POV-Ray : Newsgroups : povray.off-topic : Viewing frustum question : Re: Viewing frustum question Server Time
4 Sep 2024 11:20:05 EDT (-0400)
  Re: Viewing frustum question  
From: Fredrik Eriksson
Date: 13 Feb 2010 13:41:42
Message: <op.u72wvnkm7bxctx@toad.bredbandsbolaget.se>
On Sat, 13 Feb 2010 18:42:35 +0100, Darren New <dne### [at] sanrrcom> wrote:
> As far as I can figure, there's no way to represent near and far  
> clipping planes in a transformation matrix, right? The camera itself (in  
> some sense) has to carry them along separately?  I.e., the near and far  
> clipping planes don't get represented anywhere in a normal 4x4  
> transformation matrix?

Typically, the perspective transform is defined such that the resulting  
z-coordinates fall in a suitable range (e.g. [0,1]). Clipping can then be  
performed without knowledge about the original clipping planes.



-- 
FE


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