In article <3dcc1ea5@news.povray.org>, "Wu Yang" <wya### [at] cswrightedu> 
wrote:

> I think there are maybe more than or less than one intersection point in the
> stack, and they are the intersection points with the same ray, and what I
> need is Best_Intersection->IPoint in Trace() function(render.cpp file). Is
> it right? Thanks.

What you need is to buy and read a good C++ book or take a good course 
in C++, and then take the time to actually figure out what the POV-Ray 
source code does before trying to make any changes.

If you then have a problem, state the entire problem and your goal 
clearly at the very start, not some useless "is it right" garbage that 
keeps everyone guessing as to what you are really doing. There really is 
a category of "stupid" questions, and most of yours fit in it...you 
could most likely easily figure out the answer yourself, if you knew the 
language the source code is written in.

And finally, *READ THE REPLIES*. I don't know why some people just 
ignore it when people give them the answer, or worse, ignore the answer 
and go off on a wild goose chase...

Now: where is Trace() defined? What does that code say it does? It says 
nothing about meshes, does it? The Trace() function is called to compute 
the color seen along a ray, adding this code there won't catch all 
intersection tests, but it will catch any kind of intersection, not just 
ones with meshes. I can't tell you how to do it, because you haven't 
said *what* you are trying to do, or what your goal is.

-- 
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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