Base class for controllers. Controllers are a convience for encapsulating common per-step functionality.
Body count.
List of bodies.
Adds a body to the controller.
Body to add.
Removes all bodies from the controller.
Debug drawing.
Handle to drawer.
Gets the body list.
Body list.
Gets the next controller.
Next controller.
Gets the world.
World.
Removes a body from the controller.
Body to remove from this controller.
Step
b2TimeStep -> Private internal class. Not sure why this is exposed.