three

Included with Lifetime

$97 forever

Three.js and WebGL adapter patterns for HyperFrames. Use when creating deterministic Three.js scenes, WebGL canvas layers, AnimationMixer timelines, camera motion, shader-driven visuals, or canvas renders that respond to HyperFrames hf-seek events.

General

What this skill does


# 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

```html
<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>
```

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

## AnimationMixer Pattern

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

```js
function renderAt(time) {
  mixer.setTime(time);
  renderer.render(scene, camera);
}
```

If several mixers exist, seek all of them from the same `time`.

## Good Uses

- Deterministic 3D objects, product spins, particles with seeded data, and shader plates.
- Camera moves derived from `time`.
- GLTF animation clips when assets are local and loaded before validation completes.

## Avoid

- Using `Date.now()`, `performance.now()`, or clock deltas to update scene state.
- Leaving render-critical work inside a free-running animation loop.
- Loading remote models or textures at render time.
- Device-pixel-ratio dependent output. Pin renderer size and pixel ratio for video renders.
- Post-processing passes that depend on previous frame history unless you can reconstruct state from time.

## Validation

After editing a Three.js composition:

```bash
npx hyperframes lint
npx hyperframes validate
```

## Credits And References

- HyperFrames adapter source: `packages/core/src/runtime/adapters/three.ts`.
- Three.js `WebGLRenderer` docs: https://threejs.org/docs/pages/WebGLRenderer.html
- Three.js `AnimationMixer.setTime()` docs: https://threejs.org/docs/pages/AnimationMixer.html

Files: 2

Size: 18.1 KB

Complexity: 24/100

Category: General

Source: https://github.com/aiskillstore/marketplace/tree/main/skills/heygen-com/three

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