FORCED VDP 3D · ≤650 · DRAG PAN · PINCH ZOOM · TAP SEED
REDUCED MOTION · SETTLED ATTRACTOR
μ
8.53
SPEED (dt)
0.01
FADE
0.08
PRESETS
Forced van der Pol — dx/dt=y, dy/dt=μ(1−x²)y−x+F cos θ, dθ/dt=ω (ω=2π/T). Classic μ=8.53 F=1.2 T=10. Distinct from van-der-pol.html (unforced 2D). RK4. Gold trail, cap 650. RM = settled silhouette.