gpu-conway-life

GPU-accelerated Conway's Game of Life experiments using Three.js + @react-three/fiber.

The default demo is Neon Micro-City: it renders alive cells as instanced "buildings" whose height/glow/color are driven by a GPU simulation texture.

Run it

• npm install
• npm run dev

Demos

Neon Micro-City (default)

• /

Sim-on-mesh (project the sim onto an arbitrary mesh)

• /?demo=mesh

Examples (multi-page)

• Rotating primitives (cube + sphere + dodecahedron): /examples/rotating-primitives/

Reusable sim module (src/neon-sim/)

The goal is to make the simulation and sampling reusable for other R3F / Three apps.

For a step-by-step guide (including copying into another app), see:

• docs/neon-sim/README.md

Rules (Life / HighLife / Custom)

Rule variants are supported by the simulation (runner/pass) and change what gets written into the state texture. The material only visualizes uState and does not need to know the rule.

Supported presets:

• rule: 'life' (B3/S23)
• rule: 'highlife' (B36/S23)
• rule: 'custom' with ruleString: 'B.../S...'

Notes

• The simulation requires float render targets (EXT_color_buffer_float). Unsupported environments show a full-screen fallback. This demo uses the reusable simulation module under src/neon-sim/.