Ripple Dot Grid

About

The screen fills with a tight grid of dots. Drag or tap anywhere and the dots near your pointer get shoved out of the way, then spring back home with a bouncy, damped wobble. It handles several touches at once, so every finger sets off its own ripple.

Techniques

• Spring-mass physics
• Semi-implicit Euler integration
• Radial repulsion
• Damped oscillation
• Multi-pointer input (Listener)
• Idle-skip optimisation