Rotating icosahedron · minimax-m2.1
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 me to create a single-page web app with Three.js that includes: 1. A rotating icosahedron 2. Two colored point lights 3. Orbit-style auto-rotation 4. A subtle starfield background I need to use the pre-provided three.min.js file. Let me first check what's in the current directory to see the file.
{"command":"ls -la /tmp/ws/"}total 592 drwxr-sr-x. 2 node node 26 Aug 1 20:51 . drwxrwsrwx. 3 root node 16 Aug 1 20:51 .. -rw-r--r--. 1 node node 603445 Aug 1 20:51 three.min.js
thinking
Good, the three.min.js file is present. Now I'll create the index.html file with: 1. A full-screen Three.js scene 2. A rotating icosahedron (IcosahedronGeometry) 3. Two colored point lights (e.g., warm orange/red and cool blue/cyan) 4. Orbit-style auto-rotation (autoRotate on OrbitControls or manual camera rotation) 5. A subtle starfield background (points/particles scattered in the background) Let me write a complete self-contained HTML file.
/tmp/ws/index.html (4686 bytes)Successfully wrote 4686 bytes to /tmp/ws/index.html
thinking
I've created the index.html file with all the required features: 1. A full-screen Three.js scene 2. A rotating icosahedron with flat shading 3. Two colored point lights (warm orange/coral and cool cyan/blue) 4. Orbit-style auto-rotation of the camera around the scene 5. A subtle starfield background with 1500 stars Let me verify the file exists and check if there are any obvious issues.
{"command":"ls -la /tmp/ws/"}total 600 drwxr-sr-x. 2 node node 44 Aug 1 20:51 . drwxrwsrwx. 3 root node 16 Aug 1 20:51 .. -rw-r--r--. 1 node node 4686 Aug 1 20:51 index.html -rw-r--r--. 1 node node 603445 Aug 1 20:51 three.min.js
thinking
The file is created. Let me do a quick syntax check to make sure there are no obvious JavaScript errors. Since this is a simple HTML file, I'll just verify the structure is correct.
{"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>Rotating Icosahedron</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } body { overflow: hidden; background: #000; } canvas { display: block; } </style> </head> <body> <script src="three.min.js"></script> <script> // Scene setup const scene = new THREE.Scene(); // Camera const camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 1000 ); camera.position.z = 5; // 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); // Icosahedron const icoGeometry = new THREE.IcosahedronGeometry(1.5, 0); const icoMaterial = new THREE.MeshStandardMaterial({ color: 0x44aa88, roughness: 0.3, metalness: 0.6, flatShading: true }); const icosahedron = new THREE.Mesh(icoGeometry, icoMaterial); scene.add(icosahedron); // Point Light 1 - Warm color (orange/coral) const light1 = new THREE.PointLight(0xff6b35, 80, 20); light1.position.set(3, 2, 3); scene.add(light1); // Point Light 2 - Cool color (cyan/blue) const light2 = new THREE.PointLight(0x00d4ff, 80, 20); light2.position.set(-3, -2, 3); scene.add(light2); // Ambient light for base illumination const ambientLight = new THREE.AmbientLight(0x222233, 0.5); scene.add(ambientLight); // Starfield background const starCount = 1500; const starGeometry = new THREE.BufferGeometry(); const starPositions = new Float32Array(starCount * 3); for (let i = 0; i < starCount * 3; i += 3) { const radius = 30 + Math.random() * 70; const theta = Math.random() * Math.PI * 2; const phi = Math.acos(2 * Math.random() - 1); starPositions[i] = radius * Math.sin(phi) * Math.cos(theta); starPositions[i + 1] = radius * Math.sin(phi) * Math.sin(theta); starPositions[i + 2] = radius * Math.cos(phi); } starGeometry.setAttribute('position', new THREE.BufferAttribute(starPositions, 3)); const starMaterial = new THREE.PointsMaterial({ color: 0xffffff, size: 0.15, sizeAttenuation: true, transparent: true, opacity: 0.8 }); const stars = new THREE.Points(starGeometry, starMaterial); scene.add(stars); // Orbit controls (using manual rotation for auto-rotate effect) let autoRotateAngle = 0; const autoRotateSpeed = 0.003; const cameraRadius = 5; // Handle window resize window.addEventListener('resize', () => { camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize(window.innerWidth, window.innerHeight); }); // Animation loop function animate() { requestAnimationFrame(animate); // Rotate icosahedron on its own axis icosahedron.rotation.x += 0.005; icosahedron.rotation.y += 0.008; // Orbit-style auto-rotation of camera autoRotateAngle += autoRotateSpeed; camera.position.x = Math.sin(autoRotateAngle) * cameraRadius; camera.position.z = Math.cos(autoRotateAngle) * cameraRadius; camera.position.y = Math.sin(autoRotateAngle * 0.5) * 1.5; camera.lookAt(0, 0, 0); // Subtle starfield rotation stars.rotation.y += 0.0001; stars.rotation.x += 0.00005; // Animate lights slightly const time = Date.now() * 0.001; light1.position.y = 2 + Math.sin(time * 0.7) * 0.5; light2.position.y = -2 + Math.cos(time * 0.5) * 0.5; renderer.render(scene, camera); } animate(); </script> </body> </html>
thinking
The file looks good. It contains: 1. **Rotating icosahedron** - Using IcosahedronGeometry with flat shading and MeshStandardMaterial for nice lighting response 2. **Two colored point lights** - A warm orange/coral light (0xff6b35) and a cool cyan/blue light (0x00d4ff) with subtle animation 3. **Orbit-style auto-rotation** - The camera orbits around the scene using trigonometric functions 4. **Subtle starfield background** - 1500 stars distributed on a sphere around the scene using BufferGeometry The code is complete and self-contained. It uses the three.min.js file that was already present in the directory.
Done! I've created a self-contained `index.html` with: - **Rotating icosahedron** — Green metallic icosahedron with flat shading, rotating on X and Y axes - **Two colored point lights** — Warm orange (0xff6b35) and cool cyan (0x00d4ff) lights that subtly animate up/down - **Orbit-style auto-rotation** — Camera automatically orbits around the icosahedron with a gentle vertical oscillation - **Subtle starfield background** — 1500 stars distributed on a distant sphere, rotating very slowly for atmosphere The scene also includes: - Ambient light for base illumination - Responsive resize handling - Smooth 60fps animation loop
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 with cyan/yellow point lights and faint starfield; reacts to drag/wheel/keys by rotating or changing lighting angle.
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.