Boids flocking · grok-4.7
Output generated Cost / run $0.1648 Runtime 101.0s
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 · 23 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
I'm building a full-screen canvas flocking simulation with 150 boids drawn as oriented triangles.
I'll build a self-contained full-screen boids simulation and then check movement, pointer avoidance, and pause/resume in the browser.
/tmp/job-EaenQx/index.html (12121 bytes)Successfully wrote to /tmp/job-EaenQx/index.html
thinking
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK · 150\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
A cursor influence ring appears at the top left. The browser pointer may be at 0,0.
{"action":"motion","delta":700}Frame 1, +0ms
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Frame 2, +564ms
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Frame 3, +1131ms
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Frame 4, +1698ms
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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\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
Flocking looks good. Groups are forming and triangles point in the travel direction. A stray pointer ring appears at the top-left. I'll click inside a dense flock to test avoidance and then screenshot.
{"action":"drag","x":480,"y":200,"toX":900,"toY":420}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK · 150\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
{"action":"drag","x":900,"y":420,"toX":700,"toY":640}Frame 1, +1ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK · 150\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
The flock is splitting around the pointer. Boids are steering away from the ring.
{"action":"click","x":1043,"y":761}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK · 150\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nPaused\nResume\nReset","images":"attached"}
thinking
{"action":"motion","delta":500}Frame 1, +0ms
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Frame 2, +571ms
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Frame 3, +1133ms
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Frame 4, +1694ms
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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\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nPaused\nResume\nReset","images":"attached"}
thinking
{"action":"click","x":1088,"y":761}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\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
{"action":"motion","delta":400}Frame 1, +0ms
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Frame 2, +582ms
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Frame 3, +1150ms
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Frame 4, +1718ms
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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\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
{"action":"click","x":1148,"y":761}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"FLOCK · 150\n\nSeparation, alignment, and cohesion. Triangles point along travel. Pointer scatters boids inside the influence ring. Edges wrap.\n\nInfluence radius — boids steer away\nPaused flock is frozen in place\nRunning\nPause\nReset","images":"attached"}
thinking
Reset works. The population is fresh and scattered, and the state is Running.
The flocking simulation is in `index.html` and the checks I ran all passed. - Over several frames, the 150 triangles formed coordinated groups and pointed along their direction of travel. - Dragging the pointer into a group emptied the influence ring as nearby boids steered away. - Pause froze positions across later frames. Resume continued the same flock, and Reset scattered a fresh population of 150 and returned to Running. - The console showed only the sandbox warning, with no script errors. I did not resize the viewport in the browser, so the resize behavior is unverified visually.