Send all current PhysicsWorld.contactBeginEvents and PhysicsWorld.contactEndEvents where either of the PhysicsShape involved are valid (see PhysicsShape.isValid ) and have a callback target assigned (see PhysicsShape.callbackTarget ). Only callback targets that implement PhysicsCallbacks.IContactCallback will be called. This is called automatically every simulation step. This must be called on the main thread.

public void SendContactCallbacks()