Presets
Excitable Medium
quiescent — drag to pace & watch a pulse fire, propagate, and recover
Pacemaker
a steady source emits rings that collide and annihilate
Spiral Wave
ε=0.012 — a broken wavefront curls into a rotor
Spiral Pair
ε=0.012 — a torn wave segment spawns counter-rotating vortices
Spiral Turbulence
a=−0.03 — rotors fragment into chaotic fibrillation
Palette
Kinetics
Threshold a
0.12
Recovery b
0.50
Time-scale ε
0.012
Speed
15
Brush
8
↺ Reset
⏸ Pause
✕ Quench
a:
0.12
b:
0.50
ε:
0.012
step:
0
∂v/∂t = ε(bu − v)
Drag
— stimulate (pace)
Right drag
— suppress (block)
Space
— pause / play
R
— reset