# MARTIAN HOMEWORK... WHAT WE DID IN CLASS TODAY

 ```""" tetrahedron.py by K. Urner for Saturday Academy, Martian Math Summer camp 2010 @ Reed College http://www.4dsolutions.net/satacad/martianmath/ """ from stickworks import Qray, Edge, getedges from visual import * def setscene ( ): """set the stage for our little drama""" scene2 = display(title='Drawing a Duo-Tet Cube', fullscreen= True, autoscale = False, background=color.white, scale = vector(0.1, 0.1, 0.1)) return scene2 def duotet( ): """ draw a two tetrahedra (orange and black) in a green cube using Qrays from stickworks.py """ scene = setscene( ) scene.select( ) a, b, c, d = Qray((1,0,0,0)), Qray((0,1,0,0)), Qray((0,0,1,0)), Qray((0,0,0,1)) e, f, g, h = -a, -b, -c, -d # dual tetrahedron for stick in (a,b,c,d): stick.draw() for edge in ((a,b), (a,c), (a,d), (b,c), (c,d), (d, b)): stick = Edge(*edge) stick.color = color.orange stick.draw() for edge in ((e,f), (e,g), (e,h), (f,g), (g,h), (h, f)): stick = Edge(*edge) stick.color = color.black stick.draw() cube_faces = [(a,h,c,f),(a,h,b,g),(b,e,c,h),(b,e,d,g),(d,g,a,f),(c,e,d,f)] for edge in getedges ( cube_faces ): stick = Edge(*edge) stick.color = color.green stick.draw() print "OK, done..." return if __name__ == "__main__": duotet( ) ```