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From: ksbooth@watcgl.waterloo.edu (Kelly Booth)
Newsgroups: comp.graphics
Subject: Re: Ray tracing: ray-object intersection
Keywords: Ray Tracing, Intersection, Trivial Rejection
Message-ID: <6122@watcgl.waterloo.edu>
Date: 3 Oct 88 15:19:53 GMT
References: <522@versatc.UUCP>
Reply-To: ksbooth@watcgl.waterloo.edu (Kelly Booth)
Organization: U. of Waterloo, Ontario
Lines: 7

In article <522@versatc.UUCP> ritter@versatc.UUCP (Jack Ritter) writes:
>
 [lots of stuff deleted]
>
>Surely this has been tried, hasn't it?

Yes.  Lots of times.