# $Id: DoubleLayer.py 2150 2012-01-16 20:33:48Z bverheg $ *** pyformex ***
##
##  This file is part of pyFormex 0.8.6  (Mon Jan 16 21:15:46 CET 2012)
##  pyFormex is a tool for generating, manipulating and transforming 3D
##  geometrical models by sequences of mathematical operations.
##  Home page: http://pyformex.org
##  Project page:  http://savannah.nongnu.org/projects/pyformex/
##  Copyright 2004-2011 (C) Benedict Verhegghe (benedict.verhegghe@ugent.be) 
##  Distributed under the GNU General Public License version 3 or later.
##
##
##  This program is free software: you can redistribute it and/or modify
##  it under the terms of the GNU General Public License as published by
##  the Free Software Foundation, either version 3 of the License, or
##  (at your option) any later version.
##
##  This program is distributed in the hope that it will be useful,
##  but WITHOUT ANY WARRANTY; without even the implied warranty of
##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
##  GNU General Public License for more details.
##
##  You should have received a copy of the GNU General Public License
##  along with this program.  If not, see http://www.gnu.org/licenses/.
##
"""DoubleLayer

level = 'beginner'
topics = ['structure']
techniques = ['color']

"""

from plugins import formian

clear()
n=10; a=2./3.; d=1./n;
e1 = Formex([[[0,0,d],[2,0,d]],[[2,0,d],[1,1,d]],[[1,1,d],[0,0,d]]],prop=1)
e2 = Formex([[[0,0,d],[1,1-a,0]],[[2,0,d],[1,1-a,0]],[[1,1,d],[1,1-a,0]]],prop=3)
# top and bottom layers
e4 = e1.replic2(n,n,2,1,bias=1,taper=-1).bb(1./(2*n),1./(2*n)/tand(30))
e5 = e1.replic2(n-1,n-1,2,1,bias=1,taper=-1).translate([1,1-a,-d]).bb(1./(2*n),1./(2*n)/tand(30))
# diagonals
e6 = e2.replic2(n,n,2,1,bias=1,taper=-1).bb(1./(2*n),1./(2*n)/tand(30))
e5.setProp(2)
# full structure
out = (e4+e5+e6).translate(2,-d)
draw(out)
