Matter.jsRigid bodies Compound bodies Composite bodies Concave and convex hulls Physical properties (mass, area, density etc.) Restitution (elastic and inelastic collisions) Collisions (broad-phase, mid-phase and narrow-phase) Stable stacking and resting Conservation of momentum Friction and resistance Events Constraints Gravity Sleeping and static bodies See all features
http://lonely-pixel.com/lab/ballcurves/
