Rotating icosahedron · nemotron-3-super-120b-a12b
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.
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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
We need to create index.html that loads three.min.js (already present) and builds a scene with: - Full-screen scene (canvas fills window) - Rotating icosahedron (geometry: IcosahedronBufferGeometry) - Two colored point lights (e.g., red and blue) orbiting maybe? Or "orbit-style auto-rotation": likely the camera or lights orbit? Probably the icosahedron rotates, and also lights orbit? It says "orbit-style auto-rotation": maybe the camera orbits around the scene, or the lights orbit. - Subtle starfield background: could be a points sprite with many vertices, or a texture? Since we cannot load external textures, we can generate a starfield using Points geometry with random vertices and white color. We'll need to include three.min.js via <script src="three.min.js"></script>. We'll write HTML with style to set body margin 0, overflow hidden, canvas display block. JS: set up scene, camera (PerspectiveCamera), renderer (WebGLRenderer) set size to window innerWidth/Height, append to body. Create icosahedron: new THREE.IcosahedronGeometry(radius, detail). Use MeshStandardMaterial maybe with some color, flat shading? We'll use MeshPhongMaterial. Add to scene. Two point lights: create PointLight with color e.g., 0xff0000 and 0x0000ff, intensity maybe 1, distance 0. Add to scene. We need orbit-style auto-rotation: we can make the lights orbit around the icosahedron over time, or make the camera orbit. Let's do camera orbit: use spherical coordinates that change over time. Starfield: create a Points geometry with many vertices (say 5000) random positions within a sphere radius maybe 1000, small size. We'll use PointsMaterial with color white, size maybe 2, sizeAttenuation false? Actually for starfield we want constant size regardless of distance; set sizeAttenuation false. Make sure to set renderer.setPixelRatio(window.devicePixelRatio). Add animation loop: rotate icosahedron slightly each frame, update light positions (orbit), update camera position (orbit), render. Handle window resize. Now write index.html. First check if three.min.js exists. Let's list directory. We'll use bash to ls.
{"command":"ls -la"}total 644 drwxrwxrwx 3 node node 96 Jul 22 16:55 . drwxr-xr-x 1 root root 4096 Jul 22 16:55 .. -rw-r--r-- 1 node node 603445 Jul 22 16:55 three.min.js
thinking
Now create index.html. We'll write the content. Let's create the file with write. But first maybe we can read three.min.js to confirm it's there? Not needed. We'll write index.html. Proceed.
/index.html (3561 bytes)EROFS: read-only file system, open '/index.html'
thinking
We got EROFS trying to write to root. Need to write to current directory /workspace. Let's adjust path: "./index.html" or "index.html". We are in /workspace. Use "index.html".
index.html (3217 bytes)Successfully wrote 3217 bytes to index.html
thinking
Now we need to verify the file exists and maybe test quickly? The task is to produce index.html. We have done that. We can optionally check content. Let's read the file to ensure it's correct.
{"path":"index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Icosahedron with Starfield</title> <style> body { margin: 0; overflow: hidden; } canvas { display: block; } </style> </head> <body> <script src="three.min.js"></script> <script> // Scene setup const scene = new THREE.Scene(); scene.background = new THREE.Color(0x000000); const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 2000); camera.position.z = 5; const renderer = new THREE.WebGLRenderer({ antialias: true }); renderer.setSize(window.innerWidth, window.innerHeight); renderer.setPixelRatio(window.devicePixelRatio); document.body.appendChild(renderer.domElement); // Icosahedron const geometry = new THREE.IcosahedronGeometry(1.5, 0); const material = new THREE.MeshPhongMaterial({ color: 0xffffff, shininess: 0, flatShading: true }); const icosahedron = new THREE.Mesh(geometry, material); scene.add(icosahedron); // Starfield const starCount = 5000; const starGeometry = new THREE.BufferGeometry(); const starPositions = new Float32Array(starCount * 3); for (let i = 0; i < starCount; i++) { const radius = 800 + Math.random() * 400; // distribute in a shell const phi = Math.acos(2 * Math.random() - 1); const theta = 2 * Math.PI * Math.random(); starPositions[i * 3] = radius * Math.sin(phi) * Math.cos(theta); starPositions[i * 3 + 1] = radius * Math.sin(phi) * Math.sin(theta); starPositions[i * 3 + 2] = radius * Math.cos(phi); } starGeometry.setAttribute('position', new THREE.BufferAttribute(starPositions, 3)); const starMaterial = new THREE.PointsMaterial({ color: 0xffffff, size: 2, sizeAttenuation: false }); const stars = new THREE.Points(starGeometry, starMaterial); scene.add(stars); // Two colored point lights const light1 = new THREE.PointLight(0xff0000, 1, 0); const light2 = new THREE.PointLight(0x0000ff, 1, 0); scene.add(light1); scene.add(light2); // Animation variables const clock = new THREE.Clock(); function animate() { requestAnimationFrame(animate); const elapsed = clock.getElapsedTime(); // Rotate icosahedron icosahedron.rotation.x += 0.005; icosahedron.rotation.y += 0.003; // Orbit lights around the icosahedron const lightRadius = 5; light1.position.set( Math.cos(elapsed * 0.3) * lightRadius, Math.sin(elapsed * 0.3) * lightRadius, Math.sin(elapsed * 0.2) * lightRadius ); light2.position.set( Math.cos(elapsed * 0.3 + Math.PI) * lightRadius, Math.sin(elapsed * 0.3 + Math.PI) * lightRadius, Math.sin(elapsed * 0.2 + Math.PI) * lightRadius ); renderer.render(scene, camera); } animate(); // Handle window resize window.addEventListener('resize', () => { camera.aspect = window.innerWidth / window.innerHeight; camera.updateProjectionMatrix(); renderer.setSize(window.innerWidth, window.innerHeight); }); </script> </body> </html>
thinking
The file looks good. It loads three.min.js, sets up scene, icosahedron, starfield, two point lights orbiting, and rotates icosahedron. It's self-contained, no external resources. Should fulfill the requirement. Now we can finalize.
The task is complete. The `index.html` file has been created in the current directory with all required functionality: a full-screen scene using the provided `three.min.js`, a rotating icosahedron, two colored point lights orbiting the icosahedron, and a subtle starfield background. The CSS and JS are inline, and no external resources are used. You can now open `index.html` in a browser to view the result.
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 red/blue point lights and starfield background self-rotates continuously; inputs don't add extra interactivity.
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.