POV-Ray : Newsgroups : povray.unofficial.patches : Isosurface+pigment...surface imperfections : Re: Isosurface+pigment...surface imperfections Server Time
2 Sep 2024 20:14:38 EDT (-0400)
  Re: Isosurface+pigment...surface imperfections  
From: SamuelT 
Date: 15 Aug 1999 22:43:36
Message: <37B77BB2.C91212D0@aol.com>
I have heard of something called a density map. What is it and how can I make one?
Perhaps that is what I need.

Thanks.

Samuel Benge

Matthew Corey Brown wrote:

> I suggest you use a 16 bit heigtfield for the pigment. Particularly
> the TGA type (the one where if you look at it its red green and yellow)
> I wrote the code to use the red portion as most signifigant and the
> green
> portion as least.
>
> But i belive the main problems come from spherical mapping of 2d images.
> The orgional isosurface code (which i didn't touch just added a new
> function
> to turn a 3d pigment to a number between 0 and 1) needs to have real 3d
> info. SPherical mapping of 2d images don't give true 3d data so
> intersection
> and normal tests can run into errors. To fix things of this type the
> actual
> resolving code would need to be changed and that could break backwards
> compatibilty.
> (and to be honest that portion of the iso surface code is beyond me)


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