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From: mfisher@tictoc.cis.ohio-state.edu (matthew eric fisher)
Newsgroups: comp.graphics
Subject: 3dda
Keywords: 3dda , spatial subdivision, Eurogrphics
Message-ID: <87262@tut.cis.ohio-state.edu>
Date: 14 Jan 91 19:35:21 GMT
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I looking for code, algorithim, or an explanation of the three dimensional 
digital difference analyzer.  I have implemented a uniform spacial subdivision
ray tracer.  I am having problems getting it perfect. I have implemented a 3dda
but it is a major hack and I suspect it to be the cause of my problems.  Also 
for ray tracing the 3dda needs to identify every pixel hit not just the closest
one.  I saw a listing for an article in Eurographics 87 that seemed applicable.
Where can I get a copy of Eurographics 87 though?  I would be thankful for any
help.
     Matthew Fisher