);
			     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			     snprintf(tmp_buffer,string_length,    "draw_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],use_offset,int_data[10]);
			    }
			    else /* onclick or drag & drop external copy images */
			    {
			     js_function[DRAG_EXTERNAL_IMAGE] = 1;
			     string_length = 1 + snprintf(NULL,0,  "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]);
			     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			     snprintf(tmp_buffer,string_length,    "drag_external_image(\"%s\",%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d);\n",URL,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],onclick,object_cnt,use_offset,use_snap,int_data[10]);
			     object_cnt++;
			    }
			    add_to_buffer(tmp_buffer);
			    break;
		    default: break;
		}
	    }
	    reset();
	    break;

	case CROSSHAIR:
	/*
	@ crosshair x,y,color
	@ draw a single crosshair point at (x;y) in color ''color``
	@ use command <code>crosshairsize int</code> and / or <code>linewidth int</code> to adjust
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%crosshair%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 2%onclick%crosshair 0,0,red%linewidth 1%onclick%crosshair 1,1,blue%linewidth 3%onclick%crosshair 3,3,green%linewidth 4%xrosshair 4,4,orange
	*/
	    for(i=0;i<3;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: stroke_color = get_color(infile,1);/* name or hex color */
    			if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
    			if(use_affine == TRUE ){ transform(2,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
    			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.*f],[%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.*f],[%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);
    			if(onclick != 0){object_cnt++;}
    			/* object_cnt++ */
    			reset();
    			dragstuff[7] = 1;
    			break;
		    default:break;
		}
	    }
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case CROSSHAIRS:
	/*
	@ crosshairs color,x1,y1,x2,y2,...,x_n,y_n
	@ draw multiple crosshair points at given coordinates in color ''color``
	@ use command <code>crosshairsize int</code> and / or <code>linewidth int</code> to adjust
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	@%crosshairs_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%snaptogrid%linewidth 2%drag xy%crosshairs red,0,0,1,1,2,2,3,3%drag x%crosshairs blue,0,1,1,2,2,3,3,4
	@%crosshairs_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 2%onclick%crosshairs red,0,0,1,1,2,2,3,3%onclick%crosshairs blue,0,1,1,2,2,3,3,4
*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
    	    for(c=0 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.*f],[%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,7,[%.*f],[%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],crosshair_size,crosshair_size,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    dragstuff[7] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case CROSSHAIRSIZE:
	/*
	@ crosshairsize int
	@ default 8 (px)
	*/
	    crosshair_size = (int) (get_real(infile,1));
	    break;
	case CSS:
	/*
	@ css css_class
	@ may be used before any ''style-able`` html object (like inputfields or buttons) or some html objects that are generated by some canvasdraw commands
	@ in case of <a href="#multidraw">multidraw</a> this command must be a table css class, for example "wimstable"
	@%css%size 400,400%xrange -10,10%yrange -10,10%css wims_button_help%input 0,0,10,1,Hello
	*/
	    css_class = get_string(infile,1);
	    break;

	case CURSOR:
	/*
	@ cursor some CSS cursor_style
	@ alternative: pointer
	@ style can be any valid CSS property value
	@ choose from these types:<br>alias,all-scroll,auto,cell,context-menu,col-resize,copy,crosshair,default,e-resize,<br>ew-resize,grab,grabbing,help,move,n-resize,ne-resize,nesw-resize,ns-resize,nw-resize,<br>nwse-resize,no-drop,none,not-allowed,pointer,progress,row-resize,s-resize,se-resize,<br>sw-resize,text,url(myBall.cur),auto,vertical-text,w-resize,wait,zoom-in,zoom-out,initial
	@ note: wims will not check the validity of your cursor declaration
	@%cursor_css%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 3%drag xy%opacity 200,75%fcircles blue,-5,5,3,-4,-2,6,0,0,5,3,4,2,4,-5,4
	*/
	    fprintf(js_include_file,"canvas_div%d.style.cursor = \"%s\";",canvas_root_id,get_string(infile,1));
	    break;

	case CURVE:
	/*
	 @ curve color,formula(x)
	 @ alternative: plot
	 @ use command <a href="#trange">trange</a> in parametric functions before <b>every</b> command curve / plot <code>trange -pi,pi<br>curve color,formula1(t),formula2(t)</code><br>A next parametric curve will only be correctly plot when trange is set again !<br/>this is a design flaw and not a feature...
	 @ use command <a href="#precision">precision</a> to increase the number of digits of the plotted points
	 @ use command <a href="#plotsteps">plotsteps</a> to increase / decrease the amount of plotted points (default 150)
	 @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	 @ if you need a plot beyond xrange / yrange, use <a href="#jsplot">jsplot</a> (command ''curve`` will only calculate points within the xrange)
	 @%curve%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 1%grid 2,2,grey,2,2,6,grey%precision 1000%curve red,4*sqrt(x)%curve green,2*sqrt(abs(x)%curve blue,3*1/sqrt(x)%curve orange,4*sin(4/x)%dashed%curve red,4*cos(x)
	*/
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    if( use_parametric == TRUE ){ /* parametric color,fun1(t),fun2(t)*/
		use_parametric = FALSE;
		stroke_color = get_color(infile,0);
		char *fun1 = get_string_argument(infile,0);
		char *fun2 = get_string_argument(infile,1);
	        if( strlen(fun1) == 0 || strlen(fun2) == 0 ){canvas_error("parametric functions are NOT OK !");}
	        string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_parametric(xsize,ysize,fun1,fun2,xmin,xmax,ymin,ymax,tmin,tmax,plot_steps,precision,rotationcenter),2*line_width,2*line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	        snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_parametric(xsize,ysize,fun1,fun2,xmin,xmax,ymin,ymax,tmin,tmax,plot_steps,precision,rotationcenter),2*line_width,2*line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    	    }
	    else
	    {
		stroke_color = get_color(infile,0);
	        char *fun1 = get_string_argument(infile,1);
		if( strlen(fun1) == 0 ){canvas_error("function is NOT OK !");}
    		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,rotationcenter),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,9,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,rotationcenter),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
	    }
	    if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    dragstuff[9] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

    case CURVEDARROW:
    /*
    @ curvedarrow x1,y1,xc,yc,x2,y2,color
    @ draw a single headed curved arrow from (x1:y1) in direction of (xc:yc) to point (x2:y2)<br> note: the curve will <b>not go through</b> point (xc:yc)
    @ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
    @ use command <code>linewidth int</code> to adjust thickness of the arrow
    @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
    @%curvedarrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrow -5,0,0,10,5,0,blue
    @%curvedarrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrow -5,0,0,-10,5,0,blue%onclick%curvedarrow -8,0,0,5,8,3,green

h[0] = arrowhead
h[1] = type: 1 = single 2=double arrow
function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
    */
	for(i=0;i<7;i++){
	    switch(i){
	        case 0: double_data[0] = get_real(infile,0);break; /* x1 */
	        case 1: double_data[1] = get_real(infile,0);break; /* y1 */
	        case 2: double_data[2] = get_real(infile,0);break; /* xc */
	        case 3: double_data[3] = get_real(infile,0);break; /* yc */
	        case 4: double_data[4] = get_real(infile,0);break; /* y3 */
	        case 5: double_data[5] = get_real(infile,0);break; /* y3 */
	        case 6: stroke_color = get_color(infile,1);/* name or hex color */
	        if(use_rotate == TRUE ){rotate(6,angle,rotationcenter,2);}
	        if(use_affine == TRUE ){ transform(6,2);}
	        if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		decimals = find_number_of_digits(precision);
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	        check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    	        add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		reset();
	    break;
	    }
	}
	dragstuff[21] = 1;
	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	break;

    case CURVEDARROW2:
    /*
    @ curvedarrow2 x1,y1,xc,yc,x2,y2,color
    @ draw a double headed curved arrow from (x1:y1) in direction of (xc:yc) to point (x2:y2)<br> note: the curve will <b>not go through</b> point (xc:yc)
    @ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
    @ use command <code>linewidth int</code> to adjust thickness of the arrow
    @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
    @%curvedarrow_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrow2 -5,0,0,10,5,0,blue
    @%curvedarrow_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%cuvedarrow2 -5,0,0,-10,5,0,blue%onclick%curvedarrow -8,0,0,5,8,3,green

h[0] = arrowhead
h[1] = type: 1 = single 2=double arrow
function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
    */
	for(i=0;i<7;i++){
	    switch(i){
	        case 0: double_data[0] = get_real(infile,0);break; /* x1 */
	        case 1: double_data[1] = get_real(infile,0);break; /* y1 */
	        case 2: double_data[2] = get_real(infile,0);break; /* xc */
	        case 3: double_data[3] = get_real(infile,0);break; /* yc */
	        case 4: double_data[4] = get_real(infile,0);break; /* y3 */
	        case 5: double_data[5] = get_real(infile,0);break; /* y3 */
	        case 6: stroke_color = get_color(infile,1);/* name or hex color */
	        if(use_rotate == TRUE ){rotate(6,angle,rotationcenter,2);}
	        if(use_affine == TRUE ){ transform(6,2);}
		if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		decimals = find_number_of_digits(precision);
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}/* object_cnt++;*/
		dragstuff[21] = 1;
		if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		reset();
		break;
	    }
	}
	break;
    case CURVEDARROWS:
    /*
    @ curvedarrows color,x1,y1,xc,yc,x2,y2,...,x_(n-1),y_(n-1),xc,yc,x_n,y_n
    @ draw curved arrows from (x1:y1) in direction of (xc:yc) to point (x2:y2), etc<br> note: the curve will <b>not go through</b> point (xc:yc)
    @ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
    @ use command <code>linewidth int</code> to adjust thickness of the arrow
    @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
    @%curvedarrows_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrows red,-8,0,0,8,8,0,-5,5,0,-10,6,3
    @%curvedarrows_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrows red,-8,0,0,8,8,0,-5,5,0,-10,6,3

h[0] = arrowhead
h[1] = type: 1 = single 2=double arrow
function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
    */
        stroke_color = get_color(infile,0);/* name or hex color */
        i = 0;
        decimals = find_number_of_digits(precision);
        if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
        while( ! done ){
	 if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
	 double_data[0] = get_real(infile,0); /* x1 */
	 double_data[1] = get_real(infile,0); /* y1 */
	 double_data[2] = get_real(infile,0); /* xc */
	 double_data[3] = get_real(infile,0); /* yc */
	 double_data[4] = get_real(infile,0); /* x3 */
	 double_data[5] = get_real(infile,1); /* y3 */
	 string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	 check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	 snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,1,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	 add_to_buffer(tmp_buffer);
	 if(onclick != 0){object_cnt++;}
	 i = i + 6;
	}
	if(use_rotate == TRUE ){rotate(i-6,angle,rotationcenter,2);}
	if(use_affine == TRUE ){ transform(i-6,2);}
	dragstuff[21] = 1;
	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	reset();
	break;

    case CURVEDARROWS2:
    /*
    @ curvedarrows2 color,x1,y1,xc,yc,x2,y2,...x_(n-1),y_(n-1),xc,yc,x_n,y_n
    @ draw double headed curved arrows from (x1:y1) in direction of (xc:yc) to point (x2:y2), etc. <br> note: the curve will <b>not go through</b> point (xc:yc)
    @ use command <a href='#arrowhead'>arrowhead</a> to set the size of the arrow head.
    @ use command <code>linewidth int</code> to adjust thickness of the arrow
    @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
    @%curvedarrows2_drag%size 400,400%xrange -10,10%yrange -10,10%cursor move%linewidth 2%drag xy%curvedarrows2 red,-8,0,0,8,8,0,-5,5,0,-10,6,3
    @%curvedarrows2_click%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%%onclick%curvedarrow -5,0,0,-10,5,0,blue%onclick%curvedarrows2 red,-8,0,0,8,8,0,-5,5,0,-10,6,3

h[0] = arrowhead
h[1] = type: 1 = single 2=double arrow
function Shape(object_cnt,onclick,direction,type,x,y,w,h,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1,use_rotate,angle,text,font_size,font_family,use_slider,rotation_center,use_offset)
    */
        stroke_color = get_color(infile,0);/* name or hex color */
        i = 0;
        decimals = find_number_of_digits(precision);
	if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
        while( ! done ){
	 if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
	 double_data[0] = get_real(infile,0); /* x1 */
	 double_data[1] = get_real(infile,0); /* y1 */
	 double_data[2] = get_real(infile,0); /* xc */
	 double_data[3] = get_real(infile,0); /* yc */
	 double_data[4] = get_real(infile,0); /* x3 */
	 double_data[5] = get_real(infile,1); /* y3 */
	 string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	 check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	 snprintf(tmp_buffer,string_length,  "dragstuff.addShape(new Shape(%d,%d,%d,%d,21,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],arrow_head,arrow_head,arrow_head,2,line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	 add_to_buffer(tmp_buffer);
	 if(onclick != 0){object_cnt++;}
	 i = i + 6;
	}
	if(use_rotate == TRUE ){rotate(i-6,angle,rotationcenter,2);}
	if(use_affine == TRUE ){ transform(i-6,2);}
	dragstuff[21] = 1;
	if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	reset();
	break;

	case DASHED:
	/*
	@ dashed
	@ keyword (no arguments required)
	@ next object will be drawn with a dashed line
	@ change dashing scheme by using command <a href="#dashtype">dashtype</a>
	@%dashed%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%line -5,-5,-5,5,red%dashtype 1,1%dline -4,-5,-4,5,green%dashtype 2,2%dline -3,-5,-3,5,blue%dashtype 3,3%dline 0,-5,0,5,orange%dashtype 4,4%dline 3,-5,3,5,brown
	*/
	    use_dashed = TRUE;
	    break;

	case DASHTYPE:
	/*
	@ dashtype line_width_px,space_width_px
	@ every indiviual object may have its own dashtype, if needed...
	@ When keyword <a href='#dashed'>dashed</a> is set, the objects will be drawn with this dashtype
	@ default value <code>dashtype 2,2</code> e.g. 2px line and 2px space
	@ HTML5 canvas specification supports more arguments (dashing schemes) ... but not all modern browsers are yet capable
	@%dashtype%size 400,400%xrange -10,10%yrange -10,10%dashtype 1,1%dhline 0,9,red%dashtype 2,2%dhline 0,8,red%dashtype 4,4%dhline 0,7,red%dashtype 6,6%dhline 0,6,red%dashtype 8,8%dhline 0,5,red%dashtype 10,10%dhline 0,4,red%dashtype 1,2%dhline 0,3,red%dashtype 2,4%dhline 0,2,red%dashtype 3,6%dhline 0,1,red%dashtype 4,8%dhline 0,0,red%linewidth 2%dashtype 1,1%dhline 0,-9,red%dashtype 2,2%dhline 0,-8,red%dashtype 4,4%dhline 0,-7,red%dashtype 6,6%dhline 0,-6,red%dashtype 8,8%dhline 0,-5,red%dashtype 10,10%dhline 0,-4,red%dashtype 1,2%dhline 0,-3,red%dashtype 2,4%dhline 0,-2,red%dashtype 4,8%dhline 0,-1,red
	*/
	    for(i=0;i<2;i++){
		switch(i){
	    	    case 0 : dashtype[0] = (int) line_width*( get_real(infile,0)) ; break;
	    	    case 1 : dashtype[1] = (int) line_width*( get_real(infile,1)) ; break;
		}
	    }
	break;

	case DIAMONDFILL:
	/*
	@ diamondfill x0,y0,dx,dy,color
	@ x0,y0 in xrange / yrange
	@ distances dx,dy in pixels
	@ there is also a command <a href="#userdraw">userdraw diamondfill,color</a>
	@%diamondfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%circles red,-4,0,6,4,0,6%linewidth 1%diamondfill 0,0,5,8,blue%diamondfill 0,7,8,8,lightgreen
	*/
	    js_function[DRAW_DIAMONDFILL] = 1;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    decimals = find_number_of_digits(precision);
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x */
		    case 1: double_data[1] = get_real(infile,0); break; /* y  */
		    case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		    case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		    case 4: stroke_color = get_color(infile,1);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(2,2);}
		    /* draw_hatchfill(ctx,x0,y0,dx,dy,linewidth,color,opacity,xsize,ysize) */
		    string_length = 1 + snprintf(NULL,0,  "draw_diamondfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_diamondfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		    reset();
		    break;
		    default:break;
		}
	    }
	break;

	case DOTFILL:
	/*
	@ dotfill x0,y0,dx,dy,color
	@ x0,y0 in xrange / yrange
	@ distances dx,dy in pixels
	@ radius of dots is linewidth
	@ there is also a command <a href="#userdraw">userdraw dotfill,color</a>
	@%dotfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%circles red,-4,0,6,4,0,6%dotfill 0,0,5,8,blue%dotfill 0,7,8,8,lightgreen
	*/
	    js_function[DRAW_DOTFILL] = 1;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    decimals = find_number_of_digits(precision);
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x in px */
		    case 1: double_data[1] = get_real(infile,0); break; /* y in py */
		    case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		    case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		    case 4: stroke_color = get_color(infile,1);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(2,2);}
		    /* draw_dotfill(ctx,x0,y0,dx,dy,radius,color,opacity,xsize,ysize) */
		    string_length = 1 + snprintf(NULL,0,  "draw_dotfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_dotfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		    reset();
		    break;
		    default:break;
		}
	    }
	break;

	case DRAG:
	/*
	 @ drag [x][y][xy]
	 @ the next object will be draggable in x / y / xy direction
	 @ the displacement can be read by <code>javascript:read_dragdrop();</code>
	 @ the precision (default 2 decimals) in the student reply may be set with command <a href="#precision">precision</a>.<br>Use this 'precision' command before this command 'drag x|y|xy' !
	 @ <a href='#onclick'>onclick</a> and ''drag x|y|xy`` may be combined (for different objects: a single object can either be onclick or drag, not both )
	 @ ''multi_objects`` will be numbered in the given x/y-sequence (example: points red,0,0,1,1,2,2,3,3: point (0:0) is object_number 1)
	 @ <b>attention</b>: static objects and ''onclick/drag`` objects of the same type (like point,circle,etc) with the same coordinates (e.g. objects that overlap) will give problems in the ''recognition algorithm``) in this example<br> <code>linewidth 4<br>point 0,0,red<br>drag xy<br>point 0,0,blue</code><br>the red point will not be recognised as draggable ! in the example<br><code>linewidth 4<br>drag xy<br>point 0,0,red<br>drag xy<br>point 0,0,blue</code><br>both points will be recognised
	 @ the answer is: drag_or_onclick_object_number : Xorg : Yorg : Xnew : Ynew<br>wherein object_number is the sequence number of the draggable &amp; onclick objects in your script.<br>Only draggable & onclick objects will have an object_number (e.g things like point,crosshair,line,segment,circle,rect,triangle...etc)
	 @ use keyword <a href='#snaptogrid'>snaptogrid</a>, <a href='#xsnaptogrid'>xsnaptogrid</a>, <a href='#ysnaptogrid'>ysnaptogrid</a> or command <a href='#snaptopoints'>snaptopoints x1,y1,x2,y2,...</a> to switch from free to discrete movement
	 @ in case of external images (commands copy / copyresized) the external image can be set draggable ; always xy. <br>The function javascript;read_canvas() will return the xy-coordinates of all images.
	 @%drag_x%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag x%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
	 @%drag_y%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag y%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
	 @%drag_xy%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor lightblue%opacity 200,40%drag xy%linewidth 2%circles blue,-5,0,3,0,0,2,5,0,4,0,4,3,0,-3,4
	*/
	    temp = get_string(infile,1);
	    if(strstr(temp,"xy") != NULL ){
		drag_type = 0;
	    }
	    else
	    {
		if(strstr(temp,"x") != NULL ){
		    drag_type = 1;
		}
		else
	        {
	    	    drag_type = 2;
	        }
	    }
	    /* assuming all drag&drop coordinates the same precision: so set only once */
	    if( print_drag_params_only_once == FALSE ){
	     fprintf(js_include_file,"dragdrop_precision = %d;use_dragdrop_reply = true;",precision);
	     print_drag_params_only_once = TRUE;
	    }
	    onclick = 2;
	    /* if(use_userdraw == TRUE ){canvas_error("\"drag & drop\" may not be combined with \"userdraw\" or \"pan and zoom\" \n");} */
	    use_dragstuff = 2;
	    js_function[INTERACTIVE] = 1;
	    break;

	case ELLIPSE:
	/*
	@ ellipse xc,yc,width_x,height_y,color
	@ ellipses with center xc/yc and width/height in x/y-range etc (this differs from flydraw syntax!)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@ will shrink / expand on zoom out / zoom in
	@%ellipse%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%opacity 200,40%linewidth 3%drag xy%ellipse 0,0,6,4,green%zoom blue
	*/
	    for(i=0;i<5;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* rx -> px */
		    case 3:double_data[3] = get_real(infile,0);break; /* ry -> px */
		    case 4:stroke_color = get_color(infile,1);/* name or hex color */
		        if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,4);}
		        if(use_affine == TRUE ){ transform(2,4);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.*f],[%.*f],[%.*f],[%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.*f],[%.*f],[%.*f],[%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],decimals,double_data[2],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}/* object_cnt++; */
			dragstuff[3] = 1;
			if(use_dragstuff == 0 ){ use_dragstuff = 1; }
			reset();
		    break;
		}
	    }
	    break;

	case ELLIPSES:
	/*
	@ ellipses color,xc1,yc1,width_x1,height_y1,xc2,yc2,width_x2,height_y2,xc3,yc3,width_x3,height_y3,...
	@ ellipses with center and height in x/y-range etc (this differs from flydraw syntax!)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@ will shrink / expand on zoom out / zoom in
	@%ellipses%size 400,400%xrange -10,10%yrange -10,10%filled%fillcolor orange%opacity 200,40%linewidth 3%onclick%ellipses red,-3,0,2,4,0,0,4,2,3,0,6,2
	*/

	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=1;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		switch (i%4){
		 case 1:double_data[i-1] = get_real(infile,0);break; /* x */
		 case 2:double_data[i-1] = get_real(infile,0);break; /* y */
		 case 3:double_data[i-1] = get_real(infile,0);break; /* rx */
		 case 0:double_data[i-1] = get_real(infile,1);break; /* ry */
		 default: break;
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,4);}
	    if(use_affine == TRUE ){ transform(i-1,4);}
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
	     string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.*f],[%.*f],[%.*f],[%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+2],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	     snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,3,[%.*f],[%.*f],[%.*f],[%.*f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+2],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	     add_to_buffer(tmp_buffer);
	     if(onclick != 0){object_cnt++;} /* object_cnt++; */
	    }
	    reset();
	    dragstuff[3] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case FILLALL:
	/*
	@ fillall color,x1,y1,x2,y2...x_n,y_n
	@ fill all region containing points (x1:y1),(x2:y2)...(x_n:y_n) with color 'color'
	@ any other colors (objects) in the <a href="#canvastype">canvastype</a> will act as border to the bucket fill
	@ use this command after all boundary objects are declared.
	@ Use command 'userdraw clickfill,color' for user click driven flood fill.
	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
	@ note: the fill-family of commands are very (client) cpu intensive operations!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
	@%fillall%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%vlines black,-5,0,-5,0,-4,0,-4,0,3,0,3,0%hlines black,-5,0,-5,0,-5,4,-5,4,-5,-2,-5,-2%circles green,0,0,2,3,3,5,-5,-5,3%opacity 240,50%fillall blue,1,1,8,8,-8,-8
	*/
	    decimals = find_number_of_digits(precision);
	    fill_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    i=0;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		    string_length = 1 + snprintf(NULL,0,  "setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[i-1],decimals,double_data[i],fill_color,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[i-1],decimals,double_data[i],fill_color,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		}
		i++;
	    }
	break;

	case FILLED:
	/*
	@ filled
	@ keyword (no arguments required)
	@ the next ''fillable`` object (only the next !) will be filled
	@ use command <a href="#fillcolor">fillcolor color</a> to set fillcolor
	@ use <a href="#fillpattern">fillpattern</a> for non-solid color filling.
	@ use command <code>opacity 0-255,0-255</code> to set stroke and fill-opacity
	@ use command <a href='#fill'>fill x,y,color</a> or <a href="#floodfill">floodfill x,y,color</a> to fill the space around (x;y) with color <br>pixel operation implemented in javascript: use with care !
	*/
	    use_filled = 1;
	    break;

	case FILLCOLOR:
	/*
	@ fillcolor colorname or #hex
	@ set the color: mainly used for command 'userdraw obj,stroke_color'
	@ all fillable massive objects will have a fillcolor == strokecolor (just to be compatible with flydraw...)
	@ see <a href="#fillpattern">fillpattern</a> for non-solid color filling.
	*/
	    fill_color = get_color(infile,1);
	    break;

	case FILLPATTERN:
	/*
	@ fillpattern grid | hatch | diamond | dot | image_url
	@ alternative: settile image_url
	@ use a pattern as fillstyle
	@ suitable for all fillable object including the <a href="#userdraw">userdraw objects' family</a>
	@ note: do not use the ''f`` for a fillable object : this is used exclusively for solid colour filling.
	@ the fillcolor is set by the object command, for example:<br><code>size 370,370<br>xrange -5,5<br>yrange -5,5<br>opacity 165,150<br>fillpattern grid<br>fcircle -6,3,160,blue<br>fillpattern dot<br>fcircle -3,-3,160,red<br>fillpattern hatch<br>fcircle 0,3,160,green<br>filpattern diamond<br>fcircle 3,-3,160,cyan<br>userdraw dotfill,blue<br>zoom red</code>
	@ the pattern dimensions are hardcoded (linewidth, radius,dx,dy are fixed)
	@ the pattern color is set by command <a href='#fillcolor'>fillcolor</a> and <a href='#opacity'>opacity</a>
	@ see <a href="#fillcolor">fillcolor</a> for solid color filling.
	@ when using an image-url, make sure it contains an ''/`` in the filename...''fillpattern &#36;module_dir/gifs/test.jpg`` will fill the next fillable object with this image.|<br>the argument to html5 canvas routine 'createPattern(img,argument)' is set to ''repeat`` e.g. if the image is smaller then the canvas, multiple copies will be used to fill the area ( e.g. ctx.fillStyle() = pattern)<br>for example:<br><code>size 150,150<br>xrange -5,5<br>yrange -5,5<br>drag xy<br>fillpattern gifs/en.gif<br>fcircle 0,0,100,red<br>fillpattern gifs/nl.gif<br>drag xy<br>fcircle -3,2,100,green<br>fillpattern gifs/cn.gif<br>drag xy<br>fcircle 3,2,100,green</code>
	@ fillpattern is also active for <a href="#userdraw">userdraw object,color</a>...<br>the userdraw family a has also ''clickfill type`` (e.g. an object gets filled between boundaries, when clicked) commands like:<br>'userdraw dotfill,color'<br>'userdraw hatchfill,color' etc
	@%fillpattern_1%size 400,400%xrange -5,5%yrange -5,5%opacity 165,150%fillpattern grid%circle -6,3,160,blue%fillpattern dot%circle -3,-3,160,red%fillpattern hatch%circle 0,3,160,green%filpattern diamond%circle 3,-3,160,cyan%zoom red
	@%fillpattern_2%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%fillcolor green%fillpattern hatch%#fillpattern dot,diamond,grid,imageurl%userdraw circle,red
	*/
	    temp = get_string(infile,1);
	    use_filled = 0;
	    js_function[DRAW_FILL_PATTERN] = 1;
	    if( strstr(temp,"grid") != 0 ){ use_filled = 2;}
	     else{
	     if( strstr(temp,"hatch") != 0 ){ use_filled = 3;}
	      else{
	      if( strstr(temp,"diamond") != 0 ){ use_filled = 4;}
	       else{
	       if( strstr(temp,"dot") != 0 ){ use_filled = 5;}
	        else{
	        if( strstr(temp,"/") != 0 ){ /* get_image_from_url() needs to be called after function definition...*/
	         use_filled = 6;js_function[JS_LOAD_IMAGE] = 1;
	         string_length = 1 + snprintf(NULL,0,"get_image_from_url(\"%s\");",temp);
	         check_string_length(string_length);
	         tmp_buffer = my_newmem(string_length);
	         snprintf(tmp_buffer,string_length,"get_image_from_url(\"%s\");",temp);
	         add_to_buffer(tmp_buffer);
	        }
	       }
	      }
	     }
	    }
	    if( use_filled == 0 ){canvas_error("fillpattern unknown or typo...choose grid,hatch,diamond of dot...");}
	    break;
	case FILLTOBORDER:
	/*
	@ filltoborder x,y,bordercolor,color
	@ fill the region of point (x:y) with color 'color'
	@ any other color will not act as border to the bucket fill
	@ use this command after all boundary objects are declared.
	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
	@ note: filltoborder is a very (client) cpu intensive operation!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
	@ maybe used together with command <a href="#userdraw">userdraw clickfill,color</a>
	@%filltoborder%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%filltoborder 6,6,blue,blue%filltoborder 6,-6,blue,red
	*/
	    for(i=0 ;i < 4 ; i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break;
		    case 1:double_data[1] = get_real(infile,0);break;
		    case 2:bgcolor = get_color(infile,0);break;
		    case 3:fill_color = get_color(infile,1);
			   if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
			    js_function[DRAW_FILLTOBORDER] = 1;
			    add_js_filltoborder(canvas_type);
			   }
			   decimals = find_number_of_digits(precision);
			   /* we need to set a timeout: the canvas is not yet draw in memory? when floodfill is called directly... */
			   string_length = 1 + snprintf(NULL,0,  "setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[0],decimals,double_data[1],bgcolor,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
			   check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			   snprintf(tmp_buffer,string_length,"setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[0],decimals,double_data[1],bgcolor,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
			   add_to_buffer(tmp_buffer);
			   fill_cnt++;
			   reset();
			   break;
		    default:break;
		}
	    }
	break;
	case FLOODFILL:
	/*
	@ floodfill x,y,color
	@ alternative: fill
	@ fill the region of point (x:y) with color 'color'
	@ any other color or size of picture (borders of picture) will act as border to the bucket fill
	@ use this command after all boundary objects are declared.
	@ Use command <code>userdraw clickfill,color</code> for user click driven flood fill.
	@ use command <a href="#canvastype">canvastype </a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)
	@ note: floodfill is a very (client) cpu intensive operation!<br>filling is done pixel by pixel e.g. image size of 400x400 uses 160000 pixels: each pixel contains 4 data (R,G,B,Opacity) = 640000 data.<br>on every data a few operations / comparisons are done...<br>So have pity on your students CPU..
	@%floodfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%floodfill 6,6,blue%floodfill 6,-6,red
	*/
	    for(i=0 ;i < 4 ; i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break;
		    case 1:double_data[1] = get_real(infile,0);break;
		    case 2:fill_color = get_color(infile,1);
			   if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
			    js_function[DRAW_FILLTOBORDER] = 1;
			    add_js_filltoborder(canvas_type);
			   }
			   decimals = find_number_of_digits(precision);
			   /* we need to set a timeout: the canvas is not yet draw in memory? when floodfill is called directly... */
			   string_length = 1 + snprintf(NULL,0,  "setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[0],decimals,double_data[1],fill_color,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
			   check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			   snprintf(tmp_buffer,string_length,"setTimeout(function(){filltoborder(%.*f,%.*f,[%s,%d],[%s,%d],%d,false,null);},1000);\n",decimals,double_data[0],decimals,double_data[1],fill_color,(int) (fill_opacity/0.0039215),fill_color,(int) (fill_opacity/0.0039215),FILL_CANVAS+fill_cnt);
			   add_to_buffer(tmp_buffer);
			   fill_cnt++;
			   break;
		    default:break;
		}
	    }
	    reset();
	break;

	case FONTCOLOR:
	/*
	 @ fontcolor color
	 @ color: hexcolor or colorname
	 @ default: black
	 @ use command <a href="#fontfamily">fontfamily</a> to deviate from default font type
	 @%fontcolor%size 400,400%xrange -10,10%yrange -10,10%fontcolor red%#note: use command fontfamily to change size and shape%axis%axisnumbering%grid 2,2,grey,2,2,4,grey
	*/
	    font_color = get_color(infile,1);
	    break;

	case FONTFAMILY:
	/*
	 @ fontfamily font_description
	 @ set the font family; for browsers that support it
	 @ font_description: Arial, Courier, Helvetica etc
	 @ in case commands <code>string color,x,y,the string</code>, <code>stringup color,x,y,rotation,the string</code>, ''fontfamily`` can be something like:<code>fontfamily italic 34pt Arial</code>. Use correct syntax: ''font style``, ''font size pt``, ''fontfamily``
	 @%fontfamily%size 400,400%xrange -10,10%yrange -10,10	%fontfamily Bold 10pt Arial%string blue,-9,9,10 pt Arial%fontfamily Italic 20pt Arial%string blue,0,9,20 pt Arial%fontfamily Bold 10pt Helvetica%string blue,-9,5,10 pt Helvetica%fontfamily Italic 20pt Helvetica%string blue,0,5,20 pt Helvetica %fontfamily Bold 10pt Courier%string blue,-9,0,10 pt Courier%fontfamily Italic 20pt Courier%string blue,0,0,20 pt Courier%fontfamily Bold 10pt Fixed%string blue,-9,-5,10 pt Fixed%fontfamily Italic 20pt Fixed%string blue,0,-5,20 pt Fixed %fontfamily Bold 10pt Times%string blue,-9,-9,10 pt Times%fontfamily Italic 20pt Times%string blue,0,-9,20 pt Times

	*/
	    font_family = get_string(infile,1);
	    break;

	case FONTSIZE:
	/*
	 @ fontsize font_size
	 @ default value 12
	 @ note: for some macros (like ''grid | legend | xaxistext | xlabel`` etc) sometimes command <a href="#fontfamily">fontfamily</a> can be used for some specific font-setting<br>this is however not always very straight forward... so just try and see what happens
	*/
	    font_size = (int) (get_real(infile,1));
	    break;

	case FUNCTION_LABEL:
	/*
	 @ functionlabel label_1:label_2:label_3...
	 @ alternative: functionlabels
	 @ default value ''f(x)=:g(x)=:h(x)=:i(x)=:j(x)=:k(x)=:m(x)=:n(x)=``
	 @ no mathml allowed (just ascii string)
	 @ use command <a href='#fontsize'>fontsize int</a> to adjust the size
	 @ use command <a href='#strokecolor'>strokecolor colorname</a> to adjust the labels (individually, if needed)
	 @ if needed, use before every command <a href='#userinput'>userinput function | inputfield | textarea</a>
	 @ no limit in amount of inputfields for userbased function plotting
	 @%function_label%size 400,400%xrange -5,5%yrange -5,5%precision 0%axis%axisnumbering%opacity 100,190%grid 1,1,grey,2,2,5,black%linewidth 3%linewidth 1%precision 1000%functionlabels F(x)=:H(x)=:Yield(x)=%strokecolor green%userinput function%strokecolor red%userinput function%strokecolor blue%userinput function
	*/
	    temp = get_string_argument(infile,1);
	    function_label = list2js_array(temp,":");

	    break;

	case GRID:/* xmajor,ymajor,gridcolor [,xminor,yminor,tick length (px), axis/tickscolor]*/
	/*
	 @ grid step_x,step_y,gridcolor
	 @ if keywords <a href="#axis">axis</a> or <a href="#axisnumbering">axisnumbering</a> are set, use: <code>grid step_x,step_y,major_color,minor_x,minor_y,tics height in px,axis_color</code> minor x step = step_x / minor_x
	 @ in that case, use command <a href="#fontcolor">fontcolor</a>, <a href="#fontsize">fontsize</a> and / or <a href="#fontfamily">fontfamily</a> to adjust font; defaults: black,12,Arial
	 @ if xmin > 0 and/or ymin > 0 and zooming / panning is not active: be aware that the x/y-axis numbering and x/y major/minor tic marks will not be visual as they are placed under the x-axis and left to the y-axis (in Quadrant II and IV)
	 @ can <b>not</b> be set <a href="#onclick">onclick</a> or <a href="#drag">drag xy</a>
	 @ use commands <a href="#xlabel">xlabel some_string</a> and/or <a href="#ylabel">ylabel some_string</a> to label axis; use command ''fontsize`` to adjust size: the font family is non-configurable 'italic your_fontsize px Arial' !
	 @ see commands <a href="#xaxis">xaxis or xaxistext</a>, <a href="#yaxis">yaxis or yaxistext</a> to set tailormade values on axis (the used font is set by command <a href="#fontfamily">fontfamily</a>; default '12px Arial')
	 @ see command <a href="#legend">legend</a> to set a legend for the graph; use command <a href="#fontsize">fontsize</a> to adjust size (the font family is non-configurable 'bold your_fontsize px Arial')
	 @%grid%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%zoom red
	 @%grid_axis%size 400,400%xrange -10,10%yrange -10,10%axis%grid 1,1,grey,2,2,6,black%zoom red
	 @%grid_axis_axisnumbering%size 400,400%xrange -10,10%yrange -10,10%fontfamily Italic 14px Courier%axis%axisnumbering%precision 0%grid 1,1,grey,2,2,6,black%zoom red
	*/
	    if( js_function[DRAW_YLOGSCALE] == 1 ){canvas_error("only one grid type is allowed...");}
	    js_function[DRAW_GRID] = 1;
	    for(i=0;i<4;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break;/* xmajor */
		    case 1:double_data[1] = get_real(infile,0);break;/* ymajor */
		    case 2:
		    if( use_axis == TRUE ){
			stroke_color = get_color(infile,0);
			done = FALSE;
			int_data[0] = (int) (get_real(infile,0));/* xminor */
			int_data[1] = (int) (get_real(infile,0));/* yminor */
			int_data[2] = (int) (get_real(infile,0));/* tic_length */
			fill_color = get_color(infile,1); /* used as axis_color*/
		    }
		    else
		    {
			int_data[0] = 1;
			int_data[1] = 1;
			stroke_color = get_color(infile,1);
			fill_color = stroke_color;
		    }
		    if( double_data[0] <= 0 ||  double_data[1] <= 0 ||  int_data[0] <= 0 ||  int_data[1] <= 0 ){canvas_error("major or minor ticks must be positive !");}
		    /* set snap_x snap_y values in pixels */
		    fprintf(js_include_file,"snap_x = %f;snap_y = %f;",double_data[0] / int_data[0],double_data[1] / int_data[1]);
		    fprintf(js_include_file,"\n/* add grid */function redraw_grid(){draw_grid%d(%d,%d,%.2f,%.*f,%.*f,%d,%d,%d,%d,\"%s\",\"%s\",%d,\"%s\",%d,%d,%d,%d,%d,\"%s\",%.2f);return;};",canvas_root_id,GRID_CANVAS,precision,stroke_opacity,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],int_data[2],line_width,stroke_color,fill_color,font_size,font_family,use_axis,use_axis_numbering,use_dashed,dashtype[0],dashtype[1],font_color,fill_opacity);
		    string_length = 1 + snprintf(NULL,0,  "redraw_grid();\n");
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,    "redraw_grid();\n");
		    add_to_buffer(tmp_buffer);
		    break;
		}
	    }
	    reset();
	    break;
	case GRIDFILL:
	/*
	@ gridfill x0,y0,dx,dy,color
	@ x0,y0 in xrange / yrange
	@ distances dx,dy in pixels
	@ there is also a command <a href="#userdraw">userdraw gridfill,color</a>
	@%gridfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%gridfill 6,6,10,10,blue%gridfill 6,-6,6,6,red

	*/
	    js_function[DRAW_GRIDFILL] = 1;
	    decimals = find_number_of_digits(precision);
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x  */
		    case 1: double_data[1] = get_real(infile,0); break; /* y  */
		    case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		    case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		    case 4: stroke_color = get_color(infile,1);
		    string_length = 1 + snprintf(NULL,0,  "draw_gridfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_gridfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		    reset();
		    break;
		    default:break;
		}
	    }
	break;

	case GROUP:
	/*
	 @ group
	 @ keyword
	 @ work in 'progress'
	 @ all objects(*) after the command and until <a href="#kill">kill group</a> or <a href="#killslider">killslider</a> may be moved together with mouse moverments<br> (*) for now all real canvas objects and latex / xml ; but no images (work in progress)
	 @ may be combined with slider driven movements or drag & drop
	 @%group%%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%linewidth 4%rotationcenter 0,0%slider -2*pi,2*pi,300,40,angle active,rotate%snaptogrid%ftriangle 0,-4,-2,-2,4,--5,blue%fillcolor red%fcircle -4.4,4.4,40,blue%kill slider%slider -20,20,300,40,x active,x-slide%ftriangle -2,0,0,4,2,0,green%fcircle 4.4,4.5,40,red%kill slider%slider -20,20,300,40,y active,y-slide%fcircle 4,-4,40,green%linewidth 4%fcircle -4,-4,40,orange%kill slider%group%fcircle -4.4,4.5,10,blue%fcircle -5.4,4.5,10,blue%fcircle -6.4,4.5,10,blue%fcircle -4.4,8,16,green%fcircle -5.4,8,16,green%fcircle -6.4,8,16,green%mouse red,22%zoom red
	*/
	    use_slider++;
	    add_slider(2);
	    no_reset = TRUE;
	    int c = 0;
	    for(i=last_slider;i<=use_slider;i++){ int_data[c] = i; c++; }
	    my_sliders = data2js_array(int_data,use_slider - last_slider+1);
	    if( precision == 0 ){precision = 100;}
	    onclick = 5;
	    use_dragstuff = 2;
	    drag_type = 0;
	    js_function[INTERACTIVE] = 1;
	    fprintf(js_include_file,"var slider%d;dragdrop_precision = %d;use_dragdrop_reply = true;",use_slider,precision);
	    string_length = 1 + snprintf(NULL,0,"slider%d = new move_group(%d);\n",use_slider,use_slider);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,"slider%d = new move_group(%d);\n",use_slider,use_slider);
	    add_to_buffer(tmp_buffer);
	break;

	case HALFLINE:
	/*
	@ demiline x1,y1,x2,y2,color
	@ alternative: halfline
	@ draws a halfline starting in (x1:y1) and through (x2:y2) in color 'color' (colorname or hex)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%halfline%size 400,400%xrange -10,10%yrange -10,10%halfline -5,5,0,0,red%halfline -5,-5,0,0,blue
	*/
	for(i=0; i<13;i++){double_data[i]=0;}

