cleanup and optimization of interactive behavior
cleanup and optimization of interactive behavior

Nayar/PhysicsJS,Rawneed/PhysicsJS,griever989/PhysicsJS,Nayar/PhysicsJS,rohit765/PhysicsJS,pietro909/PhysicsJS,jpellerin/PhysicsJS,Rawneed/PhysicsJS,rohit765/PhysicsJS,wellcaffeinated/PhysicsJS,griever989/PhysicsJS,Luwdo/PhysicsJS,VANITAX/PhysicsJS,wellcaffeinated/PhysicsJS,Luwdo/PhysicsJS,haithemaraissia/PhysicsJS,pietro909/PhysicsJS,VANITAX/PhysicsJS,mcanthony/PhysicsJS,eric-seekas/PhysicsJS,eric-seekas/PhysicsJS,haithemaraissia/PhysicsJS,mcanthony/PhysicsJS,jpellerin/PhysicsJS