🌀 Chaotic Double Pendulum — 2D Sensitivity to Initial Conditions

2D companion of the chaotic pendulums sim: a real double pendulum (RK4, 1 ms) paired with a near-identical copy, live log-separation graph with a Lyapunov exponent estimate, energy-drift graph and an exact normal-mode period check.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install