Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!apple!versatc!mips!prls!philabs!ttidca!quad1!avatar!kory
From: kory@avatar.UUCP (Kory Hamzeh)
Newsgroups: comp.graphics
Subject: Re: Need Help with Refractions
Summary: I figured it out.
Keywords: refractions, ray-tracing
Message-ID: <117@avatar.UUCP>
Date: 21 Apr 89 23:09:35 GMT
References: <116@avatar.UUCP>
Distribution: usa
Organization: Kory Hamzeh, Canoga Park, Ca, USA
Lines: 27


I posted an article yesterday about some problems I was having with
refractions in my tracer. After several more hours of debugging I
found the following two bugs which fixed the problem:

	- I had the 2 indicies (sp?) of refraction backwards.
	- I had forgotten to take into account percision errors
	  in my sphere intersect routine. The interesting thing
	  is that percision errors didn't seem to effect the
	  illumination model or the reflections.


Anyway, it all works fine now.

I do have another question. What is the best and/or easiest method
for modelling hallow transparent spheres?

Any help would be greatly appreciated.

Thanks,
--kory


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Kory Hamzeh			    UUCP:     ..!uunet!psivax!quad1!avatar!kory
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