POV-Ray : Newsgroups : povray.general : Question about bicubic patches : Re: Question about bicubic patches Server Time
10 Aug 2024 03:21:19 EDT (-0400)
  Re: Question about bicubic patches  
From: Ron Parker
Date: 10 Mar 2000 09:16:11
Message: <38c903ab$1@news.povray.org>
On 10 Mar 2000 08:09:29 -0500, Nieminen Juha wrote:
>David Curtis <spa### [at] junkmailcom> wrote:
>: I've just read from the docs that POV converts the bicubic patch into
>: triangles. My question is why? It seems obvious that it must have something
>: to do with
>: computation time, and the fact that there is no great advantage to spending
>: the time calculating a intersection point for every ray. Does that sound
>: right?

>  I understand this to mean that the patch is not converted to triangles if
>it's of type 0 (at least at parse time).

True, but it's still converted to triangles at render time.

I think MegaPOV still has the "type 2" bicubic patch, which evaluates the
bicubic directly.

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html


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