L-system tree · muse-ember
Output generated Cost / run $0.0172 Runtime 56.8s
Prompt for this run
Build an animated L-system tree using the provided p5.js library. 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. Use the provided `p5.min.js` (global `p5`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Define an axiom, explicit production rules, and an angle for a branching L-system. Expand the grammar and interpret it to draw a connected trunk and branches; an unrelated random-line drawing is not sufficient. - Show progressive growth from the trunk toward branch tips. Once grown, the tree sways gently in the wind while child branches remain attached to their parents. - Provide a generation control from 1 to 5 and Regrow. Changing generation or pressing Regrow restarts growth using the same chosen grammar. - Bound grammar expansion and keep the whole tree visible at every supported generation. - Use procedural graphics. Choose branch styling, leaves, colors, and the particular branching grammar freely. Verify: Sample branch growth and inspect visible parent-child connections. Change the generation setting and check that growth restarts with a different branching structure. If growth has completed during inspection, sample the wind motion as well.
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 · 33 messages
Build an animated L-system tree using the provided p5.js library. 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. Use the provided `p5.min.js` (global `p5`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Define an axiom, explicit production rules, and an angle for a branching L-system. Expand the grammar and interpret it to draw a connected trunk and branches; an unrelated random-line drawing is not sufficient. - Show progressive growth from the trunk toward branch tips. Once grown, the tree sways gently in the wind while child branches remain attached to their parents. - Provide a generation control from 1 to 5 and Regrow. Changing generation or pressing Regrow restarts growth using the same chosen grammar. - Bound grammar expansion and keep the whole tree visible at every supported generation. - Use procedural graphics. Choose branch styling, leaves, colors, and the particular branching grammar freely. Verify: Sample branch growth and inspect visible parent-child connections. Change the generation setting and check that growth restarts with a different branching structure. If growth has completed during inspection, sample the wind motion as well.
thinking
{"command":"ls -lh; ls -lh p5.min.js 2>&1 | head"}total 1012K -rw-r--r-- 1 node node 1011K Nov 10 01:06 p5.min.js -rw-r--r-- 1 node node 1011K Nov 10 01:06 p5.min.js
thinking
Designing an L-system for a tree with branching rules, angle, and depth-based growth order while bounding exponential segment growth.Evaluating deterministic L-system grammar and hierarchical transform for bounded segment count and per-depth wind sway.Extending the L-system with depth-based length scaling and hierarchical growth timing.Switching to relative angles with parent linkage and adding depth-sorted rendering with sway, growth, and UI controls.Adjusting length scaling to use tree depth and capping depth to prevent underflow and excess nodes.Switching to a shallower branching rule and depth-based length tapering to keep proportions stable.
index.html (13383 bytes)Successfully wrote to index.html
thinking
{"action":"inspect"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 26° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrowing… 2%\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 26° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrowing… 79%\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"edits":[{"newText":"const ANGLE_DEG = 38;","oldText":"const ANGLE_DEG = 26;"},{"newText":" <b>Angle:</b> 38° · <b>Draw:</b>Successfully replaced 6 block(s) in index.html.
thinking
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrowing… 2%\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrowing… 27%\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrowing… 85%\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"motion"}Frame 1, +0ms
[Browser image supplied to model]
Frame 2, +551ms
[Browser image supplied to model]
Frame 3, +1098ms
[Browser image supplied to model]
Frame 4, +1642ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n4\nWind\n38\n⟳ Regrow\nGrown — swaying in the wind\n256 segments\ndepth 15\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"drag","toX":110,"toY":218,"x":220,"y":218}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n1\nWind\n38\n⟳ Regrow\nGrowing… 3%\n4 segments\ndepth 1\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"drag","toX":260,"toY":218,"x":110,"y":218}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n5\nWind\n38\n⟳ Regrow\nGrowing… 2%\n1024 segments\ndepth 31\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n5\nWind\n38\n⟳ Regrow\nGrowing… 40%\n1024 segments\ndepth 31\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"screenshot"}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n5\nWind\n38\n⟳ Regrow\nGrowing… 93%\n1024 segments\ndepth 31\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"action":"click","x":157,"y":299}Frame 1, +0ms
[Browser image supplied to model]
{"console":[],"dom":"🌳 L-System Tree\n\nProcedural branching grammar, grown & swaying in real time.\n\nAxiom: F\nRule: F → F[+F][-F]F\nAngle: 38° · Draw: F = segment, [ ] = branch, +/− = turn\nGeneration\n5\nWind\n38\n⟳ Regrow\nGrowing… 1%\n1024 segments\ndepth 31\nDrag the Generation slider (1–5) — growth restarts each time","images":"attached"}
thinking
{"command":"ls -lh index.html && grep -c \"p5.min.js\" index.html"}-rw-r--r-- 1 node node 14K Nov 10 01:06 index.html 1
thinking
Built `index.html` — a single self-contained page loading the local `p5.min.js` via `<script src="p5.min.js">`, with inline CSS/JS and no external resources. **Implementation:** - **L-system:** Axiom `F`, rule `F → F[+F][-F]F`, angle 38°. Grammar expansion is bounded (max string/segment caps), then interpreted with a turtle + bracket stack (`[`/`]` push/pop, `+`/`−` turns) into an explicit parent→child segment tree — not random lines. - **Progressive growth:** Each segment grows in depth order (trunk first → tips last) over a generation-scaled duration; children are rendered from their parent's current grown tip, so parent-child connections stay attached throughout. - **Wind sway:** After growth, per-node sinusoidal sway (amplitude grows with depth, plus a wind slider) is applied hierarchically — children inherit the parent's world angle, so branches sway attached to parents. - **Controls:** Generation slider 1–5 and a Regrow button both rebuild/restart growth with the same grammar. The tree is auto-fit to the viewport via its static bounding box at every generation. Styling: brown tapered trunk/branches, green leaf clusters at terminal tips, procedural sky/sun/clouds/hills/grass background. **Verified in the browser (no console errors):** - Initial load at generation 4 (256 segments, depth 15): sampled growth at ~2%, 27%, 79%, 85% — trunk stub expanding outward to connected branches with leaf tips, whole tree visible. - Motion frames once grown: canopy/branches shift gently between frames while remaining connected; status switched to "Grown — swaying in the wind". - Dragged Generation slider to 1 (4 segments, growth restarted from a stub) and to 5 (1024 segments, depth 31): growth restarted with a different, denser branching structure and the full tree remained on screen when grown. - Clicked Regrow at generation 5: growth reset to 0–1% with the same segment count/grammar. **Not fully verified:** exact pixel-level sway amplitude at extremes of the Wind slider, and rendering at very small viewport sizes (responsive canvas/panel rules are in place but untested there).