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From: chet@netcom.netcom.COM (Eric Chet)
Newsgroups: comp.graphics
Subject: Ray Intersection, bspline surface of revolution
Message-ID: <1991May16.075304.27436@netcom.COM>
Date: 16 May 91 07:53:04 GMT
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Originator: chet@netcom.netcom.com



Hello

     To all raytracing guru's.  I would like to ray trace a surface of
revolution.  Defined as a bspline curve revolved around axis V.  I
would like to do this without converting to a mesh.  My question is how 
do I intersect my ray with a 2D slice of the revolved bspline curve?
Also the bspline should be defined by N control, points.



                    V
                    
                    |
                    |.
                    | . 
                    |  .
                    |  .
                    |  .
                    |   .
                    |    .
                    |    .
                    |    .
                    |  ..
                    |..
                    |________________________ U
                    

Thank you in advance
Eric J. Chet -- chet@netcom.com


-- 
~
/**************************************************************************
 * Eric Chet       | Amiga does it better
 * chet@netcom.com | Ray Tracing and other graphics techniques 
 *                 | "Use what is useful, simply to simplify"
 */