Ball to Ball Collision - Detection and Handling

Question

With the help of the Stack Overflow community I\'ve written a pretty basic-but fun physics simulator.

Answer 1

I found an excellent page with information on collision detection and response in 2D.

http://www.metanetsoftware.com/technique.html

They try to explain how it's done from an academic point of view. They start with the simple object-to-object collision detection, and move on to collision response and how to scale it up.

Edit: Updated link

Answer 2

You should use space partitioning to solve this problem.

Read up on Binary Space Partitioning and Quadtrees