Swift-Hohenberg

∂u/∂t = ru − (1+∇²)²u + gu² − u³. Controls stripe, hexagon, and labyrinthine patterns. The cubic-(1+∇²)² term selects a preferred wavelength.

r (bifurcation param): 0.3 g (quadratic): 0.5 Preset: Stripes (g=0) Hexagons (g>0) Labyrinth (r small) Reset & Randomize Pause