POV-Ray : Newsgroups : povray.general : speed up isosurface : Re: speed up isosurface Server Time
3 Aug 2024 04:14:32 EDT (-0400)
  Re: speed up isosurface  
From: Christopher James Huff
Date: 4 May 2004 12:02:07
Message: <cjameshuff-D4E156.12012104052004@news.povray.org>
In article <Xns94DFB0D32188Araf256com@203.29.75.35>,
 "Rafal 'Raf256' Maj" <spa### [at] raf256com> wrote:

> are there working tools to speedup isosurface render time (at cost of 
> parsing time) by tringulize them?

No. If you could reliably tessellate an isosurface, you could build two 
rough meshes that bracket the isosurface between them, and use the 
secant method to refine the root. Or use one mesh, and use Newton's 
method with a numerically approximated derivative. The biggest problem 
is that first step: tessellating isosurfaces reliably is hard, and many 
of the algorithms are tied up in patents.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: <chr### [at] tagpovrayorg>
http://tag.povray.org/


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