Mandelbrot explorer · qwen3.5-27b

Output generated Cost / run $0.0057 Runtime 29.7s

Prompt for this run

Render the Mandelbrot set with a smooth color gradient on a full-screen canvas, with click-and-drag to pan and mouse-wheel to zoom.

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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

modelqwen3.5-27b

vendorQwen

harnesspi-agent

generated2026-08-01

METRICS

runtime29.7s

tokens in9.5k

tokens out2.5k

cached0

cost / run$0.0057

Transcript · 6 messages

user

Render the Mandelbrot set with a smooth color gradient on a full-screen canvas, with click-and-drag to pan and mouse-wheel to zoom.

assistant

thinking

The user wants me to create a single-page web app that renders the Mandelbrot set with:
1. Smooth color gradient
2. Full-screen canvas
3. Click-and-drag to pan
4. Mouse-wheel to zoom

I'll create a self-contained HTML file with all CSS and JavaScript inline. Let me write this out.

Key features needed:
- Canvas element that fills the screen
- Mandelbrot set rendering algorithm
- Smooth coloring using iteration count interpolation
- Pan functionality (mousedown, mousemove, mouseup)
- Zoom functionality (wheel event)
- Responsive to window resize

Let me write this as a complete index.html file.

→ write /tmp/ws/index.html (7837 bytes)

toolResult

Successfully wrote 7837 bytes to /tmp/ws/index.html

assistant

thinking

I've created the index.html file with all the required features:
1. Full-screen canvas for the Mandelbrot set
2. Smooth color gradient using HSL-to-RGB conversion with multiple color cycles
3. Click-and-drag panning
4. Mouse-wheel zooming (zooms toward cursor position)
5. Bonus: keyboard shortcuts for navigation

Let me verify the file was created correctly.

→ bash {"command":"ls -la /tmp/ws/index.html"}

toolResult

-rw-r--r--. 1 node node 7837 Aug 1 20:15 /tmp/ws/index.html

assistant

thinking

The file is created successfully. Let me provide a summary of what was built.

Done! Created `/tmp/ws/index.html` with: - **Full-screen canvas** rendering the Mandelbrot set - **Smooth color gradient** using HSL interpolation across multiple hue cycles - **Click-and-drag panning** to explore different regions - **Mouse-wheel zooming** that centers on the cursor position - **Keyboard shortcuts**: `+/-` to zoom, arrow keys or `h/j/k/l` to pan, `Home` to reset