	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0]= get_real(infile,0);break; /* x-values */
		    case 1: double_data[1]= get_real(infile,0);break; /* y-values */
		    case 2: double_data[10]= get_real(infile,0);break; /* x-values */
		    case 3: double_data[11]= get_real(infile,0);break; /* y-values */
		    case 4: stroke_color=get_color(infile,1);/* name or hex color */
		    if(double_data[0] == double_data[10]){ /* vertical halfline */
			if(double_data[1] < double_data[11]){
			 double_data[3] = ymax + 1000;
			}
			else
			{
			 double_data[3] = ymin - 1000;
			}
			double_data[2] = double_data[0];
		    }
		    else
		    { /* horizontal halfline*/
		     if( double_data[1] == double_data[11] ){
		      if( double_data[0] < double_data[10] ){
		        double_data[2] = xmax + 1000; /* halfline to the right */
		      }
		      else
		      {
		        double_data[2] = xmin - 1000; /* halfline to the left */
		      }
		      double_data[3] = double_data[1];
		     }
		     else
		     {
		      /* any other halfline */
		      /* slope */
		      double_data[12] = (double_data[11] - double_data[1])/(double_data[10] - double_data[0]);
		      /* const */
		      double_data[13] = double_data[1] - double_data[12]*double_data[0];
		      if( double_data[0] < double_data[10] ){
		       double_data[2] = double_data[2] + 1000;
		      }
		      else
		      {
		       double_data[2] = double_data[2] - 1000;
		      }
		      double_data[3] = double_data[12]*double_data[2] + double_data[13];
		     }
		    }
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		    if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(4,2);}
		    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		    add_to_buffer(tmp_buffer);
    		    if(onclick != 0){object_cnt++;}
		    /* object_cnt++; */
		    reset();
		    break;
		}
	    }
	    dragstuff[18] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case HALFLINES:
	/*
	@ demilines color,x1,y1,x2,y2,....
	@ alternative: halflines
	@ draws halflines starting in (x1:y1) and through (x2:y2) in color 'color' (colorname or hex) etc
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> indiviually
	@%halflines%size 400,400%xrange -10,10%yrange -10,10%halflines red,-5,5,0,0,-5,-5,0,0
	*/
	    stroke_color=get_color(infile,0);
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		if( double_data[c] == double_data[c+2] ){ /* vertical line*/
		    if(double_data[c+1] < double_data[c+3]){ /* upright halfline */
			double_data[c+3] = ymax + 1000;
		    }
		    else
		    {
		     double_data[c+3] = ymin - 1000;/* descending halfline */
		    }
		}
		else
		{
		    if( double_data[c+1] == double_data[c+3] ){ /* horizontal line */
		        if(double_data[c] < double_data[c+2] ){ /* halfline to the right */
		    	    double_data[c+2] = xmax+100;
		    	}
		    	else
		    	{
		    	    double_data[c+2] = xmin-1000; /* halfline to the right */
		    	}
		    }
		    else
		    {
			/* m */
			double m = (double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]);
			/* q */
			double q = double_data[c+1] - ((double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]))*double_data[c];
			if(double_data[c] < double_data[c+2]){ /* to the right */
			    double_data[c+2] = xmax+1000; /* 1000 is needed for dragging...otherwise it is just segment */
			    double_data[c+3] = (m)*(double_data[c+2])+(q);
			}
			else
			{ /* to the left */
			    double_data[c+2] = xmin - 1000;
			    double_data[c+3] = (m)*(double_data[c+2])+(q);
			}
		    }
		}
		if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		if(use_affine == TRUE ){ transform(i-1,2);}
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,18,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    reset();
	    dragstuff[18] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case HATCHFILL:
	/*
	@ hatchfill x0,y0,dx,dy,color
	@ x0,y0 in xrange / yrange
	@ distances dx,dy in pixels
	@ there is also a command <a href="#userdraw">userdraw hatchfill,color</a>
	@%hatchfill%size 400,400%xrange -10,10%yrange -10,10%canvastype 100%linewidth 2%precision 1000%jsplot blue,5*sin(x)%opacity 200,50%hatchfill 6,6,10,10,blue%hatchfill 6,-6,6,6,red
	*/
	    js_function[DRAW_HATCHFILL] = 1;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    decimals = find_number_of_digits(precision);
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x */
		    case 1: double_data[1] = get_real(infile,0); break; /* y  */
		    case 2: int_data[0] = (int) (get_real(infile,0)); break; /* dx pixel */
		    case 3: int_data[1] = (int) (get_real(infile,0)); break; /* dy pixel*/
		    case 4: stroke_color = get_color(infile,1);
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(2,2);}
		    /* draw_hatchfill(ctx,x0,y0,dx,dy,linewidth,color,opacity,xsize,ysize) */
		    string_length = 1 + snprintf(NULL,0,  "draw_hatchfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_hatchfill(%d,%.*f,%.*f,%d,%d,%d,\"%s\",%.2f,%d,%d);\n",STATIC_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],int_data[0],int_data[1],line_width,stroke_color,stroke_opacity,xsize,ysize);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		    reset();
		    break;
		    default:break;
		}
	    }
	break;

	case HLINE:
	/*
	@ hline x,y,color
	@ alternative: horizontalline
	@ draw a horizontal line through point (x:y) in color 'color'
	@ or use command <a href='#curve'>curve color,formula</a> to draw the line (uses more points to draw the line; is however better draggable)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%hline%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%hline 0,0,red%dhline 0,5,blue
	*/
	    for(i=0;i<3;i++) {
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1: double_data[1] = get_real(infile,0);break; /* y-values */
		    case 2: stroke_color = get_color(infile,1);/* name or hex color */
		    double_data[3] = double_data[1];
		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(2,2);}
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		    decimals = find_number_of_digits(precision);
		    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,100*xmin,decimals,100*xmax,decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,100*xmin,decimals,100*xmax,decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		    add_to_buffer(tmp_buffer);
    		    if(onclick != 0){object_cnt++;}/* object_cnt++; */
    		    dragstuff[4] = 1;
    		    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
		    reset();
		    break;
		}
	    }
	    break;

	case HLINES:
	/*
	@ hlines color,x1,y1,x2,y2,...
	@ alternative: horizontallines
	@ draw horizontal lines through points (x1:y1)...(xn:yn) in color 'color'
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%hlines%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%hlines red,0,0,0,5,0,-5
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,xmin,decimals,xmax,decimals,double_data[c+1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,xmin,decimals,xmax,decimals,double_data[c+1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		if(onclick != 0){object_cnt++;}/* object_cnt++; */
	    }
	    reset();
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case HTTP:
	/*
	 @ http x1,y1,x2,y2,http://some_adress.com
	 @ an active html-page will be displayed in an "iframe" rectangle left top (x1:y1), right bottom (x2:y2)
	 @ do not use interactivity (or mouse) if the mouse needs to be active in the iframe
	 @ can <b>not</b> be ''set onclick`` or ''drag xy``
	 @%http%size 400,400%xrange -10,10%yrange -10,10%http 0,10,10,0,http://wims.unice.fr%opacity 200,50%drag xy%fcircle 0,0,100,green
	*/
	    js_function[DRAW_HTTP] = 1;
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: int_data[0]=x2px(get_real(infile,0));break; /* x in x/y-range coord system -> pixel width */
		    case 1: int_data[1]=y2px(get_real(infile,0));break; /* y in x/y-range coord system  -> pixel height */
		    case 2: int_data[2]=x2px(get_real(infile,0)) - int_data[0];break; /* width in x/y-range coord system -> pixel width */
		    case 3: int_data[3]=y2px(get_real(infile,0)) - int_data[1];break; /* height in x/y-range coord system  -> pixel height */
		    case 4: decimals = find_number_of_digits(precision);
			    temp = get_string(infile,1);
			    if(strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'");}
			    string_length = 1 + snprintf(NULL,0,"draw_http(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length+2);
			    snprintf(tmp_buffer,string_length,"draw_http(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp);
			    add_to_buffer(tmp_buffer);
		    break;
		}
	    }
	    reset();
	    break;
	case HTML:
	/*
	 @ html x1,y1,html_string
	 @ all tags are allowed, html code using inputfields could be read using your own javascript code. Do not use ids like 'canvas_input0' etc.
	 @ can be set <a href='#onclick'>onclick</a>  and <a href='#drag'>drag&amp;drop</a>
	 @ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
	 @ command <a href='#rotate'>rotate</a> will rotate the object
	 @ use keyword <a href='#centered'>centered</a> to center the html object on (x1:y1)
	 @ note: using drag&amp;drop for all external P,SPAN,DIV,IMG,SVG-images onto a canvasdraw element, use ''onclick=javascript:place_image_on_canvas(this.id)``
	 @ note: sub &amp; sup are supported in command family <a href='#string'>string</a>, e.g. real internal canvas objects !
	 @%html-text%size 500,500%xrange -10,10%yrange -10,10%drag xy%centered%fillcolor lightblue%html 2,2,<h1 style='color:red'>DRAG ME</h1> %opacity 200,50%drag xy%fcircle 0,0,100,green
	 @%html-image-slider%size 500,500%xrange -10,10%yrange -10,10%fontsize 42%rotationcenter 0,0%centered%html 0,0,<img src="http://85.148.206.56/gifs/can1.gif">%slider 0,pi,400,40,angle active degree, %centered%html 0,0,<img src="http://85.148.206.56/gifs/can2.gif">
	*/
	    js_function[DRAW_XML] = 1;
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break;
		    case 1: double_data[1] = get_real(infile,0);break;
		    case 4: decimals = find_number_of_digits(precision);
			    if(use_affine == TRUE ){ transform(2,2);}/* needs double_data[] */
			    if( use_offset != 0 || drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
			    int_data[0] = x2px(double_data[0]);/* needs px */
			    int_data[1] = y2px(double_data[1]);
			    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			    if( use_slider != -1 && drag_type != -1){ onclick = 5; }
			    temp = get_string(infile,1);
			    if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","\\\""); }
			    if( strstr(temp,"<img ")!= 0){URL="image";}else{URL="html";}
			    string_length = 1 + snprintf(NULL,0,"var draw_xml%d = {id:%d,type:'%s',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,URL,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,  "var draw_xml%d = {id:%d,type:'%s',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,URL,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt);
			    add_to_buffer(tmp_buffer);
			    if(onclick != 0 ){object_cnt++;}
			    drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
			    break;
		    default:break;
		}
	    }
	    reset();
	    break;

	case IMAGEFILL:
	/*
	@ imagefill x,y,scaling to xsize &times; ysize?,image_url
	@ The next suitable <b>filled object</b> will be filled with "image_url" tiled
	@ scaling to xsize &times; ysize ? ... 1 = yes 0 = no
	@ After pattern filling, the fill-color should be reset !
	@ wims getins / image from class directory: imagefill 80,80,my_image.gif
	@ normal url: imagefill 80,80,0,&#36;module_dir/gifs/my_image.gif
	@ normal url: imagefill 80,80,1,http://adres/a/b/c/my_image.jpg
	@ if dx,dy is larger than the image, the whole image will be background to the next object.
	@%imagefill_tile%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,5,3,2,5%imagefill 1.5,1.5,0,gifs/en.gif%imagefill -5,5,0,gifs/logo/wimsedu.png
	@%imagefill_scale%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,5,3,2,5%imagefill 1.5,1.5,1,gifs/en.gif%imagefill -5,5,1,gifs/logo/wimsedu.png
	*/
	    js_function[DRAW_IMAGEFILL] = 1;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    for(i=0 ;i < 4 ; i++){
		switch(i){
		    case 0:int_data[0] = (int) (get_real(infile,0));break;
		    case 1:int_data[1] = (int) (get_real(infile,0));break;
		    case 2:int_data[2] = (int) (get_real(infile,0));break; /* 0 | 1 */
		    case 3: URL = get_string_argument(infile,1);
			    string_length = 1 + snprintf(NULL,0,  "draw_imagefill(%d,%d,%d,\"%s\",%d,%d,%d,%d);\n",STATIC_CANVAS+fill_cnt,int_data[0],int_data[1],URL,xsize,ysize,use_userdraw,int_data[2]);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_imagefill(%d,%d,%d,\"%s\",%d,%d,%d,%d);\n",STATIC_CANVAS+fill_cnt,int_data[0],int_data[1],URL,xsize,ysize,use_userdraw,int_data[2]);
			    add_to_buffer(tmp_buffer);
			    fill_cnt++;
		    break;
		}
	    }
	    reset();
	break;

	case IMAGEPALETTE:
	/*
	 @ imagepalette image1,image2,image3,...
	 @ if used before and together with command <a href='#multidraw'>multidraw images,..,..., etc</a> the image will be presented in a small table in the ''control panel``.
	 @%imagepalette%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%copy 0,0,-1,-1,-1,-1,gifs/images/skull_and_crossbones50.png%fontcolor green%fontfamily Bold 42pt Arial%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multiuserinput 0,0,1%css color:blue;%multisnaptogrid 1,1,1%multilinewidth 0,4,0%# attention: use unicode text input without the slash %# \u222D ---> u222D at least will sometimes work%# otherwise cut&past unicode symbols into inputfield...%multilabel TEXT,REACTION ARROW,FLAGS,STOP DRAWING%multidraw text,arrow,images
	 */
	   temp = get_string(infile,1);
	   temp = str_replace(temp,",","\",\"");
	    if( use_tooltip == 1 ){canvas_error("command 'imagepalette' is incompatible with command 'intooltip tip_text',as they use the same div-element ");}
	    fprintf(js_include_file,"\nvar current_id;var imagepalette = [\" %s \"];\n",temp);
	break;

	case INPUT:
	/*
	 @ input x,y,size,editable,value
	 @ to set inputfield "readonly", use editable = 0
	 @ if no preset 'value' is needed...use a 'space' as last item argument
	 @ only active inputfields (editable = 1) will be read with read_canvas();
	 @ if ''&#36;status=done`` (e.g. in answer.phtml) the inputfield will be cleared and set readonly<br>override this by keyword <a href="#status">status</a>
	 @ may be further controlled by <a href="#css">css</a>
	 @ if mathml inputfields are present and / or some userdraw is performed, these data will <b>not</b> be send as well (javascript:read_canvas();)
	 @ use keyword <a href='#xoffset'>xoffset | centered</a> if the inputfield should be centered on (x:y)<br> default is the left top corner is (x:y)
	 @ if the student must place an inputfield(s) somewhere on the canvas, use command <a href="#userdraw">userdraw input,color</a> or make use of a command like <a href="#userdraw">userdraw text,color</a>
	 @%input%size 400,400%xrange -10,10%yrange -10,10%linewidth 6%point 1,2,red%input 1,2,5,1, ?%point -5,5,red%input -5,5,5,1, ?%point 6,-5,red%input 6,-5,5,1, ?%point -5,-8,red%input -5,-8,5,1, ?
	*/
	js_function[DRAW_INPUTS] = 1;
	    for(i = 0 ; i<5;i++){
		switch(i){
		    case 0: int_data[0]=x2px(get_real(infile,0));break;/* x in px */
		    case 1: int_data[1]=y2px(get_real(infile,0));break;/* y in px */
		    case 2: int_data[2]=abs( (int)(get_real(infile,0)));break; /* size */
		    case 3: if( get_real(infile,1) >0){int_data[3] = 1;}else{int_data[3] = 0;};break; /* readonly */
		    case 4: temp = get_string(infile,3);
			    string_length = 1 + snprintf(NULL,0,  "draw_static_inputs(%d,%d,%d,%d,%d,%d,\"%s\",\"%s\",%d);\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],css_class,temp,use_offset);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_static_inputs(%d,%d,%d,%d,%d,%d,\"%s\",\"%s\",%d);\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],css_class,temp,use_offset);
			    add_to_buffer(tmp_buffer);
			    input_cnt++;break;
		    default: break;
		}
	    }
	    if(reply_format == 0 ){reply_format = 15;}
	    reset();
	    break;

	case INTOOLTIP:
	    /*
	    @ intooltip link_text
	    @ link_text is a single line (span-element)
	    @ link_text may also be an image URL ''http://some_server/images/my_image.png`` or ''&#36;module_dir/gifs/my_image.jpg``
	    @ link_text may contain HTML markup
	    @ the canvas will be displayed in a tooltip on ''link_text``
	    @ the canvas is default transparent: use command <a href="#bgcolor">bgcolor color</a> to adjust background-color, the link text will also be shown with this 'bgcolor'.
	    @ many ''userinput stuff`` will use the tooltip_placeholder_div element...only one is defined in the wims-page<br>and are therefore these commands are mutually exclusive.<br>keep this in mind...
	    @%intooltip%size 400,400%xrange -10,10%yrange -10,10%fontfamily Bold 42pt Courier%string black,0,0,Hello World%intooltip <span style="background-color:black;color:white;font-style:bold;font-size:48pt;">CLICK <br>HERE</span>
	    */
	    if(use_input_xy != FALSE ){canvas_error("intooltip can not be combined with userinput_xy or other commands using the tooltip-div...see documentation");}
	    if( use_tooltip == 1 ){ canvas_error("command 'intooltip' cannot be combined with command 'popup'...");}
	    tooltip_text = get_string(infile,1);
	    if(strstr(tooltip_text,"\"") != 0 ){ tooltip_text = str_replace(tooltip_text,"\"","'"); }
	    use_tooltip = 1;
	    break;

	case JSCURVE:
	/*
	 @ jscurve color,formula1(x),formula2(x),formula3(x),...
	 @ alternative: jsplot
	 @ your function will be plotted by the javascript engine of the client browser
	 @ if <a href='trange'>trange</a> is defined, the two functions will be plotted parametric<br><b>note</b>: use <i>x</i> as variable...and not <i>t</i>. Use keyword <a href='#animate'>animate</a> to animate a point on the curve
	 @ use only basic math in your curve: <code>sqrt,^,asin,acos,atan,log,pi,abs,sin,cos,tan,e</code>
	 @ use parenthesis and rawmath: use 2*x instead of 2x ; use 2^(sin(x))...etc etc (use error console to debug any errors...)
	 @ <b>attention</b>: last ''precision`` command in the canvasdraw script determines the calculation precision of the javascript curve plot !
	 @ no validity check is done by wims.
	 @ zooming & panning are implemented:<br>use command ''zoom color`` for mouse driven zooming<br>or use keyword 'setlimits' for inputfields setting xmin/xmax, ymin/ymax
	 @ zooming & panning is better than for curves produced by command <a href="#curve">curve color,formula</a> because for avery change in x/y-range the curve is recalculated in javascript
	 @ zooming & panning in case of userbased functionplot: reclick the OK button to re-plot curve onto the resized grid
	 @ use keyword <a href='animate'>animate</a> for animating a point on the curve
	 @ use command ''trace_jscurve formula(x)`` for tracing
	 @ use command ''jsmath formula(x)`` for calculating and displaying indiviual points on the curve
	 @ can <b>not</b> be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> (yet)
	 @ commands plotjump / plotstep are not active for ''jscurve``
	 @ every command jscurve will produce a new canvas (canvastype 111,112,113...) for this one curve.
	 @ plotting multiple js-curves on the same canvas (for example if you want to use 'userdraw clickfill,color' on <a href="#canvastype">canvastype</a> number 111, use:<br/> <code>jscurve red,fun1(x),fun2(x)...fun_n(x)</code>, you must specify individual multistrokecolors &amp; multistrokeopacity &amp; multilinewidth for these multiple js-curves to use different colors. Otherwise all curves will be the same color... Use commands like: <a href="#multistrokecolors">multistrokecolors</a>, <a href="#multilinewidth">multilinewidth</a>, <a href="#multidash">multidash</a>, <a href="#multistrokeopacity">multistroke</a>, <b>color</b> given for the command <code>jscurve color,formulas(x)</code> will not be used in that case... but the color argument must still be given in any case (otherwise syntax error...)
	 @%jscurve%size 400,400%xrange -10,10%yrange -10,10%multistrokecolors red,green,blue,orange%multilinewidth 1,2,3%multistrokeopacity 0.5,0.8,1.0%jscurve red,sin(x),1/sin(x),sin(x^2)
	*/
	    jsplot_cnt++;/* -1 --> 0 */
	    stroke_color = get_color(infile,0);
	    js_function[JS_MATH] = 1;
	    js_function[JS_PLOT] = 1;
	    if( tmin != 0 && tmax !=0){use_parametric = TRUE;}
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    string_length = 1 + snprintf(NULL,0,  "var js_plot%d = function(){jsplot(%d,[\"%s\"],[%d],[\"%s\"],[%.2f],[%d],%d,%d,[%f,%f],%d,%d,%d,0);};js_plot%d();",jsplot_cnt,JSPLOT_CANVAS+jsplot_cnt,temp,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],tmin,tmax,plot_steps,use_parametric,use_animate,jsplot_cnt);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,    "var js_plot%d = function(){jsplot(%d,[\"%s\"],[%d],[\"%s\"],[%.2f],[%d],%d,%d,[%f,%f],%d,%d,%d,0);};js_plot%d();",jsplot_cnt,JSPLOT_CANVAS+jsplot_cnt,temp,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],tmin,tmax,plot_steps,use_parametric,use_animate,jsplot_cnt);
	    add_to_buffer(tmp_buffer);
	    fprintf(js_include_file,"if(typeof(all_jsplots) !== 'number'){var all_jsplots;};all_jsplots = %d;",jsplot_cnt);

	     /* we need to create multiple canvasses, so we may zoom and pan ?? */
	break;

	case JSMATH:
	/*
	    @ jsmath some_math_function
	    @ will calculate an y-value from a userinput x-value and draws a crosshair on these coordinates.
	    @ default labels ''x`` and ''y``; the commands ''xlabel some_x_axis_name`` and ''ylabel some_y_axis_name`` will set the label for the input fields
	    @ use command 'css some_css' for styling the display fields. Use command 'fontsize int' to size the labels ''x`` and ''y``
	    @ the client browser will convert your math function to javascript math.<br>use parenthesis and rawmath: use 2*x instead of 2x etc etc<br>no check is done on the validity of your function and/or syntax<br>use error console to debug any errors...
	    @ be aware that the formula's of the plotted function(s) can be found in the page javascript source
	    @%jsmath%size 400,400%xrange -10,10%yrange -10,10%jsplot blue,sin(x^2)%jsmath sin(x^2)
	*/
	    js_function[DRAW_CROSSHAIRS] = 1;
	    js_function[JS_MATH] = 1;
	    add_calc_y(get_string(infile,1),font_size,css_class);
	    break;
	case KILL:
	/*
	@ kill arguments
	@ arguments may be: affine linear translation rotation slider offset  reset
	@ for documentation see: killaffine,killlinear,killtranslation...
	@ multiple arguments are allowed (although not checked for validity...)
	*/
	    temp = get_string(infile,1);
	    if(strstr(temp,"affine") != 0 ){use_affine = FALSE;affine_matrix[0] = 1.0;affine_matrix[1] = 0.0;affine_matrix[2] = 0.0;affine_matrix[3] = 1.0;affine_matrix[4] = 0.0;affine_matrix[5] = 0.0;}
	    if(strstr(temp,"linear") != 0 ){affine_matrix[0] = 1.0;affine_matrix[1] = 0.0;affine_matrix[2] = 0.0;affine_matrix[3] = 1.0;}
	    if(strstr(temp,"translation") != 0 || strstr(temp,"translate") != 0 ){affine_matrix[4] = 0.0;affine_matrix[5] = 0.0;}
	    if(strstr(temp,"rotation") != 0 || strstr(temp,"rotate") != 0 ){use_rotate = FALSE;angle = 0.0;rotation_center="null";}
	    if(strstr(temp,"slider") != 0 ){slider_type = "0";my_sliders = "[-1]";last_slider = use_slider+1;}
	    if(strstr(temp,"group") != 0 ){onclick = 0;drag_type = -1;slider_type = "0";my_sliders = "[-1]";last_slider = use_slider+1;use_slider = -1;reset();}
	    if(strstr(temp,"reset") != 0 ){if(no_reset == FALSE){no_reset = TRUE;}else{no_reset = FALSE;reset();}}
	    if(strstr(temp,"offset") != 0 ){use_offset = 0;}
	    break;
	case KILLAFFINE:
	/*
	@ killaffine
	@ keyword: resets the transformation matrix to 1,0,0,1,0,0
	@ note: any active linear transformation will also be reset: tx=0, ty=0
	*/
	    use_affine = FALSE;
	    affine_matrix[0] = 1.0;
	    affine_matrix[1] = 0.0;
	    affine_matrix[2] = 0.0;
	    affine_matrix[3] = 1.0;
	    affine_matrix[4] = 0.0;
	    affine_matrix[5] = 0.0;
	    break;
	case KILLLINEAR:
	/*
	@ killlinear
	@ keyword: resets the transformation matrix to 1,0,0,1,tx,ty
	@ note:any active transformation or rotation will not be killed (tx,ty remain active)
	*/
	    affine_matrix[0] = 1.0;
	    affine_matrix[1] = 0.0;
	    affine_matrix[2] = 0.0;
	    affine_matrix[3] = 1.0;
	    break;


	case KILLROTATE:
	/*
	 @ killrotate
	 @ will set the rotation angle to 0.
	 @ will also reset the command <a href="#rotationcenter">rotationcenter</a> to the first (x;y) of the next rotatable/slidable object(s) <br/>eg a following rotate command will have the first object point as rotation center
	 @ if not set, the rotation center will remain unchanged
	 @ note:any active transformation or linear will not be killed (e.g an active transformation matrix remains active)
	 @%killrotate%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%rotationcenter 0,0%# slider is active for all following objects until 'killslider'%slider -10,10,300,40,angle degree,Rotate%drag xy%# after dragging the object must be clicked to re-activate the slider%linewidth 4%arrow 0,0,6,0,9,blue%%# reset rotation center to the first (x,y) of the next object/arrow...%killrotate%drag xy%# after dragging the object must be clicked to re-activate the slider%arrow 0,0,6,1,9,red
	*/
	    use_rotate = FALSE;
	    angle = 0.0;
	    rotation_center="null";
	 break;

	case KILLSLIDER:
	/*
	 @ killslider
	 @ keyword (no arguments required)
	 @ ends grouping of object under a previously defined slider
	*/
	    slider_type = "0";
	    my_sliders = "[-1]";
	    last_slider = use_slider+1;
	    break;

	case KILLTRANSLATION:
	/*
	 @ killtranslation
	 @ alternative: killtranslate
	 @ note: a active linear or affine transformation will not be 100% reset...only tx=0,ty=0
	 @ resets the translation matrix a,b,c,d,tx,ty to a,b,c,d,0,0
	*/
	    affine_matrix[4] = 0.0;
	    affine_matrix[5] = 0.0;
	    break;

	case LATEX:
	/*
	 @ latex x,y,tex string
	 @ alternative: math
	 @ note: <b>for a single greek letter</b> ,please be smart and use a command like <a href='#string'>string</a> along with <b>unicode</b> !! <br>possibly together with command <a href="#xyoffset">xoffset, yoffset or xyoffset</a><br/> See <a target='new' href='https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode'>https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode</a><br/> See <a target='new' href='https://en.wikipedia.org/wiki/Greek_script_in_Unicode'>https://en.wikipedia.org/wiki/Greek_script_in_Unicode</a>
	 @ you may also use command <a href="#mathml">mathml</a> for xml strings generated with wims commmand ''mathmlmath`` (will not work on KaTeX enabled WIMS)
	 @ transformation commands <a href='#affine'>affine</a>, <a href='#translation'>translation</a> and <a href='#rotate'>rotate</a> are supported.(onclick and drag will work)
	 @ can be set onclick: <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects<br>if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
	 @ can be set draggable:<code>javascript:read_dragdrop();</code> will return all coordinates in the same order as the canvas script: unmoved object will have their original coordinates...
	 @ can be moved/rotated with command <a href='#slider'>slider</a>
	 @ snaptogrid is supported
	 @ when clicked, the colour of the 'div background' of the 'mathobject' will be determined by the <a href="#fillcolor">fillcolor</a> and <a href="#opacity">opacity</a> settings
	 @ userdraw may be combined with 'latex' ; the js-function 'read_canvas()' will contain the coordinates of the drawing.
	 @ userdraw may be combined; the read_canvas() will contain the drawing.
	 @ draggable or onclick 'external images' from command <a href='#copyresized'>copy or copyresized</a> and all objects from commands <a href='#html'>html</a> or <a href='#obabel'>obabel</a> can be combined with drag and/or onclick mathml
	 @ other drag objects (circles/rects etc) are supported, but read_dragdrop() will probably be difficult to interpret...
	 @ if inputfields are incorporated in mathml (with id's: id='mathml0',id='mathml1',...id='mathml_n')<br>the user_input values will be read by <code>javascript:read_mathml();</code>. <b>attention</b>: if after this mathml-input object other user-interactions are included, these will read mathml too using "read_canvas();"
	 @ If other inputfields (command input / command textarea) or userdraw are performed, the function read_canvas() will not read mathml. Use some generic function to read it....
	 @ use keyword <a href='#centered'>centered</a> to center the katex div object on (x1:y1) <br>this may not work as expected for MathJaX [TO BE TESTED]
	 @ note: if you want to include external TeX via drag&amp;drop onto a canvasdraw element, use \\mmlid{integer} in the tex-command:''!insmath \\mmlid{1}\\frac{1}{\pi}``<br> (if your wims_mathml does not support it...use <a href="http://85.148.206.56/wims/download/Mathml.tar.gz">this version...</a>)
	 @ note: the same is true for all external P,SPAN,DIV,IMG,SVG-images via drag&amp;drop onto a canvasdraw element, use ''onclick=javascript:place_image_on_canvas(this.id)``
	 @%latex_drag%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%strokecolor red%drag xy%centered%latex -6,5,\\frac{1}{2}+ \\frac{\\pi}{2}%strokecolor blue%drag xy%centered%latex -3,5,\\frac{1}{3}+ \\frac{\\pi}{3}%strokecolor green%drag xy%centered%latex 0,5,\\frac{1}{4}+ \\frac{\\pi}{4}%strokecolor orange%drag xy%fontfamily 26px Times%centered%latex 3,5,\\frac{1}{5}+ \\frac{\\pi}{6}
	 @%latex%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%vline 0,0,green%hline 0,0,green%fontfamily 16px Arial%fillcolor orange%strokecolor blue%linewidth 2%slider 0,4*pi,400,40,angle degree active, %centered%latex 0,0,\\frac{12345}{23456} \\times \\frac{12345}{23456}%translate 4,4%centered%rotate 180%drag xy%html 0,0,<table><tr><th>HTML TABLE</th></tr><tr><th><a href="https://wimsedu.info/">WIMS EDU </a> </th></tr><tr><td><img src="gifs/en.gif"></tr><tr><td><img src="gifs/nl.gif"></tr><tr><td><img src="gifs/fr.gif"></tr><tr><td><img src="gifs/cn.gif"></tr><tr><td><img src="gifs/it.gif"></tr></table>%userdraw arrow2,red
	*/
	    js_function[DRAW_XML] = 1;
	    for(i=0;i<3;i++){
		switch(i){
		    case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		    case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system  -> pixel height */
		    case 2: decimals = find_number_of_digits(precision);
		    temp = get_string(infile,1);
		    if(use_affine == TRUE ){ transform(2,2);}/* slider will use css-rotate transformation */
		    if( use_offset != 0 || drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		    int_data[0] = x2px(double_data[0]);
		    int_data[1] = y2px(double_data[1]);
		    if( use_slider != -1 && onclick == 0 ){ onclick = 5;}
		    if( use_slider != -1 && drag_type != -1){ onclick = 5; }
#ifdef KATEX_INSTALLED
		    if( strstr(temp,"\\") != 0 ){ temp = str_replace(temp,"\\","\\\\"); }
		    if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
		    string_length = 1 + snprintf(NULL,0,"var draw_xml%d = {id:%d,type:'katex',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,  "var draw_xml%d = {id:%d,type:'katex',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt);
#else
		    temp = getMML(temp);/* generate MathML for Firefox or MathJaX */
		    if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
		    string_length = 1 + snprintf(NULL,0,"var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,  "var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,drawxml_cnt);
#endif
		    add_to_buffer(tmp_buffer);
		    if(onclick != 0 ){object_cnt++;}
		    drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		    break;
		    default:break;
		}
	    }
	    reset();
	    break;
	case LATTICE:
	/*
	 @ lattice x0,y0,xv1,yv1,xv2,yv2,n1,n2,color
	 @ can <b>not</b> be set ''onclick`` or ''drag xy``
	 @%lattice%size 400,400%xrange -10,10%yrange -10,10%fillcolor red%linewidth 2%lattice -10,-10,0,1,1,1,10,10,red%fillcolor blue%lattice 10,-10,0,1,-1,1,10,10,blue
	*/
	    js_function[DRAW_LATTICE] = 1;
	    for( i = 0; i<9; i++){
		switch(i){
		    case 0: int_data[0] = x2px(get_real(infile,0));break; /* x0-values  -> x-pixels*/
		    case 1: int_data[1] = y2px(get_real(infile,0));break; /* y0-values  -> y-pixels*/
		    case 2: int_data[2] = (int) (get_real(infile,0));break; /* x1-values  -> x-pixels*/
		    case 3: int_data[3] = (int) -1*(get_real(infile,0));break; /* y1-values  -> y-pixels*/
		    case 4: int_data[4] = (int) (get_real(infile,0));break; /* x2-values  -> x-pixels*/
		    case 5: int_data[5] = (int) -1*(get_real(infile,0));break; /* y2-values  -> y-pixels*/
		    case 6: int_data[6] = (int) (get_real(infile,0));break; /* n1-values */
		    case 7: int_data[7] = (int) (get_real(infile,0));break; /* n2-values */
		    case 8: stroke_color=get_color(infile,1);
    			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"draw_lattice(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,\"%s\",%.2f,\"%s\",%.2f,%d,%.2f,%d); ",STATIC_CANVAS,line_width,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_rotate,angle,use_filled);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"draw_lattice(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,\"%s\",%.2f,\"%s\",%.2f,%d,%.2f,%d); ",STATIC_CANVAS,line_width,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],int_data[5],int_data[6],int_data[7],fill_color,fill_opacity,stroke_color,stroke_opacity,use_rotate,angle,use_filled);
			add_to_buffer(tmp_buffer);break;
		    default:break;
		}
	    }
	    reset();
	    break;
	case LINEAR:
	/*
	 @ linear a,b,c,d
	 @ defines a transformation matrix for subsequent objects
	 @ use keyword <a href='#killlinear'>killlinear</a> to end the transformation...the next objects will be drawn in the original x/y-range
	 @ a: Scales the drawings horizontally
	 @ b: Skews the drawings horizontally
	 @ c: Skews the drawings vertically
	 @ d: Scales the drawings vertically
	 @ the data precision may be set by preceding command ''precision int``
	 @ note: any active translation (tx,ty) is not changed
	 @%linear%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%fcircle 5,5,40,blue%linear 0.2,0,0,0.2%fcircle 5,5,40,green
	*/
	    for(i = 0 ; i<4;i++){
		switch(i){
		    case 0: affine_matrix[0] = get_real(infile,0);break;
		    case 1: affine_matrix[1] = get_real(infile,0);break;
		    case 2: affine_matrix[2] = get_real(infile,0);break;
		    case 3: affine_matrix[3] = get_real(infile,1);
		     affine_matrix[4] = 0;affine_matrix[5] = 0;
		     use_affine = TRUE;
		     break;
		    default: break;
		}
	    }
	    reset();
	break;

	case LINE:
	/*
	@ line x1,y1,x2,y2,color
	@ draw a line through points (x1:y1)--(x2:y2) in color ''color``
	@ or use command ''curve color,formula`` to draw the line (uses more points to draw the line; is however better draggable)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%line%size 400,400%xrange -10,10%yrange -10,10%line 0,1,2,-1,green
	*/
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: double_data[10]= get_real(infile,0);break; /* x-values */
		    case 1: double_data[11]= get_real(infile,0);break; /* y-values */
		    case 2: double_data[12]= get_real(infile,0);break; /* x-values */
		    case 3: double_data[13]= get_real(infile,0);break; /* y-values */
		    case 4: stroke_color=get_color(infile,1);/* name or hex color */
		    if( double_data[10] == double_data[12] ){ /* vertical line*/
			double_data[1] = xmin;
			double_data[3] = ymax;
			double_data[0] = double_data[10];
			double_data[2] = double_data[10];
		    }
		    else
		    {
			if( double_data[11] == double_data[13] ){ /* horizontal line */
			    double_data[1] = double_data[11];
			    double_data[3] = double_data[11];
			    double_data[0] = ymin;
			    double_data[2] = xmax;
			}
			else
			{
			/* m */
			double_data[5] = (double_data[13] - double_data[11]) /(double_data[12] - double_data[10]);
			/* q */
			double_data[6] = double_data[11] - ((double_data[13] - double_data[11]) /(double_data[12] - double_data[10]))*double_data[10];

			/*xmin,m*xmin+q,xmax,m*xmax+q*/

			    double_data[1] = (double_data[5])*(xmin)+(double_data[6]);
			    double_data[3] = (double_data[5])*(xmax)+(double_data[6]);
			    double_data[0] = xmin;
			    double_data[2] = xmax;
			}
		    }
		    if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
		    if(use_affine == TRUE ){ transform(4,2);}
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

		    decimals = find_number_of_digits(precision);
		    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		    add_to_buffer(tmp_buffer);
		    if(onclick != 0){object_cnt++;}
		    /* object_cnt++;*/
		    reset();
		    break;
		}
	    }
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case LINES:
	/*
	@ lines color,x1,y1,x2,y2...x_n-1,y_n-1,x_n,y_n
	@ draw multiple lines through points (x1:y1)--(x2:y2) ...(x_n-1:y_n-1)--(x_n:y_n) in color 'color'
	@ or use multiple commands ''curve color,formula`` or ''jscurve color,formule`` to draw the line <br>(uses more points to draw the line; is however better draggable)
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@ <b>attention</b>: the flydraw command ''lines`` is equivalent to canvasdraw command <a href="#polyline">polyline</a>
	@%lines%size 400,400%xrange -10,10%yrange -10,10%lines green,0,1,1,3,0,0,1,3,0,0,-2,1
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    for(c = 0 ; c < i-1 ; c = c+4){
		if( double_data[c] == double_data[c+2] ){ /* vertical line*/
		    double_data[c+1] = xmin;
		    double_data[c+3] = ymax;
		    double_data[c+2] = double_data[c];
		}
		else
		{
		    if( double_data[c+1] == double_data[c+3] ){ /* horizontal line */
			double_data[c+3] = double_data[c+1];
			double_data[c] = ymin;
			double_data[c+2] = xmax;
		    }
		    else
		    {
			/* m */
			double m = (double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]);
			/* q */
			double q = double_data[c+1] - ((double_data[c+3] - double_data[c+1]) /(double_data[c+2] - double_data[c]))*double_data[c];
			/*xmin,m*xmin+q,xmax,m*xmax+q*/
			double_data[c+1] = (m)*(xmin)+(q);
			double_data[c+3] = (m)*(xmax)+(q);
			double_data[c] = xmin;
			double_data[c+2] = xmax;
		    }
		}
		if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
		if(use_affine == TRUE ){ transform(i-1,2);}

