---

	Class	Description
	b2Body	A rigid body.
	b2BodyDef	A body definition holds all the data needed to construct a rigid body.
	b2BoundaryListener	This is called when a body's shape passes outside of the world boundary.
	b2ContactFilter	Implement this class to provide collision filtering.
	b2ContactListener	Implement this class to get collision results.
	b2DebugDraw	Implement and register this class with a b2World to provide debug drawing of physics entities in your game.
	b2DestructionListener	Joints and shapes are destroyed when their associated body is destroyed.
	b2World	The world class manages all physics entities, dynamic simulation, and asynchronous queries.