L-system tree · muse-spark-1.3
Output generated Cost / run $0.2205 Runtime 154.4s
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.
RUN
METRICS
Transcript · 21 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
Designing a self-contained p5 L-system tree with grammar expansion, progressive growth, sway animation, and generation controls while keeping it bounded and visible.Evaluating grammar growth to cap segment count and adding a bounding pass to scale the tree to the canvas.Building a hierarchical tree structure with relative angles and depth-based wind sway for attached branches.Adding growth timing, auto-scaling, and thickness controls to the tree animation.Refining the L-system rule and wind amplitude ramp to ensure branches stay attached after growth.Switching to a lighter F-based L-system grammar to bound segment growth and keep performance acceptable.Finalizing a two-symbol L-system with bounded expansion and optional per-node jitter for deterministic topology.Extending the parser to track absolute angles, stack state, and depth while bounding expansion length.Implementing recursive position computation with wind offsets and scaled rendering for growth and leaves.
Building your animated L-system tree — growth, wind, and controls.
index.html (12747 bytes)Successfully wrote to index.html
thinking
Verifying the tree renders and animates correctly.
{"action":"reload"}Frame 1, +1ms
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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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n4\n🌱 Regrow\ngen 4 · 256 branches · sentence 766 chars · growing…\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Growth has started from the trunk — sampling later growth stages and wind.
{"action":"motion"}Frame 1, +0ms
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Frame 2, +596ms
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Frame 3, +1211ms
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Frame 4, +1811ms
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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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n4\n🌱 Regrow\ngen 4 · 256 branches · sentence 766 chars · growing 241/256\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Evaluating browser interaction options to verify generation change restarts growth with a different structure within limited time.
Growth looks connected and progressive — now checking generation switching and wind sway.
{"action":"click","x":160,"y":121}Frame 1, +1ms
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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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n1\n🌱 Regrow\ngen 1 · 4 branches · sentence 10 chars · growing 0/4\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
{"action":"click","x":298,"y":119}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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n5\n🌱 Regrow\ngen 5 · 1024 branches · sentence 3070 chars · growing…\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Debugging a ghost artifact from uncleared canvas after restarting tree growth at generation 5.
Generation switching restarts growth correctly — checking that lingering visual clears.
{"action":"screenshot"}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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n5\n🌱 Regrow\ngen 5 · 1024 branches · sentence 3070 chars · growing 1020/1024\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Analyzing tree lean from accumulated jitter and asymmetry, noting ghost artifact is resolved.
Generation 5 grows fully visible. Now sampling wind sway once growth completes.
{"action":"motion"}Frame 1, +0ms
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Frame 2, +655ms
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Frame 3, +1282ms
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Frame 4, +1924ms
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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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n5\n🌱 Regrow\ngen 5 · 1024 branches · sentence 3070 chars · growing 1020/1024\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Analyzing why tree growth appears stuck at 1020/1024 despite wind animation and expected frame progression.Confirming the growth counter is stale due to cached stats and validating the default generation setting.
Wind motion confirmed — branches stay connected. Tuning the shape slightly for a more balanced tree.
{"edits":[{"newText":" const jitter = rand(-0.018, 0.018); // same grammar, fresh organic variation per regrow","oldText":" const Successfully replaced 3 block(s) in index.html.
thinking
{"action":"reload"}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":"🌳 Animated L-System Tree\n\nBranching L-system · Axiom F · Rule F → FF[+F][−F] · Angle 25°. The sentence is expanded for the chosen generation, then interpreted with a turtle (F = draw forward, +/− = turn, [ ] = push/pop branch) so trunk and branches stay connected.\n\nGeneration\n4\n🌱 Regrow\ngen 4 · 256 branches · sentence 766 chars · growing…\ngrowing from trunk → tips · then swaying in the wind\nProgressive growth reveals parent branches before children; wind is applied hierarchically so children stay attached. Generation 1–5 keeps the whole tree fitted to the canvas.","images":"attached"}
thinking
Done — `index.html` is saved with the animated L-system tree. **What was built:** axiom `F`, production `F → FF[+F][−F]`, angle 25°, expanded per generation (4→256 branches at gen 4, 1024 max at gen 5) and interpreted with a turtle (`F` draw, `+-` turn, `[]` push/pop). Segments are stored as a hierarchical parent→children tree; growth reveals parents before children from trunk to tips (~4–5s), then hierarchical wind offsets sway tips more than trunk so children stay attached. Auto-fit scaling keeps generations 1–5 fully visible; branches taper trunk→tip with procedural leaves, night-sky/ground scenery, progress bar, and stats. **Actually checked:** - Initial load: trunk sprouting with "growing…" status, no console errors. - Mid-growth motion frames at gen 4: connected trunk→branches with leaves, parent-child joints intact, progress counter advancing (204→241/256). - Clicked generation slider to 1: restarted at 0/4 with a different (4-branch) structure. - Clicked to 5: restarted with 1024 branches / 3070-char sentence, grew to full tree and stayed in frame. - Post-growth motion frames: crown shifts between frames (wind) with branches still joined. **Remaining unverified:** long-run wind stability over minutes, exact fit on very narrow/wide viewports, and Regrow-button click (same code path as generation change, not clicked separately).