		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}
		/* object_cnt++; */
	    }
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;


	case LINEWIDTH:
	/*
	@ linewidth int
	@ default 1
	@%linewidth%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%line -5,-5,-5,5,red%linewidth 2%line -4,-5,-4,5,green%linewidth 3%line -3,-5,-3,5,blue%linewidth 4%line -2,-5,-2,5,orange%linewidth 1%line -1,-5,-1,5,brown%linewidth 5%line 1,-5,1,5,cyan%linewidth 6%line 3,-5,3,5,purple%linewidth 7%line 5,-5,5,5,black
	*/
	    line_width = (int) (get_real(infile,1));
	    break;

	case LEVELCURVE:
	/*
	@ levelcurve color,expression in x/y,l1,l2,...
	@ draws very primitive level curves for expression, with levels l1,l2,l3,...,l_n
	@ the quality is <b>not to be compared</b> with the Flydraw levelcurve. <br>(choose flydraw if you want quality...)
	@ every individual level curve may be set 'onclick / drag xy' <br>e.g. every single level curve (l1,l2,l3...l_n) has a unique identifier
	@ note: the arrays for holding the javascript data are limited in size
	@ note: reduce image size if javascript data arrays get overloaded<br>(command 'plotsteps int' will not control the data size of the plot...)
	@%levelcurve%size 400,400%xrange -10,10%yrange -10,10%levelcurve red,x*y,1,2,3,4
	*/
	    fill_color = get_color(infile,0);
	    char *fun1 = get_string_argument(infile,0);
	    if( strlen(fun1) == 0 ){canvas_error("function is NOT OK !");}
	    i = 0;
	    done = FALSE;
	    while( !done ){
	     double_data[i] = get_real(infile,1);
	     i++;
	    }
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    for(c = 0 ; c < i; c++){
	     string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,16,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_levelcurve(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,double_data[c]),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	     snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,16,%s,[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,eval_levelcurve(xsize,ysize,fun1,xmin,xmax,ymin,ymax,plot_steps,precision,double_data[c]),line_width,line_width,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	     add_to_buffer(tmp_buffer);
	     if(onclick != 0){object_cnt++;}
	     /* object_cnt++; */
	    }
	    dragstuff[16] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case LEGEND:
	/*
	@ legend string1:string2:string3....string_n
	@ will be used to create a legend for a graph
	@ also see command <a href='#piechart'>piechart</a>
	@ will use the same colors per default as used in the graphs; use command <a href='#legendcolors'>legendcolors</a> to override the default
	@ use command <a href="#fontsize">fontsize</a> to adjust. (command ''fontfamily`` is not active for command ''legend``)
	@%legend%size 400,400%xrange -10,10%yrange -10,10%bgcolor white%fontsize 16%legend legend 1:legend 2:legend 3:legend 4:this is legend 5:legend 6:another legend abc%legendcolors red:green:blue%grid 1,1,white%# note: command "grid" is mandatory%# just set grid invisible if not wanted
	*/
	    temp = get_string(infile,1);
	    if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
	    legend_cnt++; /* attention: starts with -1: it will be used in piechart etc */
	    fprintf(js_include_file,"var legend%d = [\"%s\"];",legend_cnt,temp);
	    break;

	case LEGENDCOLORS:
	/*
	@ legendcolors color1:color2:color3:...:color_n
	@ will be used to color a legend: use this command after the legend command ! e.g. <code>legend test1:test2:test3<br>legendcolors blue:red:orange</code>.
	@ make sure the number of colors match the number of legend items
	@ command ''legend`` in case of ''piechart`` and ''barchart`` will use these colours per default (no need to specify ''legendcolors``)
	@%legendcolors%size 400,400%xrange -10,10%yrange -10,10%fontsize 18%legend legend 1:legend 2:legend 3%legendcolors red:green:blue%grid 1,1,grey
	*/
	    if(legend_cnt == -1){canvas_error("use command \"legend\" before command \"legendcolors\" ! ");}
	    temp = get_string(infile,1);
	    if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
	    fprintf(js_include_file,"var legendcolors%d = [\"%s\"];",legend_cnt,temp);
	    break;

	case LINEGRAPH: /* scheme: var linegraph_0 = [ 'stroke_color','line_width','use_dashed', 'dashtype0','dashtype1','x1','y1',...,'x_n','y_n'];*/
	/*
	@ linegraph x1:y1:x2:y2...x_n:y_n
	@ will plot your data in a graph
	@ may <b>only</b> to be used together with command <a href='#grid'>grid</a>
	@ can be used together with freestyle x-axis/y-axis texts: see commands <a href='#xaxis'>xaxis</a>,<a href='#xaxisup'>xaxisup</a> and <a href='#yaxis'>yaxis</a>
	@ use command <a href='#legend'>legend</a> to provide an optional legend in right-top-corner
	@ also see command <a href='#piechart'>piechart</a>
	@ multiple linegraphs may be used in a single plot
	@ note: your arguments are not checked by canvasdraw: use your javascript console in case of trouble...
	@ <ul><li>use command <a href='#strokecolor'>strokecolor</a> before a command ''linegraph`` to set the color of this graph</li><li>use command <a href='#linewidth'>linewidth</a> before command ''linegraph`` to set linewidth of this graph</li><li>use keyword <a href='#dashed'>dashed</a> before command ''linegraph`` to set dashing of the graph</li><li>if dashing is set, use command <a href='#dashtype'>dashtype</a> before command ''linegraph`` to set the type of dashing of the (individual) graph</li></ul>
	@%linegraph%size 400,400%xrange -10,10%yrange -10,10%strokecolor red%linegraph -10:1:-5:-1:3:3:10:-5%strokecolor blue%linegraph -10:-1:-5:1:3:-3:10:5%dashed%strokecolor green%linegraph -10:2:-5:-2:3:4:10:2%grid 1,1,grey
	*/
	    temp = get_string(infile,1);
	    if( strstr( temp,":") != 0 ){ temp = str_replace(temp,":","\",\""); }
	    fprintf(js_include_file,"var linegraph_%d = [\"%s\",\"%d\",\"%d\",\"%d\",\"%d\",\"%s\"];",linegraph_cnt,stroke_color,line_width,use_dashed,dashtype[0],dashtype[1],temp);
	    linegraph_cnt++;
	    reset();
	    break;

	case MATHML:
	/*
	@ mathml x1,y1,mathml_string
	@ this command is special for GECKO browsers, and it makes use of Native Mathml
	@ For general use with all browsers, use command <a href='#latex'>latex</a>
	@ can be set <a href='onclick'>onclick</a>  and <a href='drag'>drag&amp;drop</a> <br>Note: dragging is fairly primitive dragging of the div-element, and is not done using the <em>dragstuff library</em>
	@ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
	@ command <a href='#rotate'>rotate</a> will rotate the object
	@ the mathml object is centered at (x1:y1)
	@ the ''mathml_string`` can be produced using WIMS commands like ''texmath`` followed by ''mathmlmath``... or write correct TeX and use only ''mathmlmath``
	@ mathml will be displayed in a rectangle left top (x1:y1)
	@ can be set onclick <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects; if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
	@ can be set draggable: <code>javascript:read_dragdrop()</code> will return all coordinates in same order as the canvas script: unmoved objects will have their original coordinates...
	@ snaptogrid is supported...snaptopoints will work, but use with care... due to the primitive dragging. Technically: the dragstuff library is not used... the mathml is embedded in a new div element and not in the html5-canvas.
	@ when clicked, the mathml object will be drawn in red color; the div background color will be determined by the <a href="#fillcolor">fillcolor</a> and <a href="#opacity">opacity</a> settings.
	@ userdraw may be combined with 'mathml' ; the read_canvas() will contain the drawing.
	@ draggable or onclick 'external images' from command <a href='#copyresized'>copy or copyresized</a> can be combined with drag and/or onclick mathml
	@ other drag objects (circles/rects etc) are supported, but read_dragdrop() will probably be difficult to interpret...
	@ if inputfields are incorporated in mathml (with id's: id='mathml0',id='mathml1',...id='mathml_n')<br>the user_input values will be read by javascript:read_mathml();<br><b>attention</b>: if after this mathml-input object other user-interactions are included, these will read mathml too using "read_canvas();"
	@ If other inputfields (command input / command textarea) or userdraw is performed, the function read_canvas() will not read mathml. Use some generic function to read it....
	@ use keyword <a href='#centered'>centered</a> to center the mathml/xml object on (x1:y1)
	@%mathml_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%strokecolor red%mathml -5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml366290"><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none " ><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mn>2</mn></mfrac></mstyle><mo>&sdot;</mo><msup><mi>x</mi> <mn>2</mn></msup></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><msup><mi>x</mi> <mn>2</mn></msup></mrow></mfrac></mstyle></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%onclick%strokecolor blue%mathml 5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml580175" ><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines="none"><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></mfrac></mstyle></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>
	@%mathml_drag%size 400,400%xrange -10,10%yrange -10,10%drag xy%strokecolor red%mathml -5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml366290"><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none "><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mn>2</mn></mfrac></mstyle><mo>&sdot;</mo><msup><mi>x</mi> <mn>2</mn></msup></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><msup><mi>x</mi> <mn>2</mn></msup></mrow></mfrac></mstyle></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%drag xy%strokecolor blue%mathml 5,5,<span style="font-size:1em;"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mstyle id="wims_mathml580175" ><mrow><mo stretchy="true">[</mo><mtable rowspacing="0.5ex" columnalign=" left " columnlines=" none " rowlines=" none "><mtr><mtd><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><mstyle displaystyle="true"><mfrac><mn>1</mn><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></mfrac></mstyle></mtd></mtr> <mtr><mtd><mi>g</mi><mo stretchy="false">(</mo><mi>x</mi><mo stretchy="false">)</mo><mo>=</mo><msqrt><mrow><mi>sin</mi><mrow><mo stretchy="true">(</mo><msup><mi>x</mi> <mn>2</mn></msup><mo stretchy="true">)</mo></mrow></mrow></msqrt></mtd></mtr></mtable><mo stretchy="true">]</mo></mrow></mstyle></math></span>%#click left top corner...then drag...
	*/
	    js_function[DRAW_XML] = 1;
	    for(i=0;i<3;i++){
		switch(i){
		    case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		    case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system  -> pixel height */
		    case 2: decimals = find_number_of_digits(precision);

			    if(use_affine == TRUE ){ transform(2,2);}/* needs double_data[] */
			    if( use_offset != 0 || drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
			    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			    int_data[0] = x2px(double_data[0]);/* needs px */
			    int_data[1] = y2px(double_data[1]);
			    if( use_slider != -1 && onclick == 0 ){ onclick = 3;}/* no drag&onclick but slideable */
			    if( use_slider != -1 && drag_type != -1){ onclick = 5; }
			    temp = get_string(infile,1);
			    if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
			    string_length = 1 + snprintf(NULL,0,"var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%d,rotation_center:%s,once:true};draw_xml(draw_xml%d);slidergroup[%d] = null;\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,use_slider,rotation_center,drawxml_cnt,object_cnt);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,  "var draw_xml%d = {id:%d,type:'mathml',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%d,rotation_center:%s,once:true};draw_xml(draw_xml%d);slidergroup[%d] = null;\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,use_slider,rotation_center,drawxml_cnt,object_cnt);
			    add_to_buffer(tmp_buffer);
			    if(onclick != 0 ){object_cnt++;}
			    drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
			    /*
		    		in case inputs are present, trigger adding the read_mathml()
		    		if no other reply_format is defined
		    		note: all other reply types will include a reading of elements with id='mathml'+p)
			    */
			    if(strstr(temp,"mathml0") != NULL){ if(reply_format == 0 ){reply_format = 16;}} /* no other reply type is defined */
			    break;
		    default:break;
		}
	    }
	    reset();
	    break;

	case MOUSE:
	/*
	 @ mouse color,fontsize
	 @ will display the cursor (x:y) coordinates in ''color`` and ''fontsize`` using default fontfamily Arial
	 @ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``)
	 @%mouse%size 400,400%xrange -10,10%yrange -10,10%mouse red,22
	*/
	    stroke_color = get_color(infile,0);
	    font_size = (int) (get_real(infile,1));
	    tmp_buffer = my_newmem(26);
	    snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
	    add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,2);
	    js_function[INTERACTIVE] = 1;
	    break;


	case MOUSE_DEGREE:
	/*
	 @ mouse_degree color,fontsize
	 @ will display the angle in degrees between x-axis, (0:0) and the cursor (x:y) in 'color' and 'font size'<br> using a fontfamily Arial
	 @ The angle is positive in QI and QIII and the angle value is negative in QII and QIV
	 @ note: use command 'mouse' at the end of your script code (the same is true for command 'zoom')
	 @%mouse_degree%size 400,400%xrange -10,10%yrange -10,10%userdraw arc,blue%precision 100000%mouse_degree red,22
	*/
	    stroke_color = get_color(infile,0);
	    font_size = (int) (get_real(infile,1));
	    tmp_buffer = my_newmem(26);
	    snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
	    add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,3);
	    js_function[JS_FIND_ANGLE] = 1;
	    js_function[INTERACTIVE] = 1;
	    break;
	case MOUSE_DISPLAY:
	/*
	 @ display TYPE,color,fontsize
	 @ TYPE may be x | y | xy | degree | radian | radius
	 @ will display the mouse cursor coordinates as x-only,y-only,(x:y), the radius of a circle (this only in case 'userdraw circle(s),color') or the angle in degrees or radians for commands <code>userdraw arc,color</code> or protractor, ruler (if set dynamic).
	 @ use commands ''xunit`` and / or ''yunit`` to add the units to the mouse values. The ''degree | radian`` will always have the appropriate symbol).
	 @ just like commands ''mouse``, ''mousex``, ''mousey``, ''mouse_degree``... only other name
	 @%display_x%size 400,400%xrange -10,10%yrange -10,10%xunit \\u212B%display x,red,22
	 @%display_y%size 400,400%xrange -10,10%yrange -10,10%yunit seconds%display y,red,22
	 @%display_xy%size 400,400%xrange -10,10%yrange -10,10%xunit centimetre%yunit seconds%display xy,red,22%userdraw segments,blue
	 @%display_deg%size 400,400%xrange -10,10%yrange -10,10%display degree,red,22%fillcolor orange%opacity 200,50%userdraw arc,blue
	 @%display_rad%size 400,400%xrange -10,10%yrange -10,10%display radian,red,22%fillcolor orange%opacity 200,50%userdraw arc,blue
	 @%display_radius%size 400,400%xrange -10,10%yrange -10,10%xunit cm%xunit \\u212b%display radius,red,22%userdraw circle,blue
	*/
	temp = get_string_argument(infile,0);
	if( strstr(temp,"xy") != NULL ){
	    int_data[0] = 2;
	}else{
	    if( strstr(temp,"y") != NULL ){
		int_data[0] = 1;
	    }else{
		if( strstr(temp,"x") != NULL ){
		    int_data[0] = 0;
		}else{
		    if(strstr(temp,"degree") != NULL){
			int_data[0] = 3;
			js_function[JS_FIND_ANGLE] = 1;
		    }else{
			if(strstr(temp,"radian") != NULL){
			    int_data[0] = 4;
			    js_function[JS_FIND_ANGLE] = 1;
			}else{
			    if(strstr(temp,"radius") != NULL){
				int_data[0] = 5;
		    	    }else{
				int_data[0] = 2;
			    }
			}
		    }
		}
	    }
	}
	stroke_color = get_color(infile,0);
	font_size = (int) (get_real(infile,1));
	tmp_buffer = my_newmem(26);
	snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
	add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,int_data[0]);
	js_function[INTERACTIVE] = 1;
	break;

	case MOUSE_PRECISION:
	/*
	    @ precision int
	    @ 1 = no decimals ; 10 = 1 decimal ; 100 = 2 decimals etc
	    @ may be used / changed before every object
	    @ In case of user interaction (like ''userdraw`` or ''multidraw``), this value will be used to determine the amount of decimals in the reply / answer
	    @%precision%size 400,400%xrange -10,10%yrange -10,10%precision 1%userdraw segment,red
	*/
	    precision = (int) (get_real(infile,1));
	    if(precision < 1 ){precision = 1;};
	    break;

	case MOUSEX:
	/*
	 @ mousex color,fontsize
	 @ will display the cursor x-coordinate in ''color`` and ''font size`` using the fontfamily Arial.
	 @ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``).

	*/
	    stroke_color = get_color(infile,0);
	    font_size = (int) (get_real(infile,1));
	    tmp_buffer = my_newmem(26);
	    snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
	    add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,0);
	    js_function[INTERACTIVE] = 1;
	    break;
	case MOUSEY:
	/*
	 @ mousey color,fontsize
	 @ will display the cursor y-coordinate in ''color`` and ''font size`` using default fontfamily Arial.
	 @ note: use command ''mouse`` at the end of your script code (the same is true for command ''zoom``).

	*/
	    stroke_color = get_color(infile,0);
	    font_size = (int) (get_real(infile,1));
	    tmp_buffer = my_newmem(26);
	    snprintf(tmp_buffer,26,"use_mouse_coordinates();\n");add_to_buffer(tmp_buffer);
	    add_js_mouse(MOUSE_CANVAS,precision,stroke_color,font_size,stroke_opacity,1);
	    js_function[INTERACTIVE] = 1;
	    break;

	case MULTIDASH:
	/*
	 @ multidash 0,1,1
	 @ meaning draw objects no. 2 (circle) and 3 (segments), in the list of command like <code>multifill points,circle,segments</code>, are dashed
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all objects will be set ''not dashed``... unless a generic keyword ''dashed`` was given before command ''multidraw``
	 @ the dash-type is not -yet- adjustable <br>(e.g. command <code>dashtype line_px,space_px</code> will give no control over multidraw objects)
	 @ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    fprintf(js_include_file,"var multidash = [\"%s\"];",temp);
	    reset();/* if command 'dashed' was given...reset to not-dashed */
	    break;

	case MULTIDRAW:
	/*
	 @ multidraw obj_type_1,obj_type_2...obj_type_11
	 @ for simple single object user drawings you could also use command <a href="#userdraw">userdraw</a>
	 @ implemented obj_types:<ul><li>point | points</li><li>circle | circles</li><li>line | lines</li><li>segment | segments</li><li>arrow | arrows (use command 'arrowhead int' for size (default value 8 pixels))</li><li>curvedarrow | curvedarrows</li><li>rect | rects</li><li>closedpoly<br><b>only one</b> closedpolygon may be drawn.The number of ''corner points`` is not preset (e.g. not limited, freestyle), the polygon is closed when clicking on the first point again..(+/- 10px)</li><li>triangle | triangles</li><li>parallelogram | parallelograms</li><li>poly[3-9] | polys[3-9] draw 3...9 point polygone(s): polys3 is of course triangles</li><li>images</li><li>crosshair | crosshairs</li><li>function <br/>for more function user input fields, use it multiple times<br>for 4 inputfields use : multidraw function,function,function,function</li></ul>
	 @ additionally objects may be user labelled, using obj_type ''text``...<br>in this case allways a text input field and if <a href='#multiuserinput'> multiuserinput=1 </a> also (x:y) inputfields will be added to the page.<br>use commands ''fontfamily`` and ''fontcolor`` to adjust (command ''multistrokeopacity`` may be set to adjust text opacity)<br>note: text is always centered on the mouse-click or user-input coordinates !<br>note: no keyboard listeners are used
	 @ it makes no sense using something like ''multidraw point,points`` ... <br>something like "multidraw polys4,polys7" will only result in drawing a ''4 point polygone`` and not a ''7 point polygone``: this is a design flaw and not a feature...
	 @ note: mouselisteners are only active if "&#36;status != done " (eg only drawing in an active/non-finished exercise) <br> to overrule use command/keyword "status" (no arguments required)
	 @ buttons for changing the obj_type (and in case of ''multiuserinput``, some inputfields and buttons) <br>will be present in the reserved div ''tooltip_div`` and can be styled using command 'css some_css'
	 @ the button label will be default the ''object primitive name`` (like ''point``, ''circles``).<br>If you want a different label (e.g. an other language), use command ''multilabel``<br>for example in dutch: <br><code>multilabel cirkel,lijnstuk,punten,STOP<br>multidraw circle,segment,points</code><br>(see command <a href='#multilabel'>multilabel</a> for more details)
	 @ a right mouse button click will remove the last drawn object of the selected drawing type. All other type of objects are not removed
	 @ multidraw is incompatible with command ''tooltip`` (the reserved div_area is used for the multidraw control buttons)
	 @ all ''multidraw`` drawings will scale on zooming.<br>this in contrast to the command <a href="#userdraw">userdraw</a>.
	 @ wims will <b>not</b> check the amount or validity of your command arguments ! <br>( use javascript console to debug any typo's )
	 @ a local function <code>read_canvas%d</code> will read all userbased drawings.<br>The output is always a 16 lines string with fixed sequence.<br/>line 1 = points_x+";"+points_y+"\\n"<br/>line 2 = circles_x+";"+circles_y+";"+multi_radius+"\\n"<br/>line 3 = segments_x+";"+segments_y+"\\n"<br/>line 4 = arrows_x+";"+arrows_y+"\\n"<br/>line 5 = lines_x+";"+lines_y+"\\n"<br/>line 6 = triangles_x+";"+triangles_y+"\\n"<br/>line 7 = polys[3-9]_x+";"+polys[3-9]_y+"\\n"<br/>line 8 = rects_x +";"+rects_y+"\\n"<br>line 9 = closedpoly_x+";"+closedpoly_y+"\\n"<br/>line 10 = parallelogram_x+";"+parallelogram_y"\\n"<br/>line 11 = text_x+";"+text_y+";"+text"\\n"<br>line 12 = image_x+";"+image_y+";"+image_id<br>line 13 = curvedarrows_x +";"+ curvedarrows_y +"\\n"<br>line 14 = curvedarrows2_x +";"+ curvedarrows2_y +"\\n"<br>line 15 = crosshairs_x +";"+ crosshairs_y +"\\n"<br>line 16 = userdraw_x +";"+userdraw_y + "\\n" note: this is for single ''userdraw object,color`` and ''replyformat 29``<br/>line 17 = userdraw_x +";"+userdraw_y +";"+userdraw_radius + "\\n" note: this is for single ''userdraw object,color`` and ''replyformat 29``<br/>The x/y-data are in x/y-coordinate system and display precision may be set by a previous command ''precision 0 | 10 | 100 | 1000...``<br>In case of circles the radius is -for the time being- rounded to pixels<br><b>use the wims "direct exec" tool to see the format of the reply</b>
	 @ It is best to prepare / format the student reply in clientside javascript.<br>However in ''wims`` language you could use something like this<br>for example you are interested in the polys5 drawings of a pupil (the pupil may draw multiple poly5 objects...)<br>note: the reply for 2 poly5's is: x11,x12,x13,x14,x15,x21,x22,x23,x24,x25 ; y11,y12,y13,y14,y15,y21,y22,y23,y24,y25<br>rep = !line 7 of reply <br>rep = !translate ';' to '\\n' in &#36;rep <br>pts = 5 # 5 points for polygon <br>x_rep = !line 1 of &#36;rep <br>y_rep = !line 2 of &#36;rep <br>tot = !itemcnt &#36;x_rep <br>num_poly = &#36;[&#36;tot/&#36;pts] <br>idx = 0 <br>!for p=1 to &#36;num_poly <br>&nbsp;!for s=1 to &#36;pts <br>&nbsp;&nbsp;!increase idx <br>&nbsp;&nbsp;X = !item &#36;idx of &#36;x_rep <br>&nbsp;&nbsp;Y = !item &#36;idx of &#36;y_rep <br>&nbsp;&nbsp;# do some checking <br>&nbsp;!next s <br>!next p <br>
	 @ <b>attention</b>: for command argument ''closedpoly``, only one polygone can be drawn. The last point (e.g. the point clicked near the first point) of the array is removed.
	 @ technical: all 10 ''draw primitives`` + ''text`` will have their own -transparent- PNG bitmap canvas. <br>So for example there can be a points_canvas entirely separated from a line_canvas.<br>This to avoid the need for a complete redraw when something is drawn to the canvas...(eg only the object_type_canvas is redrawn), this in contrast too many very slow do-it-all HTML5 canvas javascript libraries.<br>The mouselisteners are attached to the canvas-div element.
	 @ a special object type is ''images``.<br>if used together with <a href='#imagepalette'>imagepalette</a> a image table will be integrated in the 'control section' of multidraw (set <code>multiuserinput 1</code> for ''images``) if not used with <a href='#imagepalette'>imagepalette</a>, provide the images or div's (&lt;img&gt; tag with bitmap or SVG or anything in a div element) somewhere on the html exercise page, with an onclick handler like:<br><code>&lt;img src='gifs/images/dog.svg' onclick='javascript:place_image_on_canvas(this.id);' id="ext_image_1" /&gt;<br>&lt;img src='gifs/fish.png' onclick='javascript:place_image_on_canvas(this.id);' id="another" /&gt;</code><br>etc ... when activating the multidraw ''image`` button, the images can be selected<br> (left mouse button/onclick) and placed on the canvas...left mouse click.<br>using div's will enable you -amongst other content- to add math typesetting from the exercise page onto the canvas.
	 @ When you are not content with the default ''multidraw control panel``, you can create your own interface, using a few javascript functions to call the drawprimitives, delete things and ''stop drawing`` in case you also want to drag&drop stuff...</br>To activate this feature, use <a href='#multilabel'>multilabel NOCONTROLS</a><br>The object types are internally represented by the following numbers (making typos will render your exercise null and void)<br/>point = 0<br>points =1<br>circle = 2<br>circles = 3<br>line = 4<br>lines = 5<br>segment = 6<br>segments = 7<br>arrow = 8<br>arrows = 9<br>triangle = 10<br>triangles = 11<br>closedspoly = 12<br>text = 13<br>rect = 14<br>rects = 15<br>poly[3-9] = 16<br>polys[3-9] = 17<br>parallelogram = 18<br>parallelograms = 19<br>images	= 20<br>curvedarrow = 21<br>curvedarrows = 22<br>curvedarrow2 = 23<br>curvedarrows2 = 24<br>crosshair = 25<br>crosshairs = 26 <br>controls for example:<br><code>&lt;input type='button' onclick='javascript:userdraw_primitive=null' value='STOP DRAWING' /&gt;<br>&lt;input type='button' onclick='javascript:userdraw_primitive=24;multidraw_object_cnt = 0;' value='start drawing curvedarrows2' /&gt; <br>&lt;input type='button' onclick='javascript:var fun=eval("clear_draw_area"+canvas_scripts[0]);fun(24,0);' value='REMOVE LAST CURVEDARROW ' /&gt; </code><br/> If using multiple canvas scripts in a single page, loop through the canvas_scripts[n] <br>note: if using NOCONTROLS and just a single draw primitive (for example, just: 'multidraw circles'), the object may be drawn directly. (analogue to 'userdraw circles,color')<br>And since a right mouse button click will always remove the last drawn object of the current object type, there is no need for a special "remove button"
	 @%multidraw_function%size 400,400%xrange -10,10%yrange -10,10%fontfamily Italic 22px Helvetica%axis%axisnumbering%precision 0%grid 2,2,grey,1,1,5,black%multicolors red,green,blue%fontcolor orange%multilinewidth 1,2,3%multidraw text,function,function,function,line
	 @%multidraw%size 400,400%xrange -10,10%yrange -10,10%multidash 1,0%multilinewidth 1,2%multistrokecolors red,blue%multisnaptogrid 1,1%multilabel LINES,CIRCLES,STOP DRAWING%multidraw lines,circles
	 @%multidraw_images%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%drag xy%# use special function to read the drag coordinates%copy 0,0,-1,-1,-1,-1,gifs/images/skull_and_crossbones50.png%fontcolor green%fontfamily Bold 42pt Arial%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multiuserinput 0,0,1%css color:blue;%multisnaptogrid 1,1,1%multilinewidth 0,4,0%# attention: use unicode text input without the slash %# \u222D ---> u222D at least will sometimes work%# otherwise cut&past unicode symbols into inputfield...%multilabel TEXT,REACTION ARROW,FLAGS,STOP DRAWING%multidraw text,arrow,images
	 @%multidraw_demo%size 800,800%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%css color:blue;%fontfamily Italic 42pt Arial%precision 1%opacity 200,50%snaptogrid%linewidth 3%filled%multistrokecolors red,green,blue,orange,yellow,purple,black,cyan,red,green,blue,orange,green,purple,black,cyan%multifillcolors red,green,blue,orange,yellow,purple,black,cyan,red,green,blue,orange,brown,purple%imagepalette gifs/ca.gif,gifs/en.gif,gifs/nl.gif,gifs/fr.gif,gifs/cn.gif,gifs/de.gif,gifs/kh.gif,gifs/it.gif%multidraw closedpoly,segments,rect,parallelogram,triangles,poly5,points,lines,arrows,circles,text,curvedarrows,curvedarrows2,images
	 @%multidraw_NOCONTROLS%size 400,400%xrange -10,10%yrange -10,10%grid 2,2,grey%linewidth 3%strokecolor green%fillcolor blue%filled%opacity 255,60%multilabel NOCONTROLS%multidraw circles%# RIGHT MOUSE CLICK REMOVES LAST OBJECT
	*/
	    js_function[INTERACTIVE] = 1;
	    if(js_function[JS_ZOOM] == 1){use_zoom = 1;} /* use noisy zoom_code, when command zoom is given before command 'multidraw' */
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    if( use_userdraw == 1 ){canvas_error("Only one userdraw primitive may be used in command 'userdraw' use command 'multidraw' for this...");}
	    use_userdraw = 2;
	    temp = get_string(infile,1);
	    fprintf(js_include_file,"\
	    var MMP = %d;\
	    if( typeof(multisnaptogrid) == 'undefined' && multisnaptogrid == null){var multisnaptogrid = new Array(MMP);for(var i=0;i<MMP;i++){multisnaptogrid[i] = %d;};};\
	    if( typeof(multistrokecolors) === 'undefined' && multistrokecolors == null){ var multistrokecolors = new Array(MMP);for(var i=0;i<MMP;i++){multistrokecolors[i] = '%s';};};\
	    if( typeof(multifillcolors) === 'undefined' && multifillcolors == null ){var multifillcolors = new Array(MMP);for(var i=0;i<MMP;i++){multifillcolors[i] = '%s';};};\
	    if( typeof(multistrokeopacity) === 'undefined' && multistrokeopacity == null){var multistrokeopacity = new Array(MMP);for(var i=0;i<MMP;i++){multistrokeopacity[i] = %.2f;};};\
	    if( typeof(multifillopacity) === 'undefined' &&  multifillopacity == null){var multifillopacity = new Array(MMP);for(var i=0;i<MMP;i++){multifillopacity[i] = %.2f;};};\
	    if( typeof(multilinewidth) === 'undefined' && multilinewidth == null){var multilinewidth = new Array(MMP);for(var i=0;i<MMP;i++){multilinewidth[i] = %d;};};\
	    if( typeof(multifill) === 'undefined' && multifill == null){var multifill = new Array(MMP);for(var i=0;i<MMP;i++){multifill[i] = %d;};};\
	    if( typeof(multidash) === 'undefined' && multidash == null){var multidash = new Array(MMP);for(var i=0;i<MMP;i++){multidash[i] = %d;};};\
	    if( typeof(multilabel) === 'undefined' && multilabel == null){var multilabel = [\"%s\",\"stop drawing\"];};\
	    if( typeof(multiuserinput) === 'undefined' && multiuserinput == null){var multiuserinput = new Array(MMP);for(var i=0;i<MMP;i++){multiuserinput[i] = '0';};};\
	    var arrow_head = %d;var multifont_color = '%s';var multifont_family = '%s';var forbidden_zone = [xsize+2,ysize+2];",
	    MAX_MULTI_PRIMITIVES,
	    use_snap,
	    stroke_color,
	    fill_color,
	    stroke_opacity,
	    fill_opacity,
	    line_width,
	    use_filled,
	    use_dashed,
	    str_replace(temp,",","\",\""),
	    arrow_head,font_color,font_family);
	    add_js_multidraw(temp,css_class,use_offset,int_data[MAX_MULTI_PRIMITIVES+1],crosshair_size,use_zoom);
	    /* no_controls == int_data[MAX_MULTI_PRIMITIVES+1] */
	    reply_precision = precision;
	    if(strstr(temp,"text") != NULL){
	     js_function[JS_SAFE_EVAL] = 1;
	     js_function[DRAW_SUBSUP] = 1;
	    }
	    if(strstr(temp,"function") != NULL){
	    int pp, funs = count_substring(temp, "function");
	     js_function[JS_SAFE_EVAL] = 1;
	     js_function[JS_RAWMATH] = 1;
	     js_function[DRAW_JSFUNCTION] = 1;
	     js_function[JS_MATH] = 1;
	     js_function[JS_PLOT] = 1;
	     for(pp = 0 ; pp< funs ;pp++){
	     add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
	     input_cnt++;
	     jsplot_cnt++;
	     }
	     fprintf(js_include_file,"if(typeof(all_jsplots) !== 'number'){var all_jsplots;};all_jsplots = %d;function redraw_userdraw(){redraw_jsplot();return;};",jsplot_cnt);
	    }
	    /* the canvasses range from 1000 ... 1008 */
	    if( reply_format == 0){reply_format = 29;}
	    reset();/* if command 'filled' / 'dashed' was given...reset all */
	    break;
	case MULTILABEL:
	/*
	 @ multilabel button_label_1,button_label_2,...,button_label_8,'stop drawing text'
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all labels (e.g. the value of input type 'button') will be set by the english names for the draw_primitives (like 'point','circle'...)
	 @ the ''stop drawing`` button text <b>must</b> be the last item on the ''multilabel`` -list <br>for example:<br><code>multilabel punten,lijnen,Stop met Tekenen<br>multidraw points,lines</code>
	 @ all buttons can be ''styled`` by using command <code>css</code><br><b>note:</b>If you want to add some CSS style to the buttons...<br>the id's of the ''draw buttons`` are their english command argument<br>(e.g. id="canvasdraw_points" for the draw points button).<br>the id of the ''stop drawing`` button is "canvasdraw_stop_drawing".<br>the id of the "OK" button is ''canvasdraw_ok_button``
	 @ wims will not check the amount or validity of your input
	 @ always use the same sequence as is used for ''multidraw``
	 @ if you don't want the controls, and want to write your own interface, set <code>multilabel NOCONTROLS</code>
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    if( strcasestr(temp,"NOCONTROLS") ){
	     int_data[MAX_MULTI_PRIMITIVES+1] = 1; /*int_data[25] = 1 --> 'no_controls = 1' in canvasmacro.c */
	     fprintf(js_include_file,"var multilabel = null;");
	    }
	    else
	    {
	     int_data[MAX_MULTI_PRIMITIVES+1] = 0; /* so DO use control buttons etc */
	     temp = str_replace(temp,",","\",\"");
	     fprintf(js_include_file,"var multilabel = [\"%s\"];",temp);
	    }
	    break;
	case MULTILINEWIDTH:
	/*
	 @ multilinewidth linewidth_1,linewidth_2,...,linewidth_8
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all line widths will be set by a previous command ''linewidth int``
	 @ use these up to 7 different line widths for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
	 @ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    fprintf(js_include_file,"var multilinewidth = [\"%s\"];",temp);
	    break;
	case MULTIFILL:
	/*
	 @ multifill 0,0,1,0,1,0,0
	 @ meaning draw objects no. 3 and 5, in the list of command ''multifill``, are filled (if the object is fillable...and not a line,segment,arrow or point...)
	 @ using a fillpattern: multifill 0,1,2,5,3,4<br>meaning: first object is not filled...second object is solid color filled...2=grid | 3=hatch | 4=diamond | 5=dot
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all objects -except point|points- will be set ''not filled``... unless a command <code>filled</code> was given before command <code>multifill</code>
	 @ only suitable for draw_primitives like ''circle | circles``, ''triangle | triangles``, ''rect | rects``, ''poly[3-9] | polys[3-9]`` and ''polygon``
	 @ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_MULTI_PRIMITIVES){canvas_error("too many multidraw primitives...read the documentation...");}
		int_data[i] = (int)(get_real(infile,1)); /* 0,1,2,3,4,5 */
		if(int_data[i] < 0 || int_data[i] > 5 ){canvas_error("the only possible multifill arguments are: 0,1,2,3,4,5 ");}
		if(int_data[i] > 1 ){use_filled = 2;js_function[DRAW_FILL_PATTERN] = 1;}/* switch to trigger pattern filling */
		i++;
	    }
	    fprintf(js_include_file,"var multifill = %s ;",data2js_array(int_data,i-1));
	    break;

	case MULTIFILLCOLORS:
	/*
	 @ multifillcolors color_name_1,color_name_2,...,color_name_8
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all fillcolors (for circle | triangle | poly[3-9] | closedpoly ) will be ''stroke_color``, ''fill_opacity``
	 @ use these up to 6 colors for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_n</code>
	 @ wims will <b>not</b> check if the number of colours matches the amount of draw primitives...
	 @ always use the same sequence as is used for ''multidraw``
	 @ can also be used with command <a href='#userdraw'>userdraw clickfill,color</a> when more than one fillcolor is wanted.<br>in that case use for example <a href='#replyformat'>replyformat 10</a> ... reply=x1:y1:color1,x2:y2:color2...<br>the colors will restart at the first color, when there are more fill-clicks than multi-fill-colors<br>if more control over the used colours is wanted, see command <a href='#colorpalette'>colorpalette color1,color2...</a>
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    fprintf(js_include_file,"var multifillcolors = [");
	    while( ! done ){
	        temp = get_color(infile,1);
		fprintf(js_include_file,"\"%s\",",temp);
	    }
	    fprintf(js_include_file,"\"0,0,0\"];");/* add black to avoid trouble with dangling comma... */
	    break;

	case MULTIFILLOPACITY:
	/*
	 @ multifillopacity fill_opacity_1,fill_opacity_2,...,fill_opacity_8
	 @ float values 0 - 1 or integer values 0 - 255
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all fill opacity_ will be set by previous command <code>opacity int,int</code> and keyword ''filled``
	 @ use these up to 7 different stroke opacities for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_y</code>
	 @ wims will not check the amount or validity of your input
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    fprintf(js_include_file,"var multifillopacity = [\"%s\"];",temp);
	    break;
	case MULTISNAPTOGRID:
	/*
	 @ multisnaptogrid 0,1,1
	 @ alternative: multisnap
	 @ meaning draw objects no. 2 (circle) and 3 (segments), in the list of command like <code>multifill points,circle,segments</code>, will snap to the xy-grid (default 1 in x/y-coordinate system: see command <a href='#snaptogrid'>snaptogrid</a>)
	 @ freehand drawing...specify precision for reply: all objects snap to grid <code>multisnaptogrid 1,1,1,...</code>
	 @ only the xy-values snap_to_grid: all objects snap to grid <code>multisnaptogrid 1,1,1,...</code>
	 @ only the x-values snap_to_grid: all objects snap to x-grid <code>multisnaptogrid 2,2,2,...</code>
	 @ only the y-values snap_to_grid: all objects snap to y-grid <code>multisnaptogrid 3,3,3,...</code>
	 @ if <a href='#snaptopoints'>snaptopoints</a> is defined: all objects snap to points <code>multisnaptogrid 4,4,4,...</code> <br><b>make sure to define the points to snap on...</b> use command <a href='#snaptopoints'>snaptopoints</a>
	 @ <code>multisnaptogrid 0,1,2,3,4<br>multidraw text,arrow,line,circle,image</code><br>''text`` is free hand, ''arrow`` is snap to grid, ''line`` is snap to x-grid, ''circle`` is snap to y-grid, ''image`` is snap to points defined by command <a href='#snaptopoints'>snaptopoints</a>
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ attention: if not set all objects will be set ''no snap``... unless a generic command ''snaptogrid`` was given before command ''multidraw``
	 @ commands <a href='#xsnaptogrid'>xsnaptogrid</a>, <a href='#ysnaptogrid'>ysnaptogrid</a>, <a href='#snaptofunction'>snaptofunction</a> are <b>not</b> supported amd only functional for command <a href='#userdraw'>userdraw</a>
	 @ always use the same sequence as is used for ''multidraw``
	 @ wims will <b>not</b> check if the number of 0 or 1's matches the amount of draw primitives...
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    fprintf(js_include_file,"var multisnaptogrid = [%s];",temp);
	    reset();/* if command 'dashed' was given...reset to not-dashed */
	    break;
	case MULTISTROKECOLORS:
	/*
	 @ multistrokecolors color_name_1,color_name_2,...,color_name_8
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all colors will be ''stroke_color``, ''stroke_opacity``
	 @ use these up to 6 colors for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
	 @ wims will <b>not</b> check if the number of colours matches the amount of draw primitives...
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1 ){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    fprintf(js_include_file,"var multistrokecolors = [");
	    while( ! done ){
	        temp = get_color(infile,1);
		fprintf(js_include_file,"\"%s\",",temp);
	    }
	    fprintf(js_include_file,"\"0,0,0\"];");/* add black to avoid trouble with dangling comma... */
	    break;
	case MULTISTROKEOPACITY:
	/*
	 @ multistrokeopacity stroke_opacity_1,stroke_opacity_2,...,stroke_opacity_7
	 @ float values 0 - 1 or integer values 0 - 255
	 @ use before command <a href='#multidraw'>multidraw</a>
	 @ if not set all stroke opacity_ will be set by previous command <code>opacity int,int</code>
	 @ use these up to 7 different stroke opacities for the draw primitives used by command <code>multidraw obj_type_1,obj_type_2...obj_type_7</code>
	 @ wims will not check the amount or validity of your input
	 @ always use the same sequence as is used for ''multidraw``
	*/
	    if( use_tooltip == 1){canvas_error("command 'multidraw' is incompatible with command 'intooltip tip_text'");}
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    fprintf(js_include_file,"var multistrokeopacity = [\"%s\"];",temp);
	    break;

	case MULTIUSERINPUT:
	/*
	@ multiuserinput 0,1,1,0
	@ alternative: multiinput
	@ meaning, when the command ''multidraw`` is used <code>multidraw circles,points,lines,triangles</code><br>objects ''points`` and ''lines`` may additionally be ''drawn`` by direct input (inputfields)<br/>all other objects must be drawn with a mouse
	@ in case of circle | circles a third inputfield for Radius (R) is added. The radius must be in the x/y coordinate system (x-range) and <b>not</b> in pixels...students don't think in pixels.<br>note: R-values will not snap-to-grid
	@ in case of line(s) | segment(s) | arrow(s) the user should write <b>x1:y1</b> in the first inputfield and <b>x2:y2</b> in the second.<br>These ''hints`` are pre-filled into the input field.<br>Other coordinate delimiters are '';`` and '',`` e.g. <b>x1;y1</b> or <b>x1,y1</b>.<br>An error message (alert box) will popup when things are not correctly...
	@ in case of a triangle | poly3, three inputfields are provided.
	@ in case of ''text`` and ''multiuserinput=1, 3`` inputfields will be shown: ''x,y,text``
	@ in case of ''text`` and ''multiuserinput=0, 1`` inputfield will be shown: text ... a mouse click will place the text on the canvas.
	@ may be styled using command <a href="#css">css</a>
	@ an additional button ''stop drawing`` may be used to combine userbased drawings with ''drag&and;drop`` or ''onclick`` elements
	@ when exercise if finished (status=done) the buttons will not be shown.<br>To override this default behaviour use command / keyword ''status``
	@ use before command <a href='#multidraw'>multidraw</a>
	@ always use the same sequence as is used for ''multidraw``
	*/
	    /* simple rawmath and input check */
	    js_function[JS_SAFE_EVAL] = 1;
	    temp = get_string(infile,1);
	    temp = str_replace(temp,",","\",\"");
	    fprintf(js_include_file,"var multiuserinput = [\"%s\"];",temp);
	    break;
	case NORESET:
	/*
	@ noreset
	@ alternative: killreset
	@ keyword
	@ may come in handy if canvas script code is generated using loops
	@ if used the following properties will remain to be valid<br><ul><li>filled</li><li>dash settings</li><li>onclick or drag settings</li><li>centering or offset</li></ul>
	@ if used again, these properies will be reset to the default values and normal behaviour is continued (e.g. the above properties will be reset after 'use' on a canvas object)
	@ etc etc
	@ commands <a href='#slider'>slider</a>, <a href='#linear'>linear</a>, <a href='#rotate'>rotate</a>, <a href='#translate'>translate</a>, <a href='#affine'>affine</a> are always active until the 'kill' commands are given: <br><a href='#killlinear'>killlinear</a>, <a href='#killrotate'>killrotate</a>, <a href='#killtranslate'>killtranslate</a> and <a href='#killaffine'>killaffine</a>
	@ commands like 'opacity', 'linewidth', 'fontsize', 'fontfamily' are only changed when redefined again
	@%noreset%size 400,400%xrange -10,10%yrange -10,10%noreset%drag xy%linewidth 4%filled%rect -4,4,-2,2,blue%triangle -3,-3,0,0,1,-5,green%circle 0,0,50,orange%noreset%rect 2,4,4,2,blue
	@%noreset_oefgraduation%size 800,100%xrange 0,11%yrange -1,1%hline 0,0,black%parallel 0,0,0,0.5,1,0,11,blue%noreset%onclick%centered%text black,1,0.6,large,20%text black,2,0.6,large,30%text black,3,0.6,large,40%text black,4,0.6,large,50%text black,5,0.6,large,60%text black,6,0.6,large,70%text black,7,0.6,large,80%text black,8,0.6,large,90%text black,9,0.6,large,100%text black,10,0.6,large,110
	*/
	    if(no_reset == FALSE){no_reset = TRUE;}else{no_reset = FALSE;reset();}
	    break;
	case NOXAXIS:
	/*
	@ noxaxis
	@ keyword
	@ if set, the automatic x-axis numbering will be ignored
	@ use command <a href="#axis">axis</a> to have a visual x/y-axis lines (see command <a href="#grid">grid</a>)
	@ to be used before command grid (see <a href="#grid">command grid</a>)
	*/
	    fprintf(js_include_file,"x_strings = {};x_strings_up = [];\n");
	    use_axis_numbering = -1;
	    break;
	case NOYAXIS:
	/*
	@ noyaxis
	@ keyword
	@ if set, the automatic y-axis numbering will be ignored
	@ use command <a href="#axis">axis</a> to have a visual x/y-axis lines (see command <a href="#grid">grid</a>)
	@ to be used before command grid (see <a href="#grid">command grid</a>)
	*/
	    fprintf(js_include_file,"y_strings = {};\n");
	    break;
	case NUMBERLINE:
	/*
	@ numberline x0,x1,xmajor,xminor,y0,y1
	@ numberline is using xrange/yrange system for all dimensions
	@ multiple numberlines are allowed ; combinations with command <a href='#grid'>grid</a> is allowed; multiple commands <a href='#xaxis'>xaxis numbering</a> are allowed
	@ x0 is start x-value in xrange
	@ x1 is end x-value in xrange
	@ xmajor is step for major division
	@ xminor is divisor of xmajor; using small (30% of major tick) tick marks: this behaviour is ''hardcoded``
	@ is xminor is an even divisor, an extra tickmark (60% of major tick) is added to the numberline: this behaviour is ''hardcoded``
	@ y0 is bottom of numberline; y1 endpoint of major tics
	@ use command <a href="#linewidth">linewidth</a> to control appearance
	@ use <a href="#strokecolor">strokecolor</a> and <a href="#opacity">opacity</a> to controle measure line
	@ for all ticks linewidth and color / opacity are identical.
	@ if command <a href="#xaxis">xaxis</a> or <a href="#xaxisup">xaxisup</a> is not defined, the labeling will be on major ticks: x0...x1
	@ use <a href="#fontfamily">fontfamily</a> and <a href="#fontcolor">fontcolor</a> to control fonts settings
	@ may be used together with <a href="#userdraw">userdraw</a>, <a href="#multidraw">multidraw</a> and <a href="#drag">user drag</a> command family for the extra object drawn onto the numberline
	@ <a href="#snaptogrid">snaptogrid, snaptopoints etc</a> and <a href="#zoom">zooming and panning</a> is supported
	@ onclick and dragging of the numberline are not -yet- supported
	@ note: in case of multiple numberlines, make sure the numberline without special x-axis numbering (e.g. ranging from xmin to xmax) comes first !
	@%numberline%size 400,400%xrange -10,10%yrange -10,10%precision 1%strokecolor black%numberline -8,8,1,6,-4,-3.5%strokecolor red%xaxis -4:AA:-2:BB:2:CC:4:DD%numberline -8,8,1,2,4,4.5%strokecolor green%xaxisup -4:AAA:-2:BBB:2:CCC:4:DDD%numberline -8,8,1,3,2,2.5%strokecolor blue%xaxis -4:AAAA:-2:BBBB:2:CCCC:4:DDDD%numberline -8,8,1,4,0,0.5%strokecolor brown%xaxis -4:AAAAA:-2:BBBBB:2:CCCCC:4:DDDDD%numberline -8,8,1,5,-2,-1.5%zoom red
	*/
	    js_function[DRAW_NUMBERLINE] = 1;
	    for(i=0;i<6;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break;/* xmin */
		    case 1: double_data[1] = get_real(infile,0);break;/* xmax */
		    case 2: double_data[2] = get_real(infile,0);break;/* xmajor */
		    case 3: double_data[3] = get_real(infile,0);break;/* xminor */
		    case 4: double_data[4] = get_real(infile,0);break;/* ymin */
		    case 5: double_data[5] = get_real(infile,1);/* ymax */
			    /*
			    var draw_numberline%d = function(canvas_type,xmin,xmax,xmajor,xminor,ymin,ymax,linewidth,strokecolor,strokeopacity,fontfamily,fontcolor);
			    */
			    fprintf(js_include_file,"snap_x = %f;snap_y = %f;",double_data[2] / double_data[3],double_data[5] - double_data[4] );
			    string_length = 1 + snprintf(NULL,0,"\ndraw_numberline(%d,%d,%f,%f,%f,%f,%f,%f,%d,\"%s\",%f,\"%s\",\"%s\",%d);   ",NUMBERLINE_CANVAS+numberline_cnt,use_axis_numbering,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],line_width,stroke_color,stroke_opacity,font_family,font_color,precision);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"\ndraw_numberline(%d,%d,%f,%f,%f,%f,%f,%f,%d,\"%s\",%f,\"%s\",\"%s\",%d);  ",NUMBERLINE_CANVAS+numberline_cnt,use_axis_numbering,double_data[0],double_data[1],double_data[2],double_data[3],double_data[4],double_data[5],line_width,stroke_color,stroke_opacity,font_family,font_color,precision);
			    add_to_buffer(tmp_buffer);
			    numberline_cnt++;
			    break;
		    default:break;
		}
	    }
	    reset();
	    break;

	case OBABEL:

