Boids flocking · qwen3.7-flash
Create a full-screen flocking simulation of boids using separation, alignment, and cohesion, drawn as oriented triangles that steer smoothly and flee from the mouse cursor.
transcript · 6 messages
Create a full-screen flocking simulation of boids using separation, alignment, and cohesion, drawn as oriented triangles that steer smoothly and flee from the mouse cursor.
thinking
The user wants a single-page web app with a flocking boids simulation. Let me build this with: 1. Full-screen canvas 2. Boids algorithm with separation, alignment, cohesion 3. Oriented triangles for rendering 4. Mouse interaction (flee from cursor) 5. All in one index.html file with inline CSS and JS 6. No external resources Let me write a complete, polished implementation.
/tmp/ws/index.html (11048 bytes)Successfully wrote 11048 bytes to /tmp/ws/index.html
thinking
Let me verify the file was written correctly and exists.
{"command":"wc -l /tmp/ws/index.html && head -3 /tmp/ws/index.html && echo \"---\" && tail -3 /tmp/ws/index.html"}357 /tmp/ws/index.html <!DOCTYPE html> <html lang="en"> <head> --- </script> </body> </html>
thinking
The file is complete and well-formed. Let me summarize what was built.
Done — `/tmp/ws/index.html` (357 lines, fully self-contained). Here's what it includes: **Boids Algorithm:** - **Separation** — boids steer away from neighbors within 28px to avoid crowding - **Alignment** — boids match velocity with neighbors within 80px perception radius - **Cohesion** — boids steer toward the center of mass of nearby flockmates **Rendering:** - Oriented forward-pointing triangles (wings + tail notch shape) - Cyan-blue hue palette with per-boid variation - Dynamic size based on speed; glow effect via shadow blur - Subtle trail fade effect on dark background **Mouse Interaction:** - Hovering creates a visible influence circle (dashed red outline); boids inside flee outward proportional to proximity - Click triggers a burst scatter force that propagates outward and fades over time - Touch support included for mobile **Performance:** - Spatial hashing grid for O(n) neighbor lookups instead of O(n²) - `requestAnimationFrame` with capped delta time for smooth motion
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
Smooth flocking boids with glowing trails, continuous idle motion, reacts to mouse via scatter/flee circles.
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.