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Fluid simulation · nemotron-3-ultra-550b-a55b

Output generated Cost / run $0.0231 Runtime 37.3s

Prompt for this run

Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.

⛨ sandboxed Open in new tab ↗

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

modelnemotron-3-ultra-550b-a55b
vendorNVIDIA
harnesspi-agent
generated2026-07-22

METRICS

runtime37.3s
tokens in18k
tokens out6.5k
cached128
cost / run$0.0231
Transcript · 6 messages
user

Create a real-time fluid simulation on a full-screen canvas where dragging the mouse pushes swirling colored dye through the fluid.

assistant
thinking
The user wants a real-time fluid simulation on a full-screen canvas with mouse interaction that pushes colored dye through the fluid. This is a classic fluid dynamics simulation using the Navier-Stokes equations, typically implemented using the Jos Stam stable fluids method.

I'll create a single HTML file with:
1. Full-screen canvas
2. Fluid simulation using velocity and density fields
3. Mouse/touch interaction to add velocity and dye
4. Colorful dye visualization
5. Real-time animation loop

Let me write this as a self-contained index.html file.
→ write /workspace/index.html (17806 bytes)
toolResult

Successfully wrote 17806 bytes to /workspace/index.html

assistant
thinking
The file has been created. Let me verify it exists and check if there are any issues.
→ bash {"command":"ls -la /workspace/index.html"}
toolResult

-rw-r--r-- 1 node node 17810 Jul 22 17:37 /workspace/index.html

assistant
thinking
The file has been created successfully. Let me verify it's a valid HTML file by checking the content briefly.

Created `/workspace/index.html` - a self-contained real-time fluid simulation with: - **Jos Stam's Stable Fluids** solver (Navier-Stokes) at 128×128 simulation resolution - **Higher-res dye field** (512×512) for crisp colorful visuals - **Mouse/touch drag** to push velocity and inject swirling colored dye - **8-color palette** that cycles through red→orange→yellow→green→cyan→blue→purple→pink - **Full-screen canvas** with responsive resize - **Controls**: Drag to interact, `Space` to pause, `C` to clear The simulation uses: - Semi-Lagrangian advection for stability - Diffusion for viscosity - Pressure projection for incompressibility - Bilinear interpolation for rendering - Gamma-corrected tone mapping for vibrant colors Open `index.html` in a browser to run it.