magnum nous apporta ses lumieres ainsi en ce 29/07/2004 08:31... :

>Sorry to ask this (maybe stupid and denoting a total lack of knowledge on
>how POV-Ray works) question, but is it possible to gather and dump to a
>file raytracing informations during the raytracing process, for example by
>using SDL ?
>
>I think for example of the possibility to gather for each ray the initial 3D
>vector parameters of this ray from the camera, and then to get the end 3D
>vector after the raytracing process for this ray (and/or the point in the
>"world" where it gets).
>
>I would like to use POV-ray to gather informations about the effects of
>refraction of a "complex" scene mainly made of transparent objects. Is it
>possible ?
>
>
>  
>
Using photons will show you where the light goes after the diffraction. 
Set a light_source to emit photons and set your transparent objects as 
target with refraction on. You need some surfaces for the photons to 
show on. Be ready for a prety long render.
Look at section 3.5.3 in the documentation to set your photons scene.

Alain

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