Detecting how a ball collided with another ball.

I have a ball that can land on top of another ball. If this happens I want it to know which side it lands on (not relative to rotation relative to the main ball whose landing on top of the ball). How does one say: "okay a collision happened...now how did it actually hit? so i can respond the right way? Giving it a bit of force in the right direction (not wanting to use the bounce materials from the physics engine for this). Just want to know hey it hit it on top left corner. Push it away in that direction a bit.... My current best idea for this is 8 collision boxes on the top of the sphere in each direction and cardinal direction. Has to be a better way.



Screen shot of sort of what I mean... (ball is about to land on top of stone on the right ish, topish, or top rightish side of the stone sphere. ...

 

In your Collision you can find the contact points that generated the collision.

 

oh awesome I didn't know I could get the contact points. It totally works thanks!