sulaiman@ecs.umass.edu (05/07/91)
I am trying to build a ray tracer that includes in its object files an icosahedron. I am just wondering how people have defined each of the faces of an icosahedron. For this purpose I am assuming an icosahedron centered at 0,0,0 that is built inside a unit cube. I already know the vertices and edges but how do you algebraicly(sp?) define a given face so I can determine whether a ray hits it or not. Thanx in advance. Ameer. P.S. Sorry if this seems like a truly trivial question to someone out there.