Reaction-Diffusion

Grid: 300x300 cell grid, 2 pixels per cell on 600x600 canvas
Model: Gray-Scott reaction-diffusion with two chemicals (A and B). Chemical A is consumed and B is produced by the reaction A + 2B → 3B.
Diffusion: Weighted 5-point Laplacian stencil (cardinal +0.2, diagonal +0.05)
Rendering: Direct pixel manipulation via loadPixels/updatePixels with 256-entry precomputed color lookup table
Parameters: Feed rate (F) controls how fast A is replenished. Kill rate (k) controls how fast B decays. Different F/k combinations produce wildly different pattern families.

Gray-Scott reaction-diffusion — two virtual chemicals interact to produce organic patterns ranging from cell mitosis to coral growth to labyrinthine mazes.

How to use: Watch patterns emerge from the center seed. Use pattern presets to explore different parameter regimes. Drag F and k sliders to morph patterns in real-time. Click the grid to drop more chemical. Try different color palettes.

Steps/frame: 5
Feed (F): 0.0367
Kill (k): 0.0649
Pattern: Seed: Colors: