I am not an expert on OpenGL, but i belive that OpenGL renders objects by
requiring that they be tesselated into triangles. Fortunately OpenGL
supplies functions for doing this. This is what i gathered from skimming the
SDKs that i have, and it may be incorrect.

Kyle

Ken Cecka wrote in message <346c1929.0@news.povray.org>...
>This brings up a good questions that I've been wondering about.  Does
OpenGL
>do realtime CSG?  As far as I know, OpenGL just processes triangle meshes,
>not true mathematical objects of the type pov uses.  You would have to
>convert your objects to meshes, crunch out the csg's on your processor, and
>then send them to the card for display.  That would really defeat the
>purpose of pov, since it tries to avoid meshes.  But I really don't know a
>lot about OpenGL.  Does it have built in functionality for CSG?
>
>Ken
>...

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