	/*
	@ obabel x,y,type input,molecule smiles-code or file location, extra arguments,extra arguments,...
	@ will call the ''obabel`` program, if installed.
	@ output will be an svg file
	@ see documentation of obabel for special keys
	@ command <a href='#affine'>affine</a> will produce CSS3 matrix transformations
	@ command <a href='#rotate'>rotate</a> will rotate the object
	@ can be set onclick: <code>javascript:read_dragdrop();</code> will return click numbers of mathml-objects<br>if 4 clickable object are drawn, the reply could be 1,0,1,0 ... meaning clicked on the first and third object
	@ can be set draggable: <code>javascript:read_dragdrop();</code> will return all coordinates in the same order as the canvas script: unmoved object will have their original coordinates...
	@ snaptogrid is supported...snaptopoints will work, but use with care...due to the primitive dragging<br>technically: the dragstuff library is not used...the mathml is embedded in a new div element and not in the html5-canvas
	@ external files may be loaded if they are present on the server or in the modules <br>for example:<br> obabel 0,0,mol,&#36;module_dir/caffeine.mol,-P100,-xb none
	@%obabel_smi%size 400,400%xrange -10,10%yrange -10,10%fillcolor green%drag xy%centered%obabel 0,0,smi,-:c1cFccc1cc,-xb none,-xB blue,-xi,-xt,-xa,-xX,-xP180,-h
	*/
	    js_function[DRAW_XML] = 1;
	    for(i=0;i<4;i++){
		switch(i){
		    case 0: double_data[0]=get_real(infile,0);break; /* x in x/y-range coord system -> pixel width */
		    case 1: double_data[1]=get_real(infile,0);break; /* y in x/y-range coord system  -> pixel height */
		    case 2: URL = get_string_argument(infile,0);break;
		    case 3:
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		    temp = getSVGMOL(URL,get_string(infile,1));
		    decimals = find_number_of_digits(precision);
		    if(use_affine == TRUE ){ transform(2,2);}
		    if( use_offset != 0 || drag_type != -1 ){int_data[2] = 1;}else{int_data[2] = 0;} /* only centered or not-centered */
		    int_data[0] = x2px(double_data[0]);
		    int_data[1] = y2px(double_data[1]);
		    if( use_slider != -1 && onclick == 0 ){ onclick = 3;}/* no drag&onclick but slideable */
		    if( use_slider != -1 && drag_type > 0 ){ onclick = 5;}/* slider+drag*/
		    if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\"","'"); }
		    string_length = 1 + snprintf(NULL,0,"var draw_xml%d = {id:%d,type:'svg',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,  "var draw_xml%d = {id:%d,type:'svg',x:[%d],y:[%d],mathml:\"%s\",drag_type:%d,onclick:%d,object_cnt:%d,stroke_color:\"%s\",stroke_opacity:%.2f,fill_color:\"%s\",fill_opacity:%.2f,use_center:%d,use_snap:%d,angle:%f,fontfamily:\"%s\",transform:%s,use_affine:%d,offset:[0,0],use_slider:%s,rotation_center:%s,once:true};slidergroup[%d] = null;draw_xml(draw_xml%d);\n",drawxml_cnt,drawxml_cnt,int_data[0],int_data[1],temp,drag_type,onclick,object_cnt,stroke_color,stroke_opacity,fill_color,fill_opacity,int_data[2],use_snap,angle,font_family,doubledata2js_array(affine_matrix,6,decimals),use_affine,my_sliders,rotation_center,object_cnt,drawxml_cnt);
		    add_to_buffer(tmp_buffer);
		    if(onclick != 0 ){object_cnt++;}
		    drawxml_cnt++;/* keeps track on imported img,div,p,span,mathml,svg */
		    break;
		    default:break;
		}
	    }
	    reset();
	break;

	case OPACITY:
	/*
	@ opacity [0-255],[0-255]
	@ opacity [0.0 - 1.0],[0.0 - 1.0]
	@ alternative: transparent
	@ first item is stroke opacity, second is fill opacity
	@%opacity%size 400,400%xrange -10,10%yrange -10,10%opacity 255,0%fcircle -10,0,100,blue%opacity 250,50%fcircle -5,0,100,blue%opacity 200,100%fcircle 0,0,100,blue%opacity 150,150%fcircle 5,0,100,blue%opacity 100,200%fcircle 10,0,100,blue
	*/
	    for(i = 0 ; i<2;i++){
		switch(i){
		    case 0: double_data[0]= get_real(infile,0);break;
		    case 1: double_data[1]= get_real(infile,1);break;
		    default: break;
		}
	    }
	    if( double_data[0] > 255 ||  double_data[1] > 255  || double_data[0] < 0 || double_data[1] < 0 ){ canvas_error("opacity [0 - 255], [0 - 255] ");}/* typo or non-RGB ? */
	    if( double_data[0] > 1 ){ stroke_opacity = (double) (0.0039215*double_data[0]); }else{ stroke_opacity = 0.0;} /* 0.0 - 1.0 */
	    if( double_data[1] > 1 ){ fill_opacity = (double) (0.0039215*double_data[1]); }else{ fill_opacity = 0.0;} /* 0.0 - 1.0 */
	    break;

	case ONCLICK:
	/*
	 @ onclick
	 @ keyword (no arguments required)
	 @ if the next object is clicked, its ''object onclick_or_drag sequence number`` in fly script is returned by <code>javascript:read_canvas();</code>
	 @ onclick seqeuence numbering starts at ''0``, e.g. if there are 6 objects set onclick, the first onclick object will have id-number ''0``, the last id-number ''5``
	 @ line based objects will show an increase in line width<br>font based objects will show the text in ''bold`` when clicked.
	 @ the click zone (accuracy) is determined by 2&times; the line width of the object
	 @ onclick and <a href="#drag">drag x|y|xy</a> may be combined in a single flyscript (although a single object can <b>not</b> be onclick and draggable at the same time...)
	 @ note: not all objects may be set onclick
	 @%onclick%size 400,400%xrange -10,10%yrange -10,10%opacity 255,60%linewidth 3%onclick%fcircles blue,-3,3,1,1,2,2,3,1,1%onclick%ftriangles red,-4,-4,-4,0,-3,-2,0,0,4,0,2,-4%onclick%frects green,-4,4,-2,2,1,-1,3,-4
	*/
	    fprintf(js_include_file,"use_dragdrop_reply = true;");
	    onclick = 1;
	    use_dragstuff=2;
	    js_function[INTERACTIVE] = 1;

	    break;

	case PARALLEL:
	/*
	 @ parallel x1,y1,x2,y2,dx,dy,n,[colorname or #hexcolor]
	 @ affine transformations should be identical to flydraw
	 @ in case of <a href='#rotate'>rotation</a>  or <a href='#affine'>affine transformation </a>, command parallel will produce <em>n</em> individual segments, and these may be set ''onclick`` or ''drag xy`` individually.
	 @ in case of <em>no rotation or transformations</em> the lines can not be set ''onclick`` or ''drag xy``.
	 @ note: a large number of parallel lines (large <em>n</em>) may result in a canvasdraw error (...simplify your script...it produces too many lines...)
	 @%parallel_click%size 400,400%xrange -10,10%yrange -10,10%parallel -5,5,-4,-5,0.25,0,40,red%rotate 45%onclick%parallel -5,5,-4,-5,0.25,0,40,blue
	 @%parallel%size 400,400%xrange -10,10%yrange -10,10%parallel -5,5,-4,-5,0.25,0,40,red
	*/
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    if( use_rotate == TRUE || use_affine == TRUE ){
		for( i = 0;i < 8; i++ ){
	    	    switch(i){
			case 0: double_data[0] = get_real(infile,0);break; /* x1-values */
			case 1: double_data[1] = get_real(infile,0);break; /* y1-values */
			case 2: double_data[2] = get_real(infile,0);break; /* x2-values */
			case 3: double_data[3] = get_real(infile,0);break; /* y2-values */
			case 4: double_data[4] = get_real(infile,0);break; /* xv  */
			case 5: double_data[5] = get_real(infile,0);break; /* yv  */
			case 6: int_data[0] = (int) (get_real(infile,0));break; /* n  */
			case 7: stroke_color=get_color(infile,1);break;/* name or hex color */
			default: break;
		    }
		}
		double_data[6] = double_data[0]; /* x1 */
	        double_data[7] = double_data[1]; /* y1 */
	        double_data[8] = double_data[2]; /* x2 */
	        double_data[9] = double_data[3]; /* y2 */
	        for(i = 0 ; i < int_data[0] ; i++){
	    	    double_data[0] = double_data[6] + i*double_data[4];
	    	    double_data[1] = double_data[7] + i*double_data[5];
	    	    double_data[2] = double_data[8] + i*double_data[4];
	    	    double_data[3] = double_data[9] + i*double_data[5];
	    	    if(use_rotate == TRUE ){ rotate(4,angle,rotationcenter,2);}
	    	    if(use_affine == TRUE ){ transform(4,2);}
	    	    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    	    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    	    add_to_buffer(tmp_buffer);
	    	    if(onclick != 0){object_cnt++;}
	        }
	        dragstuff[4] = 1;
	    }
	    else  /* use the old parallel version: calculations in javascript */
	    {
		for( i = 0;i < 8; i++ ){
		    switch(i){
			case 0: double_data[0] = get_real(infile,0);break; /* x1-values */
			case 1: double_data[1] = get_real(infile,0);break; /* y1-values */
			case 2: double_data[2] = get_real(infile,0);break; /* x2-values */
			case 3: double_data[3] = get_real(infile,0);break; /* y2-values */
			case 4: double_data[4] = xmin + get_real(infile,0);break; /* xv  */
			case 5: double_data[5] = ymax + get_real(infile,0);break; /* yv  */
			case 6: int_data[0] = (int) (get_real(infile,0));break; /* n  */
			case 7: stroke_color=get_color(infile,1);/* name or hex color */
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,11,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d,%d],[%d,%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,11,[%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f],[%d,%d,%d],[%d,%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			break;
			default: break;
		    }
		    dragstuff[11] = 1;
		}
	    }
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case PLOTSTEPS:
	    /*
	     @ plotsteps a_number
	     @ default 150
	     @ only used for commands <a href="#curve">curve / plot</a> and <a href="#levelcurve">levelcurve</a>
	     @ use with care !
	    */
	    plot_steps = (int) (get_real(infile,1));
	    break;

	case POINT:
	/*
	@ point x,y,color
	@ draw a single point at (x;y) in color 'color'
	@ use command <code>linewidth int</code> to adjust size
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@ will not resize on zooming (command <code>circle x,y,r,color</code> will resize on zooming)
	@ attention: in case of command <a href="#rotate">rotate angle</a> a point has rotation center (0:0) in x/y-range
	@%point%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 1%onclick%point 0,0,red%linewidth 2%onclick%point 1,1,blue%linewidth 3%onclick%point 3,3,green%linewidth 4%point 4,4,orange
	*/
    	    for(i=0;i<3;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: stroke_color = get_color(infile,1);/* name or hex color */
    		    if(use_rotate == TRUE ){rotate(2,angle,rotationcenter,2);}
    		    if(use_affine == TRUE ){ transform(2,2);}
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

		    decimals = find_number_of_digits(precision);
		    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.*f],[%.*f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],1.5*line_width,line_width,1.5*line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.*f],[%.*f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],1.5*line_width,line_width,1.5*line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		    add_to_buffer(tmp_buffer);
		    /* object_cnt++; */
		    if(onclick != 0){object_cnt++;}
		    break;
		    default: break;
		}
	    }
	    dragstuff[2] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case POINTS:
	/*
	@ points color,x1,y1,x2,y2,...,x_n,y_n
	@ draw multiple points at given coordinates in color 'color'
	@ use command <code>linewidth int</code> to adjust size
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	@ attention: in case of command <a href="#rotate">rotate angle</a> the points have rotation center (0:0) in x/y-range
	@%points_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%snaptogrid%linewidth 1%drag xy%points red,0,0,1,1,2,2,3,3%drag x%points blue,0,1,1,2,2,3,3,4
	@%points_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,255%linewidth 1%onclick%points red,0,0,1,1,2,2,3,3%onclick%points blue,0,1,1,2,2,3,3,4
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
    	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
    	    if(use_affine == TRUE ){ transform(i-1,2);}
    	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.*f],[%.*f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],1.5*line_width,line_width,1.5*line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,2,[%.*f],[%.*f],[%.2f],[%d],%.2f,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],1.5*line_width,line_width,1.5*line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		/* object_cnt++; */
		if(onclick != 0){object_cnt++;}
	    }
	    dragstuff[2] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case POLY:
	/*
	@ poly color,x1,y1,x2,y2...x_n,y_n
	@ polygon color,x1,y1,x2,y2...x_n,y_n
	@ draw closed polygon
	@ use command ''fpoly`` to fill it or use keyword <a href='#filled'>filled</a>
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%polygon_1%size 400,400%xrange -10,10%yrange -10,10%opacity 255,25%fillcolor orange%filled%linewidth 2%drag xy%snaptogrid%poly blue,0,0,1,3,3,1,2,4,-1,3
	@%polygon_2%size 400,400%xrange -10,10%yrange -10,10%opacity 255,25%fillcolor orange%filled%linewidth 1%onclick%poly green,0,0,1,3,3,1,2,4,-1,3
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    i=0;
	    c=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		for( c = 0 ; c < 2; c++){
		    if(c == 0 ){
			double_data[i] = get_real(infile,0);
			i++;
		    }
		    else
		    {
			double_data[i] = get_real(infile,1);
			i++;
		    }
		}
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    /* draw path:  closed & optional filled */
	    decimals = find_number_of_digits(precision);
	    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    add_to_buffer(tmp_buffer);
	    if(onclick != 0){object_cnt++;}
	    reset();
	    dragstuff[5] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case POLYLINE:
	/*
	@ polyline color,x1,y1,x2,y2...x_n,y_n
	@ brokenline color,x1,y1,x2,y2...x_n,y_n
	@ path color,x1,y1,x2,y2...x_n,y_n
	@ remark: there is <b>no</b> command polylines | brokenlines | paths ... just use multiple commands <code>polyline, x1,y1,x2,y2...x_n,y_n</code>
	@ remark: there are commands <code>userdraw path(s),color</code> and <code>userdraw polyline,color</code>... these are two entirely different things ! the path(s) userdraw commands may be used for freehand drawing(s)<br>the polyline userdraw command is analogue to this polyline|brokenline command
	@ the command interconnects the points in the given order with a line (canvasdraw will not close the drawing: use command <a href="#poly">polygon</a> for this)
	@ use command <a href='#segments'>segments</a> for a series of segments. These may be clicked/dragged individually
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%polyline_1%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%snaptogrid%polyline blue,0,0,1,3,3,1,2,4,-1,3
	@%polyline_2%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%onclick%polyline green,0,0,1,3,3,1,2,4,-1,3
	*/

	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    i=0;
	    c=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		for( c = 0 ; c < 2; c++){
		    if(c == 0 ){
			double_data[i] = get_real(infile,0);
			i++;
		    }
		    else
		    {
			double_data[i] = get_real(infile,1);
			i++;
		    }
		}
	    }

	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    /* draw path: not closed & not filled */
    	    decimals = find_number_of_digits(precision);
	    string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,i,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
	    add_to_buffer(tmp_buffer);
	    if(onclick != 0){object_cnt++;}
	    /* object_cnt++;*/
	    reset();
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case POPUP:
	    /*
	    @ popup
	    @ keyword (no arguments)
	    @ if fly-script starts with keyword ''popup``, the canvas image will be exclusively in a popup window (xsize px &times; ysize px)
	    @ if keyword ''popup`` is used after command <code>size xsize,ysize</code> the canvas will also be displayed in a popup window with size ''xsize &times; ysize``
	    @ the popup window will be embedded into the page as a normal image, when ''status=done``; override with keyword <a href="#status">nostatus</a>
	    @ to access the read_canvas and read_dragdrop functions in a popup window, use:<br> <code> function read_all(){<br> if( typeof popup !== 'undefined' ){<br> var fun1 = popup['read_dragdrop'+canvas_scripts[0]];<br>var fun2 = popup['read_canvas'+canvas_scripts[0]];<br> popup.close();<br> return "dragdrop="+fun1()+"\\ncanvas="+fun2();<br> };</code>
	    @ to set a canvasdraw produced <a href="#clock">clock</a> or multiple clocks...use something like: <code>popup.set_clock(clock_id,type,diff);</code> as js-function for a button (or something else) in your document page.<br>where in <b>clock_id</b> starts with 0 for the first clock<br><b>type</b> is 1 for Hours,2 for Minutes and 3 for Seconds<br><b>diff</b> is the increment (positive or negative) per click
	    @%popup%popup%size 400,400%xrange -2*pi,2*pi%yrange -5,5%precision 0%axis%axisnumbering%opacity 100,190%grid 1,1,grey,2,2,5,black%linewidth 4%fillcolor blue%trange -pi,pi%animate%linewidth 1%precision 1000%jsplot red,4*cos(2*x),2*sin(3*x-pi/6)%strokecolor green%functionlabel H(x)=%userinput function
	    */
	    use_tooltip = 2;
	    break;

	case PROTRACTOR:
	/*
	 @ protractor x,y,x_width,type,mode,use_a_scale
	 @ x,y are the initial location
	 @ x_width: give the width in x-coordinate system (e.g. not in pixels !)
	 @ type = 1: a triangle range 0 - 180<br>type = 2: a circle shape 0 - 360
	 @ mode: use -1 to set the protractor interactive (mouse movement of protractor)<br>use mode = '0&deg; - 360&deg;' to set the protractor with a static angle of some value
	 @ if the value of the user_rotation angle is to be shown...use command <a href='#display'>display degree,color,fontsize</a><a href='#display'>display radian,color,fontsize</a>
	 @ use_scale = 1: the protractor will have some scale values printed; use_scale=0 to disable
	 @ the rotating direction of the mouse around the protractor determines the clockwise/ counter clockwise rotation of the protractor...
	 @ commands ''stroke_color | fill_color | linewidth | opacity | font_family`` will determine the looks of the protractor.
	 @ default replyformat: reply[0] = x;reply[1] = y;reply[2] = angle_in_radians<br>use command ''precision`` to set the reply precision.
	 @ if combined with a ruler, use replyformat = 32
	 @ command <code>snap_to_grid</code> may be used to assist the pupil at placing the protractor
	 @ when using command ''zoom``, pay <b>attention</b> to the size and symmetry of your canvas<br>...to avoid a partial image, locate the start position near the center of the visual canvas<br>technical: the actual ''protractor`` is just a static generated image in a new canvas-memory<br>This image is only generated once, and a copy of its bitmap is translated & rotated onto the visible canvas.<br>That is the reason for the ''high-speed dragging and rotating``.<br>I've limited its size to xsize &times; ysize e.g. the same size as the visual canvas...
	 @ only one protractor allowed (for the time being)
	 @ usage: first left click on the protractor will activate dragging;<br>a second left click will activate rotating (just move mouse around)<br>a third click will freeze this position and the x/y-coordinate and angle in radians will be stored in reply(3)<br>a next click will restart this sequence...
	 @%protractor%size 400,400%xrange -5,10%yrange -5,10%hline 0,0,black%vline 0,0,black%fillcolor orange%opacity 255,40%protractor 2,-2,6,0,-1,1,1%mouse red,22
	*/
	    for( i = 0;i < 6; i++ ){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* x-center */
		    case 1: double_data[1] = get_real(infile,0);break; /* y-center */
		    case 2: double_data[2] = get_real(infile,0);break; /* x-width */
		    case 3: int_data[0] = (int)(get_real(infile,0));break; /* type: 1==triangle 2 == circle */
		    case 4: int_data[1] = (int)(get_real(infile,0));break; /* passive mode == 0; active mode == -1 */
		    case 5: int_data[2] = (int)(get_real(infile,1)); /* use scale */
		    decimals = find_number_of_digits(precision);
		    if( int_data[1] < 0 ){ js_function[JS_FIND_ANGLE] = 1;}
	            add_js_protractor(int_data[0],double_data[0],double_data[1],double_data[2],font_family,stroke_color,stroke_opacity,fill_color,fill_opacity,line_width,int_data[2],int_data[1],use_snap);

	            string_length = 1 + snprintf(NULL,0,";protractor%d(); ",canvas_root_id);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,";protractor%d(); ",canvas_root_id);
		    add_to_buffer(tmp_buffer);
		    reply_precision = precision;
		    /* no reply from protractor if non-interactive */
		    if( reply_format == 0 && int_data[1] == -1 ){reply_format = 30;}
		    js_function[INTERACTIVE] = 1;
		    break;
		    default: break;
		}
	    }
	    break;

	case PIXELS:
	/*
	@ pixels color,x1,y1,x2,y2,x3,y3...
	@ draw rectangular "points" with diameter 1 pixel
	@ pixels can <b>not</b> be dragged or clicked
	@ "pixelsize = 1" may be changed by command <code>pixelsize int</code>
	@%pixels%size 400,400%opacity 255,255%pixelsize 5%pixels red,1,1,2,2,3,3,4,4,5,5,10,10,20,20,30,30,40,40,50,50,60,60,70,70,80,80,90,90,100,100,120,120,140,140,160,160,180,180,200,200,240,240,280,280,320,320,360,360,400,400%#NOTE pixelsize=5...otherwise you will not see them clearly...
	*/
	    js_function[DRAW_PIXELS] = 1;
	    stroke_color=get_color(infile,0);
	    i=0;
	    c=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		for( c = 0 ; c < 2; c++){
		    if(c == 0 ){
			double_data[i] = get_real(infile,0);
			i++;
		    }
		    else
		    {
			double_data[i] = get_real(infile,1);
		    }
		}
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    decimals = find_number_of_digits(precision);
	    /*  *double_xy2js_array(double xy[],int len,int decimals) */
	    string_length = 1 + snprintf(NULL,0,  "draw_setpixel(%s,\"%s\",%.2f,%d);\n",double_xy2js_array(double_data,i,decimals),stroke_color,stroke_opacity,pixelsize);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,"draw_setpixel(%s,\"%s\",%.2f,%d);\n",double_xy2js_array(double_data,i,decimals),stroke_color,stroke_opacity,pixelsize);
	    add_to_buffer(tmp_buffer);
	    reset();
	    break;

	case PIXELSIZE:
	/*
	@ pixelsize int
	@ in case you want to deviate from default pixelsize = 1(...)
	@ pixelsize 100 is of course a filled rectangle 100px &times; 100px
	*/
	    pixelsize = (int) get_real(infile,1);
	break;

	case PIECHART:
	/*
	@ piechart xc,yc,radius,'data+colorlist'
	@ (xc: yc) center of circle diagram in xrange/yrange
	@ radius in pixels
	@ data+color list: a colon separated list of raw data and corresponding colours<br>canvasdraw will not check validity of colornames...<br>in case of trouble look into javascript debugging of your browser
	@ example data+colorlist: 32:red:65:green:23:black:43:orange:43:yellow:14:white
	@ the number of colors must match the number of data.
	@ if defined <a href='#fillpattern'>fillpattern some_pattern</a> then the pie pieces will be filled with the respective color and a fill pattern...<br>the pattern is cycled from the 4 pattern primitives: grid,hatch,diamond,dot,grid,hatch,diamond,dot,...
	@ use command <a href='#opacity'>opacity</a> to adjust fill_opacity of colours
	@ use command <a href='#legend'>legend</a> to automatically create a legend using the same colours as pie segments; unicode allowed in legend; expect javascript trouble if the amount of ''pie-slices``, ''pie-colors``, ''pie-legend-titles`` do not match, a javascript console is your best friend...<br>use command ''fontfamily`` to set the font of the legend.
	@ use command <a href='centered'>centered</a> to place <a href='#legend'>legend</a> text inside the piechart. The text is using the same color as the pie segment: use (fill) opacity to enhance visibility.
	@%piechart_1%size 300,200%xrange -10,10%yrange -10,10%legend cars:motorcycles:bicycles:trikes%opacity 255,120%piechart -5,0,75,22:red:8:blue:63:green:7:purple%
	@%piechart_2%size 200,200%xrange -10,10%yrange -10,10%fontfamily 16px Arial%centered%legend cars:motorcycles:bicycles:trikes%opacity 255,60%piechart 0,0,100,22:red:8:blue:63:green:7:purple
	*/
	    js_function[DRAW_PIECHART] = 1;
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x */
		    case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y  */
		    case 2: int_data[2] = (int)(get_real(infile,1));break;/* radius*/
		    case 3: temp = get_string(infile,1);
			    if( strstr( temp, ":" ) != 0 ){ temp = str_replace(temp,":","\",\"");}
			    string_length = 1 + snprintf(NULL,0,"draw_piechart(%d,%d,%d,%d,[\"%s\"],%.2f,%d,\"%s\",%d,%d);\n",PIECHART,int_data[0],int_data[1],int_data[2],temp,fill_opacity,legend_cnt,font_family,use_filled,use_offset);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_piechart(%d,%d,%d,%d,[\"%s\"],%.2f,%d,\"%s\",%d,%d);\n",PIECHART,int_data[0],int_data[1],int_data[2],temp,fill_opacity,legend_cnt,font_family,use_filled,use_offset);
			    add_to_buffer(tmp_buffer);
			   break;
		    default:break;
		}
	    }
	    reset();
	break;

	case RANGE:
	/*
	@ range xmin,xmax,ymin,ymax
	@ if not given: 0,xsize,0,ysize (eg in pixels)
	*/
	    for(i = 0 ; i<4; i++){
		switch(i){
		    case 0: xmin = get_real(infile,0);break;
		    case 1: xmax = get_real(infile,1);break;
		    case 2: ymin = get_real(infile,0);break;
		    case 3: ymax = get_real(infile,1);break;
		    default: break;
		}
	    }
	    if(xmin >= xmax){canvas_error(" xrange is not OK: xmin &lt; xmax !");}
	    if(ymin >= ymax){canvas_error(" yrange is not OK: ymin &lt; ymax !");}
	    fprintf(js_include_file,"var xmin = %f;var xmax = %f;var ymin = %f;var ymax = %f;",xmin,xmax,ymin,ymax);
	    found_size_command = found_size_command+2;
	    break;


	case RAYS:
	/*
	 @ rays color,xc,yc,x1,y1,x2,y2,x3,y3...x_n,y_n
	 @ draw rays in color 'color' and center (xc:yc)
	 @ may be set draggable or onclick (every individual ray)
	 @%rays_onclick%size 400,400%xrange -10,10%yrange -10,10%onclick%rays blue,0,0,3,9,-3,5,-4,0,4,-9,7,9,-8,1,-1,-9
	 @%rays_drag_xy%size 400,400%xrange -10,10%yrange -10,10%drag xy%rays blue,0,0,3,9,-3,5,-4,0,4,-9,7,9,-8,1,-1,-9
	*/
	    stroke_color=get_color(infile,0);
	    fill_color = stroke_color;
	    double_data[0] = get_real(infile,0);/* xc */
	    double_data[1] = get_real(infile,0);/* yc */
	    i=2;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("in command rays too many points / rays in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
	    fprintf(js_include_file,"/* double_data[%d] = %f */\n",i,double_data[i]);
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( i%2 != 0 ){canvas_error("in command rays: unpaired x or y value");}
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    for(c=2; c<i;c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[c],decimals,double_data[1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[c],decimals,double_data[1],decimals,double_data[c+1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		/* object_cnt++; */
	        if(onclick != 0){object_cnt++;}
	    }
	    reset();
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case RECT:
	/*
	@ rect x1,y1,x2,y2,color
	@ use command <code>frect x1,y1,x2,y2,color</code> for a filled rectangle
	@ use command/keyword <a href='#filled'>filled</a> before command <code>rect x1,y1,x2,y2,color</code>
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@ note: internally a rect is defined with 4 points. So when performing some affine transformation, other than translation, it will result in some morphing of the rectangle !<br/>this is a deviation of flydraw's rect&amp;affine
	@%rect%size 400,400%xrange -10,10%yrange -10,10%rect 0,0,4,-4,green%rect 0,5,4,1,red
	*/
	    for(i=0;i<5;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		    case 2:double_data[4] = get_real(infile,0);break; /* x-values */
		    case 3:double_data[5] = get_real(infile,0);break; /* y-values */
		    case 4:stroke_color = get_color(infile,1);/* name or hex color */
    			decimals = find_number_of_digits(precision);
    			double_data[2] = double_data[4];
    			double_data[3] = double_data[1];
    			double_data[6] = double_data[0];
    			double_data[7] = double_data[5];
    			/* using closed PATH (type=5) in stead of ctx.rect (type=1)!!!
    			    0,1 	2,3
			    6,7    	4,5
			    x = [0,2,4,6]
			    y = [1,3,5,7]
    			*/
	    		if(use_rotate == TRUE ){rotate(8,angle,rotationcenter,2);}
	    		if(use_affine == TRUE ){ transform(8,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[6],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],decimals,double_data[7],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[4],decimals,double_data[6],decimals,double_data[1],decimals,double_data[3],decimals,double_data[5],decimals,double_data[7],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			/* object_cnt++; */
			reset();
			break;
		}
	    }
	    dragstuff[5] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case RECTS:
	/*
	@ rects color,x1,y1,x2,y2,.....
	@ use command <code>frect color,x1,y1,x2,y2,.....</code> for a filled rectangle
	@ use command/keyword <a href='#filled'>filled</a> before command <code>rects color,x1,y1,x2,y2,....</code>
	@ use command <code>fillcolor color</code> before ''frects`` to set the fill colour.
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%rects%size 400,400%xrange -10,10%yrange -10,10%rects red,0,0,4,-4,0,5,4,1
	*/
    	/* using closed PATH (type=5) in stead of ctx.rect (type=1)!!!
    	0,1 	2,3 .....8,9	10,11.....
	6,7    	4,5 .....14,15	12,13.....
	x = [0,2,4,6,8,10,12,14...]
	y = [1,3,5,7,9,11,13,15...]
    	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+2],decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+1],decimals,double_data[c+3],decimals,double_data[c+3],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+2],decimals,double_data[c],decimals,double_data[c+1],decimals,double_data[c+1],decimals,double_data[c+3],decimals,double_data[c+3],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}
		/* object_cnt++; */
	    }
	    dragstuff[5] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    if(use_rotate == TRUE ){
	     rotate(i-1,angle,rotationcenter,2);
	    }
	    reset();
	    break;

	case REPLYFORMAT:
	/*
	@ replyformat number
	@ use number=-1 to deactivate the js-functions read_canvas() and read_dragdrop()
	@ default values should be fine !
	@ use command <code>precision [0,1,10,100,1000,10000...]</code> before command ''replyformat`` to set the desired number of decimals in the student reply / drawing
	@ the last value for ''precision int`` will be used to calculate the reply coordinates, if needed (read_canvas();)
	@ choose<ul><li>replyformat 1: <code>x1,x2,x3,x4....x_n<br>y1,y2,y3,y4....y_n</code> x/y in pixels</li><li>replyformat 2: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 3: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n<br> r1,r2,r3,r4....r_n</code> x/y in pixels, r in pixels</li><li>replyformat 4: <code> x1,x2,x3,x4....x_n<br> y1,y2,y3,y4....y_n<br> r1,r2,r3,r4....r_n</code> x/y in xrange / yrange coordinate system, r in pixels</li><li>replyformat 5: <code> Ax1,Ax2,Ax3,Ax4....Ax_n<br> Ay1,Ay2,Ay3,Ay4....Ay_n<br> Bx1,Bx2,Bx3,Bx4....Bx_n<br> By1,By2,By3,By4....By_n<br> Cx1,Cx2,Cx3,Cx4....Cx_n<br>  Cy1,Cy2,Cy3,Cy4....Cy_n<br>  ....<br>  Zx1,Zx2,Zx3,Zx4....Zx_n<br> Zy1,Zy2,Zy3,Zy4....Zy_n</code> x/y in pixels</li><li>replyformat 6: <code> Ax1,Ax2,Ax3,Ax4....Ax_n<br> Ay1,Ay2,Ay3,Ay4....Ay_n<br> Bx1,Bx2,Bx3,Bx4....Bx_n<br> By1,By2,By3,By4....By_n<br> Cx1,Cx2,Cx3,Cx4....Cx_n<br> Cy1,Cy2,Cy3,Cy4....Cy_n<br> ....<br> Zx1,Zx2,Zx3,Zx4....Zx_n<br> Zy1,Zy2,Zy3,Zy4....Zy_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 7: <code> x1:y1,x2:y2,x3:y3,x4:y4...x_n:y_n</code> x/y in pixels</li><li>replyformat 8: <code> x1:y1,x2:y2,x3:y3,x4:y4...x_n:y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 9: <code> x1:y1:r1,x2:y2:r2,x3:y3:r3,x4:y4:r3...x_n:y_n:r_n</code> x/y in pixels</li><li>replyformat 10: <code> x1:y1:r1,x2:y2:r2,x3:y3:r3,x4:y4:r3...x_n:y_n:r_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 11: <code> Ax1,Ay1,Ax2,Ay2<br>Bx1,By1,Bx2,By2<br> Cx1,Cy1,Cx2,Cy2<br> Dx1,Dy1,Dx2,Dy2<br> ......<br> Zx1,Zy1,Zx2,Zy2</code> x/y in xrange / yrange coordinate system</li><li>replyformat 12: <code> Ax1,Ay1,Ax2,Ay2<br> Bx1,By1,Bx2,By2<br>Cx1,Cy1,Cx2,Cy2<br> Dx1,Dy1,Dx2,Dy2<br> ......<br> Zx1,Zy1,Zx2,Zy2</code> x/y in pixels</li><li>replyformat 13: <code> Ax1:Ay1:Ax2:Ay2,Bx1:By1:Bx2:By2,Cx1:Cy1:Cx2:Cy2,Dx1:Dy1:Dx2:Dy2, ... ,Zx1:Zy1:Zx2:Zy2</code> x/y in xrange / yrange coordinate system</li><li>replyformat 14: <code> Ax1:Ay1:Ax2:Ay2,Bx1:By1:Bx2:By2....Zx1:Zy1:Zx2:Zy2</code> x/y in pixels</li><li>replyformat 15: reply from inputfields,textareas <code>reply1,reply2,reply3,...,reply_n</code></li><li>replyformat 16: mathml input fields</li><li>replyformat 17: read ''userdraw text,color`` only <code>x1,y1,text1 \\n x2,y2,text2...\\n...x_n,y_n,text_n </code> x/y-values are in xrange/yrange</li><li>replyformat 18: read_canvas() will read all interactive clocks in <code>H1:M1:S1,H2:M2:S2...Hn:Mn:Sn</code></li><li>replyformat 19: read_canvas() will return the object number of marked / clicked object (clock), analogue to (shape library) onclick command</li><li>replyformat 20: read_canvas() will reply "object_number:x:y" of external images: object_number of the first draggable external image in the fly-script starts with 0, e.g. expect something like 0:-5:4,1:6:2,2:-2:-5, the first image position is (-5:4), the second image position is (6:2) and the third image position is (-2:-5) 	<li>replyformat 21: <code> (x1:y1) (x2:y2) ... (x_n:y_n)</code> verbatim coordinate return</li><li>replyformat 22: returns an array .... <code>reply[0]=x1 reply[1]=y1 reply[2]=x2 reply[3]=y2 ... reply[n-1]=x_n reply[n]=y_n</code> x/y in xrange / yrange coordinate system</li><li>replyformat 23: can only be used for drawtype ''polyline``. A typical click sequence in drawtype polyline is x1,y1,x2,y2,x2,y2,x3,y3,x3,y3.....,x(n-1),y(n-1),x(n-1),y(n-1),xn,yn --replyformat 23 gives <code>x1,y1,x2,y2,x3,y3,.....x(n-1),y(n-1),xn,yn</code>; multiple occurences will be filtered out. The reply will be in x-y-range (xreply \\n yreply)</li><li>replyformat 24: read all inputfield values: even those set ''readonly``</li><li>replyformat 25: <code> angle1,angle2;...;angle_n</code> will return the radius (one or many) of the user drawn circle segment in degrees</li><li>replyformat 26: <code> rad1,rad2,...rad_n</code> will return the radius (one or many) of the user drawn circle segment in radians</li><li>replyformat 27: return (only) userdraw inputfields <code>x1,y1,text1<br> x2,y2,text2...<br>...x_n,y_n,textn</code></li><li>replyformat 28: <code> x1,y1,r1,x2,y2,r2...x_n,y_n,r_n</code> x / y / r in xrange / yrange coordinate system: may be used to reinput into command <code>circles color,x1,y1,r1,x2,y2,r2...x_n,y_n,r_n</code> will not return anything else (e.g. no inputfields, text etc)</li><li>replyformat 34: a special for OEF and dragging external images -included via commands <a href='#copy'>copy</a> or <a href='#copyresized'>copyresized</a> there will be an extra function <code>read_canvas_images()</code> for reading the coordinates of the images.<br>for now this is a unique function, e.g. there is no ''canvas id`` linked to it. (TO DO !!! 18/5/2019)</li></ul>
	@ special replyformat = 100 ; will access to the raw javascript object data...use: read_dragdrop([property,property,...])<br>for example  properies like 'clicked','text', 'angle' , 'x'
	*/
	 reply_format = (int) get_real(infile,1);
	 reply_precision = precision;
	break;

	case ROUNDRECT:
	/*
	@ roundrect x1,y1,x2,y2,radius in px,color
	@ use command <code>froundrect x1,y1,x2,y2,radius,color</code> for a filled rectangle
	@ use command/keyword <a href='#filled'>filled</a> before command <code>roundrect x1,y1,x2,y2,radius,color</code>
	@ fillcolor will be identical to ''color``
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%roundrect%size 400,400%xrange -10,10%yrange -10,10%roundrect 0,0,4,-4,20,green%roundrect 0,5,4,1,10,red
	*/
	    for(i=0;i<6;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1:double_data[1] = get_real(infile,0);break; /* y-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* x-values */
		    case 3:double_data[3] = get_real(infile,0);break; /* y-values */
		    case 4:int_data[0] = (int) (get_real(infile,0));break; /* radius value in pixels */
		    case 5:stroke_color = get_color(infile,1);/* name or hex color */
    	    		if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
    	    		if(use_affine == TRUE ){ transform(2,4);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			/* ensure no inverted roundrect is produced... */
			if( double_data[0] > double_data[2] ){double_data[4] = double_data[0];double_data[0] = double_data[2];double_data[2] = double_data[4];}
			if( double_data[3] > double_data[1] ){double_data[4] = double_data[1];double_data[1] = double_data[3];double_data[3] = double_data[4];}
    			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			/* object_cnt++;*/
			reset();
	            break;
		}
	    }
	    dragstuff[6] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case ROUNDRECTS:
	/*
	@ roundrects color,radius in px,x1,y1,x2,y2,x3,y3,x4,y4,....
	@ for filled roundrects use command/keyword <a href='#filled'>filled</a> before command
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%roundrects%size 400,400%xrange -10,10%yrange -10,10%roundrects blue,5,0,0,4,-4,5,4,1,2
	*/

