POV-Ray: Newsgroups: povray.general: Ray intersection test: Can't get my epsilon value right. I think.: Ray intersection test: Can't get my epsilon value right. I think.

POV-Ray : Newsgroups : povray.general : Ray intersection test: Can't get my epsilon value right. I think. : Ray intersection test: Can't get my epsilon value right. I think.		Server Time 30 Jul 2024 12:22:54 EDT (-0400)

From: [GDS|Entropy]
Date: 6 Feb 2009 14:55:19
Message: <498c95a7@news.povray.org>

Greetings,

I am working with the ray intersection macro provided by triple_r, which 
works well, but I can't seem to get my epsilon value right. I think. Or I'm 
doing something else wrong...maybe. (thought I'd just post the question with 
the image, instead of three seperate posts to three seperate forums[image, 
source and question, respectively]...seemed a better choice..apologies if I 
was wrong)

What seems to happen is that with epsilon of 1.0-e10, only 1/2 of the glows 
are drawn, including the wrong ones. Using 1.0e-1 I can get all of the glows 
to draw, including the wrong ones. Values in between change little.

The ray intersection method seems to work fine for a single object like a 
cube at e-10. Additionally it does not appear to matter which object I test 
against.

Any ideas?

ian

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Download 'glowthruObjectFix_Test_2.pov.txt' (5 KB) Download 'glowthruObjectFix_Test_2.gif' (34 KB)

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