prem@geomag.fsu.edu (Prem Subrahmanyam) (03/03/90)
I've got a question: how many people working on ray-tracers have code that supports intersections with 3-d quadric surfaces? I know that QRT supports a limited number of them (no elliptical or hyperbolic parabolas). I've recently implemented in my own ray-tracer quadric surfaces that support these as well. If anyone is interested, I can post the source code with explanation as to how it's done (it's really quite easy, but if some soul out there doesn't want to derive it him/herself, I can post). ---Prem Subrahmanyam