Point Cloud

example 2

HTML

<div id="info">PointCloud Example2</div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/three.js/r70/three.min.js"></script>

CSS

#info {
    position: absolute;
    top: 0px;
    width: 100%;
    padding: 10px;
    text-align: center;
    color: #ffff00
}
body {
    overflow: hidden;
}

JavaScript

// from
// http://threejs.org/examples/webgl_particles_billboards.html


var container, stats;
var camera, scene, renderer, particles, geometry, material, i, h, color, sprite, size;
var mouseX = 0,
    mouseY = 0;

var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;

init();
animate();

function init() {

    container = document.createElement('div');
    document.body.appendChild(container);

    camera = new THREE.PerspectiveCamera(55, window.innerWidth / window.innerHeight, 2, 2000);
    camera.position.z = 1000;

    scene = new THREE.Scene();
    scene.fog = new THREE.FogExp2(0x000000, 0.001);

    geometry = new THREE.Geometry();
    THREE.ImageUtils.crossOrigin = '';
    sprite = THREE.ImageUtils.loadTexture("http://i.imgur.com/HMjPT3I.png");

    for (i = 0; i < 10000; i++) {

        var vertex = new THREE.Vector3();
        vertex.x = 2000 * Math.random() - 1000;
        vertex.y = 2000 * Math.random() - 1000;
        vertex.z = 2000 * Math.random() - 1000;

        geometry.vertices.push(vertex);

    }

    material = new THREE.PointCloudMaterial({
        size: 10,
        sizeAttenuation: false,
        map: sprite,
        alphaTest: 0.5,
        transparent: true
    });
    material.color.setHSL(1.0, 0.3, 0.7);

    particles = new THREE.PointCloud(geometry, material);
    scene.add(particles);

    //

    renderer = new THREE.WebGLRenderer();
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    container.appendChild(renderer.domElement);

    //
    document.addEventListener('mousemove', onDocumentMouseMove, false);
    
    // for iPad, iphone, ... those with touch screen
    document.addEventListener('touchstart', onDocumentTouchStart, false);
    document.addEventListener('touchmove', onDocumentTouchMove, false);

    //

    window.addEventListener('resize', onWindowResize, false);

}

function onWindowResize() {

    windowHalfX =...