Physics by the balls.

Awhile back I tried to make a simple physics engine to deal with circle to circle collisions. I spent weeks on this and finally got semi-reliable results.

After playing with box2d for one morning, I got everything in a physics engine I had set up and more: I had n-gon collisions, circle collisions, and at a speed that far-exceeded my own engine.

Hopefully utilizing other's work I can design something without having to deal too much in the minutia.