examples/test/transpose.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>MathBox - Surface</title>
    <script
      type="text/javascript"
      src="https://cdn.jsdelivr.net/npm/three@0.137.0/build/three.min.js"
    ></script>
    <script
      type="text/javascript"
      src="https://cdn.jsdelivr.net/npm/three@0.137.0/examples/js/controls/OrbitControls.js"
    ></script>
    <!--
      - a minified version mathbox.min.js is also available;
      - recommend using a specific version (not @latest) in public sites
    -->
    <script
      type="text/javascript"
      src="https://cdn.jsdelivr.net/npm/mathbox@latest/build/bundle/mathbox.js"
    ></script>
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/npm/mathbox@latest/build/mathbox.css"
    />
    <meta name="viewport" content="initial-scale=1, maximum-scale=1" />
  </head>
  <body>
    <script>
      mathbox = MathBox.mathBox({
        plugins: ["core", "controls", "cursor"],
        controls: {
          klass: THREE.OrbitControls,
        },
      });
      three = mathbox.three;

      three.camera.position.set(2.85, 3.84, -1.8);
      three.renderer.setClearColor(new THREE.Color(0xffffff), 1.0);

      view = mathbox.cartesian({
        range: [
          [-3, 3],
          [-0.5, 1],
          [-3, 3],
        ],
        scale: [2, 1, 2],
      });

      view.axis({
        axis: 1,
      });
      view.axis({
        axis: 3,
      });

      view.grid({
        width: 5,
        opacity: 0.5,
        axes: [1, 3],
      });

      view.area({
        id: "sampler",
        width: 33,
        height: 33,
        axes: [1, 3],
        expr: function (emit, x, z, i, j, t) {
          var y1 = 0.75 + 0.5 * (Math.sin(x + t) * Math.sin(z + t));
          var y2 =
            0.5 +
            0.5 *
              (Math.sin(x * 1.25 + Math.sin(z + t) - t * 1.34) *
                Math.sin(z * 1.17 - t * 0.79));
          emit(x, y1, z);
          emit(x, y2, z);
        },
        items: 2,
        channels: 3,
      });
      view.transpose({
        order: "wxyz",
      });
      view.lerp({
        height: 65,
      });
      view.surface({
        shaded: true,
        color: 0x3090ff,
        width: 5,
      });
      view.surface({
        fill: false,
        lineY: true,
        color: 0x3090ff,
        width: 5,
        zBias: 1,
      });
      view.transpose({
        source: "#sampler",
        order: "wyxz",
      });
      view.lerp({
        height: 65,
      });
      view.surface({
        shaded: true,
        color: 0x3090ff,
        width: 5,
      });
      view.surface({
        shaded: true,
        fill: false,
        lineY: true,
        color: 0x3090ff,
        width: 5,
        zBias: 1,
      });
    </script>
  </body>
</html>