2d physics like Angry Birds

[themadanimator]

Angry Birds uses Box2D which is a dedicated 2D physics engine. Trying to adapt a 3d physics engine like PhysX to 2D could lead to issues.

In the PhysX Shape operator there are locks you can put on the pos/rotation axis of each particle...you could adjust these so that the particles only move/rotate in 2D and see what happens...

Thanks for your response. That's exactly what I tried and, like you said, I got unexpected results. I'll keep messing with it.