L-system tree · qwen3.6-35b-a3b
Output generated Cost / run $0.0042 Runtime 54.4s
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 · 9 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
The user wants me to build an animated L-system tree using p5.js. Let me first check what files are available in the current directory, then build the application. Key requirements: 1. L-system with axiom, production rules, and angle 2. Progressive growth from trunk to branch tips 3. Tree sways in wind with child branches attached 4. Generation control (1-5) and Regrow button 5. Keep tree visible at all generations 6. Procedural graphics (styling, leaves, colors, grammar) 7. Use p5.min.js from current directory via script tag Let me start by checking the directory and then build the complete index.html.
{"command":"ls /tmp/job-V2wVBk/"}p5.min.js
thinking
Good, p5.min.js is available. Now let me build the complete index.html with the L-system tree animation. Let me design the L-system: - Axiom: "F" - Production rules: F -> FF+[++F--F]-[--F++F]F (a common fractal tree, but I'll simplify for growth) - Actually, let me use a simpler but visually interesting one: - Axiom: "F" - F -> FF+[++F--F]-[--F++F]F - Angle: 25 degrees For progressive growth, I'll draw segments one at a time rather than all at once. For wind sway, I'll add a sine-based rotation that compounds from parent to child branches. Let me build this step by step. Key design decisions: 1. L-system grammar: F -> F[+F]F[-F]F (simple but effective branching) 2. Progressive growth: Draw N segments per frame, starting from the beginning 3. Wind: Apply a sine-based rotation to each branch based on its depth and time 4. Styling: Brown gradient branches, green leaves, maybe flowers Let me write the complete index.html.
/tmp/job-V2wVBk/index.html (11568 bytes)Successfully wrote to /tmp/job-V2wVBk/index.html
thinking
Now let me test the application by opening it in the browser and checking the behavior.
{"action":"screenshot"}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":"Generation: \n1\n2\n3\n4\n5\nRegrow\nF → F[+F]F[-F]F","images":"attached"}
thinking
The app is working - I can see the tree growing with branches. Let me verify the key behaviors: 1. The tree is growing from bottom to top (trunk first, then branches) - good 2. The production rule is F → F[+F]F[-F]F - good 3. Generation controls 1-5 and Regrow button are visible 4. The tree appears to have parent-child connections (branches connected to trunk/other branches) Let me check a few things: - Does generation change work? (need to test by changing generation and pressing Regrow) - Does wind swaying work? (need to check after growth completes) - Is the whole tree visible at every generation? Let me test changing generation to 1, then 5, and check visibility. Also test wind after growth completes.
Let me inspect the tree at different generations to verify the behavior.