Boids flocking · muse-ember
Output generated Cost / run $0.0062 Runtime 28.3s
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.
METRICS
Transcript · 18 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
index.html (11275 bytes)Successfully wrote to index.html
thinking
{"action":"reload"}Frame 1, +0ms
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{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n⏸ Pause\n↺ Reset (150)\nPopulation 150\nStatus Running\nFPS —\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset","images":"attached"}
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{"action":"motion"}{"action":"click","x":65,"y":105}Frame 1, +0ms
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Frame 2, +561ms
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Frame 3, +1126ms
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Frame 4, +1729ms
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{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n⏸ Pause\n↺ Reset (150)\nPopulation 150\nStatus Running\nFPS 60\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset","images":"attached"}
Frame 1, +0ms
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{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n▶ Resume\n↺ Reset (150)\nPopulation 150\nStatus Paused\nFPS 60\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset\n\n⏸ PAUSED","images":"attached"}
thinking
{"action":"click","x":65,"y":105}Frame 1, +0ms
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{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n⏸ Pause\n↺ Reset (150)\nPopulation 150\nStatus Running\nFPS 60\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset","images":"attached"}
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{"action":"drag","x":900,"y":400,"toX":700,"toY":400}Frame 1, +0ms
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{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n⏸ Pause\n↺ Reset (150)\nPopulation 150\nStatus Running\nFPS 60\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset","images":"attached"}
thinking
{"action":"click","x":245,"y":105}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"BOIDS · FLOCKING\n\n150 oriented triangles using separation, alignment & cohesion (Reynolds rules).\n\n⏸ Pause\n↺ Reset (150)\nPopulation 150\nStatus Running\nFPS 60\nSeparation 1.5\nAlignment 1.0\nCohesion 1.0\nCursor-influence radius 120 px\n\nCursor influence: boids within the dashed circle (radius above, drawn around the pointer) steer away from it and resume flocking when the pointer moves away. Space pause · R reset","images":"attached"}
thinking
{"command":"ls -lh index.html && grep -c \"http\" index.html || true"}-rw-r--r-- 1 node node 12K Nov 10 01:07 index.html 0
thinking
Built and verified `index.html` (single self-contained file, no external resources): - **Flocking:** 150 boids with Reynolds separation/alignment/cohesion (wrapped neighbour distances), bounded min/max speed, limited steering force for smooth motion, and edge wrapping. Triangles are rotated by `atan2(vy,vx)` so the tip points along travel — confirmed in motion frames where groups move coherently and trail behind their tips. - **Cursor influence:** Boids inside a visible dashed circle (default 120px, adjustable slider, documented in the panel) steer away; flocking resumes when the pointer leaves. Verified by dragging the pointer to centre — circle/label appeared and nearby boids steered out. - **Pause/Resume & Reset:** Pause button (also `Space`) freezes state — verified status changed to Paused, banner shown, and Resume restored motion. Reset (also `R`) restores a fresh scattered population of 150, verified visually. - **Viewport fit:** Canvas resizes to `innerWidth/innerHeight` with DPR handling and redraw on resize; control panel remains usable. **Checked:** initial render, ~3s motion sampling (coordinated movement/orientation), pause → resume, pointer-drag influence, reset, console (no errors), FPS ~60. **Remaining unverified:** actual window-resize event resizing (code present, not manually resized in the 1200×800 harness) and touch input (code present, not exercised).