Hi, Im trying to detect collision in p2 from one side (like jumping on top of something) its easy with arcade phisics, but p2 don't have such option, i think. So is there any way to implement this? if not than I was thinking about sticking another invisible body to a side of object and detect collision with that second object instead. But I dont know how to stick other object to first one and I've experimented with RevoluteConstraint to do it but it;s not what I intended. my code: var constraint = game.physics.p2.createRevoluteConstraint(arrow, [20, 5.5 ], arrowTop, [5.5,5.5]); constraint.collideConnected=false; constraint.setStiffness(600); constraint.update();but it behave like two objects on elastic rope so sometimes arrowTop if closer to arrow and sometimes its further . even if I set more stiffness it's bouncing. Is there way to stick two bodies like on glue instead of rope ?