It would be very useful to have
glutMainLoopEvent() return fgNextTimer().
When integrating glut with other event loops
that provide timers, this would provide a means
to compute how long we can sleep before
invoking glutMainLoopEvent() again.
Another plus would be to have a X11 specific
This would considerable help the implementation
of OpenGL in Lush (lush.sourceforge.net).
It currently relies on walinking the internal
glut data structures...
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