L-system tree · qwen3-vl-30b-a3b-instruct
Output saved · Timed out Cost / run $0.0064 Runtime 900.1s
The 15-minute session limit cut this run off. The output is the HTML saved at that point.
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 · 14 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.
I'll create an animated L-system tree using p5.js. Let me build a self-contained index.html file with the required functionality.
index.html (4271 bytes)Successfully wrote to index.html
I've created an animated L-system tree using p5.js. Let me check the functionality:
{"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":"Generation: Regrow","images":"attached"}
I see the initial state of the application. The tree is visible but very small at the bottom center. Let me check the functionality by interacting with the controls and observing the changes:
{"action":"click","x":120,"y":40}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: Regrow","images":"attached"}
I see that the tree is not growing as expected. Let me check the code and fix the issue with the tree rendering. The problem might be in how the tree is being drawn or how the instructions are being processed. Let me make some adjustments to the code to ensure the tree grows properly
{"path":"index.html","edits":[{"oldText":"function drawTree() {\n let x = 0;\n let y = 0;\n let angle = -PI / 2; // Start poiNo changes made to index.html. The replacement produced identical content. This might indicate an issue with special characters or the text not existing as expected.
I need to make sure the code is properly formatted. Let me check the current content of the file and make sure I'm editing the correct section:
{"path":"index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Animated L-system Tree</title> <script src="p5.min.js"></script> <style> body { margin: 0; overflow: hidden; background-color: #87CEEB; } .controls { position: absolute; top: 10px; left: 10px; z-index: 100; background: rgba(255, 255, 255, 0.8); padding: 10px; border-radius: 5px; font-family: Arial, sans-serif; } button { margin: 5px; padding: 8px 12px; cursor: pointer; } input[type="range"] { width: 100px; } </style> </head> <body> <div class="controls"> <label>Generation: <input type="range" id="generation" min="1" max="5" value="1"></label> <button id="regrow">Regrow</button> </div> <script> let axiom = "F"; let rules = { "F": "F[-F]F[+F]F" }; let angle = 25; let generation = 1; let instructions = []; let tree = []; let windAngle = 0; let windSpeed = 0.01; let windDirection = 1; function setup() { createCanvas(1200, 800); background(135, 206, 235); regrow(); } function draw() { background(135, 206, 235); translate(width / 2, height); stroke(139, 69, 19); // brown strokeWeight(2); // Apply wind effect windAngle += windSpeed * windDirection; if (windAngle > 0.2 || windAngle < -0.2) { windDirection *= -1; } // Draw the tree drawTree(); } function drawTree() { let x = 0; let y = 0; let angle = -PI / 2; // Start pointing up let stack = []; let currentBranch = { x1: x, y1: y, x2: x, y2: y, angle: angle }; for (let i = 0; i < instructions.length; i++) { let c = instructions[i]; if (c === 'F') { // Draw a line segment let x2 = currentBranch.x2 + 10 * cos(currentBranch.angle); let y2 = currentBranch.y2 + 10 * sin(currentBranch.angle); line(currentBranch.x2, currentBranch.y2, x2, y2); // Create new branch let newBranch = { x1: currentBranch.x2, y1: currentBranch.y2, x2: x2, y2: y2, angle: currentBranch.angle }; // Add to tree array for potential leaf drawing tree.push(newBranch); // Update current branch currentBranch = newBranch; } else if (c === '+') { currentBranch.angle += radians(angle); } else if (c === '-') { currentBranch.angle -= radians(angle); } else if (c === '[') { stack.push({ x: currentBranch.x2, y: currentBranch.y2, angle: currentBranch.angle }); } else if (c === ']') { let last = stack.pop(); currentBranch = { x1: last.x, y1: last.y, x2: last.x, y2: last.y, angle: last.angle }; } } // Draw leaves at branch tips for (let branch of tree) { fill(34, 139, 34); // green ellipse(branch.x2, branch.y2, 5, 5); } } function generateInstructions() { let result = axiom; for (let i = 0; i < generation; i++) { let newResult = ''; for (let j = 0; j < result.length; j++) { let c = result[j]; if (rules[c]) { newResult += rules[c]; } else { newResult += c; } } result = newResult; } return result; } function regrow() { generation = int(document.getElementById('generation').value); instructions = generateInstructions().split(''); tree = []; windAngle = 0; windDirection = 1; } // Set up event listeners document.getElementById('generation').addEventListener('input', function() { regrow(); }); document.getElementById('regrow').addEventListener('click', function() { regrow(); }); </script> </body> </html>
I see that the code is already correct. The issue might be with the initial rendering. Let me check if the tree is growing properly by interacting with the controls and observing the changes. Let me try increasing the generation to see if the tree grows properly:
{"action":"click","x":140,"y":40}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: Regrow","images":"attached"}