POV-Ray: Newsgroups: povray.binaries.images: NURBS's

POV-Ray : Newsgroups : povray.binaries.images : NURBS's		Server Time 8 Aug 2024 14:20:31 EDT (-0400)

From: triple r
Subject: NURBS's
Date: 7 Jun 2005 03:40:00
Message: <web.42a54ed6dbe6460920cb1ca60@news.povray.org>

NURBS...  NURBS's... NURBSi...?
Either way, here's the result of some work tonight with a c++ program in
p.b.s.f. to read points and output a single nurbs patch to a uv-mapped
mesh2 file with normals.  Any degree works fine for u and v dimensions.
Parses a simple input file.  Improvements planned, but here it is for now.
Still needs more testing.  Here it is finishing off a fillet nicely with a
10x10 patch, although I don't know the math to find the weight of the
middle point such that everything is perfectly circular.  Let me know if
it's useful at all, otherwise I'll assume the worst...

 - Ricky

Ooh.  Maybe I'll make it so if you leave out weights, it assumes those are 1
also - it already figures out the knot vector if you leave that out.

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From: triple r
Subject: Re: NURBS's
Date: 7 Jun 2005 03:45:00
Message: <web.42a54f8a7878ab5020cb1ca60@news.povray.org>

Oops.

 - Riicky

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From: triple r
Subject: Re: NURBS's
Date: 7 Jun 2005 04:45:00
Message: <web.42a55df77878ab5020cb1ca60@news.povray.org>

Okay.  Here's a little better illustration than a 3x3 patch of what it can
do.  This one's 12x9 with a 50x50 output.  Total time running the script
was about one second.  Parsing time in pov was not more than two seconds.
Just a humanoid-shape based on a grid of points lying around on my hard
drive.

 - Ricky

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