raytrace/index.html at master · dcodeIO/raytrace · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="user-scalable=0" />
<title>Ray tracer - AssemblyScript</title>
<link rel="icon" href="https://assemblyscript.org/favicon.ico" type="image/x-icon"/>
<style>
  html, body { height: 100%; margin: 0; overflow: hidden; color: #111; background: #fff; font-family: sans-serif; }
  body { border-top: 2px solid #ed4854; }
  h1 { padding: 20px; font-size: 12pt; margin: 0; }
  a { color: #111; text-decoration: none; }
  a:hover { color: #0074C1; text-decoration: underline; }
  canvas { position: absolute; top: 60px; left: 20px; width: calc(100% - 40px); height: calc(100% - 80px); background: #ddd; }
</style>
</head>
<body>
<h1>
  <a href="https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-to-ray-tracing/">Ray tracer</a> in <a href="http://assemblyscript.org">AssemblyScript</a> ( <a href="https://github.com/AssemblyScript/examples/blob/master/raytrace/assembly/index.ts">source</a> )
</h1>
<script>var exports = {};</script>
<script src="node_modules/@assemblyscript/loader/index.js"></script>
<canvas id="canvas"></canvas>
<script>
exports.instantiateStreaming(fetch("build/optimized.wasm"), {}).then(exports => {
  const canvas = document.getElementById("canvas");
  const width = canvas.width = canvas.offsetWidth;
  const height = canvas.height = canvas.offsetHeight;
  const context = canvas.getContext("2d");
  const image = context.createImageData(width, height);

  const { Sphere, Vec3, ArrayOfSpheres_ID, __allocArray, __retain } = exports;
  const spheres = __retain(__allocArray(ArrayOfSpheres_ID, [
    new Sphere(new Vec3( 0.0, -10004, -20), 10000, new Vec3(0.20, 0.20, 0.20), 0, 0.0, new Vec3(0.0, 0.0, 0.0)), // plane
    new Sphere(new Vec3( 0.0,      0, -20),     4, new Vec3(1.00, 0.32, 0.36), 1, 0.5, new Vec3(0.0, 0.0, 0.0)), // red
    new Sphere(new Vec3( 5.0,     -1, -15),     2, new Vec3(0.90, 0.76, 0.46), 1, 0.0, new Vec3(0.0, 0.0, 0.0)), // yellow
    new Sphere(new Vec3( 5.0,      0, -25),     3, new Vec3(0.65, 0.77, 0.97), 1, 0.0, new Vec3(0.0, 0.0, 0.0)), // blue
    new Sphere(new Vec3(-5.5,      0, -15),     3, new Vec3(0.90, 0.90, 0.90), 1, 0.0, new Vec3(0.0, 0.0, 0.0)), // black
    new Sphere(new Vec3( 0.0,     20, -30),     3, new Vec3(0.00, 0.00, 0.00), 0, 0.0, new Vec3(3.0, 3.0, 3.0))  // light
  ]));

  console.log(width, height);
  const offset = exports.resize(width, height);

  function step(x = 0) {
    exports.render(x, spheres);
    new Uint32Array(image.data.buffer).set(new Uint32Array(exports.memory.buffer, offset, width * height));
    context.putImageData(image, 0, 0);
    if (++x == width) return;
    requestAnimationFrame(() => step(x));
  }
  step();
});
</script>
</body>
</html>