model-element-samples/playbackrate.html at main · zachernuk/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: playbackRate test</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <h1>Model: playbackRate test</h1>
    <hr />
    <p>
      A model's <code>playbackRate</code> may be altered to change the speed of
      the animation. While playing, the animation will advance according to the
      rate specified.
    </p>

    <h2>JavaScript</h2>
    <pre>model.playbackRate = 2; //double the default rate </pre>

    <model autoplay loop>
      <source src="./teapot.usdz" type="model/vnd.usdz+zip" />
      <source src="./teapot.glb" type="model/gltf-binary" />
      <img src="./teapot-fallback-animated.jpg" alt="An image of a model of a teapot with a creature inside" >
    </model>
    <br />
    Playback rate:
    <span id="ratelabel"></span>
    <input type="range" min="0" max="2" value="1" step="0.1" id="rate" />
  </body>

  <script type="module">
    const model = document.querySelector("model");
    await model.ready;
    model.playbackRate = 1;
    rate.addEventListener("input", (e) => {
      var rateSq = Math.pow(rate.value, 2);
      ratelabel.innerHTML = (rateSq * 100).toFixed() + "%";
      model.playbackRate = rateSq;
    });
  </script>
</html>