	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    int_data[0] = (int) (get_real(infile,0)); /* radius value in pixels */
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		/* ensure no inverted roundrect is produced... */
		if( double_data[c] > double_data[c+2] ){double_data[c+4] = double_data[c];double_data[c] = double_data[c+2];double_data[c+2] = double_data[c+4];}
		if( double_data[c+3] > double_data[c+1] ){double_data[c+4] = double_data[c+1];double_data[c+1] = double_data[c+3];double_data[c+3] = double_data[c+4];}
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,6,[%.*f,%.*f],[%.*f,%.*f],[%d,%d],[%d,%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],int_data[0],int_data[0],int_data[0],int_data[0],line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}
		/* object_cnt++; */
	    }
	    dragstuff[6] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    reset();
	    break;

	case RULER:
	/*
	@ ruler x,y,x-width,y-height,mode
	@ x,y are the initial location
	@ x-width, y-height are the ruler dimensions width &amp; height in xy-coordinate system
	@ the ruler scale is by definition the x-scale, set by command ''xrange``. For example: a ruler x-width of 6 will have a scale ranging from 0 to 6
	@ mode: use -1 to set the ruler interactive (eg mouse movement of ruler; drag &amp; rotate)<br>use mode = '0&deg; - 360&deg;' to set the ruler with a static angle of some value
	@ if combined with a protractor, use replyformat = 32
	@ only one ruler allowed (for the time being)
	@ when using command ''zoom``, pay <b>attention</b> to the size and symmetry of your canvas to avoid a partial image, locate the start position near the center of the visual canvas; technical: the actual ''ruler`` is just a static generated image in a new canvas-memory. This image is only generated once, and a copy of its bitmap is translated & rotated onto the visible canvas. That is the reason for the ''high-speed dragging and rotating``. I have limited its size to xsize &times; ysize e.g. the same size as the visual canvas...
	@ usage: first left click on the ruler will activate dragging; a second left click will activate rotating (just move mouse around), a third click will freeze this position and the x/y-coordinate and angle in radians will be stored in reply(3), a next click will restart this sequence...
	@%ruler_interactive%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler -9,0,10,2,-1%display degree,blue,22
	@%ruler_set_degree_45%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler 0,0,10,2,45
	@%ruler_set_degree_125%size 800,400%xrange -10,10%yrange -10,10%strokecolor blue%opacity 200,50%filled%fillcolor lightgrey%ruler 0,0,10,2,125
	*/
	    for( i = 0;i < 5; i++ ){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* x-center */
		    case 1: double_data[1] = get_real(infile,0);break; /* y-center */
		    case 2: double_data[2] = get_real(infile,0);break; /* x-width */
		    case 3: double_data[3] = get_real(infile,0);break; /* y-width */
		    case 4: int_data[0] = (int)(get_real(infile,1)); /* passive mode */
		    decimals = find_number_of_digits(precision);
		    if( int_data[0] < 0 ){
		      js_function[JS_FIND_ANGLE] = 1;
		    }
	            add_js_ruler(double_data[0],double_data[1],double_data[2],double_data[3],font_family,stroke_color,stroke_opacity,fill_color,fill_opacity,line_width,int_data[0],use_snap);
	            string_length = 1 + snprintf(NULL,0,";ruler%d(); ",canvas_root_id);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,";ruler%d(); ",canvas_root_id);
		    add_to_buffer(tmp_buffer);
		    reply_precision = precision;
		    /* no reply from ruler if non-interactive */
		    if( reply_format == 0 && int_data[0] == -1 ){reply_format = 31;}
		    break;
		    default: break;
		}
	    }
	    break;

	case RESET:
	/*
	@ reset
	@ keyword
	@ disables the effects of the <a href="noreset">noreset</a> command
	@ so the next objects will not be <a href="#filled">filled</a> and <a href="#dashed">dashed</a>
	*/
	 no_reset = FALSE; reset();
	break;

	case RESETOFFSET:
	/*
	 @ resetoffset
	 @ keyword ; use to restore text placement on the canvas to the real (x;y) coordinates of the left bottom corner of the text
	 @ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-librariy
	*/
	 use_offset = 0;
	 break;

	case ROTATE:
	/*
	 @ rotate rotation_angle
	 @ angle in degrees
	 @ (only) the next object will be rotated is given angle
	 @ positive values rotate counter clockwise
	 @ attention: all objects will be rotated around their first point...<br><code>rotate 45<br>triangle 1,1,5,1,3,4,red</code><br>will rotate 45 degrees around point (1:1)
	 @ if another rotation center is needed, use command <a href="#rotationcenter">rotationcenter xc,yc</a>.<br>to reset this rotationcenter, use keyword <a href="#killrotate">killrotate</a>
	 @ attention: rotate will mess up the interactivity of the rotated object <br>e.g. if combined with command <a href="#drag">drag xy</a> or keyword <a href="#onclick">onclick</a>: the mouse recognises the original -unrotated- coordinates of the object
	 @%rotate_1%size 400,400%xrange -10,10%yrange -10,10%fpoly yellow,0,0,4,3,2,5%rotate 45%fpoly violet,0,0,4,3,2,5%killrotate%rotate 90%fpoly violet,0,0,4,3,2,5%
	*/
	    use_rotate = TRUE;
	    angle = -1*(get_real(infile,1));/* -1: to be compatible with Flydraw... */
	    break;
	case ROTATION_CENTER:
	/*
	@ rotationcenter x_center,y_center
	@ define an rotation center in your x/y-coordinate system
	@ wims will not check the validity of your input; use javascript console to debug any erors
	@ if not defined a rotation will be around the first point of an object
	@ to be used before command <a href="#rotate">rotate</a>
	@ use <a href="#killrotate">killrotate</a> to reset to 'null' <br/>(eg. the rotationcenter of the next object(s) will be the first (x;y) coordinate of the object(s))
	@ all other commands will use this rotation center, unless a <a href="#killrotation">killrotation</a> is given
	@%rotationcenter%size 400,400%xrange -5,10%yrange -5,10%circles green,3,3,4.25%rotationcenter 3,3%opacity 255,80%fpoly yellow,0,0,4,3,2,5%rotate 45%fpoly violet,0,0,4,3,2,5%rotate 90%fpoly lightblue,0,0,4,3,2,5%rotate 135%fpoly blue,0,0,4,3,2,5%rotate 180%fpoly orange,0,0,4,3,2,5%rotate 225%fpoly green,0,0,4,3,2,5%rotate 270%fpoly cyan,0,0,4,3,2,5%rotate 315%fpoly purple,0,0,4,3,2,5%linewidth 3%point 3,3,red%mouse red,22
	@%rotationcenter_slider%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%fillcolor black%strokecolor yellow%rotationcenter 0,0%fontsize 28%slider 0,2*pi,400,30,angle degrees active, rotate...%plot red,5*sin(x)%filled%linewidth 1%opacity 150,50%fillcolor orange%angle 0,0,pi,0,0,blue
	*/
	    for( i = 0;i < 2; i++ ){
		switch(i){
		    case 0: rotationcenter[0] = get_real(infile,0);break; /* x-center */
		    case 1: rotationcenter[1] = get_real(infile,1);break; /* y-center */
		}
		string_length = 1 + snprintf(NULL,0,"[%f,%f ]",rotationcenter[0],rotationcenter[1]);
		check_string_length(string_length);
		rotation_center = my_newmem(string_length);
		snprintf(rotation_center,string_length,"[%f,%f]",rotationcenter[0],rotationcenter[1]);
	    }
	    break;

	case SIZE:
	    /*
	    @ size width,height
	    @ set canvas size in pixels
	    @ mandatory first command (can only be preceded by keyword <a href="#popup">popup</a>)
	    @ if xrange and/or yrange is not given the range will be set to pixels:<br>xrange 0,xsize yrange 0,ysize<br>note: lower left corner is origin (0:0) !!! this in contrast to flydraw
	    */
	    found_size_command = 1;
	    /* using fabs: however "xsize == int": so "xsize = abs( (int) get_real(infile,0))" would be the idea... */
	    xsize = (int)(fabs(round(get_real(infile,0)))); /* just to be sure that sizes > 0 */
	    ysize = (int)(fabs(round(get_real(infile,1))));
	    /* sometimes we want xrange / yrange to be in pixels...without telling x/y-range */
	    xmin = 0;xmax = xsize;
	    ymin = 0;ymax = ysize;

/*
 The sequence in which stuff is finally printed is important !!
*/
fprintf(stdout,"\n\
<script>\n\
/*<![CDATA[*/\n\
if( typeof(wims_status) === 'undefined' ){ var wims_status = \"$status\";};\
if( typeof(use_dragdrop_reply) === 'undefined' ){ var use_dragdrop_reply = false;};\
if( typeof(canvas_scripts) === 'undefined' ){ var canvas_scripts = new Array();};\
canvas_scripts.push(\"%d\");\n/*]]>*/\n</script>\n\
",canvas_root_id);

/* style=\"display:block;position:relative;margin-left:auto;margin-right:auto;margin-bottom:4px;\" */
if( use_tooltip != 2){
 fprintf(stdout,"<!-- canvasdraw div -->\n\
 <div tabindex=\"0\" id=\"canvas_div%d\" style=\"max-width:%dpx;width:%dpx;height:%dpx\" class=\"canvas_wrapper\" oncontextmenu=\"return false;\">\
  <canvas class=\"canvas_placeholder\" width=\"%d\" height=\"%d\"></canvas>\
 </div>\n\
 <!-- tooltip and input placeholder -->\n\
 <div id=\"tooltip_placeholder_div%d\" style=\"text-align:center\">\
  <span id=\"tooltip_placeholder%d\" class=\"tooltip_placeholder\"></span></div>\
 <!-- include actual object code via include file -->\n\
 <script id=\"canvas_script%d\" src=\"%s\" defer></script>\n",canvas_root_id,xsize,xsize,ysize,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,getfile_cmd);
} else {
/*
set canvas_div invisible and do not include placeholder in main html page:
the js-include will also be in a popup window...to be shown when wims &#36;status = done
*/
 fprintf(stdout,"<!-- canvasdraw div invisible -->\n\
 <div tabindex=\"0\" id=\"canvas_div%d\" class=\"canvas_wrapper\" style=\"display:none;max-width:%dpx;width:%dpx;height:%dpx;\">\
  <canvas class=\"canvas_placeholder\" width=\"%d\" height=\"%d\"></canvas>\
 </div>\n\
 <div id=\"tooltip_placeholder_div%d\" style=\"display:none;position:relative;margin-left:auto;margin-right:auto;margin-bottom:4px;\">\
  <span id=\"tooltip_placeholder%d\" class=\"tooltip_placeholder\"></span></div>\
 <!-- include actual object code via include file -->\n\
 <script id=\"canvas_script%d\" src=\"%s\"></script>\n",canvas_root_id,xsize,xsize,ysize,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,getfile_cmd);
}

/* these must be global...it is all really very poor javascript:( */
fprintf(js_include_file,"\n/* begin generated javascript include for canvasdraw version %s */\n\
\"use strict\";\n\
/* these variables and functions must be global */\
var read_dragdrop%d;\
var read_canvas_images;\
var read_canvas%d;\
var set_clock;\
var clear_draw_area%d;\
var update_draw_area%d;\
var place_image_on_canvas;\
var draw_boxplot;\
var redraw_all%d;\
var userdraw_primitive;\
var wims_canvas_function%d = function(){\n/* common used stuff */\
var userdraw_x = [];var userdraw_y = [];var userdraw_radius = [];\
var xsize = %d;\
var ysize = %d;\
var precision = 100;\
var canvas_div = document.getElementById(\"canvas_div%d\");\
var create_canvas%d = function(canvas_type,size_x,size_y){var cnv;if(document.getElementById(\"wims_canvas%d\"+canvas_type)){ cnv = document.getElementById(\"wims_canvas%d\"+canvas_type);}else{try{ cnv = document.createElement(\"canvas\"); }catch(e){alert(\"Your browser does not support HTML5 CANVAS:GET FIREFOX !\");return;};canvas_div.appendChild(cnv);};cnv.width = size_x;cnv.height = size_y;cnv.style.top = 0;cnv.style.left = 0;cnv.style.position = \"absolute\";cnv.id = \"wims_canvas%d\"+canvas_type;return cnv;};\
function findPosX(i){ var obj = i;var curleft = 0;if(obj.offsetParent){while(1){curleft += obj.offsetLeft;if(!obj.offsetParent){break;};obj = obj.offsetParent;};}else{if(obj.x){curleft += obj.x;};};return curleft;};function findPosY(i){var obj = i;var curtop = 0;if(obj.offsetParent){while(1){curtop += obj.offsetTop;if(!obj.offsetParent){break;};obj = obj.offsetParent;};}else{if(obj.y){curtop += obj.y;};};return curtop;};\
function x2px(x){if(use_xlogscale == 0 ){return parseFloat((x)*xsize/(xmax - xmin) - xsize*xmin/(xmax - xmin));}else{var x_max = Math.log(xmax)/Math.log(xlogbase);var x_min = Math.log(xmin)/Math.log(xlogbase);var x_in = Math.log(x)/Math.log(xlogbase);return x_in*xsize/(x_max - x_min) - xsize*x_min/(x_max - x_min);};};\
function px2x(px){if(use_xlogscale == 0 ){return parseFloat(px*(xmax - xmin)/xsize + xmin);}else{var x_max = Math.log(xmax)/Math.log(xlogbase);var x_min = Math.log(xmin)/Math.log(xlogbase);var x_out = x_min +px*(x_max - x_min)/(xsize);return Math.pow(xlogbase,x_out);};};\
function px2y(py){if(use_ylogscale == 0 ){return parseFloat(ymax - py*(ymax - ymin)/ysize);}else{var y_max = Math.log(ymax)/Math.log(ylogbase);var y_min = Math.log(ymin)/Math.log(ylogbase);var y_out = y_max +py*(y_min - y_max)/(ysize);return Math.pow(ylogbase,y_out);};};\
function y2px(y){if(use_ylogscale == 0){return parseFloat(-1*(y)*ysize/(ymax - ymin) + ymax*ysize/(ymax - ymin));}else{var y_max = Math.log(ymax)/Math.log(ylogbase);var y_min = Math.log(ymin)/Math.log(ylogbase);var y_in = Math.log(y)/Math.log(ylogbase);return (y_max - y_in)*ysize/(y_max - y_min);};};\
function scale_x_radius(rx){return rx*xsize/(xmax - xmin);};\
function scale_y_radius(ry){return ry*ysize/(ymax - ymin);};\
function distance(x1,y1,x2,y2){return Math.sqrt( (x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) );};\
function distance_to_line (r,q,x,y){var c = (y) - (-1/r)*(x);var xs = r*(c - q)/(r*r+1);var ys = (r)*(xs)+(q);return parseInt(Math.sqrt( (xs-x)*(xs-x) + (ys-y)*(ys-y) ));};\
function move(obj,dx,dy){for(var p = 0 ; p < obj.x.length; p++){obj.x[p] = obj.x[p] + dx;obj.y[p] = obj.y[p] + dy;};return obj;};\
var snap_x = 1;var snap_y = 1;\
function snap_to_x(x){return x2px(snap_x*(Math.round((px2x(x))/snap_x)));};\
function snap_to_y(y){return y2px(snap_y*(Math.round((px2y(y))/snap_y)));};\
function multisnap_check(x,y,snap){switch(snap){case 1:return [snap_to_x(x),snap_to_y(y)];break;case 2:return [snap_to_x(x),y];break;case 3:return [x,snap_to_y(y)];break;case 4:return snap_to_points(x,y);break;case 5: return snap_to_fun(x,y);break;default: return [x,y];break;};};\
var xlogbase = 10;\
var ylogbase = 10;\
var use_xlogscale = 0;\
var use_ylogscale = 0;\
var x_strings = {};var x_strings_up = [];\
var y_strings = null;\
var use_jsmath = 0;\
var xstart = 0;\
var ystart = 0;\
var unit_x=\" \";\
var unit_y=\" \";\
var dragdrop_reply = [];\
var external_canvas = create_canvas%d(%d,xsize,ysize);",VERSION,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,xsize,ysize,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,canvas_root_id,EXTERNAL_IMAGE_CANVAS);
/* var xstart,ystart are normally 0 : in case of sgraph they have the 'jump' in the graph */
	    break;


	case SEGMENT:
	/*
	@ segment x1,y1,x2,y2,color
	@ alternative: seg
	@ draw a line segment between points (x1:y1)--(x2:y2) in color ''color``
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%segment_onclick%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%segment 1,1,-9,3,green
	@%segment_drag_y%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag y%segment 1,1,-9,3,green
	*/
	    for(i=0;i<5;i++) {
		switch(i){
		    case 0: double_data[0]= get_real(infile,0);break; /* x1-values */
		    case 1: double_data[1]= get_real(infile,0);break; /* y1-values */
		    case 2: double_data[2]= get_real(infile,0);break; /* x2-values */
		    case 3: double_data[3]= get_real(infile,0);break; /* y2-values */
		    case 4: stroke_color=get_color(infile,1);/* name or hex color */
			if(use_rotate == TRUE ){rotate(4,angle,rotationcenter,2);}
			if(use_affine == TRUE ){ transform(4,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			decimals = find_number_of_digits(precision);
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,double_data[1],decimals,double_data[3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			/* object_cnt++; */
			reset();
			break;
		    default: break;
		}
	    }
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case SEGMENTS:
	/*
	@ segments color,x1,y1,x2,y2,...,x_n,y_n
	@ alternative: segs
	@ draw multiple segments between points (x1:y1)--(x2:y2).....and... (x_n-1:y_n-1)--(x_n:y_n) in color ''color``
	@ use command ''linewidth int`` to adjust size
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	@%segments_onclick%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
	@%segments_drag_y%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag y%segments green,1,1,3,3,0,0,-3,3,1,1,4,-1,-5,5,-3,-1
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if(use_rotate == TRUE ){rotate(i-1,angle,rotationcenter,2);}
	    if(use_affine == TRUE ){ transform(i-1,2);}
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    decimals = find_number_of_digits(precision);
	    for(c = 0 ; c < i-1 ; c = c+4){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[30,30],[30,30],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+2],decimals,double_data[c+1],decimals,double_data[c+3],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    		add_to_buffer(tmp_buffer);
    		if(onclick != 0){object_cnt++;}
		/* object_cnt++;*/
	    }
	    reset();
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case SETLIMITS:
	/*
	    @ setlimits
	    @ keyword: if set, it will produce 4 inputfields for ''xmin,xmax,ymin,ymax`` and an ''ok`` button
	    @ may be used for inputfield based zooming / panning
	    @ may be styled using command <a href="#css">css</a>
	    @ use commands <a href="#xlabel">xlabel / ylabel</a> to change text from xmin to ''xlabel`` etc
	    @ note: the input value will not be checked on validity
	    @%setlimits%size 400,400%xrange -10,10%yrange -10,10%precision 1%xlabel T%ylabel H%axis%axisnumbering%grid 2,2,grey,2,2,5,grey%precision 100%multistrokecolors red,green,blue,orange%multilinewidth 1,1,2,2%multistrokeopacity 0.6,0.7,0.8,0.9%jsplot red,1/x,-1,x,1/(x-3),1/(x+3)%setlimits
	*/
	    js_function[JS_SAFE_EVAL] = 1;
	    js_function[JSPLOT_AND_ZOOM] = 1;
	    add_setlimits(font_size,css_class);
	    done = TRUE;
	    break;

	case SETPIXEL:
	/*
	@ setpixel x,y,color
	@ A rectangular "point" with diameter 1 pixel centered at (x:y) in xrange / yrange
	@ pixels can <b>not</b> be dragged or clicked
	@ "pixelsize = 1" may be changed by command <code>pixelsize int</code>
	@%setpixel%size 400,400%xrange -10,10%yrange -10,10%setpixel 1,1,red%pixelsize 2%setpixel 2,2,green%pixelsize 3%setpixel 3,3,blue%
	*/
	    js_function[DRAW_PIXELS] = 1;
	    for(i=0;i<3;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x */
		    case 1: double_data[1] = get_real(infile,0); break; /* y */
		    case 2: stroke_color = get_color(infile,1);
			   string_length = 1 + snprintf(NULL,0,"draw_setpixel([%f],[%f],\"%s\",%.2f,%d);\n",double_data[0],double_data[1],stroke_color,stroke_opacity,pixelsize);
			   check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			   snprintf(tmp_buffer,string_length,"draw_setpixel([%f],[%f],\"%s\",%.2f,%d);\n",double_data[0],double_data[1],stroke_color,stroke_opacity,pixelsize);
			   add_to_buffer(tmp_buffer);
			   break;
		    default:break;
		}
	    }
	    reset();
	break;
	case SLIDER:
	/*
	@ slider start_value,end_value,width px,height px,type,label
	@ type may be: ''x,y,angle``
	@ if a slider value display is desired, use for argument ''type``: ''x display``, ''y display``, ''angle radian``, ''angle degree``
	@ is the slider is used for animation, add keyword ''anim`` or ''animate`` to ''type``; for now only one animated slider may be used...
	@ default behaviour is: click on an object to use its slider(s)<br/>to use sliders without clicking on an object, use for ''type`` keyword ''active``<br>eg: <code>slider -2*pi,2*pi,300,30,angle degree active,Rotate</code>
	@ if a unit (or something like that...) for x/y-value display is needed, use commands ''xunit`` and / or ''yunit``
	@ if the translation should be performed using a function, use for type: ''x function``, ''y function``<br>use commands ''sliderfunction_x`` and/or ''sliderfunction_y`` before the slider command to define the functions. Example:<code>sliderfunction_x x^2<br>sliderfunction_y y^2<br>slider -5,5,100,100,xy function,Some_Text<br>...some stuff to slide<br>killslider<br>sliderfunction_x x^2-2<br>slider -15,15,100,10,x function,Some_Other_Text<br>...more stuff to slide<br>killslider... etc</code>
	@ use command ''slider`` before draggable/clickable objects.
	@ drag and drop may be combined with rotation slider<br>for example an arrow rotated by a slider may be placed anywhere (drag&drop)<br><code>size 300,300<br>xrange -5,5<br>yrange -5,5<br>grid 1,1,grey<br>linewidth 3<br>drag xy<br>fillcolor orange<br>strokecolor blue<br>slider 0,2*pi,250,30,angle degrees,Rotate arrow<br>arrow 2,2,5,5,8,red</code><br>note: except a combination 'drag' and 'slider' for command 'latex, katex, mathml, html, obabel'
	@ no slider for a math function, these can be traced using command ''trace_jscurve some_function_in_x``
	@ a slider will affect all draggable objects after the ''slider`` command...<br>and can be used to group translate / rotate several objects...<br>until a next ''slider`` or keyword ''killslider``
	@ amount of sliders is not limited.
	@ a slider can not be set ''snaptogrid`` or other ''snapto*`` : you may always use 'drag xy' in combination with the slider objects
	@ <code>javascript:read_dragdrop();</code> will return an array with ''object_number:slider_value``
	@ every draggable object may have its own slider (no limit in amount of sliders)
	@ label: some slider text. <br>Note: on <a target='new' href='https://katex.org'>KaTeX</a> enabled wims, TeX produced by wims command ''mathmlmath``, is allowed.
	@ use fillcolor for slider controlkey
	@ use strokecolor for slider bar
	@ use fontfamily / fontcolor to set used fonts
	@ use opacity (only fill opacity will be used) to set transparency
	@ the slider canvas will be added to the ''tooltip div``: so incompatible with command tooltip ; setlimits etc
	@%slider_x_y_angle%%size 300,300%xrange -5,5%yrange -5,5%grid 1,1,grey%linewidth 3%fillcolor orange%strokecolor blue%slider 0,2*pi,300,30,angle active degrees,Rotate arrow%arrow 0,0,4.5,0,8,red%killslider%opacity 200,100%slider -2,2,300,30,x active,move blue rectangle%frect -4,4,1,-1,blue%killslider%linewidth 2%slider -2,2,300,30,y,move green rectangle%frect -4,4,1,-1,green
	@%slider_click%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 2%slider 0,2*pi,300,28,angle degree, name%fillcolor lightgreen%#CLICK ON THE OBJECTS TO ACTIVATE%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
	@%slider_active%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle degree active, name%fillcolor lightgreen%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
	@%slider_animate%%size 300,300%xrange -6,6%yrange -6,6%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle anim active, name%fillcolor lightgreen%opacity 255,30%ftriangle 2,2,-2,2,0,0,red%ftriangle -2,2,-2,-2,0,0,blue%ftriangle -2,-2,2,-2,0,0,green%ftriangle 2,-2,2,2,0,0,orange%rotationcenter 0,0%frect -2,2,2,-2,black
	@%slider_html_image%%size 400,400%xrange -6,6%yrange -6,6%bgcolor white%grid 1,1,grey%linewidth 1%slider 0,2*pi,300,28,angle active degree,%centered%html 0,0,<img src="gifs/domains/sciences/flasks.svg" width="100px" height="100px">
	*/
	    js_function[INTERACTIVE] = 1;
	    int_data[2] = 0; /* --> show_display = 0; */
	    for(i=0; i<6 ; i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* start value */
		    case 1: double_data[1] = get_real(infile,0);break; /* end value */
		    case 2: int_data[0] = (int)(get_real(infile,0));break; /* width */
		    case 3: int_data[1] = (int)(get_real(infile,0));break; /* height */
		    case 4: temp = get_string_argument(infile,0); /* type: x,y,angle */
			    if( strstr(temp,"displ")!=0 ||  strstr(temp,"deg")!=0 ||  strstr(temp,"rad")!=0 ){int_data[5] = 1; }else{int_data[5] = 0;}
		    	    if(strstr(temp,"anim")!= 0){int_data[3] = 1;}else{int_data[3] = 0;}
		    	    if(strstr(temp,"active")!= 0){onclick = 4;}else{onclick=0;}
		    	    if(strstr(temp,"angle")!= 0){slider_type="R";if( strstr(temp,"rad")!= 0){int_data[2] = 3;}if( strstr(temp,"deg")!= 0){int_data[2] = 4;}}
		    	    else
		    	    if(strstr(temp,"xy") != 0){slider_type = "XY";if( strstr(temp,"disp")!= 0){int_data[2] = 5;}}
		    	    else
		    	    if(strstr(temp,"x") != 0){slider_type = "X";if( strstr(temp,"disp")!= 0){int_data[2] = 1;}}
		    	    else
		    	    if(strstr(temp,"y") != 0){slider_type = "Y";if( strstr(temp,"disp")!= 0){int_data[2] = 2;}}
		    	    else
		    	    canvas_error("slider can be of type: x,y,angle,fun_x:fun_y");
		    	    break;
		    case 5: temp = get_string_argument(infile,1); if( strstr(temp,"\"") != 0 ){ temp = str_replace(temp,"\""," ");}
		    /* slider label : in case of latex/mathmlmath we need to remove the extra " */
		    break;
		}
	     }

	    if(use_slider == -1 ){ /* add once */
	     add_slider(int_data[3]);
	     if(int_data[5] == 1 ){add_slider_display(precision,font_size,font_color,stroke_opacity);}
	    }
	    use_slider++;
	    if(int_data[3] == 0){\
	     string_length = 1 + snprintf(NULL,0,"slider%d = new slider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]);
	     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	     snprintf(tmp_buffer,string_length  ,"slider%d = new slider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]);
	    }else{
	     string_length = 1 + snprintf(NULL,0,"slider%d = new animslider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]);
	     add_slider(int_data[3]);/* use only once !! */
	     check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	     snprintf(tmp_buffer,string_length  ,"slider%d = new animslider(\"%s\",\"%s\",%d,%d,%d,%d,\"%s\",\"%s\",[%f,%f],%f,%f,'%s',%d);\n",use_slider,slider_type,temp,use_slider,int_data[0],int_data[1],line_width,fill_color,stroke_color,fill_opacity,stroke_opacity,double_data[0],double_data[1],font_family,int_data[2]);
	    }
	    add_to_buffer(tmp_buffer);
	    fprintf(js_include_file,"var slider%d;",use_slider);
	    use_dragstuff = 2;
//	    dragstuff[22] = 1; /* dragstuff switch no 22 is a slider...*/
	    if(onclick != 4 ){ js_function[INTERACTIVE] = 1; }/* no need to click on object to use slider... */
	    //js_function[JS_ROTATE_MOUSE] = 1;
	    c = 0;
	    for(i=last_slider;i<=use_slider;i++){
	     int_data[c] = i; c++;
	    }
	    my_sliders = data2js_array(int_data,use_slider - last_slider+1);
	break;

	case SGRAPH:
	/*
	 @ sgraph xstart,ystart,xmajor,ymajor,xminor,yminor,majorgrid_color,minorgrid_color
	 @ primitive implementation of a ''broken scale`` graph...
	 @ not very versatile: only usable in combination with userdraw <br>eg no other objects will obey this "coordinate system"<br>if you want to place an object into this coordinate system, be aware that 10% or 20% of xsize and/or ysize is ''lost``.<br>Use these "formulas" to recalculate the virtual coordinates:<br>factor=0.8 in case xstart != xmin (or ystart != ymin)<br>factor=0.9 in case xstart = xmin (or ystart = ymin)<br>px_x_point = ((factor*xsize)/(xmax - xstart))*(x_point - xmax)+xsize<br>x_recalculated = px*(xmax - xmin)/xsize + $xmin<br>px_y_point = -1*factor*y_point*ysize/(ymax - ystart) + ymax*factor*ysize/(ymax - ystart)<br>y_recalculated = ymax - py*(ymax - ymin)/ysize<br>
	 @%sgraph%size 400,400%xrange 0,10000%yrange 0,100%sgraph 9000,50,100,10,4,4,grey,blue%userinput_xy%linewidth 2%userdraw segments,red%precision 0%mouse blue,22
	*/
	    js_function[DRAW_SGRAPH] = 1;
	    for(i = 0 ; i < 8 ;i++){
	        switch(i){
	    	    case 0:double_data[0] = get_real(infile,0);break;
	    	    case 1:double_data[1] = get_real(infile,0);break;
	    	    case 2:double_data[2] = get_real(infile,0);break;
	    	    case 3:double_data[3] = get_real(infile,0);break;
	    	    case 4:int_data[0] = (int)(get_real(infile,0));break;
	    	    case 5:int_data[1] = (int)(get_real(infile,0));break;
	    	    case 6:stroke_color = get_color(infile,0);break;
	    	    case 7:font_color = get_color(infile,1);
	    	    string_length = 1 + snprintf(NULL,0,"xstart = %f;\nystart = %f;\ndraw_sgraph(%d,%d,%f,%f,%d,%d,\"%s\",\"%s\",\"%s\",%f,%d);\n",double_data[0],double_data[1],GRID_CANVAS,precision,double_data[2],double_data[3],int_data[0],int_data[1],stroke_color,font_color,font_family,stroke_opacity,font_size);
	    	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    	    snprintf(tmp_buffer,string_length,"xstart = %f;\nystart = %f;\ndraw_sgraph(%d,%d,%f,%f,%d,%d,\"%s\",\"%s\",\"%s\",%f,%d);\n",double_data[0],double_data[1],GRID_CANVAS,precision,double_data[2],double_data[3],int_data[0],int_data[1],stroke_color,font_color,font_family,stroke_opacity,font_size);
	    	    add_to_buffer(tmp_buffer);
	    	    break;
	    	    default:break;
	        }
	    }
	    /* sgraph(canvas_type,precision,xmajor,ymajor,xminor,yminor,majorcolor,minorcolor,fontfamily,opacity)*/
	    break;
	case SNAPTOFUNCTION:
	/*
	@ snaptofunction some_function_in_x,some_funtion_in_y
	@ alternative: snaptofun
	@ the next object will snap to the calculated values
	@ note: snaptofun is probably not really useful feature...
	@ if you want only modification of y-values,just use: <code>snaptofunction x,5*sin(1/y)</code>
	@ if you want only modification of x-values,just use: <code>snaptofunction 5*sin(1/x),y</code>
	@ for now only one instance of ''snaptofunction`` is allowed
	@ use rawmath on your functions: no validity checking is done by wims !
	@ note: switching x and y coordinates? <code>snaptofunction y,x</code>
	@%snaptofunction_1%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%snaptofunction x,5*sin(x)%linewidth 3%crosshairsize 6%userdraw crosshairs,red%linewidth 2%curve blue,5*sin(x)%xunit = x-value%display x,blue,22
	@%snaptofunction_2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 100%snaptofunction y^2-9,y%#snaptofunction y^2-9,abs(y)%linewidth 3%crosshairsize 6%userdraw crosshairs,red%linewidth 2%curve blue,sqrt(x+9)%curve blue,-1*sqrt(x+9)%yunit = y-value%display y,blue,22
	*/
	temp = get_string_argument(infile,0);
	use_snap = 2;
	    use_snap = 5;
	js_function[JS_MATH] = 1;
	fprintf(js_include_file,"var snap_fun = {x:to_js_math('%s'),y:to_js_math('%s')};function snap_to_fun(px,py){ var x = px2x(px); var y = px2y(py); return [ x2px(eval(snap_fun.x)) , y2px(eval(snap_fun.y)) ];};",temp,get_string(infile,1));
	break;
	case SNAPTOPOINTS:
	/*
	@ snaptopoints x1,y1,x2,y2,x3,y3....
	@ a userdraw object will snap to these points.
	@ the array size (e.g. the number of points) of command ''snaptopoints`` is limited by constant MAX_INT (canvasdraw.h)<br/>this command may be repeated multiple times (no limit) to add points
	@ a draggable object (use command ''drag x|y|xy``) will snap to the closed of these points when dragged (mouseup)
	@ other options: use keyword ''snaptogrid``, ''xsnaptogrid`` or ''ysnaptogrid``
	@%snaptopoints%size 400,400%xrange -5,5%yrange -5,5%snaptopoints -1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%linewidth 2%points red,-1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%userdraw arrows,red
	@%snaptopoints%size 400,400%xrange -5,5%yrange -5,5%snaptopoints -1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%linewidth 3%%points blue,-1,-3,-1,-2,-1,0,-1,1,-1,2,-1,3,1,-3,1,-2,1,-1,1,0,1,1,1,2,1,3%drag xy%ftriangle -4,0,-2,3,0,0,red
	*/
	    i = 0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    decimals = find_number_of_digits(precision);
	    /* NEED AN EXTRA COUNTER VARIABLE FOR MORE THAN 2 CALLS */
	    fprintf(js_include_file,"if( temp_push_array === 'undefined' ){var temp_push_array;};if( points_to_snap_on === 'undefined' ){var points_to_snap_on;};var temp_push_array = [%s];\n",double_xy2js_array(double_data,i,decimals));
	    if( snap_to_points_cnt == 0 ){
		fprintf(js_include_file,"points_to_snap_on = temp_push_array;function find_min_diff(x,y,X,Y){var diff = 100000000;var chk;var idx = 0;var p = 0;while(X[p] != null){chk = distance(x,y,X[p],Y[p]);if( chk  < diff ){ diff = chk; idx = p;};p++;};return idx;};function snap_to_points(x,y){x = px2x(x); y = px2y(y);var xpoints = points_to_snap_on[0];var ypoints = points_to_snap_on[1];var idx = find_min_diff(x,y,xpoints,ypoints);x = xpoints[idx];y = ypoints[idx];return [x2px(x),y2px(y)];};");
	    }else{
		fprintf(js_include_file,"points_to_snap_on[0].push.apply(points_to_snap_on[0],temp_push_array[0]);points_to_snap_on[1].push.apply(points_to_snap_on[1],temp_push_array[1]);");
	    }
	    snap_to_points_cnt = 1; /* do not repeat including the js-functions...just once*/
	    use_snap = 4;
	break;

	case SNAPTOGRID:
	/*
	 @ snaptogrid
	 @ keyword (no arguments required)
	 @ a draggable object (use command ''drag x|y|xy``) will snap to the given grid when dragged (mouseup)
	 @ in case of userdraw the drawn points will snap to xmajor / ymajor grid
	 @ if no grid is defined, points will snap to every integer xrange/yrange value. (eg snap_x=1,snap_y=1)
	 @ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
	 @ if xminor / yminor is defined,(use keyword ''axis`` to activate the minor steps) the drawing will snap to xminor and yminor<br>use only even dividers in x/y-minor...for example <code>snaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code> will snap on x=0, x=0.5, x=1, x=1.5 .... will snap on y=0, y=0.25 y=0.5 y=0.75 ...
	 @%snaptogrid_1%size 400,400%xrange -5,5%yrange -5,5%axis%axisnumbering%precision 1%grid 1,1,grey,2,2,6,grey%linewidth 2%snaptogrid%userdraw crosshairs,blue%mouse red,22
	 @%snaptogrid_2%size 400,400%xrange -5,5%yrange -5,5%axis%axisnumbering%precision 1%grid 1,1,grey,4,1,6,grey%linewidth 1%snaptogrid%userdraw crosshairs,blue%mouse red,22
	*/
	use_snap = 1;
	break;

	case SQUARE:
	/*
	@ square x,y,side (px),color
	@ draw a square with left top corner (x:y) with side ''side`` in color 'color'
	@ use command <code>fsquare x,y,side,color</code> for a filled square
	@ use command/keyword <a href='#filled'>filled</a> before command <code>square x,y,side,color</code>
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%square%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%filled%fillcolor blue%square 0,0,120,green
	*/
	    for(i=0;i<4;i++){
		switch(i){
		    case 0:double_data[0] = get_real(infile,0);break; /* x1-values */
		    case 1:double_data[1] = get_real(infile,0);break; /* y1-values */
		    case 2:double_data[2] = get_real(infile,0);break; /* width in px */
		    case 3:stroke_color = get_color(infile,1);/* name or hex color */
			   decimals = find_number_of_digits(precision);
			   double_data[3] = double_data[0] + (xmax - xmin)*double_data[2]/xsize;
			   double_data[4] = double_data[1] + -1*(ymax - ymin)*double_data[2]/ysize;
			   if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			   string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,1,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[3],decimals,double_data[3],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[4],decimals,double_data[4],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			   check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			   snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,1,[%.*f,%.*f,%.*f,%.*f],[%.*f,%.*f,%.*f,%.*f],[%d],[%d],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[3],decimals,double_data[3],decimals,double_data[0],decimals,double_data[1],decimals,double_data[1],decimals,double_data[4],decimals,double_data[4],line_width,line_width,line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
			   add_to_buffer(tmp_buffer);
			   if(onclick != 0){object_cnt++;}/* object_cnt++; */
			   reset();break;
		    default: break;
		}
	    }
	    dragstuff[1] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case STATUS:
	/*
	@ status
	@ keyword
	@ alernative: nostatus
	@ used to override the effects of ''status=done`` in wims (answer.phtml)
	@ affects ''readonly`` in inputfields / textareas in canvasimage and all userdraw based commands
	@ e.g.: if keyword ''status`` is set, the pupil will be able to modify the canvas when the ''wims &#36;status variable`` is set to ''done``
	*/

	    fprintf(js_include_file,"\nwims_status=\"waiting\";\n");
	    break;

	case STRING:
	/*
	 @ string color,x,y,the text string
	 @ may be set ''onclick`` or ''drag xy``
	 @ note: when set ''onclick``, use an extra command ''fontsize`` (default: fontsize=12) to adjust the size of the clicked text-string<br>note: a clicked text string will be hardcoded : fontsize+10 in the font family courier
	 @ unicode supported: <code>string red,0,0,\\u2232</code><br/> See <a target='new' href='https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode'>https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode</a><br/> See <a  target='new' href='https://en.wikipedia.org/wiki/Greek_script_in_Unicode'>https://en.wikipedia.org/wiki/Greek_script_in_Unicode</a>
	 @ use a command like <code>fontfamily italic 24px Arial</code> to set fonts on browser that support font change
	 @ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>The font family for the sub/sup string will be Helvetica e.g. your font family settings will be ignored <br>to force end the subscript/supscript, use an extra space...see example:
	 @%string_sup_sub%size 400,400%xrange -6,6%yrange -6,6%fontfamily 22px Arial%# you can use a single space for separation in formula...%# use double space to create new word%string blue,-5,3,H_3O^+ + OH^-  \\u2192 2H_2O%# you can use a single space for separation in formula...%string red,-5,-3,H_3 O^+ + OH^\\u2212  \\u2192 2H_2 O%
	 @%string%size 400,400%xrange -10,10%yrange -10,10%fontfamily 14px Arial%crosshair -3,-3,red%crosshair 3,3,blue%string red,-3,-3,Hello World%fontfamily Italic 18px Arial%string red,3,3,Hello World%fontfamily 22pt STIX%string black,-10,8,\\u03B1 \\u03B2 \\u03B3 \\u03B4 \\u03B5 \\u03B6 \\u03B7 \\u03B8 \\u03B9 \\u03BA \\u03BB \\u03BC \\u03BD \\u03BE \\u03BF
	*/
	    if( use_rotate == TRUE  ){js_function[JS_ROTATE_MOUSE] = 1; }
	    dragstuff[14] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		    case 1: double_data[0] = get_real(infile,0);break; /* x in xrange*/
		    case 2: double_data[1] = get_real(infile,0);break; /* y in yrange*/
		    case 3: decimals = find_number_of_digits(precision);
		    if(use_affine == TRUE ){ transform(2,2);}
		    /* rotate is done by HTML5/CANVAS context rotation */
			temp = get_string_argument(infile,1);
			if(strstr(temp,"_") != NULL || strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
			decimals = find_number_of_digits(precision);
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			//onclick = 0;
			//use_offset = 0;
			reset();
			break;
		    default:break;
		}
	    }
	    break;

	case STRINGUP:
	/*
	 @ stringup color,x,y,rotation_degrees,the text string
	 @ may be set ''onclick`` or ''drag xy``
	 @ note: when set ''onclick``, use an extra command ''fontsize`` (default: fontsize=12) to adjust the size of the clicked text-string<br>note: a clicked text string will be hardcoded : fontsize+10 in the font family courier
	 @ unicode supported: <code>stringup red,0,0,45,\\u2232</code>
	 @ use a command like <code>fontfamily bold 34px Courier</code> to set fonts on browser that support font change
	 @ you could use keyword <a href='#yoffset'>yoffset</a> to -sometimes- do a small correction of text placement under/above a point (e.g. text &amp; point have thesame coordinates)
	 @ note: no need to ''killrotate`` after ''stringup``<br><code>onclick<br>rotate 45<br>string red,0,0,AAAAAA<br/>killrotate<br>string red,4,4,BBBBBB</code><br>is identical with:<br><code>onclick<br>stringup red,0,0,45,AAAAAA<br>string red,4,4,BBBBBB</code>
	 @ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>to end the subscript/supscript, use an extra space...see example:
	 @%stringup_sub_sup%size 400,400%xrange -6,6%yrange -6,6%fontfamily 22px Arial%# use single space for separation in formula...%# use double space to create new word%stringup red,-5,0,45,H_3 O^+ + OH^\\u2212  \\u2192 2H_2 O%
	 @%stringup%size 400,400%xrange -10,10%yrange -10,10%fontsize 24%fontfamily 14px Arial%crosshair -3,0,red%crosshair 3,0,blue%onclick%stringup red,-3,0,-90,Hello World%drag xy%stringup red,-3,0,-45,Hello World%stringup red,-3,0,45,Hello World%stringup red,-3,0,90,Hello World%stringup blue,3,0,-90,Hello World%stringup blue,3,0,-45,Hello World%stringup blue,3,0,45,Hello World%stringup blue,3,0,90,Hello World

