# (c) 2008 willem jan hengeveld  itsme@xs4all.nl
# 
# this is a google sketchup plugin, whichs adds all 5 platonic solids
# as a component to your google sketchup environment - http://www.sketchup.com
#
# USE:
# copy this file to 
# /Library/Application Support/Google SketchUp 6/SketchUp/plugins/
# or
# /Users/itsme/Library/Application Support/Google SketchUp 6/SketchUp/Plugins/
# or
# open the ruby console ( window -> ruby console )
# and type  load "/fullpathto/platonic.rb";
#
# todo: figure out how to create a seperate component library
#       to add these solids to.
#
def add_cube
	cube = Sketchup.active_model.definitions.add("ItsCube") ; 

	unit=100/2.54
	p = Array.new ; 
	p[0] = ORIGIN ; 
	p[1] = [unit, 0  , 0] ; 
	p[2] = [unit, unit, 0] ; 
	p[3] = [0  , unit, 0] ; 

	face = cube.entities.add_face(p);

	face.reverse! if face.normal.z < 0;
	face.pushpull(unit);

	trans = Geom::Transformation.new([4*unit,0,0]);
	Sketchup.active_model.active_entities.add_instance(cube, trans) ; 
end

def add_tetra
	tetraeder = Sketchup.active_model.definitions.add("ItsTetra") ; 

	unit=100/2.54
	p = Array.new ; 
	p[0] = [-unit/3, -unit/3,-unit/3] ; 
	p[1] = [unit, 0  ,  0] ; 
	p[2] = [0  , unit,  0] ; 
	p[3] = [0  ,   0,unit] ; 

	tetraeder.entities.add_face([p[0],p[1],p[2]]);
	tetraeder.entities.add_face([p[0],p[1],p[3]]);
	tetraeder.entities.add_face([p[0],p[2],p[3]]);
	tetraeder.entities.add_face([p[1],p[2],p[3]]);

	trans = Geom::Transformation.new([-4*unit,0,0]);
	Sketchup.active_model.active_entities.add_instance(tetraeder, trans) ; 
end

def add_octa
	octaeder = Sketchup.active_model.definitions.add("ItsOcta") ; 

	unit= 50/2.54
	p = Array.new ; 
	p[0] = [ unit, 0  ,  0] ; 
	p[1] = [-unit, 0  ,  0] ; 
	p[2] = [0  ,  unit,  0] ; 
	p[3] = [0  , -unit,  0] ; 
	p[4] = [0  ,   0, unit] ; 
	p[5] = [0  ,   0,-unit] ; 

	octaeder.entities.add_face([p[0],p[2],p[4]]);
	octaeder.entities.add_face([p[0],p[3],p[4]]);
	octaeder.entities.add_face([p[1],p[2],p[4]]);
	octaeder.entities.add_face([p[1],p[3],p[4]]);
	octaeder.entities.add_face([p[0],p[2],p[5]]);
	octaeder.entities.add_face([p[0],p[3],p[5]]);
	octaeder.entities.add_face([p[1],p[2],p[5]]);
	octaeder.entities.add_face([p[1],p[3],p[5]]);

	trans = Geom::Transformation.new([0,4*unit,0]);
	Sketchup.active_model.active_entities.add_instance(octaeder, trans) ; 
end

def add_dode
	dodecaeder = Sketchup.active_model.definitions.add("ItsDode") ; 

	scale=200/(Math.sqrt(5)+1) / 2.54;
	s0=(Math.sqrt(5)-1)/2*scale;
	s1=(Math.sqrt(5)+1)/2*scale;
	unit=scale;

	p = Array.new ; 
	for i in 0 .. 7
		p[i]=[ (i&4)!=0?-unit:unit, (i&2)!=0?-unit:unit, (i&1)!=0?-unit:unit]
	end
	for i in 0 .. 3
		p[i+8]= [ 0, (i&1)!=0?-s0:s0, (i&2)!=0?-s1:s1 ]
		p[i+12]= [ (i&1)!=0?-s0:s0, (i&2)!=0?-s1:s1, 0 ]
		p[i+16]= [ (i&2)!=0?-s1:s1, 0, (i&1)!=0?-s0:s0 ]
	end

