Path: utzoo!attcan!uunet!know!samsung!umich!umeecs!zip!spencer From: spencer@eecs.umich.edu (Spencer W. Thomas) Newsgroups: comp.graphics Subject: Re: Ray/patch intersection Message-ID: Date: 19 Sep 90 18:22:32 GMT References: <3632.26f78d3f@cc.curtin.edu.au> Sender: news@zip.eecs.umich.edu Organization: University of Michigan EECS Dept Lines: 18 In-Reply-To: Kessells_SR@cc.curtin.edu.au's message of 19 Sep 90 07:22:39 GMT In article <3632.26f78d3f@cc.curtin.edu.au> Kessells_SR@cc.curtin.edu.au writes: Can someone please tell me where I can find an algorithm for finding the intersection of a ray and a Bezier and/or B-Spline patch. You might look at Lischinski and Gonczarowski, "Improved techniques for ray tracing parametric surfaces," Visual Computer, Vol 6, No 3, June 1990, pp 134-152. Besides having an interesting technique, they refer to most of the other relevant work. -- =Spencer W. Thomas EECS Dept, U of Michigan, Ann Arbor, MI 48109 spencer@eecs.umich.edu 313-936-2616 (8-6 E[SD]T M-F)