getUniqueId = function getUniqueId(){

        return uid++;
    }
class SweepPruneBehavior < Behavior

`Physics.behavior('sweep-prune')`.

Sweep and Prune implementation for broad phase collision detection.

This massively improves the speed of collision detection. It's set up to always be used with [[BodyCollisionDetection]], and [[BodyImpulseResponse]].

Additional options include:
- channel: The channel to publish collision candidates to. (default: `collisions:candidates`)