mathbox/examples/test/volume.html at master · unconed/mathbox · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>MathBox - Voxelbuffer</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.renderer.setClearColor(new THREE.Color(0x000000), 1.0);

      mathbox.set({ scale: 500, focus: 1 });

      view = mathbox
        .camera({
          proxy: true,
          position: [-1.2, 0.4, -1.1],
        })
        .cartesian(
          {
            range: [
              [-1, 1],
              [-1, 1],
              [-1, 1],
            ],
            scale: [1, 1, 1],
          },
          {
            quaternion: function (t) {
              return [0, -Math.sin(t / 8), 0, Math.cos(t / 8)];
            },
          }
        );

      view
        .transform({
          position: [0, -1, 0],
        })
        .grid({
          axes: [1, 3],
          width: 2,
          depth: 1,
          color: 0xffffff,
          opacity: 0.5,
          blending: THREE.AdditiveBlending,
        })
        .axis({
          axis: 1,
          end: true,
          width: 3,
          depth: 1,
          color: 0xffffff,
          opacity: 0.5,
          zBias: -1,
          blending: THREE.AdditiveBlending,
        })
        .axis({
          axis: 3,
          end: true,
          width: 3,
          depth: 1,
          color: 0xffffff,
          opacity: 0.5,
          zBias: -1,
          blending: THREE.AdditiveBlending,
        });

      view.axis({
        axis: 2,
        end: true,
        width: 3,
        depth: 1,
        color: 0xffffff,
        opacity: 0.5,
        zBias: -1,
        blending: THREE.AdditiveBlending,
      });

      view
        .transform({
          position: [0, 1, 0],
        })
        .grid({
          axes: [1, 3],
          width: 2,
          depth: 1,
          color: 0xffffff,
          opacity: 0.5,
          blending: THREE.AdditiveBlending,
        });

      view.volume({
        width: 28,
        height: 28,
        depth: 28,
        expr: function (emit, x, y, z, i, j, k, t) {
          var u = Math.cos((i + j * j + k * k * k) * 100.681 + t) * 0.05;
          var v = Math.cos((i * i * i + j + k * k) * 120.681 + t) * 0.05;
          var w = Math.cos((i * i + j * j * j + k) * 140.681 + t) * 0.05;

          emit(x, y, z);
          emit(x + u, y + v, z + w);
        },
        items: 2,
        channels: 3,
      });
      view.vector({
        color: 0x3090ff,
        width: 1,
        size: 4,
        end: true,
        zWrite: false,
        blending: THREE.AdditiveBlending,
      });
    </script>
  </body>
</html>