/* $XConsortium: viewxf3.pi,v 5.2 94/04/17 20:47:26 rws Exp $ */

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## viewxf3.pi -  
## Test view clipping
## Draw several polylines and verify the presence of pixels inside the
## viewport and the absence of pixels outside the viewport.

source macro.pi
source xpmacro.pi

tbegintest("viewxf3","view clipping");

text = malloc(128);

# SETUP: open phigs and a workstation, open and post a structure

i_open_phigs(NULL,PDEF_MEM_SIZE);
i_open_x_ws(1,&xdisplay,&xwindow,0,0,200,200);
popen_struct(1);
ppost_struct(1,1,1.0);

# INITIALIZATION, OPERATION, VERIFICATION loop follows:
# testing 2D case

# initialize orientation mtx to identity, cliplimit
#    and data for the bounding box
i_identity(orientmtx);
i_identity(mapmtx);
cliplimit = I_Plimit(0.4,0.8,0.4,0.8);
box = IA_Ppoint(5, 0.4,0.4, 0.4,0.8, 0.8,0.8, 0.8,0.4, 0.4,0.4);
plbox = I_Ppoint_list(5,box);

# set view index and draw box that represent the viewport boundary
pset_view_ind(1);
ppolyline(&plbox);

foreach @x1 @y1 @x2 @y2 @on1 @on2 @text (
	0.5; 0.5; 0.7; 0.7; 1; 1; "2D line entirely in";
	0.6; 0.6; 0.3; 0.4; 1; 0; "2D line crossing left edge";
	0.6; 0.6; 0.9; 0.4; 1; 0; "2D line crossing right edge";
	0.6; 0.6; 0.7; 0.9; 1; 0; "2D line crossing top edge";
	0.6; 0.6; 0.5; 0.3; 1; 0; "2D line crossing bottom edge";
	0.3; 0.3; 0.8; 0.3; 0; 0; "2D line entirely out";
)
	line = IA_2_Ppoint(@x1,@y1,@x2,@y2);
	pl = I_Ppoint_list(2,line);
	ppolyline(&pl);
	testpt1 = I_Ppoint3(@x1,@y1,0.0);
	testpt2 = I_Ppoint3(@x2,@y2,0.0);

	# turn clipping off
	viewrep = I_Pview_rep(orientmtx,mapmtx,cliplimit,PIND_NO_CLIP);
	pset_view_rep(1,1,&viewrep);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt1,1,5,1,@text);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt2,1,5,1,@text);
	i_pause();

	# turn clipping on
	viewrep = I_Pview_rep(orientmtx,mapmtx,cliplimit,PIND_CLIP);
	pset_view_rep(1,1,&viewrep);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt1,@on1,5,1,@text);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt2,@on2,5,1,@text);
	i_pause();

	# remove polyline element from structure
	pdel_elem();
end

# testing 3D case
# initialize orientation mtx to identity, cliplimit,
#    and data for the bounding box (3D case)
i_identity3(orientmtx3);
i_identity3(mapmtx3);
cliplimit3 = I_Plimit3(0.4,0.8, 0.4,0.8, 0.4,0.8);
box3 = IA_Ppoint3(5, 0.4,0.4,0.6, 0.4,0.8,0.6, 0.8,0.8,0.6, 0.8,0.4,0.6, 
	0.4,0.4,0.6);
plbox3 = I_Ppoint_list3(5,box3);

# clear structure, set view index and draw the bounding box 
pempty_struct(1);
pset_view_ind(1);
ppolyline3(&plbox3);

foreach @x1 @y1 @z1 @x2 @y2 @z2 @on1 @on2 @text (
	0.5; 0.5; 0.6; 0.7; 0.7; 0.6; 1; 1; "line entirely in";
	0.6; 0.6; 0.6; 0.3; 0.4; 0.6; 1; 0; "line crossing left edge";
	0.6; 0.6; 0.6; 0.9; 0.4; 0.6; 1; 0; "line crossing right edge";
	0.6; 0.6; 0.6; 0.7; 0.9; 0.6; 1; 0; "line crossing top edge";
	0.6; 0.6; 0.6; 0.5; 0.3; 0.6; 1; 0; "line crossing bottom edge";
	0.3; 0.3; 0.6; 0.8; 0.3; 0.6; 0; 0; "line entirely out";
	0.5; 0.5; 0.1; 0.7; 0.7; 0.6; 0; 1; "line crossing back edge";
	0.5; 0.5; 0.6; 0.7; 0.7; 0.9; 1; 0; "line crossing front edge";
)
	line3 = IA_2_Ppoint3(@x1,@y1,@z1,@x2,@y2,@z2);
	pl3 = I_Ppoint_list3(2,line3);
	ppolyline3(&pl3);
	testpt1 = I_Ppoint3(@x1,@y1,@z1);
	testpt2 = I_Ppoint3(@x2,@y2,@z2);

	# turn clipping off
	viewrep3 = I_Pview_rep3(orientmtx3,mapmtx3,cliplimit3,
		PIND_NO_CLIP,PIND_NO_CLIP,PIND_NO_CLIP);
	pset_view_rep3(1,1,&viewrep3);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt1,1,5,1,@text);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt2,1,5,1,@text);
	i_pause();

	# turn clipping on
	viewrep3 = I_Pview_rep3(orientmtx3,mapmtx3,cliplimit3,PIND_CLIP,PIND_CLIP,PIND_CLIP);
	pset_view_rep3(1,1,&viewrep3);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt1,@on1,5,1,@text);
        im_confirm_point3(xdisplay,xwindow,1,1,testpt2,@on2,5,1,@text);
	i_pause();

	# remove polyline element from structure
	pdel_elem();
end

tendtest();
