🎶 Pendulum Wave with Finite Amplitude: Elliptic Periods and Compensated Lengths

Fifteen rigid-rod pendulums released together: exact RK4 swings show how a large release angle stretches every period by the elliptic-integral factor, ruins the 60-second wave revival, and how re-tuning the rod lengths repairs it.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install