dodecaeder.entities.add_face([ p[8], p[9], p[2], p[16], p[0]])
dodecaeder.entities.add_face([ p[8], p[9], p[6], p[18], p[4]])
dodecaeder.entities.add_face([p[10],p[11], p[3], p[17], p[1]])
dodecaeder.entities.add_face([p[10],p[11], p[7], p[19], p[5]])
dodecaeder.entities.add_face([p[12],p[13], p[4],  p[8], p[0]])
dodecaeder.entities.add_face([p[12],p[13], p[5], p[10], p[1]])
dodecaeder.entities.add_face([p[14],p[15], p[6],  p[9], p[2]])
dodecaeder.entities.add_face([p[14],p[15], p[7], p[11], p[3]])
dodecaeder.entities.add_face([p[16],p[17], p[1], p[12], p[0] ])
dodecaeder.entities.add_face([p[16],p[17], p[3], p[14], p[2] ])
dodecaeder.entities.add_face([p[18],p[19], p[5], p[13], p[4] ])
dodecaeder.entities.add_face([p[18],p[19], p[7], p[15], p[6] ])

	trans = Geom::Transformation.new([0,-4*unit,0]);
	Sketchup.active_model.active_entities.add_instance(dodecaeder, trans) ; 
end

def add_ico
	icosaeder = Sketchup.active_model.definitions.add("ItsIco") ; 

	scale=200/(Math.sqrt(5)+1) / 2.54;
	s1=(Math.sqrt(5)+1)/2*scale;
	unit=scale;

	p = Array.new ; 
	for i in 0 .. 3
		p[i+0]= [ 0, (i&1)!=0?-unit:unit, (i&2)!=0?-s1:s1 ]
		p[i+4]= [ (i&1)!=0?-unit:unit, (i&2)!=0?-s1:s1, 0 ]
		p[i+8]= [ (i&1)!=0?-s1:s1, 0,(i&2)!=0?-unit:unit ]
	end

	icosaeder.entities.add_face([p[0],p[4],p[5]]);
	icosaeder.entities.add_face([p[2],p[4],p[5]]);
	icosaeder.entities.add_face([p[1],p[6],p[7]]);
	icosaeder.entities.add_face([p[3],p[6],p[7]]);
	icosaeder.entities.add_face([p[0],p[1],p[8]]);
	icosaeder.entities.add_face([p[0],p[4],p[8]]);
	icosaeder.entities.add_face([p[1],p[6],p[8]]);
	icosaeder.entities.add_face([p[0],p[1],p[9]]);
	icosaeder.entities.add_face([p[0],p[5],p[9]]);
	icosaeder.entities.add_face([p[1],p[7],p[9]]);
	icosaeder.entities.add_face([p[2],p[3],p[10]]);
	icosaeder.entities.add_face([p[2],p[4],p[10]]);
	icosaeder.entities.add_face([p[3],p[6],p[10]]);
	icosaeder.entities.add_face([p[4],p[8],p[10]]);
	icosaeder.entities.add_face([p[6],p[8],p[10]]);
	icosaeder.entities.add_face([p[2],p[3],p[11]]);
	icosaeder.entities.add_face([p[2],p[5],p[11]]);
	icosaeder.entities.add_face([p[3],p[7],p[11]]);
	icosaeder.entities.add_face([p[5],p[9],p[11]]);
	icosaeder.entities.add_face([p[7],p[9],p[11]]);

	trans = Geom::Transformation.new([0,0,4*unit]);
	Sketchup.active_model.active_entities.add_instance(icosaeder, trans) ; 
end


add_cube();
add_tetra();
add_octa();
add_dode();
add_ico();