POV-Ray : Newsgroups : povray.binaries.misc : transformation matrix : Re: transformation matrix Server Time
2 Dec 2022 21:56:52 EST (-0500)
  Re: transformation matrix  
From: Bald Eagle
Date: 25 Dec 2018 14:25:01
Message: <web.5c2283baa8b241df765e06870@news.povray.org>
"jr" <cre### [at] gmailcom> wrote:
> hi,
> the documentation for the transformation matrix says: "... you will not use the
> matrix keyword because it is ... harder to visualize."  however, although
> "mathematically challenged", I'd like to learn to use it on occasion.
> that in mind, can someone please explain why the manual ( mentions a
> "..fourth column implicitly set to <0,0,0,1>..", but the subsequent equations do
> not include/use those values.

Because all of those things are affine transform matrices.

IIRC, those other numbers change when you start to use projection matrices and
other transformations.




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