How do I create collision detections for my bouncing balls?

Question

I have coded an animation (in python) for three beach balls to bounce around a screen. I now wish to have them all collide and be able to bounce off each other. I would really a

Answer 1

First you need to check collision with rect.colliderect(other_rect)

after that if they are colliding, you can check pixel perfect collision. So you don't mess with object's radius or shape.

For pixel perfect collision checking, I use Masks: Make both mask objects with mask.from_surface, then put them to Mask.overlap function.