jsfluid/jsfluid_webgl.html at master · codinguncut/jsfluid · GitHub

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<!DOCTYPE HTML>
<html lang="en">
<meta charset="utf-8">

<style type="text/css">
  body {
    background-color: #000000;
    margin: 0px;
    overflow: hidden;
  }
</style>

<body>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r53/three.min.js"></script>
<script src="jsfluid.js"></script>

<script>
  // from here
  // http://creativejs.com/uploads/tutorials/three/Part1_particles/ThreeParticles.html

  var camera,
      scene,
      renderer,
      particles = [];

  window.onload = init();

  function init() {
    Module.initialize();
    Module.step();

    camera = new THREE.PerspectiveCamera(80,
                    window.innerWidth / window.innerHeight, 1, 4000);

    scene = new THREE.Scene();
    camera.position.z = 1000;
    scene.add(camera);

    renderer = new THREE.CanvasRenderer();
    renderer.setSize(window.innerWidth, window.innerHeight);

    document.body.appendChild(renderer.domElement);

    makeParticles();
    setInterval(update, 1000/60);
  }


  function update() {
    updateParticles();
    renderer.render(scene, camera);
  }


  function makeParticles() {
    var particle, material;
    var n = Module._get_num_points();

    for (var i = 0; i < n; i++) {
      material = new THREE.ParticleCanvasMaterial(
                        { color: 0x6666ff,
                          opacity: 0.25,
                          program: particleRender });
      particle = new THREE.Particle(material);

      particle.position.x = 0;
      particle.position.y = 0;
      particle.position.z = 300;
      particle.scale.x = particle.scale.y = 20;
      scene.add(particle);
      particles.push(particle);
    }
  }


  function particleRender(context) {
    context.beginPath();
    context.arc(0, 0, 1, 0,  Math.PI * 2, true);
    context.fill();
  };


  function updateParticles() {
    Module.step();
    var pts = Module.get_points();
    for(var i=0; i<particles.length; i++) {

      particle = particles[i];

      particle.position.x = pts[i].x/30*1000;
      particle.position.y = pts[i].z*20-500;

      // if the particle is too close move it to the back
      if(particle.position.z>1000) particle.position.z-=2000;
    }
  }
</script>
</body>