	*/
	    /* html5 canvas rotation is only used for text objects  */
	    use_rotate = TRUE ;
	    dragstuff[14] = 1;
	    js_function[JS_ROTATE_MOUSE] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }

	    for(i=0;i<6;i++){
		switch(i){
		    case 0: stroke_color = get_color(infile,0);break;/* name or hex color */
		    case 1: double_data[0] = get_real(infile,0);break; /* x */
		    case 2: double_data[1] = get_real(infile,0);break; /* y */
		    case 3: angle = get_real(infile,0);break;/* rotation */
		    case 4: decimals = find_number_of_digits(precision);
			temp = get_string_argument(infile,1);
			if(strstr(temp,"_") != NULL || strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
			decimals = find_number_of_digits(precision);
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,font_size,font_family,my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			//onclick = 0;
			//use_offset = 0;
			reset();
			break;
		    default:break;
		}
	    }
	    use_rotate = FALSE;
	    break;

	case STYLE:
	/*
	 @ highlight color,opacity,linewidth
	 @ NOT IMPLEMENTED
	 @ use command ''onclick``: when the object receives a userclick it will increase its linewidth
	*/
	    break;


	case STROKECOLOR:
	/*
	@ strokecolor colorname or #hex
	@ to be used for commands that do not supply a color argument (like command ''linegraph``)
	*/
	    stroke_color = get_color(infile,1);
	    break;

	case FLY_TEXT:
	/*
	@ text fontcolor,x,y,font,text_string
	@ font may be described by keywords: giant,huge,normal,small,tiny
	@ use command ''fontsize`` to increase base fontsize for these keywords
	@ may be set ''onclick`` or ''drag xy``
	@ backwards compatible with flydraw
	@ unicode supported: text red,0,0,huge,\\u2232
	@ special: use '_' and '^' to imitate html sup/sub, like H_3O^+ + OH^\\u22i2  \\u2192 2H_2 O
	@ much better to use command <a href='#string'>string</a> combined with <a href='#fontfamily'>fontfamily</a> for a more fine grained control over html5 canvas text element
	@ super / sub script is supported, using '<b>_</b>' and '<b>^</b>' <br>to end the subscript/supscript, use an extra space...see <a href='#string'>string </a> command
	@ Avoid mixing old flydraw commands ''text``, ''textup`` with new canvasdraw commands ''string``, ''stringup``. If the fontfamily was set completely like <code>fontfamily italic 24px Arial</code>. In that case reset ''fontfamily`` to something lke ''fontfamily Arial`` before the old flydraw commands.
	@%text%size 400,400%xrange -10,10%yrange -10,10%fontsize 14%onclick%drag xy%text green,-4,-4,small,Hello World%drag xy%text red,-4,-2,large,Hello World%drag xy%text blue,-4,0,huge,Hello World%drag xy%text green,-4,3,giant,Hello World%drag xy
	*/
	    for(i = 0; i < 5 ;i++){
		switch(i){
		    case 0: stroke_color = get_color(infile,0);break;/* font_color == stroke_color name or hex color */
		    case 1: double_data[0] = get_real(infile,0);break; /* x */
		    case 2: double_data[1] = get_real(infile,0);break; /* y */
		    case 3: fly_font = get_string_argument(infile,0);
			    if(strcmp(fly_font,"giant") == 0){
				fly_font_size = (int)(font_size + 24);
			    }
			    else
			    {
				if(strcmp(fly_font,"huge") == 0){
				    fly_font_size = (int)(font_size + 14);
				}
				else
				{
				    if(strcmp(fly_font,"large") == 0){
					fly_font_size = (int)(font_size + 6);
					}
					else
					{
					    if(strcmp(fly_font,"small") == 0){
						fly_font_size = (int)(font_size - 4);
						if(fly_font_size<0){fly_font_size = 8;}
					}
				    }
				}
			    }
			    break;
		    case 4:
			temp = get_string_argument(infile,1);
			if(strstr(temp,"_") != NULL || strstr(temp,"^") != NULL){js_function[DRAW_SUBSUP] = 1;}
			decimals = find_number_of_digits(precision);
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			if(use_affine == TRUE ){ transform(2,2);}
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,%s,%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,fly_font_size,"null",my_sliders,rotation_center,use_offset);
			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,14,[%.*f],[%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%f,\"%s\",%d,%s,%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,0,0,0,0,use_rotate,angle,temp,fly_font_size,"null",my_sliders,rotation_center,use_offset);
			add_to_buffer(tmp_buffer);
			if(onclick != 0){object_cnt++;}
			reset();
			break;
		    default:break;
		}
	    }
	    dragstuff[14] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case TEXTAREA:
	/*
	 @ textarea x,y,cols,rows,readonly,value
	 @ may be further controlled by <a href="#css">css</a>
	 @ if ''&#36;status=done`` (e.g. in answer.phtml) the inputfield will be cleared and set readonly. Override this by keyword <a href="#status">status</a>.
	 @ if mathml inputfields are present and / or some userdraw is performed, these data will <b>not</b> be send as well (<code>javascript:read_canvas();</code>)
	 @ keyword ''xoffset | centered`` is not active for command ''textarea``
	 @%textarea%size 400,400%xrange -10,10%yrange -10,10%css color:red;background-color:lightblue;font-size:14px;text-align:center%textarea -3,-2,6,3,1,?%css color:blue;background-color:yellow;font-size:14px;text-align:center%textarea 0,-2,8,2,1,?
	*/
	    js_function[DRAW_TEXTAREAS] = 1;
	    for(i = 0 ; i<6;i++){
		switch(i){
		    case 0: int_data[0]=x2px(get_real(infile,0));break; /* x in px */
		    case 1: int_data[1]=y2px(get_real(infile,0));break; /* y in px */
		    case 2: int_data[2]=abs( (int)(get_real(infile,0)));break;/* cols */
		    case 3: int_data[3]=abs( (int)(get_real(infile,0)));break;/* rows */
		    case 4: if( get_real(infile,1) >0){int_data[4] = 1;}else{int_data[3] = 0;};break; /* readonly */
		    case 5: temp = get_string_argument(infile,1);
			    string_length = 1 + snprintf(NULL,0,  "draw_textareas(%d,%d,%d,%d,%d,%d,%d,\"%s\",\"%s\");\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],css_class,temp);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_textareas(%d,%d,%d,%d,%d,%d,%d,\"%s\",\"%s\");\n",canvas_root_id,input_cnt,int_data[0],int_data[1],int_data[2],int_data[3],int_data[4],css_class,temp);
			    add_to_buffer(tmp_buffer);
			    input_cnt++;break;
		    default: break;
		}
	    }
	    if(reply_format == 0 ){reply_format = 15;}
	    reset();
	    break;

	case TEXTFILL:
	/*
	@ textfill x0,y0,color,some_text
	@ x0,y0 in xrange / yrange
	@ color will be used for the font color
	@ use command <a href="#fontfamily">fontfamily</a> to set font type and size
	@ there is also a command <a href="#userdraw">userdraw textfill,color,some_text</a>
	@%textfill%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%fontfamily 24pt Arial%circles red,0,0,3,3,3,6%textfill 4,4,blue,HELLO WORLD
	*/

	    js_function[DRAW_TEXTFILL] = 1;
	    if(js_function[DRAW_FILLTOBORDER] != 1 ){/* use only once */
	     js_function[DRAW_FILLTOBORDER] = 1;
	     add_js_filltoborder(canvas_type);
	    }
	    decimals = find_number_of_digits(precision);
	    for(i=0;i<4;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0); break; /* x in px */
		    case 1: double_data[1] = get_real(infile,0); break; /* y in py */
		    case 2: font_color = get_color(infile,0); break;
		    case 3: temp = get_string(infile,1);
		    string_length = 1 + snprintf(NULL,0,"draw_textfill(%d,%*.f,%*.f,'%s','%s',%d,%d,'%s',false); ",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],font_color,font_family,xsize,ysize,temp);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_textfill(%d,%*.f,%*.f,'%s','%s',%d,%d,'%s',false); ",FILL_CANVAS+fill_cnt,decimals,double_data[0],decimals,double_data[1],font_color,font_family,xsize,ysize,temp);
		    add_to_buffer(tmp_buffer);
		    fill_cnt++;
		    break;
		    default:break;
		}
	    }
	    reset();
	break;


	case FLY_TEXTUP:
	/*
	 @ textup fontcolor,x,y,font,text_string
	 @ can <b>not</b> be set ''onclick`` or ''drag xy`` (because of translaton matrix...mouse incompatible)
	 @ font may be described by keywords: giant,huge,normal,small,tiny
	 @ use command ''fontsize`` to increase base fontsize for the keywords
	 @ backwards compatible with flydraw
	 @ unicode supported: textup red,0,0,huge,\\u2232
	 @ use command ''stringup`` and ''fontfamily`` for a more fine grained control over html5 canvas text element
	 @ Avoid mixing old flydraw commands ''text``, ''textup`` with new canvasdraw commands ''string``; ''stringup``. If the fontfamily was set completely like <code>fontfamily italic 24px Arial</code>. In that case reset ''fontfamily`` to something like ''fontfamily Arial`` before the old flydraw commands.
	*/
	    js_function[DRAW_TEXTS] = 1;
	    for(i = 0; i<5 ;i++){
		switch(i){
		    case 0: font_color = get_color(infile,0);break;/* name or hex color */
		    case 1: int_data[0] = x2px(get_real(infile,0));break; /* x */
		    case 2: int_data[1] = y2px(get_real(infile,0));break; /* y */
		    case 3: fly_font = get_string_argument(infile,0);
			    if(strcmp(fly_font,"giant") == 0){
				fly_font_size = (int)(font_size + 24);
			    }
			    else
			    {
				if(strcmp(fly_font,"huge") == 0){
				    fly_font_size = (int)(font_size + 14);
				}
				else
				{
				    if(strcmp(fly_font,"large") == 0){
					fly_font_size = (int)(font_size + 6);
					}
					else
					{
					    if(strcmp(fly_font,"small") == 0){
						fly_font_size = (int)(font_size - 4);
						if(fly_font_size<0){fly_font_size = 8;}
					}
				    }
				}
			    }
			    break;
		    case 4:
		    decimals = find_number_of_digits(precision);
		    temp = get_string_argument(infile,1);
		    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
		    string_length = 1 + snprintf(NULL,0,"draw_text(%d,%d,%d,%d,\"%s\",\"%s\",%.2f,90,\"%s\",%d,%.2f,%d);\n",STATIC_CANVAS,int_data[0],int_data[1],fly_font_size,"null",font_color,stroke_opacity,temp,use_rotate,angle,use_offset);
		    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		    snprintf(tmp_buffer,string_length,"draw_text(%d,%d,%d,%d,\"%s\",\"%s\",%.2f,90,\"%s\",%d,%.2f,%d);\n",STATIC_CANVAS,int_data[0],int_data[1],fly_font_size,"null",font_color,stroke_opacity,temp,use_rotate,angle,use_offset);
		    add_to_buffer(tmp_buffer);
		    reset();
		    //use_offset = 0;
		    break;
		    default:break;
		}
	    }
	    break;


	case TRACE_JSCURVE:
	/*
	 @ trace_jscurve some_math_function
	 @ will use a crosshair to trace the jsmath curve
	 @ two inputfields will display the current x/y-values (numerical evaluation by javascript)
	 @ default labels ''x`` and ''y``; use commands ''xlabel some_x_axis_name`` and ''ylabel some_y_axis_name`` to customize the labels for the input fields
	 @ use commands fontsize and css to format the fonts for labels and inputfields.
	 @ use commands ''linewidth, strokecolor, crosshairsize`` to adjust the corsshair.
	 @ the client browser will convert your math function to javascript math.<br>use parenthesis and rawmath: use 2*x instead of 2x etc etc no check is done on the validity of your function and/or syntax (use error console to debug any errors...)
	 @ be aware that the formulas of the plotted function(s) can be found in the page javascript source
	 @%trace_jscurve%size 400,400%xrange -10,10%yrange -10,10%precision 0%axis%axisnumbering%grid 2,2,grey,2,2,5,gray%recision 100%css color:blue;%linewidth 4%crosshairsize 8%trace_jscurve 5*sin(0.1*x^2)%linewidth 1%jsplot red,5*sin(0.1*x^2)%#only one curve can be traced
	*/
	    js_function[INTERACTIVE] = 1;
	    js_function[DRAW_CROSSHAIRS] = 1;
	    js_function[DRAW_LINES] = 1;
	    js_function[JS_MATH] = 1;
	    add_trace_js_mouse(TRACE_CANVAS,stroke_color,get_string(infile,1),font_size,stroke_opacity,line_width,crosshair_size,css_class);
	    break;


	case TRANGE:
	/*
	@ trange tmin,tmax
	@ alternative: ranget
	@ default -2,2
	*/
	    use_parametric = TRUE;
	    for(i = 0 ; i<2; i++){
		switch(i){
		    case 0: tmin = get_real(infile,0);break;
		    case 1: tmax = get_real(infile,1);break;
		    default: break;
		}
	    }
	    if(tmin >= tmax ){canvas_error(" trange is not OK: tmin &lt; tmax!\n");}
	    break;
	case TRANSLATION:
	/*
	 @ translation tx,ty
	 @ alternative: translate
	 @ will translate the next objects tx in xrange and ty in yrange
	 @ use command ''killtranstation`` to end the command
	 @%translation%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%fillpattern grid%ftriangle -6,6,8,6,5,1,blue%translation 2,2%ftriangle -6,6,8,6,5,1,red
	*/
	    for(i = 0 ; i<2;i++){
		switch(i){
		    case 0: affine_matrix[4] = get_real(infile,0);break;
		    case 1: affine_matrix[5] = get_real(infile,1);
			use_affine = TRUE;
			/* the other values affine_matrix[0..3] remain untouched*/
			break;
		    default: break;
		}
	    }
	break;

	case TRIANGLE:
	/*
	 @ triangle x1,y1,x2,y2,x3,y3,color
	 @ use ftriangle or keyword <a href='#filled'>filled</a> for a solid triangle
	 @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	 @%triangle%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%opacity 250,150%drag xy%triangle 0,0,-4,4,6,8,red%drag xy%ftriangle 0,0,-4,-4,6,-8,red%fillpattern grid%drag xy%ftriangle -6,6,8,6,5,1,blue
	*/
    	    for(i=0;i<7;i++){
    		switch(i){
    		    case 0: double_data[0] = get_real(infile,0);break; /* x */
    		    case 1: double_data[1] = get_real(infile,0);break; /* y */
    		    case 2: double_data[2] = get_real(infile,0);break; /* x */
    		    case 3: double_data[3] = get_real(infile,0);break; /* y */
    		    case 4: double_data[4] = get_real(infile,0);break; /* x */
    		    case 5: double_data[5] = get_real(infile,0);break; /* y */
    		    case 6: stroke_color = get_color(infile,1);/* name or hex color */
    			decimals = find_number_of_digits(precision);
    			if( use_rotate == TRUE ){ rotate(6,angle,rotationcenter,2);}
    			if( use_affine == TRUE ){ transform(6,2);}
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
    			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
    			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);
    			if(onclick != 0){object_cnt++;}
    			/* object_cnt++;*/
    			reset();
    			break;
    		    default: break;
    		}
    	    }
    	    dragstuff[5] = 1;
    	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case TRIANGLES:
	/*
	 @ triangles color,x1,y1,x2,y2,x3,y3,...
	 @ use ftriangles or keyword <a href='#filled'>filled</a> for solid triangles
	 @ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	 @%triangles%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%onclick%triangles red,0,0,-4,4,6,8,0,0,-4,-4,6,-8,-6,6,8,6,5,1%# the same as 3 calls to command triangle
	*/
	    stroke_color = get_color(infile,0);/* name or hex color */
	    i = 0;
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */

	    while( ! done ){
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		double_data[0] = get_real(infile,0); /* x1 */
		double_data[1] = get_real(infile,0); /* y1 */
		double_data[2] = get_real(infile,0); /* x2 */
		double_data[3] = get_real(infile,0); /* y2 */
		double_data[4] = get_real(infile,0); /* x3 */
		double_data[5] = get_real(infile,1); /* y3 */
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,5,%s,[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,double_xy2js_array(double_data,6,decimals),line_width,stroke_color,stroke_opacity,stroke_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		if(onclick != 0){object_cnt++;}
		i = i + 6;
    	    }
    	    reset();
    	    dragstuff[5] = 1;
    	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;
	case USERBOXPLOT:
	/*
	 @ userboxplot
	 @ keyword, no arguments
	 @ use before command <a href="#boxplot">boxplot x_or_y,box-height_or_box-width,x_or_y-position</a>
	 @ if set, the student will have to calculate "min,Q1,median,Q3,max" and feed these data into the ''draw_boxplot`` function
	 @ for example: put the canvas-script into a html element with id='boxplot' and set style='display:none'<br>define a variable called ''student_boxplot`` and fill it with the 5 student-data (from inputfields or something)<br><code>var student_boxplot = new Array(5)<br>function show_boxplot(){<br>student_boxplot[0] = min;<br>student_boxplot[1] = Q1;<br>student_boxplot[2] = median;<br>student_boxplot[3] = Q3;<br>student_boxplot[4] = max;<br>document.getElementById('boxplot').style.display = "block";<br>draw_boxplot(12345,1,2.00,5.00,[0,0,0,0,0],4,"0,0,255",0.78,"255,165,0",0.60,1,0,1,1);<br>};</code><br>In the canvas-script the function draw_boxplot has the following arguments:<br>draw_boxplot=function(canvas_type,xy,hw,cxy,data,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype0,dashtype1)
	*/
	    js_function[DRAW_BOXPLOT] = 1;
	    fprintf(js_include_file,"var boxplot_source = 3;\n");
	    js_function[DRAW_JSBOXPLOT] = 2;
	break;

	case USERBOXPLOTDATA:
	/*
	 @ userboxplotdata
	 @ keyword, no arguments
	 @ use before command <a href="#boxplot">boxplot x_or_y,box-height_or_box-width,x_or_y-position</a>
	 @ if set, the student will have to generate some statistical data. These data should be put in a named array ''student_boxplot_data``
	 @ ''min,Q1,median,Q3,max`` are calculated by a js-function and the 'draw_boxplot' function will draw a boxplot.
	 @ see command <a href="#userboxplot">userboxplot</a> for calling 'draw_boxplot()'
	*/
	    js_function[DRAW_BOXPLOT] = 1;
	    fprintf(js_include_file,"var boxplot_source = 2;\n");
	    js_function[DRAW_JSBOXPLOT] = 1;

	break;

	case USERDRAW:
	/*
	@ userdraw object_type,color
	@ only a single object_type is allowed.
	@ right mouse click will remove last drawn object.
	@ for multiple different 'userdraw' objects in an exercise, use command <a href="#multidraw">multidraw</a>
	@ implemented object_type: <ul><li>point</li><li>points</li><li>crosshair</li><li>crosshairs</li><li>line</li><li>lines</li><li>vline</li><li>vlines</li><li>hline</li><li>hlines</li><li>demiline</li><li>demilines</li><li>segment</li><li>segments</li><li>polyline | brokenline</li><li>circle</li><li>circles</li><li>arrow</li><li>arrow2 (double arrow)</li><li>arrows</li><li>arrows2 (double arrows)</li><li>curvedarrow</li><li>curvedarrows</li><li>curvedarrow2</li><li>curvedarrows2</li><li>triangle</li><li>polygon</li><li>poly[3-9] (e.g poly3 ... poly7...poly9</li><li>rect</li><li>roundrect</li><li>rects</li><li>roundrects</li><li>freehandline | path</li><li>freehandlines | paths</li><li>clickfill: fill the clicked area with color<br>multiple areas may be selected <br>multiple colors may be provided using commands <a href='#colorpalette'>colorpalette color1,color2,color3,...</a> use <a href='#replyformat'>replyformat 10</a> for checking the user click color ... reply=x1:y1:color1,x2:y2:color2...<br/>attention: this will <b>not</b> work for pattern filling, because the pattern image is only generated once and after creation can not be changed !<br>the opacity of this image on a separate canvas is set to 0.01 and not 0 (!!)...in the ''fill algorithm`` the opacity of the matching pixels is set to 1</li><li>dotfill: fill the clicked area with a dot pattern; use command linewidth to change dot size</li><li>diamondfill: fill the clicked area with a diamond pattern</li><li>hatchfill: fill the clicked area with a hatch pattern</li><li>gridfill: fill the clicked area with a grid pattern</li><li>textfill: fill the clicked area with a repeating string<br>userdraw textfill,blue,some_text<br>use command <a href="#fontfamily">fontfamily</a> to adjust text style and size</li><li>''clickfill | pattern filling`` in general:<br>the clicks may be set <a href="#snaptogrid">snaptogrid</a><br>can be used together with command <a href="#floodfill">floodfill or fill</a><br><b>always</b> use together with command <a href="#clearbutton">clearbutton some_text</a> for removal of all click_colored areas<br>the function read_canvas() will return the click coordinates in the sequence of the user clicks<br>use command <a href="#canvastype">canvastype</a> to fill another canvas (default should be fine: DRAG_CANVAS = 5)</li><li>text <br>an inputfield is provided, unicode allowed. The text is drawn a the mouse click, or if used with command ''userinput inputfield`` also at the given x/y-coordonates</li><li>arc</li><li>arcs</li><li>image<br/>only a single "image" of every supported type(*) may be added to canvas window from the surrounding html page.<br>the image should have an 'id' and an onclick handler.<br>(*) supported types are ''svg``,''bitmap``,''p-element``,''div-element`` and ''mathml/tex-code`` with ''\\mmlid{int}``.</li><li>images</li><li>input<br/>place a single inputfield on ''canvas`` <br>use commands 'css' for css styling: use command ''linewidth`` for adjusting the input field size (default 1)</li><li>inputs<br/>place multiple inputfield: placing inputfields on top of each other is not possible</li><li>function : identical to <a href="#userinput">userinput function</a></li></ul>
	@ note: mouselisteners are only active if ''&#36;status != done`` (eg only drawing in an active/non-finished exercise) <br> to overrule use command/keyword ''status`` (no arguments required)
	@ note: object_type text: Any string or multiple strings may be placed anywhere on the canvas.<br>Use command ''fontfamily`` to set font
	@ note: object_type polygone: Will be finished (the object is closed) when clicked on the first point of the polygone again.
	@ note: all objects will be removed -after a javascript confirm box- when clicked on an object point with middle or right mouse button (e.g. event.button != 1: all buttons but left)
	@ use a prefix <a href='#filled'>filled</a> or ''f`` to set fillable objects filled. (fcircles,filledcircles etc)<br/> in case of ''fillpattern`` do not use the ''f`` prefix !
	@ for non solid filling, use command <a href="#fillpattern">fillpattern grid,hatch,diamond,dot</a>
	@ use <a href='#opacity'>opacity int,int</a> and <a href='#fillcolor'>fillcolor color</a> to trigger coloured filling of fillable objects
	@ use command ''dashed`` and/or ''dashtype int,int`` to trigger dashing
	@ use command ''replyformat int`` to control / adjust output formatting of javascript function read_canvas(); (the defaults should be fine...)
	@ may be combined with onclick or drag xy of other components of flyscript objects (although not very useful...)
	@ may be combined with keyword <a href='#userinput_xy'>userinput_xy</a>
	@ may be combined width the <a href='#snaptogrid'>snaptogrid snaptopoints </a> etc, to simplify the checking of the student reply
	@ the cursor may be appropriately styled using command <a href='cursor'>cursor</a>
	@ note: when zooming / panning after a drawing, the drawing will NOT be zoomed / panned...this is a "design" flaw and not a feature <br>To avoid trouble do not use zooming / panning together width userdraw.!<br>use command <a href="#multidraw">multidraw</a> is this is a problem for you...
	@ note: the default replyformat for ''userdraw input(s),color`` used format x1;y1;text1 \n x2;y2;test2 \n x_n;y_n;text_n (e.g. it is not a comma separated array...use ''direct exec`` to test)
	@ note: a special case is ''userdraw image,boguscolor``. Images (bitmap or svg or div) present in the exercise page and the img/svg/div-tag with an unique 'id' and <code>onclick='javascript:place_image_on_canvas(this.id)'</code> can be placed onto the canvas.<br>The ''id`` and (x;y) coordinates will be returned using read_canvas();<br> native MathML, MathJax or KaTeX typesetting may be included in div's.(experiments; wims_modules svn version only!)
	@ note: command <br><code>userdraw function,color</code> is identical to acombination of <code>strokecolor color</code> and <code>userinput function</code><br>
	@ note: commands :<br><code>multicolors red,green,blue<br>multilabel f(x)=:g(x)=:h(x)=<br>userdraw functions3,color</code><br>is identical to commands :<br><code>functionlabel f(x)=:p(x)=:w(x)=<br/>strokecolor red<br>userinput function <br>strokecolor green<br>userinput function <br>strokecolor blue<br>userinput function</code>
	@%userdraw_canvastype_a%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%grid 2,2,grey%replyformat 10%colorpalette orange,yellow,red,green,lightgreen,blue,lightblue,cyan%canvastype 4%userdraw clickfill,blue%clearbutton REMOVE LAST RECTANGLE
	@%userdraw_canvastype_b%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%canvastype 4%snaptogrid%replyformat 10%userdraw dotfill,blue%clearbutton REMOVE LAST RECTANGLE
	@%userdraw_rect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw rect,green
	@%userdraw_rects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw rects,green
	@%userdraw_frect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw frect,green
	@%userdraw_frects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw frects,green
	@%userdraw_roundrect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw roundrect,green
	@%userdraw_roundrects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw roundrects,green
	@%userdraw_froundrect%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw froundrect,green
	@%userdraw_froundrects%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw froundrects,green
	@%userdraw_line%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw line,green
	@%userdraw_lines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw lines,green
	@%userdraw_vline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw vline,green
	@%userdraw_vlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw vlines,green
	@%userdraw_hline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw hline,green
	@%userdraw_hlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw hlines,green
	@%userdraw_demiline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw demiline,green
	@%userdraw_demilines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw demilines,green
	@%userdraw_arc%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw arc,green
	@%userdraw_arcs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw arcs,green
	@%userdraw_point%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw point,green
	@%userdraw_points%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw points,green
	@%userdraw_arrow%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrow,green
	@%userdraw_arrows%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrows,green
	@%userdraw_arrow2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrow2,green
	@%userdraw_arrows2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw arrows2,green
	@%userdraw_curvedarrow%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrow,red%clearbutton REMOVE ALL ARROWS
	@%userdraw_curvedarrows%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrows,red%clearbutton REMOVE ALL ARROWS
	@%userdraw_curvedarrow2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrow2,red%clearbutton REMOVE ALL ARROWS
	@%userdraw_curvedarrows2%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%precision 1%linewidth 3%userdraw curvedarrows2,red%clearbutton REMOVE ALL ARROWS
	@%userdraw_crosshair%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw crosshair,green
	@%userdraw_crosshairs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw crosshairs,green
	@%userdraw_circle%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw circle,green
	@%userdraw_circles%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw circles,green
	@%userdraw_segment%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw segment,green
	@%userdraw_segments%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw segments,green
	@%userdraw_line%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw line,green
	@%userdraw_lines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw lines,green
	@%userdraw_triangle%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw triangle,green
	@%userdraw_poly5%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw poly5,green
	@%userdraw_filled_poly5%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw poly5,green
	@%userdraw_poly7%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw poly7,green
	@%userdraw_filled_poly7%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw poly7,green
	@%userdraw_polyline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%userdraw polyline,green
	@%userdraw_freehandline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw freehandline,green
	@%userdraw_filled_freehandline%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%fillcolor orange%opacity 200,50%filled%userdraw freehandline,green
	@%userdraw_freehandlines%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%opacity 200,50%userdraw freehandlines,green
	@%userdraw_input%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%userdraw input,green
	@%userdraw_inputs%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%userdraw inputs,green
	@%userdraw_text%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%fontfamily 42px Courier%userdraw text,green
	@%userdraw_function%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 1%grid 2,2,grey,2,2,5,grey%multicolors orange,red,green,blue,cyan%precision 1000%userdraw functions3,red%jscurve blue,x^2,-x^2,5*cos(x)%precision 1%mouse red,22
	@%userdraw_clickfill_colorpalette%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,4,1,1,6,3,3,3,-3,-3,5%opacity 255,120%colorpalette red,green,yellow,blue%userdraw clickfill,green
	@%userdraw_clickfill_1%size 400,400%xrange -10,10%yrange -10,10%linewidth 3%circles blue,0,0,4,1,1,6,3,3,3,-3,-3,5%opacity 255,120%userdraw clickfill,green
	@%userdraw_clickfill_2%size 400,400%xrange -10,10%yrange -10,10%linewidth 1%circles blue,0,0,2,1,1,5,5,5,4,-5,5,6,5,-5,6%userdraw hatchfill,red%#userdraw dotfill,red%#userdraw diamonefill,red%#userdraw gridfill,red
	@%userdraw_clickfill_2%size 400,400%xrange -10,10%yrange -10,10%bgcolor white%# to get nice click coordinates take invisible ''grid`` and use ''snaptogrid`` %grid 1,1,white%snaptogrid%circles blue,0,0,2,1,1,5,5,5,4,-5,5,6,5,-5,6%userdraw gridfill,red
	*/
	    if( use_userdraw != 0 ){ /* only one object type may be drawn*/
	    	canvas_error("Only one userdraw primitive may be used in command 'userdraw' use command 'multidraw' for this...");
	    }
	    js_function[INTERACTIVE] = 1;
	    draw_type = get_string_argument(infile,0);
	    if( strcmp(draw_type,"textfill") == 0){
	     fprintf(js_include_file,"var userdraw_text_string = \"%s\";", get_string(infile,1));
	    }
	    else
	    {
	     if( strcmp(draw_type,"imagefill") == 0){
	      fprintf(js_include_file,"var userdraw_image_url = \"%s\";", get_string(infile,1));
	     }
	     else
	     {
	      stroke_color = get_color(infile,1);
	     }
	    }

	    if( strcmp(draw_type,"clickfill") == 0){use_filled = 1;fill_color = stroke_color;}
	    reply_precision = precision;
	    use_userdraw = 1;
	    fprintf(js_include_file,"\n\
/* begin userdraw */\
userdraw_x = new Array();userdraw_y = new Array();userdraw_radius = new Array();\
var forbidden_zone=[xsize+1,ysize+1];var xy_cnt = 0;\
var canvas_userdraw = create_canvas%d(%d,xsize,ysize);\
var context_userdraw = canvas_userdraw.getContext(\"2d\");\
var use_dashed = %d;\
var use_snap = %d;if(use_dashed == 1){if( context_userdraw.setLineDash ){context_userdraw.setLineDash([%d,%d]);}else{if(context_userdraw.mozDash){context_userdraw.mozDash = [%d,%d];};};};\
context_userdraw.lineWidth = %d;var use_filled = %d;\
context_userdraw.strokeStyle =  \"rgba(%s,%.2f)\";\
context_userdraw.font = \"%s\";\
var user_is_dragging = false;\
if(wims_status != \"done\"){\
canvas_div.addEventListener(\"mousedown\" ,user_draw,false);\
canvas_div.addEventListener(\"mousemove\" ,user_drag,false);\
canvas_div.addEventListener(\"touchstart\",function(e){ e.preventDefault();user_draw(e.changedTouches[0]);},false);\
canvas_div.addEventListener(\"touchmove\" ,function(e){ e.preventDefault();user_drag(e.changedTouches[0]);},false);\
canvas_div.addEventListener(\"touchend\" ,function(e){ e.preventDefault();user_drawstop(e.changedTouches[0]);},false);\
};",canvas_root_id,DRAW_CANVAS,use_dashed,use_snap,dashtype[0],dashtype[1],dashtype[0],dashtype[1],line_width,use_filled,stroke_color,stroke_opacity,font_family);

	    if( use_filled == 0 ){
	     fprintf(js_include_file,"context_userdraw.fillStyle = \"rgba(255,255,255.0)\";");
	    }
	    else
	    {
	     if( use_filled == 1 ){
	      fprintf(js_include_file,"context_userdraw.fillStyle = \"rgba(%s,%.2f)\";",fill_color,fill_opacity);
	     }
	     else
	     {
	      js_function[DRAW_FILL_PATTERN] = 1;
	      fprintf(js_include_file,"context_userdraw.fillStyle = create_Pattern(0,0,%d,[%s]);\n",use_filled,fill_color);
	     }
	    }
	    add_js_userdraw(draw_type,stroke_color,stroke_opacity,crosshair_size,arrow_head,use_offset,css_class,use_snap,canvas_type,use_filled,fill_color,fill_opacity,line_width,font_family);
	    reset();
	break;

	case USERINPUT:
	/*
	 @ userinput function inputfield
	 @ alternative: userinput_function
	 @ alternative: userinput_xy
	 @ ''inputfield`` is only usable in combination with some ''userdraw draw_type``
	 @ note: the input fields are not cleared after the object is drawn...be aware of multiple idential drawings (many clicks on the ''ok`` button)
	 @ ''userinput function`` may be used any time (e.g. without userdraw)
	 @ multiple ''userinput function`` commands may be used.
	 @ use command <code>functionlabel some_string</code> to define the inputfield text: default value "f(x)="
	 @ use command <code>strokecolor some_color</code> to adjust the plot / functionlabel color
	 @ use command <code>css some_css</code> to adjust the inputfields
	 @ use command <code>fontsize int</code> to adjust the label fonts. (default 12px)
	 @ the user input for the function will be corrected by a simple ''rawmath`` implementation...<br>an error message will be shown if javascript can not interpret the user input
	 @%userinput_function%size 400,400%xrange -10,10%yrange -10,10%functionlabel your function g(x)=%axis%axisnumbering%xlabel x-axis%ylabel y-axis%grid 2,2,grey,3,3,5,grey%css color:blue;text-align:center%userinput function%# note: number of function inputs not limited
	 @%userinput_points%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%# adding 2 inputfields for x and y%userinput inputfield%userdraw points,blue
	 @%userinput_arrows%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%#adding 4 inputfields for (x1;y1)---(x2;y2)%userinput inputfieldd%userdraw arrows,blue
	 @%userinput_combined%size 400,400%xrange -10,10%yrange -10,10%functionlabel your function g(x)=%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 0%grid 2,2,grey,3,3,5,grey%css color:blue;text-align:center%precision 1000%strokecolor red%opacity 255,255%userinput function%# note: number of function inputs not limited%userdraw line,blue
	*/
	    temp = get_string_argument(infile,1);
	    if(strstr(temp,"function") != 0  || strstr(temp,"curve") != 0  || strstr(temp,"plot") != 0 ){
	     if( js_function[DRAW_JSFUNCTION] != 1 ){
	      js_function[JS_RAWMATH] = 1;
	      js_function[DRAW_JSFUNCTION] = 1;
	      if(reply_format == 0){reply_format = 24;}/* read canvas_input values */
	      add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
	      input_cnt++;
	     }
	     else
	     {
	      /* no need to add DRAW_JSFUNCTION, just call it with the parameters */
	      fprintf(js_include_file,"add_input_jsfunction(%d,\"%s\",%s,%d,\"%s\",\"%.2f\",%d,%d,%d,%d);\n",input_cnt,css_class,function_label,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],font_size);
	      input_cnt++;
	     }
	     js_function[JS_MATH] = 1;
	     js_function[JS_PLOT] = 1;
	    }
	    else
	    {
	     if(strstr(temp,"inputfield") != 0 ){
	      js_function[JS_SAFE_EVAL] = 1;
	      js_function[ADD_USER_INPUTS] = 1;
	     }
	     else
	     {
	      canvas_error("userinput argument may be \"function\" or \"inputfield\"");
	     }
	    }
	    break;
	case USERINPUT_XY:
	/*
	@ userinput_xy
	@ keyword (no arguments required)
	@ to be used in combination with command "userdraw object_type,color"
	@ if set two (or three) input fields are added to the document<br>(one for x-values, one for y-values and in case of drawing circle one for radius-values)
	@ the student may use this as correction for (x:y) on a drawing (or to draw without mouse, using just the coordinates)
	@ math input is allowed (e.g something like: 1+3,2*6,1/3,sqrt(3), sin(pi/4),10^-2,log(2)...)<br>eval function is ''protected`` against code injection.
	@ can <b>not</b> be combined with command ''intooltip tiptext`` <br>note: the ''tooltip div element`` is used for placing inputfields
	@ user drawings will not zoom on zooming (or pan on panning)
	@ use command ''css some_css`` to adjust the inputarea.
	@ use command ''fontsize int`` to adjust the text labels (if needed)
	@%userinput_xy%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%precision 0%grid 2,2,grey,3,3,6,black%# provides inputfields for (x1:y1)---(x2:y2)%userinput_xy%linewidth 2%precision 1000%userdraw lines,blue
	*/
	    /* add simple eval check to avoid code injection with unprotected eval(string) */
	    js_function[JS_SAFE_EVAL] = 1;
	    js_function[ADD_USER_INPUTS] = 1;
	    break;

	case USERINPUT_FUNCTION:
	/*
	@ userinput_function
	@ alternative: userinput
	@ keyword (no arguments required)
	@ if set, a inputfield will be added to the page
	@ repeat keyword for more function input fields
	@ the userinput value will be plotted in the canvas
	@ this value may be read with <code>read_canvas()</code>. <br>for do it yourself js-scripters: If this is the first inputfield in the script, its id is canvas_input0
	@ use before this command ''userinput_function``,<br>commands like ''css some_css``, ''xlabel some_description``, ''opacity int,int``, ''linewidth int``, ''dashed`` and ''dashtype int,int`` to modify
	@ fontsize can be set using command ''fontsize int``
	@ incompatible with command ''intooltip link_text_or_image``: it uses the tooltip div for adding the inputfield
	@%userinput_function%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel x-axis%ylabel y-axis%precision 0%grid 2,2,grey,2,2,5,grey%precision 1000%linewidth 2%# first inputfield%css color:blue;text-align:center;font-family:Italic;%strokecolor blue%functionlabel g(x)=:p(x)=:k(x)=%userinput function%# second inputfield%css color:green;text-align:center;font-family:Italic;%strokecolor green%userinput function%# third inputfield%css color:purple;text-align:center;font-family:Italic;%strokecolor purple%userinput function%# no limit in number of function inputfields
	*/
	    if( js_function[DRAW_JSFUNCTION] != 1 ){
	     js_function[DRAW_JSFUNCTION] = 1;
	     js_function[JS_RAWMATH] = 1;
	     if(reply_format == 0){reply_format = 24;}/* read canvas_input values */
	     add_input_jsfunction(css_class,function_label,input_cnt,stroke_color,stroke_opacity,line_width,use_dashed,dashtype[0],dashtype[1],font_size);
	     input_cnt++;
	    }
	    else
	    {
	      /* no need to add DRAW_JSFUNCTION, just call it with the parameters */
	     fprintf(js_include_file,"add_input_jsfunction(%d,\"%s\",%s,%d,\"%s\",\"%.2f\",%d,%d,%d,%d);\n",input_cnt,css_class,function_label,line_width,stroke_color,stroke_opacity,use_dashed,dashtype[0],dashtype[1],font_size);
	     input_cnt++;
	    }
	    js_function[JS_MATH] = 1;
	    js_function[JS_PLOT] = 1;
	    break;

	case VLINE:
	/*
	@ vline x,y,color
	@ alternative: verticalline
	@ draw a vertical line through point (x:y) in color 'color'
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a>
	@%vline%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%vline 0,0,red%onclick%vline 1,0,orange%onclick%vline 2,0,blue%onclick%vline 3,0,green
	*/
	    for(i=0;i<3;i++) {
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* x-values */
		    case 1: double_data[1] = get_real(infile,0);break; /* y-values */
		    case 2: stroke_color=get_color(infile,1);/* name or hex color */
			double_data[2] = double_data[0];
			decimals = find_number_of_digits(precision);
			if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
			string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,100*ymin,decimals,100*ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[0],decimals,double_data[2],decimals,100*ymin,decimals,100*ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
    			add_to_buffer(tmp_buffer);
    			if(onclick != 0){object_cnt++;}
			/* object_cnt++; */
			reset();
		    break;
		}
	    }
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case VLINES:
	/*
	@ vlines color,x1,y1,x2,y2....
	@ alternative: verticallines
	@ draw vertical lines through points (x1:y1),(x2:y2)... in color 'color'
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually
	@%vlines%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%vlines red,1,0,2,0,3,0,4,0
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    for(c = 0 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c],decimals,ymin,decimals,ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,4,[%.*f,%.*f],[%.*f,%.*f],[0],[0],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c],decimals,ymin,decimals,ymax,line_width,stroke_color,stroke_opacity,fill_color,fill_opacity,use_filled,use_dashed,dashtype[0],dashtype[1],use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		if(onclick != 0){object_cnt++;}
		/* object_cnt++; */
	    }
	    reset();
	    dragstuff[4] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case VIDEO:
	/*
	@ video x,y,w,h,videofile location
	@ x,y: left top corner of audio element (in xrange / yrange)
	@ w,y: width and height in pixels
	@ video format may be in *.mp4 (todo: other formats)
	@%video%size 400,400%xrange -10,10%yrange -10,10%opacity 200,100%frect -9,9,6,-6,green%video -5,5,200,200,http://techslides.com/demos/sample-videos/small.mp4
	*/
	    js_function[DRAW_VIDEO] = 1;
	    for(i=0;i<5;i++){
		switch(i){
		    case 0: int_data[0] = x2px(get_real(infile,0)); break; /* x in x/y-range coord system -> pixel */
		    case 1: int_data[1] = y2px(get_real(infile,0)); break; /* y in x/y-range coord system -> pixel */
		    case 2: int_data[2] = (int) (get_real(infile,0)); break; /* pixel width */
		    case 3: int_data[3] = (int) (get_real(infile,0)); break; /* height pixel height */
		    case 4: temp = get_string(infile,1);
			    string_length = 1 + snprintf(NULL,0,  "draw_video(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp);
			    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
			    snprintf(tmp_buffer,string_length,"draw_video(%d,%d,%d,%d,%d,\"%s\");\n",canvas_root_id,int_data[0],int_data[1],int_data[2],int_data[3],temp);
			    add_to_buffer(tmp_buffer);
			    break;
		    default:break;
		}
	    }
	    reset();
	    break;

	case X_AXIS_STRINGS:
	/*
	 @ xaxis num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
	 @ alternative: xaxistext
	 @ usable for commands <a href="#numberline">numberline</a> and <a href="#grid">grid</a> or combinations thereof
	 @ use these x-axis num1...num_n values instead of default xmin...xmax
	 @ in case of command ''grid``. there is no need to use keyword <a href="#axisnumbering">axisnumbering</a>
	 @ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
	 @ use command ''fontcolor``, ''fontfamily`` to adjust font <br>defaults: black,12,Arial<br>note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
	 @ a javascript error message will flag non-matching value:name pairs
	 @ if the ''x-axis words`` are too big and will overlap, a simple alternating offset will be applied
	 @ to be used before command grid (see <a href="#grid">command grid</a>)
	 @ ''xmajor`` steps should be synchronised with numbers eg. ''1`` in the next example <code>grid 1,100,grey,1,4,6,grey</code>
	 @%xaxistext%size 800,200%xrange -1,13%yrange -5,10%axis%xaxistext 1:january:2:february:3:march:4:april:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%grid 1,4,grey,1,2,10,red
	*/
	    use_axis_numbering++;
	    temp = get_string(infile,1);
	    if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
	    if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
	    fprintf(js_include_file,"x_strings[%d] = [\"%s\"];x_strings_up[%d] = null;",use_axis_numbering,temp,use_axis_numbering);
	    break;
	case X_AXIS_STRINGS_UP:
	/*
	 @ xaxisup num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
	 @ alternative: xaxistextup
	 @ the text will be rotated 90&deg; up
	 @ no need to use keyword <a href="#axisnumbering">axisnumbering</a>
	 @ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
	 @ use these x-axis num1...num_n values instead of default xmin...xmax
	 @ use command ''fontcolor``, <a href="#fontfamily">fontfamily</a> to adjust font <br>defaults: black,12,Arial<br>note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
	 @ a javascript error message will flag non-matching value:name pairs
	 @ if the ''x-axis words`` are too big, they will overlap the graph<br> (in this case the text will start from ysize upwards)
	 @ to be used before command grid (see <a href="#grid">command grid</a>)
	 @''xmajor`` steps should be synchronised with numbers eg. "1" in the next example <code>grid 1,100,grey,1,4,6,grey</code>
	 @%xaxistextup%size 800,300%xrange -1,13%yrange -10,10%fontfamily Italic 18pt Courier%axis%xaxistextup 1:january:2:february:3:march:4:april:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%grid 1,4,grey,1,2,10,red
	*/
	    use_axis_numbering++;
	    temp = get_string(infile,1);
	    if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
	    if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
	    fprintf(js_include_file,"x_strings_up[%d] = 1;x_strings[%d] = [\"%s\"];",use_axis_numbering,use_axis_numbering,temp);
	    break;

	case XERRORBARS:
	/*
	@ xerrorbars color,E1,E2,x1,y1,x2,y2,...,x_n,y_n
	@ draw multiple points with x-errorbars E1 (error value left from point) and E2 (error value right from point) at given coordinates in color 'color'
	@ the errors E1 and E2 values are in xrange.
	@ use command ''linewidth int`` to adust size
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	@%xerrorbars%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%drag xy%xerrorbars red,0.8,1.3,0,0,1,1,2,3,3,2,4,5,5,2,6,1,-1,-2,-2,0,-3,2,-4,4,-5,-1

	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    decimals = find_number_of_digits(precision);
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    for(c = 2 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,20,[%.*f],[%.*f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,20,[%.*f],[%.*f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		/* object_cnt++; */
		if(onclick != 0){object_cnt++;}
	    }
	    reset();
	    dragstuff[20] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1; }
	    break;

	case NEWRANGE:
	/*
	@ newrange xmin,xmax,ymin,ymax
	@ objects defined after command will make use of this new range
	@ https://wimsedu.info/?topic=dessiner-des-portions-de-fonctions-sur-un-meme-graphe
	*/
	    for(i = 0 ; i<4; i++){
		switch(i){
		    case 0: xmin = get_real(infile,0);break;
		    case 1: xmax = get_real(infile,0);break;
		    case 2: ymin = get_real(infile,0);break;
		    case 3: ymax = get_real(infile,1);break;
		    default: break;
		}
	    }
	    string_length = 1 + snprintf(NULL,0,"\n\nxmin = %f;xmax = %f;ymin = %f;ymax = %f;\n\n",xmin,xmax,ymin,ymax);
	    check_string_length(string_length);tmp_buffer = my_newmem(string_length);
	    snprintf(tmp_buffer,string_length,"\n\nxmin = %f;xmax = %f;ymin = %f;ymax = %f;\n\n",xmin,xmax,ymin,ymax);
	    add_to_buffer(tmp_buffer);
	    break;

	case XRANGE:
	/*
	@ xrange xmin,xmax
	@ alternative: rangex
	@ if not given: 0,xsize (eg in pixels)
	*/
	    for(i = 0 ; i<2; i++){
		switch(i){
		    case 0: xmin = get_real(infile,0);break;
		    case 1: xmax = get_real(infile,1);break;
		    default: break;
		}
	    }
	    if(xmin >= xmax){canvas_error(" xrange is not OK: xmin &lt; xmax !");}
	    fprintf(js_include_file,"var xmin = %f;var xmax = %f;",xmin,xmax);
	    found_size_command++;
	    break;

	case XSNAPTOGRID:
	/*
	 @ xsnaptogrid
	 @ keyword (no arguments required)
	 @ a draggable object (use command ''drag x|y|xy``) will snap to the given x-grid values when dragged (mouseup)
	 @ in case of userdraw the drawn points will snap to xmajor grid
	 @ if no grid is defined, points will snap to every integer xrange value. (eg snap_x=1)
	 @ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
	 @ if xminor is defined (use keyword ''axis`` to activate xminor), the drawing will snap to xminor <br>use only even dividers in x-minor...for example<br><code>xsnaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code><br> will snap on x=0, x=0.5, x=1, x=1.5 ....<br> will snap on y=0, y=0.25 y=0.5 y=0.75 ...<br>
	 @%xsnaptogrid_1%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 2%xsnaptogrid%userdraw segments,red%precision 1%display x,red,12
	 @%xsnaptogrid_2%size 400,400%xrange -10,10%yrange -10,10%grid 1,1,grey%linewidth 3%drag x%points red,0,0,0,0,0,0,0,0,0,0

