Reaction-diffusion · seed-2.0-code
Run a Gray-Scott reaction-diffusion simulation on a canvas that grows organic Turing patterns in real time, with the mouse seeding new growth.
transcript · 12 messages
Run a Gray-Scott reaction-diffusion simulation on a canvas that grows organic Turing patterns in real time, with the mouse seeding new growth.
thinking
Let me create a Gray-Scott reaction-diffusion simulation as requested. This is a well-known pattern formation system that models chemical reactions. I'll implement it on an HTML5 canvas with real-time simulation, mouse interaction, and responsive design. Key features needed: 1. Canvas-based simulation using 2D context 2. Two floating-point grids (current and next state) for chemicals A and B 3. Laplacian operator for diffusion 4. Reaction kinetics (feed and kill rates) 5. Mouse interaction to seed B concentrations 6. Color mapping for visualization 7. Performance optimizations Let me write this as a single self-contained HTML file.
/tmp/ws/index.html (17998 bytes)Successfully wrote 17998 bytes to /tmp/ws/index.html
thinking
The file has been created successfully. Let me verify it exists and is well-formed by checking its contents briefly.
{"command":"ls -la /tmp/ws/index.html"}-rw-r--r--. 1 node node 18000 Aug 13 01:32 /tmp/ws/index.html
thinking
The file is present. Let me now start a simple web server to serve it, so the user can view the simulation.
{"command":"cd /tmp/ws && python3 -m http.server 52197","timeout":3600}/bin/bash: line 1: python3: command not found Command exited with code 127
thinking
Python3 is not available. Let me try with node to create a simple server, or check what's available.
{"command":"which node npx python2"}/usr/local/bin/node /usr/local/bin/npx Command exited with code 1
thinking
Node is available. Let me create a simple HTTP server using Node.js to serve the index.html file.
/tmp/ws/server.js (842 bytes)Successfully wrote 842 bytes to /tmp/ws/server.js
thinking
Now let me start the Node.js server to serve the simulation.
{"command":"cd /tmp/ws && node server.js","timeout":3600}TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Gray-Scott simulation grows organic maze-like Turing patterns and responds well to clicks and drags seeding growth.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.