I've been having fun with my balls... uh, anyway, I've converted that old C 
code of mine entirely to SDL.

The physics, the ball collisions and rotations are pretty solid.  Stupidly, 
the part I haven't gotten my head around entirely is how to rotate the 
Povray spheres for display!  You'll notice the ball rotations "drift" a 
little, visually not rotating exactly as the physics engine is rotating.  
So, while the physics is doing the right thing, the Povray ball "rotation" 
visuals seem to indicate something's off, but it's just the sphere's visual 
rotation.  I wish I could just directly apply my physics rotation vectors 
to the sphere.  I've got to fix that visual problem otherwise I'll need to 
make the balls solid colors ;-).  I'll work on that.

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