Rotating icosahedron · qwen3.6-flash
Using the pre-provided three.min.js (global THREE), render a full-screen scene with a rotating icosahedron lit by two colored point lights, orbit-style auto-rotation, and a subtle starfield background.
transcript · 10 messages
Using the pre-provided three.min.js (global THREE), render a full-screen scene with a rotating icosahedron lit by two colored point lights, orbit-style auto-rotation, and a subtle starfield background.
thinking
The user wants a single-page web app using Three.js (already available as three.min.js) that renders: 1. Full-screen scene 2. Rotating icosahedron 3. Two colored point lights 4. Orbit-style auto-rotation 5. Subtle starfield background All in one index.html file, no external resources. Let me first check what's in the current directory to confirm three.min.js is there.
{"command":"ls /tmp/ws/three.min.js"}/tmp/ws/three.min.js
thinking
The file exists. Now I'll create the index.html with a full-screen icosahedron scene using THREE.js.
/tmp/ws/index.html (3822 bytes)Successfully wrote 3822 bytes to /tmp/ws/index.html
thinking
The user asked me to build a single-page web app with three.js rendering a rotating icosahedron. I've written the index.html file successfully. Let me verify it's present.
{"command":"ls -la /tmp/ws/index.html /tmp/ws/three.min.js"}-rw-r--r--. 1 node node 4406 Aug 1 18:01 /tmp/ws/index.html -rw-r--r--. 1 node node 603445 Aug 1 18:01 /tmp/ws/three.min.js
thinking
Wait, my write shows 3822 bytes but the ls shows 4406. Let me re-read to confirm what was actually written.
{"path":"/tmp/ws/index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Icosahedron Scene</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } html, body { width: 100%; height: 100%; overflow: hidden; background: #000; } canvas { display: block; } </style> </head> <body> <script src="three.min.js"></script> <script> (function() { // ── Renderer ────────────────────────────────────────────── const renderer = new THREE.WebGLRenderer({ antialias: true }); renderer.setSize(window.innerWidth, window.innerHeight); renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2)); document.body.appendChild(renderer.domElement); // ── Scene & Camera ──────────────────────────────────────── const scene = new THREE.Scene(); const camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 0.1, 1000); camera.position.z = 5; // ── Starfield Background ───────────────────────────────── function createStarfield(count) { const geo = new THREE.BufferGeometry(); const positions = new Float32Array(count * 3); const sizes = new Float32Array(count); for (let i = 0; i < count; i++) { const r = 80 + Math.random() * 200; const theta = Math.random() * Math.PI * 2; const phi = Math.acos(2 * Math.random() - 1); positions[i * 3] = r * Math.sin(phi) * Math.cos(theta); positions[i * 3 + 1] = r * Math.sin(phi) * Math.sin(theta); positions[i * 3 + 2] = r * Math.cos(phi); sizes[i] = 0.3 + Math.random() * 1.2; } geo.setAttribute('position', new THREE.BufferAttribute(positions, 3)); geo.setAttribute('size', new THREE.BufferAttribute(sizes, 1)); const mat = new THREE.PointsMaterial({ color: 0xffffff, sizeAttenuation: true, size: 0.5, transparent: true, opacity: 0.85 }); return new THREE.Points(geo, mat); } const stars = createStarfield(3000); scene.add(stars); // ── Icosahedron Mesh ────────────────────────────────────── const icoGeo = new THREE.IcosahedronGeometry(1.4, 1); const icoMat = new THREE.MeshStandardMaterial({ color: 0xaaaaaa, metalness: 0.7, roughness: 0.25, flatShading: true }); const icosahedron = new THREE.Mesh(icoGeo, icoMat); scene.add(icosahedron); // ── Point Lights ────────────────────────────────────────── const lightA = new THREE.PointLight(0xff3366, 40, 30); lightA.position.set(4, 3, 4); scene.add(lightA); const lightB = new THREE.PointLight(0x3399ff, 40, 30); lightB.position.set(-4, -2, 3); scene.add(lightB); // weak fill so nothing is pitch-black scene.add(new THREE.AmbientLight(0x222233, 0.5)); // ── Resize Handling ─────────────────────────────────────── window.addEventListener('resize', () => { camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize(window.innerWidth, window.innerHeight); }); // ── Animation Loop ──────────────────────────────────────── const clock = new THREE.Clock(); function animate() { requestAnimationFrame(animate); const t = clock.getElapsedTime(); // orbit-style rotation of the whole group icosahedron.rotation.x = t * 0.15; icosahedron.rotation.y = t * 0.25; // orbiting lights lightA.position.x = Math.cos(t * 0.6) * 4.5; lightA.position.z = Math.sin(t * 0.6) * 4.5; lightA.position.y = Math.sin(t * 0.4) * 2.5; lightB.position.x = Math.cos(t * 0.45 + Math.PI) * 4; lightB.position.z = Math.sin(t * 0.45 + Math.PI) * 4; lightB.position.y = Math.cos(t * 0.35) * 2; // subtle star drift stars.rotation.y = t * 0.005; renderer.render(scene, camera); } animate(); })(); </script> </body> </html>
thinking
The file has been written. Let me verify the content is correct and complete.
Done. The single-page app (`index.html`) is self-contained in `/tmp/ws/index.html` and includes: - **CSS** — inline `<style>` tag resetting margins, hiding overflow, filling the viewport with black - **Three.js** loaded via `<script src="three.min.js">` (local file, no CDN) - **Icosahedron** — `IcosahedronGeometry(1.4, 1)` with a metallic standard material and flat shading for crisp faceted look - **Two point lights** — pink (`0xff3366`) and blue (`0x3399ff`), both orbiting the icosahedron on sinusoidal paths so the lighting shifts dynamically - **Ambient fill** light at low intensity so shadows aren't pure black - **Starfield** — 3,000 randomly distributed points on a surrounding sphere with slight rotation over time - **Resize handling** — updates camera aspect ratio and renderer size on window resize
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
EVALUATION
Rotating icosahedron lit by pink/blue lights over a starfield, continuously animating and rotating with all inputs.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.