POV-Ray: Newsgroups: povray.general: linux and windows version produce different output: Re: linux and windows version produce different output

POV-Ray : Newsgroups : povray.general : linux and windows version produce different output : Re: linux and windows version produce different output		Server Time 3 Aug 2024 20:18:16 EDT (-0400)

From: ABX
Date: 12 Nov 2003 11:29:42
Message: <24n4rvc7kdfgu7pamhd11ge2fl0t6opk2q@4ax.com>

On Wed, 12 Nov 2003 17:03:10 +0100, sascha <sas### [at] userssourceforgenet>
wrote:
> Yes, but in this case the windows version shoots reflected rays where the linux
version does not

Somehow I missed 'fresnel' keyword, sorry. In case of 'fresnel' there was a
problem related to equation I also found. This is a line:

  g = sqrt(Sqr(ior) + Sqr(cos_angle) - 1);

in lighting.cpp (in determine_reflectivity()). For some cases (also official
benchmark) it caused evaluation of sqrt for negative values. Depending on
compiler it could behave different.

And this is _not_ fixed yet. Any ideas would be appreciated for sure.

ABX

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