In article <3d8a59e9$1@news.povray.org>,
 "Wu Yang" <wya### [at] cswrightedu> wrote:

>   I am a new user of pov-ray. I want to know how to get the reflection data
> which are used to form the scenes.

Well, my first thought is that you don't understand how POV does 
reflections. When a ray hits a reflective surface, POV computes the 
direction it would reflect off in from the intersection point and 
normal, and the incoming ray direction and origin. It then starts 
tracing another ray in the reflected direction, and uses the color 
computed along that ray as the reflected color. There isn't any 
"reflection data", just a lot of rays. It sounds like you might be 
looking for environment map data, POV doesn't use environment maps, it 
uses raytracing to compute true reflections instead.

You could hack in a bit of code that writes all reflected rays to a 
file, I don't know if that would be of any use to you. The function to 
modify would be Reflect() in lighting.cpp. Or you could do it at a lower 
level and modify Trace() in render.cpp to output data for every ray 
traced.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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