Bouncing balls in a heptagon · qwen3.6-35b-a3b
Show 20 numbered balls (1 to 20) dropping from the center of a heptagon that spins 360 degrees every 5 seconds. The balls are affected by gravity and friction, collide with each other, and bounce realistically off the rotating walls; show each ball's spin via the rotation of its number. Implement all collision detection yourself.
transcript · 6 messages
Show 20 numbered balls (1 to 20) dropping from the center of a heptagon that spins 360 degrees every 5 seconds. The balls are affected by gravity and friction, collide with each other, and bounce realistically off the rotating walls; show each ball's spin via the rotation of its number. Implement all collision detection yourself.
thinking
The user wants a single HTML file with: 1. A heptagon (7-sided polygon) that spins 360° every 5 seconds 2. 20 numbered balls (1-20) dropping from the center 3. Physics: gravity, friction, ball-ball collisions, ball-wall collisions with the rotating heptagon 4. Balls show their spin via rotation of the number 5. All collision detection implemented from scratch 6. No external resources Let me build this with Canvas and implement: - Rotating heptagon collision detection - Ball-ball elastic collisions - Ball-wall collisions with the rotating container - Gravity and friction - Number rendering on balls show spin I'll use requestAnimationFrame for the animation loop and implement proper physics.
/workspace/index.html (11169 bytes)Successfully wrote 11169 bytes to /workspace/index.html
thinking
The file has been written. Let me verify it exists and is complete.
{"command":"wc -l /workspace/index.html && head -5 /workspace/index.html && echo \"---\" && tail -5 /workspace/index.html"}443 /workspace/index.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> --- requestAnimationFrame(animate); </script> </body> </html>
thinking
The file is written and complete. Let me provide a summary of what was built.
Done! `/workspace/index.html` is a fully self-contained single-file web app (443 lines, no external dependencies). **What it features:** - **Spinning heptagon** — a 7-sided container that completes a full 360° rotation every 5 seconds, drawn with a cyan glow effect and vertex markers. - **20 numbered balls** (1–20) spawned in a circle at the center, each with a vibrant color. - **Gravity & friction** — balls fall under gravity (600 px/s²) with air friction damping. - **Ball-ball collisions** — elastic collisions with overlap separation, using proper momentum exchange based on equal mass. - **Ball-wall collisions** — each edge of the rotating heptagon is checked; the wall's tangential velocity (from rotation) is added to the collision response, so balls get "thrown" by the spinning walls. Includes friction and bounce restitution (0.7). - **Spin visualization** — each ball's number rotates to show angular velocity. A faint spoke/line from center to edge makes the rotation unmistakable. Angular velocity is transferred from tangential friction during collisions. - **Sub-stepping** — 8 physics sub-steps per frame for stability. - **Particle effects** — tiny particles spawn on fast-moving balls. Just open the file in any browser to watch it run.
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
Heptagon spins with numbered balls falling and piling under gravity, but balls cluster in a heap without much collision spread.
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.