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| (function(){
'use strict';
var tau = Math.PI * 2;
var width, height;
var mode;
var scene, camera, renderer, pointCloud;
THREE.ImageUtils.crossOrigin = '';
var SETTINGS = [{
particleCount: 100000,
material: new THREE.PointCloudMaterial({
size: 0.1,
color: 0xfff,
transparent: true,
opacity: 0.5
}),
initialize: null,
spawnBehavior: function(index){
var x, y, z;
x = (Math.random() * 2000) - 1000;
y = (Math.random() * 2000) - 1000;
z = (Math.random() * 2000) - 1000;
return new THREE.Vector3(x, y, z);
},
frameBehavior: null,
sceneFrameBehavior: function(){
camera.rotation.x -= 0.000015;
camera.rotation.y += 0.00005;
camera.rotation.z += 0.00005;
camera.translateZ(-1);
}
}]
function onDocumentReady(){
initialize();
}
function addModeButtons(){
var buttons = document.getElementById('buttons');
_.forEach(SETTINGS, function(mode){
var button = document.createElement('button');
button.textContent = mode.name;
button.addEventListener('click', function(){
setMode(mode);
});
buttons.appendChild(button);
});
}
function initialize(){
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(120, width / height, 1, 1000);
renderer = new THREE.WebGLRenderer();
document.body.appendChild(renderer.domElement);
window.addEventListener('resize', onWindowResize);
onWindowResize();
addModeButtons();
scene.fog = new THREE.Fog(0, 1);
setMode(SETTINGS[SETTINGS.length-1]);
var controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.enableDamping = true;
controls.dampingFactor = 0.25;
controls.enableZoom = false;
AnimationController.registerAnimation(render);
}
function setMode(_mode){
mode = _mode;
scene.remove(pointCloud);
resetCamera();
var points = createPoints(mode.spawnBehavior);
var material = mode.material;
pointCloud = new THREE.PointCloud(points, material);
if(mode.initialize && typeof mode.initialize === 'function'){
mode.initialize();
}
scene.add(pointCloud);
}
function createPoints(spawnBehavior){
var ret = new THREE.Geometry();
_.times(mode.particleCount, function(index){
ret.vertices.push(spawnBehavior(index));
})
return ret;
}
function onWindowResize(){
width = window.innerWidth;
height = window.innerHeight;
updateRendererSize();
}
function resetCamera(){
camera.position.x = camera.position.y = camera.position.z = camera.rotation.x = camera.rotation.y = camera.rotation.z = 0;
}
function updateRendererSize(){
renderer.setSize(window.innerWidth, window.innerHeight);
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
}
function updateParticles(){
if(mode.sceneFrameBehavior && typeof mode.sceneFrameBehavior === 'function'){
mode.sceneFrameBehavior();
}
if(mode.frameBehavior && typeof mode.frameBehavior === 'function'){
_.forEach(pointCloud.geometry.vertices, mode.frameBehavior);
pointCloud.geometry.verticesNeedUpdate = true;
pointCloud.geometry.colorsNeedUpdate = true;
}
}
function render(){
updateParticles();
renderer.render(scene, camera);
}
document.addEventListener('DOMContentLoaded', onDocumentReady);
})(); |
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