POV-Ray : Newsgroups : povray.beta-test : Colors.inc : Re: Colors.inc Server Time
28 Jul 2024 14:32:31 EDT (-0400)
  Re: Colors.inc  
From: Le Forgeron
Date: 8 Oct 2008 11:43:50
Message: <48ecd536$1@news.povray.org>
Le Wed, 08 Oct 2008 11:00:40 -0400, Carlo C. a modifié des petits morceaux
de l'univers pour nous faire lire :


> Perhaps in this way? :
> 
> #if (version=3.7) #declare Coral = rgb <1,127/255,80/255>; #else
> #declare             Coral = rgb <1,0.498039,0>; #end
> 
> Thank you for your feedback.

Beware of gamma... W3C probably has not the same gamma as povray now.
Things are fine for <1,0,0> / #FF0000, but #C00000 might be only 
<0.5,0,0>, while #7F7F7F being only <0.25,0.25,0.25>
(fictional numbers here, check your gamma curves!)

To sum up, conversion from W3C colorspace might not be linear for a 
povray include.

Getting colour which change from version is also a bad idea: you are not 
parsing it each time you need it, but usually only once... what about 
scenes with some parts in 3.6 and other parts in 3.7 ? How would you 
handle that ?


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