	*/
	use_snap = 2;
	break;

	case XOFFSET:
	/*
	 @ xoffset
	 @ keyword ; to place the text centered above the text coordinates(x:y) ...
	 @ may be used for points or other things requiring centered labels
	 @ use <a href="#fontfamily">fontfamily</a> for setting the font
	 @ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-library)
	@%xoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
	*/
	 use_offset = 2;
	 break;

	case XYOFFSET:
	/*
	 @ xyoffset
	 @ keyword ; to place the text (x:y) to (x+dx:y+dy)... dx/dy are dependent on fontsize/fontfamily
	 @ may be used for points or other things requiring labels
	 @ use <a href="#fontfamily">fontfamily</a> for setting the font
	 @ only active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-librariy
	 @ in case of inputfields the inputfield will be centered x and y on its coordinates.<br>for example:<br>inputs 1,1,10,? <br>point 1,1,red <br> the point will be completely invisible<br>note: keyword ''xyoffset`` will also provide centering if used with <a href='#userdraw'>input(s),color</a>
	 @%xyoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
	*/
	 use_offset = 3;
	 break;

	case XUNIT:
	/*
	 @ xunit some_unit_for_x-values
	 @ unicode allowed (no html code)
	 @ use together with command <a href="#display">display or mouse</a>
	 @ will display the cursor x-coordinate in ''unit``
	 @%xunit%size 400,400%xrange -10,10%yrange -10,10%xunit cm \\u00B2%grid 2,2,grey%linewidth 2%userdraw segments,blue%display x,blue,18
	*/
	    fprintf(js_include_file,"unit_x = \"%s\";",get_string(infile,1));
	    break;

	case XLABEL:
	/*
	@ xlabel some_string
	@ will be used to create a label for the x-axis (label is in quadrant I)
	@ can only be used together with command ''grid``<br>not depending on keywords ''axis`` and ''axisnumbering``
	@ font setting: italic Courier, fontsize will be slightly larger (fontsize + 4)<br>use command ''fontsize`` to adjust.<br>(command ''fontfamily`` is not active for this command)
	@ use <a href="#ylabel">ylabel</a>
	@%xlabel%size 400,400%xrange -10,10%yrange -10,10%axis%axisnumbering%xlabel cm\\u00B2 %ylabel v\\u00B2 %precision 1%grid 2,2,grey,2,2,5,grey
	*/
	    temp = get_string(infile,1);
	    fprintf(js_include_file,"var xaxislabel = \"%s\";",temp);
	    break;

	case XLOGBASE:
	/*
	@ xlogbase number
	@ sets the logbase number for the x-axis
	@ default value 10
	@ use together with commands xlogscale / xylogscale
	*/
	    fprintf(js_include_file,"xlogbase=%d;",(int)(get_real(infile,1)));
	    break;

	case XLOGSCALE:
	/*
	 @ xlogscale ymajor,yminor,majorcolor,minorcolor
	 @ the x/y-range are set using commands <code>xrange xmin,xmax</code> and <code>yrange ymin,ymax</code>
	 @ ymajor is the major step on the y-axis; yminor is the divisor for the y-step
	 @ the linewidth is set using command ''linewidth int``
	 @ the opacity of major / minor grid lines is set by command <a href='#opacity'>opacity</a>
	 @ default logbase number = 10 ... when needed, set the logbase number with command ''xlogbase number``
	 @ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use command ''precision`` before ''xlogscale`` command to set the precision (decimals) of the axis numbering</li><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the colour</li></ul>
	 @ note: the complete canvas will be used for the ''log paper``
	 @ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
	 @ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
	 @ note: when using something like ''xrange 0.0001,0.01``...combined with commands <a href='#mouse'>mouse</a> and/or <a href='#userdraw'>userdraw</a>...<br> make sure the <a href='#precision'>precision</a> is set accordingly
	 @ note: in case of userdraw, the use of keyword <a href='#userinput_xy'>userinput_xy</a> may be handy !
	 @ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
	 @ <b>attention</b>: do not use command ''zoom``
	 @%xlogscale%size 400,400%xrange 10,50000%yrange -5,5%xlabel x-axis%ylabel y-axis%xlogscale 10,1,black,grey%display x,red,22
	*/
	    use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
	    if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
	    js_function[DRAW_XLOGSCALE] = 1;
	    for(i=0;i<4;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* xmajor */
		    case 1: int_data[0] = (int) (get_real(infile,0));break; /* xminor */
		    case 2: stroke_color = get_color(infile,0); break;
		    case 3: fill_color = get_color(infile,1);
			string_length = 1 + snprintf(NULL,0,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision);
			tmp_buffer = my_newmem(string_length);
		        snprintf(tmp_buffer,string_length,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision);
		        fprintf(js_include_file,"use_xlogscale=1;snap_y = %f;snap_x = xlogbase;",double_data[0]/int_data[0]);
			add_to_buffer(tmp_buffer);
		        break;
		    default:break;
		}
	    }
	    break;

	case XYLOGSCALE:
	/*
	 @ xylogscale majorcolor,minorcolor
	 @ the x/y-range are set using commands ''xrange xmin,xmax`` and ''yrange ymin,ymax``
	 @ the linewidth is set using command ''linewidth int``
	 @ the opacity of major / minor grid lines is set by command ''opacity [0-255],[0-255]``
	 @ default logbase number = 10 ... when needed, set the logbase number with command ''xlogbase number`` and/or ''ylogbase number``
	 @ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the colour</li></ul>
	 @ note: the complete canvas will be used for the ''log paper``
	 @ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
	 @ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
	 @ note: when using something like ''yrange 0.0001,0.01``...combined with commands ''mouse color,fontsize`` and/or ''userdraw type,color``...<br> make sure the precision is set accordingly (eg command ''precision 10000``)
	 @ note: in case of userdraw, the use of keyword ''userinput_xy`` may be handy !
	 @ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
	 @ <b>attention</b>: do not use command ''zoom``
	 @%xylogscale%size 400,400%xrange 10,50000%yrange 10,50000%xlabel x-axis%ylabel y-axis%xylogscale black,grey%display xy,red,22
	*/
	    use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
	    if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
	    js_function[DRAW_XYLOGSCALE] = 1;
	    for(i=0;i<2;i++){
		switch(i){
		    case 0: stroke_color = get_color(infile,0); break;
		    case 1: fill_color = get_color(infile,1);
			string_length = 1 + snprintf(NULL,0,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,precision);
			tmp_buffer = my_newmem(string_length);
		        snprintf(tmp_buffer,string_length,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,precision);
		        fprintf(js_include_file,"use_xlogscale=1;use_ylogscale=1;snap_x = xlogbase;snap_y = ylogbase;");
			add_to_buffer(tmp_buffer);
		        break;
		    default:break;
		}
	    }
	break;


	case Y_AXIS_STRINGS:
	/*
	 @ yaxis num1:string1:num2:string2:num3:string3:num4:string4:....num_n:string_n
	 @ alternative: yaxistext
	 @ use command ''fontcolor``, ''fontfamily`` to adjust font <br>defaults: black,12,Arial<br> note: command ''fontsize`` is not active for this command.(''fontsize`` can be used for the <a href="#legend">legend</a> in a <a href="#grid">grid</a>)
	 @ no need to use keyword <a href="#axisnumbering">axisnumbering</a>
	 @ use command <a href="#axis">axis</a> to have visual x/y-axis lines (see command <a href="#grid">grid</a>
	 @ use these y-axis num1...num_n values instead of default ymin...ymax
	 @ a javascript error message will flag non-matching value:name pairs
	 @ to be used before command grid (see <a href="#grid">command grid</a>)
	 @%yaxistext%size 400,400%yrange 0,13%xrange -100,500%axis%yaxis 1:january:2:february:3:march:5:may:6:june:7:july:8:august:9:september:10:october:11:november:12:december%#'ymajor' steps should be synchronised with numbers eg. "1" in this example%grid 100,1,grey,4,1,6,grey
	*/
	    temp = get_string(infile,1);
	    if( strstr(temp,":") != 0 ){ temp = str_replace(temp,":","\",\"");}
	    if( strstr(temp,"pi") != 0 ){ temp = str_replace(temp,"pi","(3.1415927)");}/* we need to replace pi for javascript y-value*/
	    fprintf(js_include_file,"y_strings = [\"%s\"];\n ",temp);
	    use_axis_numbering++;
	    break;


	case YERRORBARS:
	/*
	@ yerrorbars color,E1,E2,x1,y1,x2,y2,...,x_n,y_n
	@ draw multiple points with y-errorbars E1 (error value under point) and E2 (error value above point) at given coordinates in color 'color'
	@ the errors E1 and E2 values are in yrange.
	@ use command ''linewidth int`` to adust size
	@ may be set <a href="#drag">draggable</a> / <a href="#onclick">onclick</a> individually (!)
	@%yerrorbars%size 400,400%xrange -10,10%yrange -10,10%linewidth 2%onclick%yerrorbars red,0.8,1.3,0,0,1,1,2,3,3,2,4,5,5,2,6,1,-1,-2,-2,0,-3,2,-4,4,-5,-1
	*/
	    stroke_color=get_color(infile,0); /* how nice: now the color comes first...*/
	    fill_color = stroke_color;
	    i=0;
	    while( ! done ){     /* get next item until EOL*/
		if(i > MAX_INT - 1){canvas_error("too many points in argument: repeat command multiple times to fit");}
		if(i%2 == 0 ){
		    double_data[i] = get_real(infile,0); /* x */
		}
		else
		{
		    double_data[i] = get_real(infile,1); /* y */
		}
		i++;
	    }
	    if( use_slider != -1 && onclick == 0){ onclick = 3; }/* no drag&onclick but slideable */
	    for(c = 2 ; c < i-1 ; c = c+2){
		string_length = 1 + snprintf(NULL,0,"dragstuff.addShape(new Shape(%d,%d,%d,%d,19,[%.*f],[%.*f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		check_string_length(string_length);tmp_buffer = my_newmem(string_length);
		snprintf(tmp_buffer,string_length,"dragstuff.addShape(new Shape(%d,%d,%d,%d,19,[%.*f],[%.*f],[%.2f],[%.2f],%d,\"%s\",%.2f,\"%s\",%.2f,%d,%d,%d,%d,%d,%.1f,\"%s\",%d,\"%s\",%s,%s,%d));\n",drag_type,object_cnt,onclick,use_snap,decimals,double_data[c],decimals,double_data[c+1],double_data[0],double_data[1],line_width,stroke_color,stroke_opacity,stroke_color,stroke_opacity,1,0,0,0,use_rotate,angle,flytext,font_size,font_family,my_sliders,rotation_center,use_offset);
		add_to_buffer(tmp_buffer);
		/* object_cnt++; */
		if(onclick != 0){object_cnt++;}
	    }
	    decimals = find_number_of_digits(precision);
	    reset();
	    dragstuff[19] = 1;
	    if(use_dragstuff == 0 ){ use_dragstuff = 1;}
	    break;
	case YOFFSET:
	/*
	 @ yoffset
	 @ keyword; to place the text centered above the text coordinates(x:y) ...
	 @ may be used for points or other things requiring centered labels
	 @ use <a href="#fontfamily">fontfamily</a> for setting the font
	 @ may be active for commands <a href="#text">text</a> and <a href="#string">string</a> (e.g. objects in the drag/drop/onclick-library)
	 @%yoffset%size 400,400%xrange -10,10%yrange -10,10%fontfamily 12pt Arial%string blue,-9,-9,no offset%point -9,-9,red%centered%string blue,-6,-6,centered%point -6,-6,red%xoffset%string blue,-3,-3,xoffset%point -3,-3,red%yoffset%string blue,0,0,yoffset%point 0,0,red%xyoffset%string blue,3,3,xyoffset%point 3,3,red%resetoffset%string blue,6,6,resetoffset%point 6,6,red
	*/
	 use_offset = 1;
	 break;

	case YRANGE:
	/*
	@ yrange ymin,ymax
	@ alternative: rangey
	@ if not given 0,ysize (eg in pixels)
	*/
	    for(i = 0 ; i<2; i++){
		switch(i){
		    case 0: ymin = get_real(infile,0);break;
		    case 1: ymax = get_real(infile,1);break;
		    default: break;
		}
	    }
	    if(ymin >= ymax){canvas_error(" yrange is not OK: ymin &lt; ymax !<br>");}
	    fprintf(js_include_file,"var ymin = %f;var ymax = %f;",ymin,ymax);
	    found_size_command++;
	    break;

	case YSNAPTOGRID:
	/*
	 @ ysnaptogrid
	 @ keyword (no arguments required)
	 @ a draggable object (use command ''drag x|y|xy``) will snap to the given y-grid values when dragged (mouseup)
	 @ in case of userdraw the drawn points will snap to ymajor grid
	 @ if no grid is defined, points will snap to every integer yrange value. (eg snap_y=1)
	 @ if you do not want a visible grid, but you only want a ''snaptogrid`` with some value...define this grid with opacity 0.
	 @ if yminor is defined (use keyword ''axis`` to activate yminor), the drawing will snap to yminor <br>use only even dividers in y-minor...for example<br><code>ysnaptogrid<br>axis<br>grid 2,1,grey,4,4,7,red</code><br> will snap on x=0, x=0.5, x=1, x=1.5 ....<br> will snap on y=0, y=0.25 y=0.5 y=0.75 ...<br>
	 @%ysnaptogrid_1%size 400,400%xrange -10,10%yrange -10,10%ysnaptogrid%grid 1,1,grey%linewidth 2%userdraw crosshairs,blue%css font-size:8px;color:blue%clearbutton delete all crosshairs
	 @%ysnaptogrid_2%size 400,400%xrange -10,10%yrange -10,10%ysnaptogrid%grid 1,1,grey%linewidth 3%drag y%points red,0,0,0,0,0,0,0,0,0,0
	*/
	use_snap = 3;
	break;

	case YLABEL:
	/*
	@ ylabel some_string
	@ will be used to create a (vertical) label for the y-axis (label is in quadrant I)
	@ can only be used together with command <a href="#grid">grid</a><br>not depending on keywords ''axis`` and ''axisnumbering``
	@ font setting: italic Courier, fontsize will be slightly larger (fontsize + 4)<br>use command ''fontsize`` to adjust (command ''fontsize`` is not active for this command)
	@ use <a href="#xlabel">xlabel</a>
	@%ylabel%size 400,400%xrange -10,10%yrange -10,10%fontsize 8%axis%axisnumbering%precision 1%xlabel x-axis%ylabel y-axis%grid 1,1,grey,2,2,2,red
	*/
	    temp = get_string(infile,1);
	    fprintf(js_include_file,"var yaxislabel = \"%s\";",temp);
	    break;
	case YLOGBASE:
	/*
	@ ylogbase number
	@ sets the logbase number for the y-axis
	@ default value 10
	@ use together with commands ylogscale / xylogscale
	*/
	    fprintf(js_include_file,"ylogbase=%d;",(int)(get_real(infile,1)));
	    break;
	case YLOGSCALE:
	/*
	 @ ylogscale xmajor,xminor,majorcolor,minorcolor
	 @ the x/y-range are set using commands ''xrange xmin,xmax`` and ''yrange ymin,ymax``
	 @ xmajor is the major step on the x-axis; xminor is the divisor for the x-step
	 @ the linewidth is set using command ''linewidth int``
	 @ the opacity of major / minor grid lines is set by command ''opacity [0-255],[0-255]``
	 @ default logbase number = 10 ... when needed, set the logbase number with command ''ylogbase number``
	 @ the x/y- axis numbering is triggered by keyword ''axisnumbering``<ul><li>use command ''precision`` before ''ylogscale`` command to set the precision (decimals) of the axis numbering</li><li>use commands ''xlabel some_text`` and/or ''ylabel some_text`` for text on axis: use command ''fontsize int`` to set the fontsize (default 12px)</li><li>use command ''fontfamily fnt_family_string`` to set the fonts for axis-numbering</li><li>use command ''fontcolor`` to set the color</li></ul>
	 @ note: the complete canvas will be used for the ''log paper``
	 @ note: userdrawings are done in the log paper, e.g. javascript:read_canvas() will return the real values
	 @ note: command ''mouse color,fontsize`` will show the real values in the logpaper.<br>\
	 @ note: when using something like ''yrange 0.0001,0.01``...combined with commands ''mouse color,fontsize`` and/or ''userdraw type,color``...<br> make sure the precision is set accordingly (eg command ''precision 10000``)
	 @ note: in case of userdraw, the use of keyword ''userinput_xy`` may be handy !
	 @ <b>attention</b>: do not use command ''zoom``
	 @ <b>attention</b>: keyword ''snaptogrid`` may not lead to the desired result...
	*/
	    use_axis_numbering++;if(use_axis_numbering > 1){use_axis_numbering = 1;}
	    if( js_function[DRAW_GRID] == 1 ){canvas_error("only one type of grid is allowed...");}
	    js_function[DRAW_YLOGSCALE] = 1;
	    for(i=0;i<4;i++){
		switch(i){
		    case 0: double_data[0] = get_real(infile,0);break; /* xmajor */
		    case 1: int_data[0] = (int) (get_real(infile,0));break; /* xminor */
		    case 2: stroke_color = get_color(infile,0); break;
		    case 3: fill_color = get_color(infile,1);
			string_length = 1 + snprintf(NULL,0,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision);
			tmp_buffer = my_newmem(string_length);
		        snprintf(tmp_buffer,string_length,"draw_grid%d(%d,%d,\"%s\",\"%s\",%.2f,%.2f,%d,\"%s\",\"%s\",%d,%f,%d,%d); ",canvas_root_id,GRID_CANVAS,line_width,stroke_color,fill_color,stroke_opacity,fill_opacity,font_size,font_family,font_color,use_axis_numbering,double_data[0],int_data[0],precision);
		        fprintf(js_include_file,"use_ylogscale=1;snap_x = %f;snap_y = ylogbase;",double_data[0]/int_data[0]);
			add_to_buffer(tmp_buffer);
		        break;
		    default:break;
		}
	    }
	    break;

	case YUNIT:
	/*
	 @ yunit some_unit_for_y-values
	 @ unicode allowed (no html code)
	 @ use together with command mousey
	 @ will display the cursor y-coordinate in ''unit``
	*/
	    fprintf(js_include_file,"unit_y = \"%s\";",get_string(infile,1));
	    break;

	case ZOOM:
	/*
	 @ zoom button_color
	 @ introduce a very small ''controlpanel`` at the lower right corner (font size of the panel is fixed to: 22px Arial)
	 @ giving six 15&times;15px ''active`` rectangle areas<br>(''&times;,&darr;,&uarr;,&larr;,&rarr;,&minus;,+``) for zooming and/or panning of the image
	 @ a mouse wheel is active for in/out zooming. Drag panning is not supported (this will conflict with many ''userdraw`` or ''multidraw`` primitives)
	 @ the ''controlpanel`` is not active for a ''userdraw`` mousedown (but it can interfere with some ''userdraw`` types)
	 @ the ''&times;`` symbol will reset to your original xmax/xmin ymax/ymin values.
	 @ choose an appropriate color, so the small ''&times;,&darr;,&uarr;,&larr;,&rarr;,&minus;,+`` are clearly visible
	 @ command ''opacity`` may be used to set stroke_opacity of buttons
	 @ note: on zooming, text will not increase / decrease the font size (todo??)
	 @ note: adding ''zooming`` will increase the size of the javascript include with approx. 11 kb
	*/
	    js_function[INTERACTIVE] = 1;
	    js_function[JS_ZOOM] = 1;
	    if( use_userdraw == 1 ){
	      js_function[USERDRAW_AND_ZOOM] = 1;
	      fprintf(js_include_file,"forbidden_zone = [%d,%d];",xsize-115,ysize - 20);
	    }
	    if(jsplot_cnt != -1){ js_function[JSPLOT_AND_ZOOM] = 1;}
	    stroke_color = get_color(infile,1);
	    /* we use BG_CANVAS (0) */
	    add_js_zoom_buttons(stroke_color,stroke_opacity);
	    done = TRUE;
	    break;

/* ready */
	default:sync_input(infile);
	break;
    }
  }
  /* we are done parsing script file */
  if(use_dragstuff != 0){
  /*  add the 20kb drag code: nearly always used ... use_dragstuff==1: no-mouse ! */
     add_drag_code(DRAG_CANVAS,use_dragstuff,dragstuff,reply_format);
     if(js_function[JS_ZOOM] == 1){
        js_function[DRAG_AND_ZOOM] = 1;
     }
  }

  /* check if xrange / yrange was set explicit ... or use xmin=0 xmax=xsize ymin=0 ymax=ysize: Quadrant I */
  if( found_size_command == 1 ){
    fprintf(js_include_file,"var xmin = 0;var xmax = %d;var ymin = 0;var ymax = %d",xsize,ysize);
  }
  else
  {
    if( found_size_command != 3 ){
     canvas_error("Please specify size first and then both xrange and yrange ...");
    }
  }

  /* if needed, add generic draw functions (grid / xml etc) to buffer: these are no draggable/clickable shapes / objects  ! */
  add_javascript_function();
   /* add read_canvas() etc functions if needed */
  if( reply_format > 0 ){ add_read_canvas(reply_format,reply_precision);}
  /* no zoom, just add buffer */
  fprintf(js_include_file,"\n/* add buffer */\n%s};\n/* end wims_canvas_function */\nwims_canvas_function%d();\n",buffer,canvas_root_id);
/* done writing the javascript include file */
fclose(js_include_file);
}

/* if using a tooltip, this should always be printed to the *.phtml file, so stdout */
 if( use_tooltip > 0 ){
  if( use_tooltip == 1 ){
   add_js_tooltip(tooltip_text,bgcolor);
  }
  else
  {
   if( use_tooltip == 2 ){
    add_js_popup(getfile_cmd);
   }
  }
 }
exit(EXIT_SUCCESS);
}
/* end main() */


/******************************************************************************
**
**  sync_input
**
**  synchronises input line - reads to end of line, leaving file pointer
**  at first character of next line.
**
**  Used by:
**  main program - error handling.
**
******************************************************************************/
void sync_input(FILE *infile)
{
	int c = 0;

	if( c == '\n' || c == ';' ) return;
	while( ( (c=getc(infile)) != EOF ) && (c != '\n') && (c != '\r') && (c != ';')) ;
	if( c == EOF ) finished = 1;
	if( c == '\n' || c == '\r' || c == ';') line_number++;
	return;
}

/******************************************************************************/


void transform(int num,int incr){
/*.
only "double_data[]" is used for transformations !!
*/
 int i;int ii;double x,y;
 for(i=0;i<num;i = i+incr){
  ii = i+1;
  x = double_data[i]*affine_matrix[0] + double_data[ii]*affine_matrix[1]+affine_matrix[4];
  y = double_data[i]*affine_matrix[2] + double_data[ii]*affine_matrix[3]+affine_matrix[5];
 /*
  printf("(%f:%f) &rarr; (%f:%f)<br>",double_data[i],double_data[ii],x,y);
 */
  double_data[i] = x;
  double_data[ii] = y;
 }
}

void rotate(int num,double angle,double center[],int incr){
 int i;int ii;double rad = angle * 0.0174532925199;
 double c = cos(rad);
 double s = sin(rad);
 double x,y;
 for(i=0;i<num;i = i+incr){
  ii = i+1;
  x = c*(double_data[i]-center[0]) + s*(double_data[ii] - center[1] ) + center[0];
  y = c*(double_data[ii]-center[1]) - s*(double_data[i] - center[0] ) + center[1];
  double_data[i] = x;
  double_data[ii] = y;
 // printf("(x:y) - (%f:%f)<br>",x,y);
 }
}
/* not used: see transform()
void translate(int num){
 int i;int ii;
 double x,y;
 for(i=0;i<num;i = i+2){
  ii = i+1;
  x = double_data[i] + affine_matrix[4];
  y = double_data[ii] + affine_matrix[5];
  double_data[i] = x;
  double_data[ii] = y;
 }
}
*/
char *str_replace(const char *str, const char *old, const char *new){
    if(strlen(str) > MAX_BUFFER){canvas_error("string argument too big");}
    char *ret, *r;
    const char *p, *q;
    size_t oldlen = strlen(old);
    size_t count = 0;
    size_t retlen = 0;
    size_t newlen = strlen(new);
    if (oldlen != newlen){
	for (count = 0, p = str; (q = strstr(p, old)) != NULL; p = q + oldlen){
	    count++;
	    retlen = p - str + strlen(p) + count * (newlen - oldlen);
	}
    }
    else
    {
	retlen = strlen(str);
    }

    if ((ret = malloc(retlen + 1)) == NULL){
	ret = NULL;
	canvas_error("string argument is NULL");
    }
    else
    {
	for (r = ret, p = str; (q = strstr(p, old)) != NULL; p = q + oldlen) {
	    size_t l = q - p;
	    memcpy(r, p, l);
	    r += l;
	    memcpy(r, new, newlen);
	    r += newlen;
	}
	strcpy(r, p);
    }
    return ret;
}

/******************************************************************************/

char *get_color(FILE *infile , int last){
    int c,i = 0,is_hex = 0;
    char temp[MAX_COLOR_STRING], *string;
    const char *not_allowed = "0123456789";
    while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != ',' ) && ( c != ';' )  && ( c != '\t' ) ){
	if( i > MAX_COLOR_STRING ){ canvas_error("colour string is too big ... ? ");}
	if( c == '#' ){
	    is_hex = 1;
	}
	if( c != ' '){
	    if( is_hex == 0 ){if(strchr(not_allowed,c) != 0){canvas_error("found something like a number...but is should have been a colour or #hex color number...<br>Do not use R,G,B !!! ");}}
	    temp[i]=tolower(c);
	    i++;
	}
    }
    if( ( c == '\n' || c == EOF || c == ';' || c == '\t' ) && last == 0){canvas_error("expecting more arguments in command");}
    if( c == '\n' || c == ';'  || c == '\t' ){ done = TRUE; line_number++; }
    if( c == EOF ){finished = 1;}
    if( finished == 1 && last != 1 ){ canvas_error("expected more arguments");}
    temp[i]='\0';
    if( strlen(temp) == 0 ){ canvas_error("expected a colorname or hexnumber, but found nothing !!");}
    if( is_hex == 1 ){
	char red[3], green[3], blue[3];
	red[0]   = toupper(temp[1]); red[1]   = toupper(temp[2]); red[2]   = '\0';
	green[0] = toupper(temp[3]); green[1] = toupper(temp[4]); green[2] = '\0';
	blue[0]  = toupper(temp[5]); blue[1]  = toupper(temp[6]); blue[2]  = '\0';
	int r = (int) strtol(red,   NULL, 16);
	int g = (int) strtol(green, NULL, 16);
	int b = (int) strtol(blue,  NULL, 16);
	int L0 = 1+snprintf(NULL,0,"%d,%d,%d",r,g,b);
        string = my_newmem(L0);
	snprintf(string,L0,"%d,%d,%d",r,g,b);
	return string;
    }
    else
    {
        string = (char *)my_newmem(sizeof(temp));
	snprintf(string,sizeof(temp),"%s",temp);
	for( i = 0; i < NUMBER_OF_COLORNAMES ; i++ ){
	    if( strcmp( colors[i].name , string ) == 0 ){
		return colors[i].rgb;
	    }
	}
	canvas_error("I was expecting a color name or hexnumber...but found nothing.");
    }
    return "0,0,255";
}

char *get_string(FILE *infile,int last){ /* last = 0: more arguments ; last=1 final argument */
    int c,i=0;
    char  temp[MAX_BUFFER], *string;
    while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != '\t') ){
	temp[i]=c;
	i++;
	if(i > MAX_BUFFER){ canvas_error("string size too big...repeat command to fit string");break;}
    }
    if( ( c == '\n' ||  c == '\t'  || c == EOF ) && last == 0){canvas_error("expecting more arguments in command");}
    if( c == '\n' ||  c == '\t') { done = TRUE; line_number++; }
    if( c == EOF ) {finished = 1;}
    temp[i]='\0';
    if( strlen(temp) == 0 && last != 3 ){ canvas_error("expected a word or string, but found nothing!");}
    string=(char *)my_newmem(strlen(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    return string;
}

char *get_string_argument(FILE *infile,int last){  /* last = 0: more arguments ; last=1 final argument */
    int c,i=0;
    char temp[MAX_BUFFER], *string;
    while(( (c=getc(infile)) != EOF ) && ( c != '\n') && ( c != '\t') && ( c != ',')){
	temp[i]=c;
	i++;
	if(i > MAX_BUFFER){ canvas_error("string size too big...will cut it off");break;}
    }
    if( ( c == '\n' || c == EOF) && last == 0){canvas_error("expecting more arguments in command");}
    if( c == '\n' || c == '\t' ) { line_number++; }
    if( c == EOF ) {finished = 1;}
    if( finished == 1 && last == 0 ){ canvas_error("expected more arguments");}
    temp[i]='\0';
/*
    17.10.2014 removed (question Perrin)
    may cause some unwanted effects...
    if( strlen(temp) == 0 ){ canvas_error("expected a word or string (without comma), but found nothing !!");}
*/
    string=(char *)my_newmem(sizeof(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    done = TRUE;
    return string;
}

double get_real(FILE *infile, int last){ /* accept anything that looks like an number ?  last = 0: more arguments ; last=1 final argument */
    int c,i=0,found_calc = 0;
    double y;
    char tmp[MAX_INT];
    /*
     these things are 'allowed functions': *,^,+,-,/,(,),e,arc,cos,tan,pi,log,ln,sqrt,abs
     but there should be a better way to avoid segfaults !
    */
    const char *allowed = "earcostanpilogqb*+-/^()";/* assuming these are allowed stuff in a 'number'*/
    const char *not_allowed = "#dfhjkmuvwxyz{}[]%&~!$";/* avoid segmentation faults in a "atof()" and "wims eval" */
    while(( (c=getc(infile)) != EOF ) && ( c != ',') && (c != '\n') && (c != '\t') && ( c != ';')){
     if( c != ' ' ){
      if( i == 0 &&  c == '+' ){
       continue;
      }
      else
      {
       c = tolower(c);
       if( strchr(not_allowed,c) != 0 ){canvas_error("found a character not associated with a number...");}
       if( strchr(allowed,c) != 0 ){found_calc = 1;}/* hand the string over to wims eval() */
       tmp[i] = c;
       i++;
      }
     }
     if( i > MAX_INT - 1){canvas_error("number too large");}
    }
    if( ( c == '\n' || c == EOF || c == ';' || c == '\t' ) && last == 0){canvas_error("expecting more arguments in command");}
    if( c == '\n' || c == ';' || c == '\t' ){ done = TRUE; line_number++; }
    if( c == EOF ){done = TRUE ; finished = 1;}
    tmp[i]='\0';
    if( strlen(tmp) == 0 ){canvas_error("expected a number, but found nothing !!");}
    if( found_calc == 1 ){ /* use wims eval to calculate 2*pi/3 */
     void *f = eval_create(tmp);
     assert(f);if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
     y = eval_x(f, 1);
     /* if function is bogus; y = 1: so no core dumps */
     eval_destroy(f);
    }
    else
    {
     y = atof(tmp);
    }
    return y;
}


void canvas_error(char *msg){
    fprintf(stdout,"\n</script><hr><span style=\"color:red\">FATAL syntax error: line %d: %s</span><hr>",line_number,msg);
    finished = 1;
    exit(EXIT_SUCCESS);
}


/* convert x/y coordinates to pixel */
int x2px(double x){
 return x*xsize/(xmax - xmin) -  xsize*xmin/(xmax - xmin);
}

int y2px(double y){
 return -1*y*ysize/(ymax - ymin) + ymax*ysize/(ymax - ymin);
}

double px2x(int x){
 return (x*(xmax - xmin)/xsize + xmin);
}
double px2y(int y){
 return (y*(ymax - ymin)/ysize + ymin);
}

void add_to_buffer(char *tmp){
//fprintf(stdout,"tmp = %s<br>buffer = %s<br>",tmp,buffer);
 if( tmp == NULL || tmp == 0 ){ canvas_error("nothing to add_to_buffer()...");}
 /*  do we have enough space left in buffer[MAX_BUFFER] ? */
 int space_left = (int) (sizeof(buffer) - strlen(buffer));
 if( space_left > strlen(tmp)){
  strncat(buffer,tmp,space_left - 1);/* add safely "tmp" to the string buffer */
 }
 else
 {
  canvas_error("your memory buffer is too big<br>simplify your script...it produces too many lines ");
 }
 tmp = NULL;free(tmp);
 return;
}

void reset(){
 if(no_reset == FALSE){ /* 8/5/2020 */
  use_filled = FALSE;
  use_dashed = FALSE;
  if(onclick != 4 ){onclick = 0;} /* slider param 'active'... onclick=4 */
  drag_type = -1;
  use_offset = 0;
 }
}

char *getMML(char *tex){
 int my_pipe[2];pid_t pid;
 if(pipe(my_pipe)){canvas_error("mathml(): pipe() failure.\n");}
  pid = fork();
  if (pid == (pid_t) 0){
   char *argv[]={"wims_mathml","--use-zoom","0","--tex-size 100%","--max-mml-size","1024","--tex-string",tex,NULL};
   close(my_pipe[0]);dup2(my_pipe[1], 1);dup2(my_pipe[1], 2);close(my_pipe[1]);
   execv("../bin/wims_mathml",argv);canvas_error("could not execute wims_mathml\n");
  }
  else
  {
  if (pid < (pid_t) 0){
   close(my_pipe[0]);close(my_pipe[1]);canvas_error("mathml(): fork() failure.\n");
  }
  int status;FILE *stream;close(my_pipe[1]);stream = fdopen (my_pipe[0], "r");
  char buffer[MAX_BUFFER+1];memset(buffer,'\0',MAX_BUFFER);
  fgets(buffer, MAX_BUFFER, stream);
  int L0 = 1 + snprintf(NULL,0,"%s", buffer);
  tex = my_newmem(L0);memset(tex,'\0',L0);
  snprintf(tex,L0,"%s",buffer);
  fclose (stream);close(my_pipe[0]);waitpid(pid, &status, 0);
 }
 return tex;
}

char *getSVGMOL(char *inputtype,char *keys){
  int idx;
  char *forbidden[] = {"-O","-H","-z","-L","-o","-m"};
  char *argv[1+strlen(keys)];
  argv[0] = "obabel"; argv[1] = "-i"; argv[2] = inputtype;
  idx = 3;int i;
  char *ptr = strtok(keys,",");
  while(ptr != NULL ){
    for(i = 0 ; i < 6; i++ ){if( strncmp(ptr,forbidden[i],2) == 0 ){return "NOT ALLOWED ARGUMENT";}}
    argv[idx] = ptr; idx++;
    if(idx > 18){canvas_error("too many arguments for obabel....see docs<br>");}
    ptr = strtok(NULL,",");
  }
  /* last arguments; no 'javascript', only 'svg to STDOUT' and 'NULL' */
  argv[idx] = "-xj";argv[idx+1] = "-o"; argv[idx+2] = "svg";argv[idx+3] = NULL;
  int link[2];
  pid_t pid;
  char buffer[MAX_BUFFER+1];
  memset(buffer,'\0',MAX_BUFFER);
  if (pipe(link)==-1){canvas_error("pipe");}
  if ((pid = fork()) == -1){canvas_error("fork");}

  char *svgmol = "error";
  int string_length = 0;

  if(pid == 0) {
    dup2 (link[1], STDOUT_FILENO);
    dup2(link[0],  STDERR_FILENO);/* remove annoying messages '1 molecule converted' */
    close(link[0]);
    close(link[1]);
    execvp("obabel",argv);
  } else {
    close(link[1]);
    read(link[0],buffer, sizeof(buffer));
    close(link[0]);
    /* need to remover newline from svg-string on freebsd */
    char *pch = strstr(buffer, "\n");
    while(pch != NULL){
     strncpy(pch, " ", 1);
     pch = strstr(buffer, "\n");
    }
    string_length = 1 + snprintf(NULL,0,"%s",buffer);
    svgmol= my_newmem(string_length);
    snprintf(svgmol,string_length,"%s",buffer);
    wait(NULL);
  }
 return svgmol;
}


/* GNU libmatheval library for evaluating mathematical functions. */
char *eval(int xsize,int ysize,char *fun,double xmin,double xmax,double ymin,double ymax,int plotsteps,int precision,double rotationcenter[]){
    void *f;
    double x;
    double y;
    double xorg;
    int xv;
    int i = 0;
    int xstep =(int)(xsize/plotsteps);
    if( xstep == 0 ){xstep = 1;}
    double a = (xmax - xmin)/xsize;
    f = eval_create(fun);
    assert (f);
    if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
    /* we supply the true x/y values...draw_curve() will convert these (x:y) to pixels : used for pan/scale */
    double xydata[MAX_BUFFER+1];/* hmmm */
    int lim_ymin =(int)( ymin - 4*fabs(ymin));/* 19-4-2015 replacing "abs" by "fabs"*/
    int lim_ymax =(int)( ymax + 4*fabs(ymax));/* 19-4-2015 replacing "abs" by "fabs"*/
    double c = 1.0;double s = 1.0;
    if( use_rotate == TRUE ){s = sin(angle*0.0174533);c = cos(angle*0.0174533);}
    for ( xv = 0 ;xv < xsize ; xv = xv+xstep ){
	x = (double) (xv*a + xmin);
	xorg = x;
	if( i < MAX_BUFFER - 2){
	    y = eval_x(f, x);
	    if(y < lim_ymax && y > lim_ymin ){
		if( use_affine == TRUE ){
		    x = x*affine_matrix[0] + y*affine_matrix[1]+affine_matrix[4];
		    y = xorg*affine_matrix[2] + y*affine_matrix[3]+affine_matrix[5];
		}
		if( use_rotate == TRUE){
		  x = (c * (x - rotationcenter[0])) + (s * (y - rotationcenter[1])) + rotationcenter[0];
		  y = (c * (y - rotationcenter[1])) - (s * (xorg - rotationcenter[0])) + rotationcenter[1];
		}
		xydata[i++] = x;
	    	xydata[i++] = y;
	    }
	}
	else
	{
	    canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps or some other means to reduce the amount of data... ");
	}
    }
    eval_destroy(f);
    return double_xy2js_array(xydata,i,find_number_of_digits(precision));
}
/* plot a very primitive (!) levelcurve : not to be compared with "flydraw levelcurve" */
char *eval_levelcurve(int xsize,int ysize,char *fun,double xmin,double xmax,double ymin,double ymax,int plotsteps,int precision,double level){
    void *f = eval_create(fun);
    assert (f);
    if( f == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
    double a = (double)((xmax - xmin)/plotsteps);
    double b = (double)((ymax - ymin)/plotsteps);
    double x;double y;double diff;
    double xydata[MAX_BUFFER+1];
    int i = 0;
    ymin = ymin - 1;
    xmin = xmin - 1;
    ymax = ymax + 1;
    xmax = xmax + 1;
    for( x = xmin ;x < xmax ; x = x + a ){
	for ( y = ymin ;y < ymax ; y = y + b ){
	    if( i < MAX_BUFFER - 2){
		diff = level - eval_x_y(f, x,y);
		if(diff < 0.1 && diff > -0.1){
		    xydata[i++] = x;
		    xydata[i++] = y;
		}
	    }
	    else
	    {
		canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps, decrease image size...\nor some other means to reduce the amount of data... ");
	    }
	}
    }
    eval_destroy(f);
    return double_xy2js_array(xydata,i,find_number_of_digits(precision));
}

/* plot parametric function */
char *eval_parametric(int xsize,int ysize,char *fun1,char* fun2,double xmin,double xmax,double ymin,double ymax,
 double tmin,double tmax,int plotsteps,int precision,double rotationcenter[]){
    void *fx;
    void *fy;
    double t;
    int i = 0;
    double tstep = (tmax-tmin)/plotsteps;
    if( tstep == 0 ){canvas_error("zero step for t variable : reduce plotsteps or inrease trange");}
    fx = eval_create(fun1);
    fy = eval_create(fun2);
    assert(fx);
    assert(fy);
    if( fx == NULL || fy == NULL ){canvas_error("I'm having trouble parsing your \"expression\" ") ;}
    /* we supply the true x/y values...draw_curve() will convert these (x:y) to pixels : used for pan/scale */
    double xydata[MAX_BUFFER+1];/* hmmm */
    double x; /* real x-values */
    double y; /* real y-values */
    double xorg;
    /*
    29/12/2020
    disabled to try and synchronise curve+affine behaviour in complex scripts produced by "elec, tool circuit" (BPR)
    int lim_ymin =(int)( ymin - 4*fabs(ymin));
    int lim_ymax =(int)( ymax + 4*fabs(ymax));
    */
    double c = 1.0;double s = 1.0;if( use_rotate == TRUE ){s = sin(angle*0.0174533);c = cos(angle*0.0174533);}
    for( t = tmin ;t <= tmax ; t = t + tstep ){
	if( i < MAX_BUFFER - 2 ){
	    y = eval_t(fy, t);
	/*    if(y > lim_ymin && y < lim_ymax){*/
		x = eval_t(fx, t);
		if( x == x){ /* no NaN */
		 xorg = x;
		 if( use_affine == TRUE ){
		  x = x*affine_matrix[0] + y*affine_matrix[1]+affine_matrix[4];
		  y = xorg*affine_matrix[2] + y*affine_matrix[3]+affine_matrix[5];
		 }
		 if( use_rotate == TRUE){
		   x = (c * (x - rotationcenter[0])) + (s * (y - rotationcenter[1])) + rotationcenter[0];
		   y = (c * (y - rotationcenter[1])) - (s * (xorg - rotationcenter[0])) + rotationcenter[1];
		 }
		 xydata[i++] = x;
		 xydata[i++] = y;
		}

