Fluid simulation · qwen3.5-397b-a17b
Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.
transcript · 6 messages
Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.
thinking
The user wants me to create a real-time fluid simulation as a single-page web app. This is a classic computer graphics project that typically uses the Navier-Stokes equations for fluid dynamics. I'll create a self-contained HTML file with: 1. A full-screen canvas 2. Fluid simulation using a grid-based solver (likely Jos Stam's "Stable Fluids" algorithm) 3. Mouse interaction to add dye and velocity 4. Colorful swirling effects Let me write a complete implementation with: - HTML structure with a canvas element - CSS for full-screen styling - JavaScript implementing the fluid simulation with: - Grid-based velocity and density fields - Advection, diffusion, and projection steps - Mouse/touch interaction for adding dye and velocity - Colorful rendering I'll use a simplified but visually appealing fluid simulation approach.
/tmp/ws/index.html (12798 bytes)Successfully wrote 12798 bytes to /tmp/ws/index.html
thinking
I've created a complete fluid simulation in a single HTML file. Let me verify it was created correctly.
{"command":"ls -la /tmp/ws/index.html"}-rw-r--r--. 1 node node 12798 Aug 1 19:59 /tmp/ws/index.html
thinking
The file was created successfully. Let me provide a summary of what I built.
Created `index.html` - a self-contained fluid simulation with: **Features:** - **Full-screen canvas** with responsive resizing - **Navier-Stokes fluid solver** using Jos Stam's "Stable Fluids" algorithm - **RGB dye channels** for colorful swirling effects - **Mouse/touch interaction** - drag to push fluid and add colored dye - **Cycling rainbow colors** that change as you drag - **Swirling motion** - adds rotational velocity for more interesting patterns - **Gradual fade** - dye slowly dissipates over time **How it works:** 1. **Advection** - moves dye and velocity through the field 2. **Diffusion** - spreads values to neighboring cells 3. **Projection** - maintains mass conservation (incompressibility) 4. **Rendering** - maps the density grid to canvas pixels Open the file in a browser and drag your mouse/touch across the screen to create swirling colored dye patterns!
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
Fluid dye simulation responds to drag and wheel with colored blobs, but lacks visible swirling detail and click did nothing.
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.