model-element-samples/autorotate.html at main · immersive-web/model-element-samples · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Model auto-rotate</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <h1>Model: auto-rotate test</h1>
      <hr />
      <p>
        A model's <code>DOMMatrixReadOnly entityTransform</code> can be set to
        display a certain side, or to automatically animate the content.
      </p>

      <h2>HTML</h2>
      <pre>
&lt;model alt="A model of a teapot"&gt;
    &lt;source src="./teapot.usdz" type="model/vnd.usdz+zip" /&gt;
    &lt;source src="./teapot.glb"  type="model/gltf-binary" /&gt;
&lt;/model&gt;
</pre
      >

      <h2>JavaScript:</h2>
      <pre>
let initialTransform;
const model = document.querySelector('model');
await model.ready;
initialTransform = model.entityTransform.translate(0,0,-0.05);
requestAnimationFrame(update);

function update() {
    try {
        const angleY = performance.now()/10;
        model.entityTransform = initialTransform.rotate(0, angleY,0);
    } catch(error) {
        console.warn("failed to set transform", error);
    }
    requestAnimationFrame(update);
}
</pre
      >

      <br />

      <model alt="A model of a teapot">
        <source src="./teapot.usdz" type="model/vnd.usdz+zip" />
        <source src="./teapot.glb" type="model/gltf-binary" />
        <img
          src="./teapot-fallback-black.jpg"
          alt="An image of a model of a teapot" />
      </model>
    </div>

    <script type="module">
      let initialTransform;
      const model = document.querySelector('model');
      await model.ready;
      initialTransform = model.entityTransform.translate(0, 0, -0.05);
      requestAnimationFrame(update);

      function update() {
        try {
          const angleY = performance.now() / 10;
          model.entityTransform = initialTransform.rotate(0, angleY, 0);
        } catch (error) {
          console.warn('failed to set transform', error);
        }
        requestAnimationFrame(update);
      }
    </script>
  </body>
</html>