Event-based collision detection

[chpatton013]

Event-based collision detection would require tracking which Boundable’s are colliding at each update cycle and only notifying the user of the library when this state changes. Implementing this in Driver would incur a heavy cost for all users, even those that only care to see collision polling reported. A more sustainable solution is to allow users (or State’s) to implement the collision tracking to achieve event-based collision detection.