cursor-ad-agent: Skill for Claude Code

Three.js for HyperFrames

HyperFrames supports Three.js through its three runtime adapter. The adapter does not own your scene. It publishes HyperFrames time and dispatches a seek event so your composition can render the exact frame.

Contract

• Create the scene, camera, renderer, materials, and assets synchronously when possible.
• Render from HyperFrames time, not wall-clock time.
• Listen for the hf-seek event and render exactly that time.
• Load models, textures, and HDRIs before render-critical seeking. Do not fetch them at seek time.
• Avoid requestAnimationFrame or renderer.setAnimationLoop as the source of truth for render-critical motion.

The adapter sets window.__hfThreeTime and dispatches new CustomEvent("hf-seek", { detail: { time } }) on each seek.

Basic Pattern

<canvas id="three-layer"></canvas>
<script type="module">
  import * as THREE from "https://cdn.jsdelivr.net/npm/[email protected]/+esm";

  const canvas = document.getElementById("three-layer");
  const renderer = new THREE.WebGLRenderer({ canvas, alpha: true, antialias: true });
  // Match these to your composition's frame size.
  renderer.setSize(1920, 1080, false);
  renderer.setPixelRatio(1);

  const scene = new THREE.Scene();
  const camera = new THREE.PerspectiveCamera(35, 1920 / 1080, 0.1, 100);
  camera.position.set(0, 0, 6);

  const mesh = new THREE.Mesh(
    new THREE.IcosahedronGeometry(1.4, 4),
    new THREE.MeshStandardMaterial({ color: 0x64d2ff, roughness: 0.38 }),
  );
  scene.add(mesh);
  scene.add(new THREE.HemisphereLight(0xffffff, 0x223344, 2));

  function renderAt(time) {
    mesh.rotation.y = time * 0.7;
    mesh.rotation.x = Math.sin(time * 0.6) * 0.16;
    renderer.render(scene, camera);
  }

  window.addEventListener("hf-seek", (event) => {
    renderAt(event.detail.time);
  });

  renderAt(window.__hfThreeTime || 0);
</script>

#three-layer {
  width: 100%;
  height: 100%;
  display: block;
}

AnimationMixer Pattern

For GLTF or authored clip animation, seek the mixer directly: