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From: jet@karazm.math.uh.edu (J. Eric Townsend)
Newsgroups: comp.graphics
Subject: Want more info on SEADS
Message-ID: <1990Sep13.004925.6942@lavaca.uh.edu>
Date: 13 Sep 90 00:49:25 GMT
Sender: nntppost@lavaca.uh.edu (NNTP Posting Service)
Organization: University of Houston -- Department of Mathematics
Lines: 23



Just read "ARTS: Accelerated Ray-Tracing System" by Fujimoto, Tanaka
and Iwata (IEEE CG&A, Apr 86).

They talk about using SEADS (Spatially Enumerated Auxiliary Data
Structure) with a 3D DDA.

My question is this:  What is SEADS, really?  From what I can tell
it's just a 3D array.  If that's true, there's no way they could
have run their test cases on their equipment in the times they
show. A 512x512x512 array on a 4Mb Vax 750?  Maybe it's an
octree, but they talk about how much better SEADS is than
an octree.

If anyone knows of where I can find an implementation of SEADS,
that would be best.  In any case, if you know anything more about
this, please let me know...
--
J. Eric Townsend -- University of Houston Dept. of Mathematics (713) 749-2120
Internet: jet@uh.edu
Bitnet: jet@UHOU
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