[DUG]: Open GL question

[Colin Fraser]

Hi all,

I am just playing round (a little) with open GL.

One thing that I can't find out how to do is to get a 2D co-ordinate (in
pixels of the window client area) of a point in 3D space.
I want to know this so that I can tell when an object flies off my window.

Anyone have any ideas or pointers??

Regards
Colin Fraser

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