AbstractCollisionDetector AbstractCollisionDetector provides the core collision detection logic abstract to its subclasses.
 Collision Collision provides the data associated with a DisplayObject collision.
 CollisionAngle CollisionAngle provides return angle types for Collision detectors.
 CollisionDetector CollisionDetector provides collision detection to a single target display object against all other display objects registered with the detector (one to many).
 GroupCollisionDetector GroupCollisionDetector provides collision detection to all registered display object against all other registered display objects (many to many).