Interact with the Shapes by Mouse, Touch or Tilt. Tilt can be emulated on a PC using the Controls Panel (Top Right). The simulation uses the 'SAT' approach to detect collisions. 'Repel' is achieved by allowing shapes to partially violate 'SAT'. Open the controls panel to adjust the simulation. The motion of the individual shapes is controlled using 'verlet integration' and their rigidity is maintained using angular, length and pin constraints.