Boids flocking · muse-wonder
Output generated Cost / run $0.5317 Runtime 78.2s
Prompt for this run
Build a full-screen canvas flocking simulation with 150 boids drawn as oriented triangles. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Combine separation, alignment, and cohesion so nearby boids avoid crowding, align their headings, and form moving groups. Triangles point in their direction of travel. - Use bounded speed and steering so motion changes smoothly instead of teleporting. Wrap boids across screen edges. - Boids within a visible or documented cursor-influence radius steer away from the pointer. They resume flocking after the pointer moves away. - Provide Pause/Resume and Reset. Pause freezes simulation state; Reset restores a fresh population of 150 boids. - Fit the canvas to the viewport and keep the population and controls usable after resizing. Verify: Sample the flock at several moments to check coordinated movement and triangles pointing along their travel direction. Try the cursor interaction with available pointer actions, then pause and resume to check that the flock freezes and continues.
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
METRICS
Transcript · 22 messages
Build a full-screen canvas flocking simulation with 150 boids drawn as oriented triangles. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Combine separation, alignment, and cohesion so nearby boids avoid crowding, align their headings, and form moving groups. Triangles point in their direction of travel. - Use bounded speed and steering so motion changes smoothly instead of teleporting. Wrap boids across screen edges. - Boids within a visible or documented cursor-influence radius steer away from the pointer. They resume flocking after the pointer moves away. - Provide Pause/Resume and Reset. Pause freezes simulation state; Reset restores a fresh population of 150 boids. - Fit the canvas to the viewport and keep the population and controls usable after resizing. Verify: Sample the flock at several moments to check coordinated movement and triangles pointing along their travel direction. Try the cursor interaction with available pointer actions, then pause and resume to check that the flock freezes and continues.
thinking
Implementing a 150-boid canvas flocking simulation with UI controls and cursor repulsion while handling device pixel ratio and resizing.
index.html (13175 bytes)Successfully wrote to index.html
thinking
{"action":"inspect"}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n—\nFPS\n—\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"motion"}{"action":"click","x":600,"y":400}Frame 1, +0ms
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Frame 2, +596ms
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Frame 3, +1184ms
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Frame 4, +1779ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n2.74\nFPS\n60\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n2.79\nFPS\n60\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"click","x":1035,"y":38}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nPAUSED\nAVG SPEED\n2.92\nFPS\n0 (PAUSED)\n▶ Resume\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"motion"}Frame 1, +0ms
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Frame 2, +615ms
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Frame 3, +1240ms
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Frame 4, +1876ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nPAUSED\nAVG SPEED\n2.92\nFPS\n0 (PAUSED)\n▶ Resume\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"click","x":1035,"y":38}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n2.92\nFPS\n0 (PAUSED)\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"drag","x":300,"y":500,"toX":700,"toY":350}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n2.95\nFPS\n60\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"action":"click","x":1140,"y":38}Frame 1, +0ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK / 150 BOIDS\n\nSeparation avoids crowding · Alignment matches neighbours' headings · Cohesion pulls toward the local centre. Move the pointer — boids inside the 120 px cursor radius (shown as a ring) steer away, then resume flocking.\n\nBOIDS\n150\nSTATE\nRUNNING\nAVG SPEED\n2.95\nFPS\n60\n⏸ Pause\n↺ Reset\nSeparation\nAlignment\nCohesion\n○ Cursor influence · 120 px\nSpace = Pause · R = Reset","images":"attached"}
thinking
{"command":"ls -lh index.html && grep -E \"https?://|src=|href=|@import|url\\(\" index.html || echo \"no external refs found\""}-rw-r--r-- 1 node node 13K Oct 15 04:04 index.html no external refs found
thinking
Created `index.html` — a self-contained, full-screen canvas flocking simulation (no external assets/CDNs). **Implemented:** - 150 boids as oriented triangles rotated via `atan2(vy, vx)` so they point along travel direction - Separation (30px), alignment + cohesion (62px perception, toroidal distance for edge coherence), weighted and combined - Bounded speed (1.9–3.4) and clamped steering force for smooth motion; wrap-around on all edges - Cursor repulsion within a visible/documented 120px ring (dashed red circle + HUD/legend), flocking resumes after pointer leaves - Pause/Resume and Reset buttons (plus Space/R shortcuts), live HUD (count, state, avg speed, FPS), `window.__flock` sampling API - Canvas fits viewport with DPR handling and re-wraps/clamps boids on resize **Verified in browser:** - Initial render: 150 boids, HUD/controls usable, 60 FPS - Motion sampling over several frames: boids formed coordinated moving groups with triangles aligned to their headings - Pointer click/drag at centre: ring rendered, boids cleared/steered away from the radius - Pause: state showed PAUSED, motion frames were identical (frozen); Resume restored movement - Reset: fresh randomly distributed population of 150 restored **Not verified:** actual window-resize behaviour (no resize action available in the browser tool — code path reviewed only), and long-term flock stability beyond a few seconds of sampling.