	/*    } */
	}
	else
	{
	    canvas_error("\nYour curve plotting produces too many data \n Use less plotsteps or some other means to reduce the amount of data... ");
	}
    }
    eval_destroy(fx);
    eval_destroy(fy);
    return double_xy2js_array(xydata,i,find_number_of_digits(precision));
}

char *double_xy2js_array(double xy[],int len,int decimals){
 /*
    1,2,3,4,5,6,7,8 --> [1,3,5,7],[2,4,6,8]
    int xy[] is already checked for errors or overflow in "get_real()"
    just to be sure we double check the size of "temp"
*/
    char temp[2*MAX_BUFFER], *string;
    char *tmp = my_newmem(16);/* <= 9999999999999999  */
    memset(temp,'\0',2*MAX_BUFFER);/* clear memory */
    int i;int space_left;
    temp[0] = '[';/* start js-array */
    for(i = 0; i < len;i = i + 2){ /*  x_points[] */
	if(i == len - 2){sprintf(tmp, "%.*f",decimals, xy[i]);}else{sprintf(tmp, "%.*f,",decimals,xy[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce your image size or plotsteps ");}
    }
    strncat(temp,"],[",4); /* close js x_values array and start new */
    for(i = 1; i < len;i = i + 2){ /* y_points */
	if(i == len - 1){ sprintf(tmp, "%.*f",decimals,xy[i]);}else{sprintf(tmp, "%.*f,",decimals,xy[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce your image size or plotsteps");}
    }
    strncat(temp,"]",2);
    string=(char *)my_newmem(sizeof(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    return string;
}

char *list2js_array(char *list, char *s){/* abc:defg:hjiuy:qwer --> ["abc","defg","hjiuy","qwer"] */
#define MAX_ARG 128
 if( strlen(list)> MAX_ARG - 1){canvas_error("argument is too large (&gt; 128)");}
 char tmp[MAX_ARG];
 size_t p = 0;
 tmp[0] = '[';
 tmp[1] = '\"';
 size_t t = 2;
 while(list[p] != '\0'){
  if( list[p] == s[0] ){
   tmp[t++]='\"';tmp[t++]=',';tmp[t++]='\"';
  }
  else
  {
   tmp[t++] = list[p];
  }
  p++;
 }
 tmp[t++]='\"';tmp[t++]=']';tmp[t++]= '\0';
 char *js_array = (char *)my_newmem(sizeof(tmp));
 snprintf(js_array,sizeof(tmp),"%s",tmp);
 return js_array;
}

char *xy2js_array(int xy[],int len){
 /*
    1,2,3,4,5,6,7,8 --> [1,3,5,7],[2,4,6,8]
    int xy[] is already checked for errors or overflow in "get_real()"
    just to be sure we double check the size of "temp"
*/
    char temp[MAX_BUFFER], *string;
    char *tmp = my_newmem(16);/* <= 9999999999999999  */
    memset(temp,'\0',MAX_BUFFER);/* clear memory */
    int i;int space_left;
    temp[0] = '[';/* start js-array */
    for(i = 0; i < len;i = i + 2){ /*  x_points[] */
	if(i == len - 2){sprintf(tmp, "%d", xy[i]);}else{sprintf(tmp, "%d,", xy[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");}
    }
    strncat(temp,"],[",4); /* close js x_values array and start new */
    for(i = 1; i < len;i = i + 2){ /* y_points */
	if(i == len - 1){ sprintf(tmp, "%d", xy[i]);}else{sprintf(tmp, "%d,", xy[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data\nreduce image size or plotsteps \n");}
    }
    strncat(temp,"]",2);
    string=(char *)my_newmem(sizeof(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    return string;
}

char *data2js_array(int data[],int len){
 /*
    1,2,3,4,5,6,7,8 --> [1,2,3,4,5,6,7,8]
    int data[] is already checked for errors or overflow in "get_real()"
    just to be sure we double check the size of "temp"
*/
    char temp[MAX_BUFFER], *string;
    char *tmp = my_newmem(16);/* <= 9999999999999999  */
    memset(temp,'\0',MAX_BUFFER);/* clear memory */
    int i;int space_left;
    temp[0] = '[';/* start js-array */
    for(i = 0; i < len; i++){
	if(i == len - 1){sprintf(tmp, "%d", data[i]);}else{sprintf(tmp, "%d,", data[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");}
    }
    strncat(temp,"]",2);
    string=(char *)my_newmem(sizeof(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    return string;
}

char *doubledata2js_array(double data[],int len, int decimals){
 /*
    1.4355,2.345353,3.3455 --> [1.44,2.35,3.35]
    double data[] is already checked for errors or overflow in "get_real()"
    just to be sure we double check the size of "temp"
*/
    char temp[MAX_BUFFER], *string;
    char *tmp = my_newmem(16);/* <= 9999999999999999  */
    memset(temp,'\0',MAX_BUFFER);/* clear memory */
    int i;int space_left;
    temp[0] = '[';/* start js-array */
    for(i = 0; i < len; i++){
	if(i == len - 1){sprintf(tmp, "%.*f",decimals,data[i]);}else{sprintf(tmp, "%.*f,",decimals,data[i]);}
	space_left = (int) (sizeof(temp) - strlen(temp) - strlen(tmp) - 1);
	if( space_left > 0 ){ strncat(temp,tmp,space_left - 1);}else{canvas_error("can not parse integer to js-array:\nYour curve plotting produces too many data \nreduce image size or plotsteps ");}
    }
    strncat(temp,"]",2);
    string=(char *)my_newmem(sizeof(temp));
    snprintf(string,sizeof(temp),"%s",temp);
    return string;
}


void *my_newmem(size_t size){
 void	*p;
 if((p = malloc(size +1)) == NULL){canvas_error("canvasdraw: ran out of memory\n");}
 return p;
}

int find_number_of_digits(int i){
 if(i < 0 ){ i = -1*i;}
 int digits = 0;
 while ( i > 0){
  digits++;
  i = i/10;
 }
 return digits;
}

int count_substring(char* string, char* substring) {
  int i, j, l1, l2;
  int count = 0;
  l1 = strlen(string);
  l2 = strlen(substring);
  for(i = 0; i < l1 - l2 + 1; i++) {
    if(strstr(string + i, substring) == string + i) {
      count++;
      i = i + l2 -1;
    }
  }
  return count;
}



void check_string_length(int L){
 if( L > MAX_BUFFER-1){
  canvas_error("problem with your arguments to command...");
 }
 return;
}

int get_token(FILE *infile){
	int     c,i=0;
	char    temp[MAX_INT], *input_type;
	char	*line="line",
	*audio="audio",
	*blink="blink",
	*arrowhead="arrowhead",
	*crosshairsize="crosshairsize",
	*crosshair="crosshair",
	*crosshairs="crosshairs",
	*audioobject="audioobject",
	*style="style",
	*mouse="mouse",
	*mousex="mousex",
	*mousey="mousey",
	*mouse_display="display",
	*mouse_degree="mouse_degree",
	*userdraw="userdraw",
	*highlight="highlight",
	*http="http",
	*rays="rays",
	*dashtype="dashtype",
	*dashed="dashed",
	*filled="filled",
	*lattice="lattice",
	*parallel="parallel",
	*segment="segment",
	*segments="segments",
	*dsegment="dsegment",
	*dsegments="dsegments",
	*seg="seg",
	*segs="segs",
	*bgimage="bgimage",
	*bgcolor="bgcolor",
	*strokecolor="strokecolor",
	*backgroundimage="backgroundimage",
	*text="text",
	*textup="textup",
	*mouseprecision="mouseprecision",
	*precision="precision",
	*plotsteps="plotsteps",
	*plotstep="plotstep",
	*tsteps="tsteps",
	*curve="curve",
	*dcurve="dcurve",
	*curvedarrow="curvedarrow",
	*curvedarrows="curvedarrows",
	*curvedarrow2="curvedarrow2",
	*curvedarrows2="curvedarrows2",
	*plot="plot",
	*dplot="dplot",
	*levelcurve="levelcurve",
	*fontsize="fontsize",
	*fontcolor="fontcolor",
	*axis="axis",
	*axisnumbering="axisnumbering",
	*axisnumbers="axisnumbers",
	*arrow="arrow",
	*vector="vector",
	*vectors="vectors",
	*darrow="darrow",
	*arrow2="arrow2",
	*darrow2="darrow2",
	*arrows="arrows",
	*arrows2="arrows2",
	*zoom="zoom",
	*grid="grid",
	*hline="hline",
	*dhline="dhline",
	*drag="drag",
	*horizontalline="horizontalline",
	*horizontallines="horizontallines",
	*vline="vline",
	*dvline="dvline",
	*verticalline="verticalline",
	*verticallines="verticallines",
	*triangle="triangle",
	*triangles="triangles",
	*ftriangle="ftriangle",
	*ftriangles="ftriangles",
	*mathml="mathml",
	*html="html",
	*input="input",
	*clearbutton="clearbutton",
	*erase="erase",
	*delete="delete",
	*css="css",
	*textarea="textarea",
	*range="range",
	*trange="trange",
	*ranget="ranget",
	*xrange="xrange",
	*yrange="yrange",
	*rangex="rangex",
	*rangey="rangey",
	*path="path",
	*polyline="polyline",
	*dpolyline="dpolyline",
	*brokenline="brokenline",
	*lines="lines",
	*poly="poly",
	*polygon="polygon",
	*fpolygon="fpolygon",
	*fpoly="fpoly",
	*filledpoly="filledpoly",
	*filledpolygon="filledpolygon",
	*rect="rect",
	*frect="frect",
	*rectangle="rectangle",
	*frectangle="frectangle",
	*square="square",
	*fsquare="fsquare",
	*fsquares="fsquares",
	*rects="rects",
	*frects="frects",
	*dline="dline",
	*arc="arc",
	*filledarc="filledarc",
	*farc="farc",
	*size="size",
	*string="string",
	*stringup="stringup",
	*copy="copy",
	*copyresized="copyresized",
	*opacity="opacity",
	*transparent="transparent",
	*fill="fill",
	*point="point",
	*points="points",
	*linewidth="linewidth",
	*circle="circle",
	*circles="circles",
	*fcircle="fcircle",
	*fcircles="fcircles",
	*disk="disk",
	*disks="disks",
	*comment="#",
	*end="end",
	*ellipse="ellipse",
	*ellipses="ellipses",
	*fellipse="fellipse",
	*rotate="rotate",
	*affine="affine",
	*rotationcenter="rotationcenter",
	*kill="kill",
	*killrotate="killrotate",
	*killaffine="killaffine",
	*killlinear="killlinear",
	*killinear="killinear",
	*fontfamily="fontfamily",
	*fillcolor="fillcolor",
	*clicktile="clicktile",
	*clicktile_colors="clicktile_colors",
	*translation="translation",
	*translate="translate",
	*killtranslation="killtranslation",
	*killtranslate="killtranslate",
	*onclick="onclick",
	*roundrects="roundrects",
	*roundrect="roundrect",
	*froundrect="froundrect",
	*froundrects="froundrects",
	*roundrectangle="roundrectangle",
	*patternfill="patternfill",
	*hatchfill="hatchfill",
	*diafill="diafill",
	*diamondfill="diamondfill",
	*dotfill="dotfill",
	*textfill="textfill",
	*gridfill="gridfill",
	*imagefill="imagefill",
	*xlogbase="xlogbase",
	*ylogbase="ylogbase",
	*xlogscale="xlogscale",
	*ylogscale="ylogscale",
	*xylogscale="xylogscale",
	*intooltip="intooltip",
	*popup="popup",
	*replyformat="replyformat",
	*floodfill="floodfill",
	*fillall="fillall",
	*filltoborder="filltoborder",
	*setpixel="setpixel",
	*pixels="pixels",
	*pixelsize="pixelsize",
	*xaxis="xaxis",
	*xaxisup="xaxisup",
	*yaxis="yaxis",
	*xaxistext="xaxistext",
	*xaxistextup="xaxistextup",
	*yaxistext="yaxistext",
	*piechart="piechart",
	*boxplot="boxplot",
	*boxplotdata="boxplotdata",
	*userboxplot="userboxplot",
	*userboxplotdata="userboxplotdata",
	*legend="legend",
	*legendcolors="legendcolors",
	*xlabel="xlabel",
	*ylabel="ylabel",
	*barchart="barchart",
	*linegraph="linegraph",
	*clock="clock",
	*animate="animate",
	*video="video",
	*status="status",
	*nostatus="nostatus",
	*snaptogrid="snaptogrid",
	*xsnaptogrid="xsnaptogrid",
	*ysnaptogrid="ysnaptogrid",
	*snaptopoints="snaptopoints",
	*snaptofunction="snaptofunction",
	*snaptofun="snaptofun",
	*userinput_xy="userinput_xy",
	*userinput_function="userinput_function",
	*userinput="userinput",
	*jsmath="jsmath",
	*trace_jscurve="trace_jscurve",
	*setlimits="setlimits",
	*jscurve="jscurve",
	*jsplot="jsplot",
	*sgraph="sgraph",
	*title="title",
	*centerstring="centerstring",
	*xunit="xunit",
	*yunit="yunit",
	*slider="slider",
	*killslider="killslider",
	*killgroup="killgroup",
	*angle="angle",
	*halflines="halflines",
	*demilines="demilines",
	*halfline="halfline",
	*demiline="demiline",
	*hlines="hlines",
	*vlines="vlines",
	*bezier="bezier",
	*functionlabel="functionlabel",
	*functionlabels="functionlabels",
	*group="group",
	*multidraw="multidraw",
	*multilinewidth="multilinewidth",
	*linewidths="linewidths",
	*multistrokecolors="multistrokecolors",
	*multicolors="multicolors",
	*strokecolors="strokecolors",
	*colors="colors",
	*multifillcolors="multifillcolors",
	*fillcolors="fillcolors",
	*multistrokeopacity="multistrokeopacity",
	*multifillopacity="multifillopacity",
	*multifill="multifill",
	*multidash="multidash",
	*multilabel="multilabel",
	*multiuserinput="multiuserinput",
	*multiinput="multiinput",
	*multisnaptogrid="multisnaptogrid",
	*multisnap="multisnap",
	*protractor="protractor",
	*ruler="ruler",
	*cursor="cursor",
	*pointer="pointer",
	*yerrorbars="yerrorbars",
	*xerrorbars="xerrorbars",
	*noxaxis="noxaxis",
	*noyaxis="noyaxis",
	*colorpalette="colorpalette",
	*imagepalette="imagepalette",
	*yoffset="yoffset",
	*xoffset="xoffset",
	*latex="latex",
	*katex="katex",
	*math="math",
	*centered="centered",
	*xyoffset="xyoffset",
	*resetoffset="resetoffset",
	*fillpattern="fillpattern",
	*settile="settile",
	*numberline="numberline",
	*duplicates="duplicates",
	*allowdups="allowdups",
	*linear="linear",
	*obabel="obabel",
	*chemtex="chemtex",
	*reset="reset",
	*noreset="noreset",
	*killreset="killreset",
	*arrowarc="arrowarc",
	*arcarrow="arcarrow",
	*newrange="newrange",
	*canvastype="canvastype";

	while(((c = getc(infile)) != EOF)&&(c!='\n')&&(c!=',')&&(c!='=')&&(c!='\r')&&(c!='\t')){
	 if( i == 0 && (c == ' ') ){ continue; /* white spaces or tabs allowed before first command identifier */
	 }else{
	  if( c == ' ' ){
	    break;
	  }else{
	   temp[i] = c;
	   if(i > MAX_INT - 2){canvas_error("command string too long !");}
	   i++;
	  }
	 }
	 if(temp[0] == '#'){ break; }
	}
	if (c == '\n' || c == '\r' || c == '\t' ){  line_number++; }
	if (c == EOF) {finished=1;return 0;}

	temp[i]='\0';
	if(strstr(temp,"dash") !=0 && strlen(temp) > 4 && strstr(temp,"dashtype") == 0 ){
	/* 4/2024 adapt to Flydraw's dashing syntax for all objects with prefix "dash" */
	    use_dashed = TRUE;int idx=0;int p;
	    for( p = 4; p < strlen(temp); p++){temp[idx] = temp[p];idx++;}
	    input_type = (char*)my_newmem(idx); snprintf(input_type,idx+1,"%s",temp);
	}else{
	    input_type=(char*)my_newmem(strlen(temp));
	    snprintf(input_type,sizeof(temp),"%s",temp);
	}
/*	fprintf(stdout,"input_type = %s no_reset = %d <br/>",input_type,no_reset);*/
	if( strcmp(input_type, size) == 0 ){
	free(input_type);
	return SIZE;
	}
	if( strcmp(input_type, range) == 0 ){
	free(input_type);
	return RANGE;
	}
	if( strcmp(input_type, xrange) == 0 ){
	free(input_type);
	return XRANGE;
	}
	if( strcmp(input_type, rangex) == 0 ){
	free(input_type);
	return XRANGE;
	}
	if( strcmp(input_type, trange) == 0 ){
	free(input_type);
	return TRANGE;
	}
	if( strcmp(input_type, ranget) == 0 ){
	free(input_type);
	return TRANGE;
	}
	if( strcmp(input_type, newrange) == 0 ){
	free(input_type);
	return NEWRANGE;
	}
	if( strcmp(input_type, yrange) == 0 ){
	free(input_type);
	return YRANGE;
	}
	if( strcmp(input_type, rangey) == 0 ){
	free(input_type);
	return YRANGE;
	}
	if( strcmp(input_type, linewidth) == 0 ){
	free(input_type);
	return LINEWIDTH;
	}
	if( strcmp(input_type, dashed) == 0 ){
	free(input_type);
	return DASHED;
	}
	if( strcmp(input_type, dashtype) == 0 ){
	free(input_type);
	return DASHTYPE;
	}
	if( strcmp(input_type, axisnumbering) == 0 ){
	free(input_type);
	return AXIS_NUMBERING;
	}
	if( strcmp(input_type, axisnumbers) == 0 ){
	free(input_type);
	return AXIS_NUMBERING;
	}
	if( strcmp(input_type, axis) == 0 ){
	free(input_type);
	return AXIS;
	}
	if( strcmp(input_type, grid) == 0 ){
	free(input_type);
	return GRID;
	}
	if( strcmp(input_type, hlines) == 0 || strcmp(input_type, horizontallines) == 0 ){
	free(input_type);
	return HLINES;
	}
	if( strcmp(input_type, vlines) == 0 ||  strcmp(input_type, verticallines) == 0 ){
	free(input_type);
	return VLINES;
	}
	if( strcmp(input_type, hline) == 0 || strcmp(input_type, horizontalline) == 0 ){
	free(input_type);
	return HLINE;
	}
	if( strcmp(input_type, vline) == 0 ||  strcmp(input_type, verticalline) == 0 ){
	free(input_type);
	return VLINE;
	}
	if( strcmp(input_type, line) == 0 ){
	free(input_type);
	return LINE;
	}
	if( strcmp(input_type, segments) == 0 || strcmp(input_type, segs) == 0 ){
	free(input_type);
	return SEGMENTS;
	}
	if( strcmp(input_type, seg) == 0 ||  strcmp(input_type, segment) == 0 ){
	free(input_type);
	return SEGMENT;
	}
	if( strcmp(input_type, dsegments) == 0 ){
	free(input_type);
	use_dashed = TRUE;
	return SEGMENTS;
	}
	if( strcmp(input_type, dsegment) == 0 ){
	free(input_type);
	use_dashed = TRUE;
	return SEGMENT;
	}
	if( strcmp(input_type, crosshairsize) == 0 ){
	free(input_type);
	return CROSSHAIRSIZE;
	}
	if( strcmp(input_type, arrowhead) == 0 ){
	free(input_type);
	return ARROWHEAD;
	}
	if( strcmp(input_type, crosshairs) == 0 ){
	free(input_type);
	return CROSSHAIRS;
	}
	if( strcmp(input_type, crosshair) == 0 ){
	free(input_type);
	return CROSSHAIR;
	}
	if( strcmp(input_type, onclick) == 0 ){
	free(input_type);
	return ONCLICK;
	}
	if( strcmp(input_type, drag) == 0 ){
	free(input_type);
	return DRAG;
	}
	if( strcmp(input_type, userdraw) == 0 ){
	free(input_type);
	return USERDRAW;
	}
	if( strcmp(input_type, highlight) == 0 || strcmp(input_type, style) == 0 ){
	free(input_type);
	return STYLE;
	}
	if( strcmp(input_type, fillcolor) == 0 ){
	free(input_type);
	return FILLCOLOR;
	}
	if( strcmp(input_type, strokecolor) == 0 ){
	free(input_type);
	return STROKECOLOR;
	}
	if( strcmp(input_type, filled) == 0  ){
	free(input_type);
	return FILLED;
	}
	if( strcmp(input_type, http) == 0 ){
	free(input_type);
	return HTTP;
	}
	if( strcmp(input_type, rays) == 0 ){
	free(input_type);
	return RAYS;
	}
	if( strcmp(input_type, lattice) == 0 ){
	free(input_type);
	return LATTICE;
	}
	if( strcmp(input_type, bgimage) == 0 ){
	free(input_type);
	return BGIMAGE;
	}
	if( strcmp(input_type, bgcolor) == 0 ){
	free(input_type);
	return BGCOLOR;
	}
	if( strcmp(input_type, backgroundimage) == 0 ){
	free(input_type);
	return BGIMAGE;
	}
	if( strcmp(input_type, text) == 0 ){
	free(input_type);
	return FLY_TEXT;
	}
	if( strcmp(input_type, textup) == 0 ){
	free(input_type);
	return FLY_TEXTUP;
	}
	if( strcmp(input_type, mouse) == 0 ){
	free(input_type);
	return MOUSE;
	}
	if( strcmp(input_type, mousex) == 0 ){
	free(input_type);
	return MOUSEX;
	}
	if( strcmp(input_type, mousey) == 0 ){
	free(input_type);
	return MOUSEY;
	}
	if( strcmp(input_type, mouse_degree) == 0 ){
	free(input_type);
	return MOUSE_DEGREE;
	}
	if( strcmp(input_type, mouse_display) == 0 ){
	free(input_type);
	return MOUSE_DISPLAY;
	}
	if( strcmp(input_type, mouseprecision) == 0 ){
	free(input_type);
	return MOUSE_PRECISION;
	}
	if( strcmp(input_type, precision) == 0 ){
	free(input_type);
	return MOUSE_PRECISION;
	}
	if( strcmp(input_type, curve) == 0 ){
	free(input_type);
	return CURVE;
	}
	if( strcmp(input_type, dcurve) == 0 ){
	use_dashed = TRUE;
	free(input_type);
	return CURVE;
	}
	if( strcmp(input_type, plot) == 0 ){
	free(input_type);
	return CURVE;
	}
	if( strcmp(input_type, dplot) == 0 ){
	use_dashed = TRUE;
	free(input_type);
	return CURVE;
	}
	if( strcmp(input_type, levelcurve) == 0 ){
	free(input_type);
	return LEVELCURVE;
	}
	if( strcmp(input_type, plotsteps) == 0 ){
	free(input_type);
	return PLOTSTEPS;
	}
	if( strcmp(input_type, plotstep) == 0 ){
	free(input_type);
	return PLOTSTEPS;
	}
	if( strcmp(input_type, tsteps) == 0 ){
	free(input_type);
	return PLOTSTEPS;
	}
	if( strcmp(input_type, fontsize) == 0 ){
	free(input_type);
	return FONTSIZE;
	}
	if( strcmp(input_type, fontcolor) == 0 ){
	free(input_type);
	return FONTCOLOR;
	}
	if( strcmp(input_type, arrow2) == 0 ){
	free(input_type);
	return ARROW2;
	}
	if( strcmp(input_type, darrow) == 0 ){
	free(input_type);
	use_dashed = TRUE;
	return ARROW;
	}
	if( strcmp(input_type, darrow2) == 0 ){
	free(input_type);
	use_dashed = TRUE;
	return ARROW2;
	}
	if( strcmp(input_type, arrows2) == 0 ){
	free(input_type);
	return ARROWS2;
	}
	if( strcmp(input_type, arrows) == 0  || strcmp(input_type, vectors) == 0 ){
	free(input_type);
	return ARROWS;
	}
	if( strcmp(input_type, arrow) == 0 ||  strcmp(input_type, vector) == 0 ){
	free(input_type);
	return ARROW;
	}
	if( strcmp(input_type, zoom) == 0 ){
	free(input_type);
	return ZOOM;
	}
	if( strcmp(input_type, triangle) == 0 ){
	free(input_type);
	return TRIANGLE;
	}
	if( strcmp(input_type, triangles) == 0 ){
	free(input_type);
	return TRIANGLES;
	}
	if( strcmp(input_type, ftriangles) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return TRIANGLES;
	}
	if( strcmp(input_type, ftriangle) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return TRIANGLE;
	}
	if( strcmp(input_type, input) == 0 ){
	free(input_type);
	return INPUT;
	}
	if( strcmp(input_type, css) == 0 ){
	free(input_type);
	return CSS;
	}
	if( strcmp(input_type, textarea) == 0 ){
	free(input_type);
	return TEXTAREA;
	}
	if( strcmp(input_type, mathml) == 0 ){
	free(input_type);
	return MATHML;
	}
	if( strcmp(input_type, html) == 0 ){
	free(input_type);
	return HTML;
	}
	if( strcmp(input_type, fontfamily) == 0 ){
	free(input_type);
	return FONTFAMILY;
	}
	if( strcmp(input_type, polyline) == 0 ||  strcmp(input_type, dpolyline) == 0 ||  strcmp(input_type, path) == 0 || strcmp(input_type, brokenline) == 0 ){
	if(strcmp(input_type, dpolyline) == 0 ){use_dashed = TRUE;}
	free(input_type);
	return POLYLINE;
	}
	if( strcmp(input_type, lines) == 0 ){
	free(input_type);
	return LINES;
	}
	if( strcmp(input_type, rects) == 0){
	free(input_type);
	return RECTS;
	}
	if( strcmp(input_type, frects) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return RECTS;
	}
	if( strcmp(input_type, rect) == 0  ||  strcmp(input_type, rectangle) == 0 ){
	free(input_type);
	return RECT;
	}
	if( strcmp(input_type, square) == 0 ){
	free(input_type);
	return SQUARE;
	}
	if( strcmp(input_type, fsquare) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return SQUARE;
	}
	if( strcmp(input_type, fsquares) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return RECTS;
	}
	if( strcmp(input_type, roundrects) == 0 ){
	free(input_type);
	return ROUNDRECTS;
	}
	if( strcmp(input_type, roundrect) == 0  ||  strcmp(input_type, roundrectangle) == 0 ){
	free(input_type);
	return ROUNDRECT;
	}
	if( strcmp(input_type, froundrects) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return ROUNDRECTS;
	}
	if( strcmp(input_type, froundrect) == 0 ){
	free(input_type);
	use_filled = TRUE;
	return ROUNDRECT;
	}
	if( strcmp(input_type, dline) == 0 ){
	use_dashed = TRUE;
	free(input_type);
	return LINE;
	}
	if( strcmp(input_type, dvline) == 0 ){
	use_dashed = TRUE;
	free(input_type);
	return VLINE;
	}
	if( strcmp(input_type, dhline) == 0 ){
	use_dashed = TRUE;
	free(input_type);
	return HLINE;
	}
	if( strcmp(input_type, halflines) == 0 || strcmp(input_type, demilines) == 0  ){
	free(input_type);
	return HALFLINES;
	}
	if( strcmp(input_type, halfline) == 0 || strcmp(input_type, demiline) == 0  ){
	free(input_type);
	return HALFLINE;
	}
	if( strcmp(input_type, frect) == 0 || strcmp(input_type, frectangle) == 0 ){
	use_filled = TRUE;
	free(input_type);
	return RECT;
	}
	if( strcmp(input_type, circles) == 0 ){
	free(input_type);
	return CIRCLES;
	}
	if( strcmp(input_type, fcircle) == 0  ||  strcmp(input_type, disk) == 0 ){
	use_filled = TRUE;
	free(input_type);
	return CIRCLE;
	}
	if( strcmp(input_type, fcircles) == 0  ||  strcmp(input_type, disks) == 0 ){
	use_filled = TRUE;
	free(input_type);
	return CIRCLES;
	}
	if( strcmp(input_type, circle) == 0 ){
	free(input_type);
	return CIRCLE;
	}
	if( strcmp(input_type, point) == 0 ){
	free(input_type);
	return POINT;
	}
	if( strcmp(input_type, points) == 0 ){
	free(input_type);
	return POINTS;
	}
	if( strcmp(input_type, filledarc) == 0 || strcmp(input_type, farc) == 0 ){
	use_filled = TRUE;
	free(input_type);
	return ARC;
	}
	if( strcmp(input_type, arc) == 0 ){
	free(input_type);
	return ARC;
	}
	if( strcmp(input_type, poly) == 0 ||  strcmp(input_type, polygon) == 0 ){
	free(input_type);
	return POLY;
	}
	if( strcmp(input_type, fpoly) == 0 ||  strcmp(input_type, filledpoly) == 0 || strcmp(input_type,filledpolygon) == 0  || strcmp(input_type,fpolygon) == 0  ){
	use_filled = TRUE;
	free(input_type);
	return POLY;
	}
	if( strcmp(input_type, ellipse) == 0){
	free(input_type);
	return ELLIPSE;
	}
	if( strcmp(input_type, ellipses) == 0){
	free(input_type);
	return ELLIPSES;
	}
	if( strcmp(input_type, string) == 0 ){
	free(input_type);
	return STRING;
	}
	if( strcmp(input_type, stringup) == 0 ){
	free(input_type);
	return STRINGUP;
	}
	if( strcmp(input_type, opacity) == 0 || strcmp(input_type, transparent) == 0 ){
	free(input_type);
	return OPACITY;
	}
	if( strcmp(input_type, comment) == 0){
	free(input_type);
	return COMMENT;
	}
	if( strcmp(input_type, fellipse) == 0){
	free(input_type);
	use_filled = TRUE;
	return ELLIPSE;
	}
	if( strcmp(input_type, clearbutton) == 0 || strcmp(input_type, erase) == 0 || strcmp(input_type, delete) == 0){
	free(input_type);
	return CLEARBUTTON;
	}
	if( strcmp(input_type, translation) == 0 ||  strcmp(input_type, translate) == 0  ){
	free(input_type);
	return TRANSLATION;
	}
	if( strcmp(input_type, kill) == 0 ){
	free(input_type);
	return KILL;
	}
	if( strcmp(input_type, killtranslation) == 0 ||  strcmp(input_type, killtranslate) == 0){
	free(input_type);
	return KILLTRANSLATION;
	}
	if( strcmp(input_type, rotate) == 0){
	free(input_type);
	return ROTATE;
	}
	if( strcmp(input_type, killrotate) == 0){
	free(input_type);
	return KILLROTATE;
	}
	if( strcmp(input_type, rotationcenter) == 0){
	free(input_type);
	return ROTATION_CENTER;
	}
	if( strcmp(input_type, affine) == 0){
	free(input_type);
	return AFFINE;
	}
	if( strcmp(input_type, linear) == 0){
	free(input_type);
	return LINEAR;
	}
	if( strcmp(input_type, killaffine) == 0){
	free(input_type);
	return KILLAFFINE;
	}
	if( strcmp(input_type, killlinear) == 0 || strcmp(input_type, killinear) == 0  ){
	free(input_type);
	return KILLLINEAR;
	}
	if( strcmp(input_type, slider) == 0 ){
	free(input_type);
	return SLIDER;
	}
	if( strcmp(input_type, killslider) == 0 || strcmp(input_type, killgroup) == 0 ){
	free(input_type);
	return KILLSLIDER;
	}
	if( strcmp(input_type, copy) == 0 ){
	free(input_type);
	return COPY;
	}
	if( strcmp(input_type, copyresized) == 0 ){
	free(input_type);
	return COPYRESIZED;
	}
	if( strcmp(input_type, xlogscale) == 0 ){
	free(input_type);
	return XLOGSCALE;
	}
	if( strcmp(input_type, ylogscale) == 0 ){
	free(input_type);
	return YLOGSCALE;
	}
	if( strcmp(input_type, xylogscale) == 0 ){
	free(input_type);
	return XYLOGSCALE;
	}
	if( strcmp(input_type, ylogscale) == 0 ){
	free(input_type);
	return YLOGSCALE;
	}
	if( strcmp(input_type, xlogbase) == 0 ){
	free(input_type);
	return XLOGBASE;
	}
	if( strcmp(input_type, ylogbase) == 0 ){
	free(input_type);
	return YLOGBASE;
	}
	if( strcmp(input_type, intooltip) == 0 ){
	free(input_type);
	return INTOOLTIP;
	}
	if( strcmp(input_type, popup) == 0 ){
	free(input_type);
	return POPUP;
	}
	if( strcmp(input_type,video) == 0 ){
	free(input_type);
	return VIDEO;
	}
	if( strcmp(input_type,math) == 0 || strcmp(input_type,latex) == 0 ||  strcmp(input_type,katex) == 0 ){
	free(input_type);
	return LATEX;
	}
	if( strcmp(input_type,fillall) == 0 ){
	free(input_type);
	return FILLALL;
	}
	if( strcmp(input_type,floodfill) == 0 || strcmp(input_type,fill) == 0 ){
	free(input_type);
	return FLOODFILL;
	}
	if( strcmp(input_type,filltoborder) == 0 ){
	free(input_type);
	return FILLTOBORDER;
	}
	if( strcmp(input_type, curvedarrow2) == 0 ){
	free(input_type);
	return CURVEDARROW2;
	}
	if( strcmp(input_type, curvedarrow) == 0 ){
	free(input_type);
	return CURVEDARROW;
	}
	if( strcmp(input_type, curvedarrows) == 0 ){
	free(input_type);
	return CURVEDARROWS;
	}
	if( strcmp(input_type, curvedarrows2) == 0 ){
	free(input_type);
	return CURVEDARROWS2;
	}
	if( strcmp(input_type, replyformat) == 0 ){
	free(input_type);
	return REPLYFORMAT;
	}
	if( strcmp(input_type, pixelsize) == 0 ){
	free(input_type);
	return PIXELSIZE;
	}
	if( strcmp(input_type, setpixel) == 0 ){
	free(input_type);
	return SETPIXEL;
	}
	if( strcmp(input_type, pixels) == 0 ){
	free(input_type);
	return PIXELS;
	}
	if( strcmp(input_type, xaxis) == 0 || strcmp(input_type, xaxistext) == 0 ){
	free(input_type);
	return X_AXIS_STRINGS;
	}
	if( strcmp(input_type, xaxisup) == 0 || strcmp(input_type, xaxistextup) == 0 ){
	free(input_type);
	return X_AXIS_STRINGS_UP;
	}
	if( strcmp(input_type, yaxis) == 0  ||  strcmp(input_type, yaxistext) == 0 ){
	free(input_type);
	return Y_AXIS_STRINGS;
	}
	if( strcmp(input_type, legend) == 0  ){
	free(input_type);
	return LEGEND;
	}
	if( strcmp(input_type, legendcolors) == 0  ){
	free(input_type);
	return LEGENDCOLORS;
	}
	if( strcmp(input_type, xlabel) == 0  ){
	free(input_type);
	return XLABEL;
	}
	if( strcmp(input_type, ylabel) == 0  ){
	free(input_type);
	return YLABEL;
	}
	if( strcmp(input_type, bezier) == 0  ){
	free(input_type);
	return BEZIER;
	}
	if( strcmp(input_type, animate) == 0  ){
	free(input_type);
	return ANIMATE;
	}
	/* these are bitmap related flydraw commands...must be removed. eventually */
	if( strcmp(input_type, transparent) == 0 ){
	free(input_type);
	return TRANSPARENT;
	}
	if( strcmp(input_type, status) == 0 || strcmp(input_type, nostatus) == 0 ){
	free(input_type);
	return STATUS;
	}
	if( strcmp(input_type, xsnaptogrid) == 0 ){
	free(input_type);
	return XSNAPTOGRID;
	}
	if( strcmp(input_type, ysnaptogrid) == 0 ){
	free(input_type);
	return YSNAPTOGRID;
	}
	if( strcmp(input_type, snaptogrid) == 0 ){
	free(input_type);
	return SNAPTOGRID;
	}
	if( strcmp(input_type, snaptopoints) == 0 ){
	free(input_type);
	return SNAPTOPOINTS;
	}
	if( strcmp(input_type, snaptofunction) == 0  || strcmp(input_type, snaptofun) == 0 ){
	free(input_type);
	return SNAPTOFUNCTION;
	}
	if( strcmp(input_type, userinput_xy) == 0 ){
	free(input_type);
	return USERINPUT_XY;
	}
	if( strcmp(input_type, userinput_function) == 0 ){
	free(input_type);
	return USERINPUT_FUNCTION;
	}
	if( strcmp(input_type, userinput) == 0 ){
	free(input_type);
	return USERINPUT;
	}
	if( strcmp(input_type, angle) == 0 ){
	free(input_type);
	return ANGLE;
	}
	if( strcmp(input_type, functionlabel) == 0 ||  strcmp(input_type, functionlabels) == 0 ){
	free(input_type);
	return FUNCTION_LABEL;
	}
	if( strcmp(input_type, group) == 0 ){
	free(input_type);
	return GROUP;
	}
	if( strcmp(input_type, multidraw) == 0 ){
	free(input_type);
	return MULTIDRAW;
	}
	if( strcmp(input_type, multistrokeopacity) == 0 ){
	free(input_type);
	return MULTISTROKEOPACITY;
	}
	if( strcmp(input_type, multifillopacity) == 0 ){
	free(input_type);
	return MULTIFILLOPACITY;
	}
	if( strcmp(input_type, multilinewidth) == 0 || strcmp(input_type, linewidths) == 0 ){
	free(input_type);
	return MULTILINEWIDTH;
	}
	if( strcmp(input_type, multistrokecolors) == 0 || strcmp(input_type,multicolors) == 0  || strcmp(input_type,strokecolors) == 0 ||  strcmp(input_type,colors) == 0 ){
	free(input_type);
	return MULTISTROKECOLORS;
	}
	if( strcmp(input_type, multifill) == 0 ){
	free(input_type);
	return MULTIFILL;
	}
	if( strcmp(input_type, multifillcolors) == 0 || strcmp(input_type, fillcolors) == 0  ){
	free(input_type);
	return MULTIFILLCOLORS;
	}
	if( strcmp(input_type, multilabel) == 0 ){
	free(input_type);
	return MULTILABEL;
	}
	if( strcmp(input_type, multidash) == 0 ){
	free(input_type);
	return MULTIDASH;
	}
	if( strcmp(input_type, multisnaptogrid) == 0  ||  strcmp(input_type, multisnap) == 0 ){
	free(input_type);
	return MULTISNAPTOGRID;
	}
	if( strcmp(input_type, multiuserinput) == 0 || strcmp(input_type, multiinput) == 0  ){
	free(input_type);
	return MULTIUSERINPUT;
	}
	if( strcmp(input_type, parallel) == 0 ){
	free(input_type);
	return PARALLEL;
	}
	if( strcmp(input_type, protractor) == 0 ){
	free(input_type);
	return PROTRACTOR;
	}
	if( strcmp(input_type, ruler) == 0 ){
	free(input_type);
	return RULER;
	}
	if( strcmp(input_type, cursor) == 0 ||  strcmp(input_type, pointer) == 0 ){
	free(input_type);
	return CURSOR;
	}
	if( strcmp(input_type, sgraph) == 0 ){
	free(input_type);
	return SGRAPH;
	}
	if( strcmp(input_type, jsmath) == 0 ){
	free(input_type);
	return JSMATH;
	}
	if( strcmp(input_type, trace_jscurve) == 0 ){
	free(input_type);
	return TRACE_JSCURVE;
	}
	if( strcmp(input_type, jscurve) == 0  ||  strcmp(input_type, jsplot) == 0 ){
	free(input_type);
	return JSCURVE;
	}
	if( strcmp(input_type, centerstring) == 0 || strcmp(input_type, title) == 0 ){
	free(input_type);
	return CENTERSTRING;
	}
	if( strcmp(input_type, setlimits) == 0 ){
	free(input_type);
	return SETLIMITS;
	}
	if( strcmp(input_type, xunit) == 0 ){
	free(input_type);
	return XUNIT;
	}
	if( strcmp(input_type, yunit) == 0 ){
	free(input_type);
	return YUNIT;
	}
	if( strcmp(input_type, fill) == 0 ){
	free(input_type);
	return FLOODFILL;
	}
	if( strcmp(input_type, end) == 0){
	free(input_type);
	return END;
	}
	if( strcmp(input_type, blink) == 0 ){
	free(input_type);
	return BLINK;
	}
	if( strcmp(input_type, audio) == 0 ){
	free(input_type);
	return AUDIO;
	}
	if( strcmp(input_type, audioobject) == 0 ){
	free(input_type);
	return AUDIOOBJECT;
	}
	if( strcmp(input_type, patternfill) == 0 ){
	free(input_type);
	return PATTERNFILL;
	}
	if( strcmp(input_type, hatchfill) == 0 ){
	free(input_type);
	return HATCHFILL;
	}
	if( strcmp(input_type, diafill) == 0  || strcmp(input_type, diamondfill) == 0  ){
	free(input_type);
	return DIAMONDFILL;
	}
	if( strcmp(input_type, dotfill) == 0 ){
	free(input_type);
	return DOTFILL;
	}
	if( strcmp(input_type, textfill) == 0 ){
	free(input_type);
	return TEXTFILL;
	}
	if( strcmp(input_type, gridfill) == 0 ){
	free(input_type);
	return GRIDFILL;
	}
	if( strcmp(input_type, imagefill) == 0 ){
	free(input_type);
	return IMAGEFILL;
	}
	if( strcmp(input_type, clicktile_colors) == 0 ){
	free(input_type);
	return CLICKTILE_COLORS;
	}
	if( strcmp(input_type, clicktile) == 0 ){
	free(input_type);
	return CLICKTILE;
	}
	if( strcmp(input_type, piechart) == 0  ){
	free(input_type);
	return PIECHART;
	}
	if( strcmp(input_type, boxplot) == 0  ){
	free(input_type);
	return BOXPLOT;
	}
	if( strcmp(input_type, boxplotdata) == 0  ){
	free(input_type);
	return BOXPLOTDATA;
	}
	if( strcmp(input_type, userboxplot) == 0  ){
	free(input_type);
	return USERBOXPLOT;
	}
	if( strcmp(input_type, userboxplotdata) == 0  ){
	free(input_type);
	return USERBOXPLOT;
	}
	if( strcmp(input_type, barchart) == 0  ){
	free(input_type);
	return BARCHART;
	}
	if( strcmp(input_type, linegraph) == 0  ){
	free(input_type);
	return LINEGRAPH;
	}
	if( strcmp(input_type, clock) == 0  ){
	free(input_type);
	return CLOCK;
	}
	if( strcmp(input_type, yerrorbars) == 0  ){
	free(input_type);
	return YERRORBARS;
	}
	if( strcmp(input_type, xerrorbars) == 0  ){
	free(input_type);
	return XERRORBARS;
	}
	if( strcmp(input_type, canvastype) == 0  ){
	free(input_type);
	return CANVASTYPE;
	}
	if( strcmp(input_type, noyaxis) == 0  ){
	free(input_type);
	return NOYAXIS;
	}
	if( strcmp(input_type, noxaxis) == 0  ){
	free(input_type);
	return NOXAXIS;
	}
	if( strcmp(input_type, colorpalette) == 0  ){
	free(input_type);
	return COLORPALETTE;
	}
	if( strcmp(input_type, imagepalette) == 0  ){
	free(input_type);
	return IMAGEPALETTE;
	}
	if( strcmp(input_type,reset) == 0){
	free(input_type);
	return RESET;
	}
	if( strcmp(input_type, resetoffset) == 0  ){
	free(input_type);
	return RESETOFFSET;
	}
	if( strcmp(input_type, xyoffset) == 0  ){
	free(input_type);
	return XYOFFSET;
	}
	if( strcmp(input_type, centered) == 0 ){
	free(input_type);
	return CENTERED;
	}
	if( strcmp(input_type, yoffset) == 0   ){
	free(input_type);
	return YOFFSET;
	}
	if( strcmp(input_type, xoffset) == 0   ){
	free(input_type);
	return XOFFSET;
	}
	if( strcmp(input_type, fillpattern) == 0 ||  strcmp(input_type, settile) == 0  ){
	free(input_type);
	return FILLPATTERN;
	}
	if( strcmp(input_type, numberline) == 0 ){
	free(input_type);
	return NUMBERLINE;
	}
	if( strcmp(input_type, obabel) == 0 ){
	free(input_type);
	return OBABEL;
	}
	if( strcmp(input_type, chemtex) == 0 ){
	free(input_type);
	return CHEMTEX;
	}
	if( strcmp(input_type, noreset) == 0  || strcmp(input_type, killreset) == 0 ){
	 return NORESET;
	}
	if( strcmp(input_type, duplicates) == 0 || strcmp(input_type, allowdups) == 0 ){
	free(input_type);
	return ALLOW_DUPLICATES;
	}
	if( strcmp(input_type, arrowarc) == 0 || strcmp(input_type, arcarrow) == 0 ){
	free(input_type);
	return ARCARROW;
	}
	free(input_type);
	ungetc(c,infile);
	return 0;
}



