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From: sulaiman@ecs.umass.edu
Newsgroups: comp.graphics.visualization
Subject: Icosahedron help
Message-ID: <13560.282553e7@ecs.umass.edu>
Date: 6 May 91 13:02:31 GMT
Lines: 11


 I need to find out how you would define the equations for all 12 
planes of an icosahedron centered at 0,0,0. I am building a ray tracer
and i need to compute hit times (t in and t out) for several platonic solids
including .... an icosahedron ...

Thanx

P.S. I guess I need the equations for each plane. The vertices and edges
I think I already have figured out. oooops replace all reference to 'planes'
with 'faces'