In case you want to do something to a body during each creation (such as add an Actor object),
you can override the PhysicsUtils class and override this method.
Next Largest Power of 2:
Given a binary integer value x, the next largest power of 2 can be
computed by a SWAR algorithm
that recursively "folds" the upper bits into the lower bits.
normal -
Variable in class org.jbox2d.collision.Manifold