sparksjs
Version:
Sparks library for three.js with theen.js
245 lines (162 loc) • 6.63 kB
HTML
<html lang="en">
<head>
<title>Sparks.js - three.js canvas particles - color wheel</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/>
<style type="text/css">
body {
background-color: #000000;
margin: 0px;
overflow: hidden;
}
a {
color:#0078ff;
}
</style>
</head>
<body>
<!--
<script type="text/javascript" src="http://mrdoob.github.com/three.js/build/Three.js"></script>
<script type="text/javascript" src="http://mrdoob.github.com/three.js/examples/js/RequestAnimationFrame.js"></script>
<script type="text/javascript" src="http://mrdoob.github.com/three.js/examples/js/Stats.js"></script>
<script type="text/javascript" src="http://sole.github.com/tween.js/src/Tween.js"></script>
<script type="text/javascript" src="https://raw.github.com/zz85/sparks.js/master/Sparks.js"></script>
-->
<script type="text/javascript" src="js/Three.js"></script>
<script type="text/javascript" src="js/RequestAnimationFrame.js"></script>
<script type="text/javascript" src="js/Stats.js"></script>
<script type="text/javascript" src="js/Tween.js"></script>
<script type="text/javascript" src="../Sparks.js"></script>
<script type="text/javascript" src="CanvasShaders.js"></script>
<script type="text/javascript">
// Inspired from http://wonderfl.net/c/qTwn and mr doob three.js examples
var container, stats;
var camera, scene, renderer, group, particle;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var lasttime = Date.now(), elapsed;
init();
animate();
var sparksEmitter;
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.Camera( 75, window.innerWidth / window.innerHeight, 1, 3000 );
camera.position.z = 200; //1000
scene = new THREE.Scene();
group = new THREE.Object3D();
scene.add( group );
renderer = new THREE.CanvasRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
function generateSprite() {
var canvas = document.createElement( 'canvas' );
canvas.width = 16;
canvas.height = 16;
var context = canvas.getContext( '2d' );
var gradient = context.createRadialGradient( canvas.width / 2, canvas.height / 2, 0, canvas.width / 2, canvas.height / 2, canvas.width / 2 );
gradient.addColorStop( 0, 'rgba(255,255,255,1)' );
gradient.addColorStop( 0.2, 'rgba(0,255,255,1)' );
gradient.addColorStop( 0.4, 'rgba(0,0,64,1)' );
gradient.addColorStop( 1, 'rgba(0,0,0,1)' );
context.fillStyle = gradient;
context.fillRect( 0, 0, canvas.width, canvas.height );
return canvas;
}
//// EMITTER STUFF
sparksEmitter = new SPARKS.Emitter(new SPARKS.SteadyCounter(200));
emitterpos = new THREE.Vector3(0,0,0);
var sphereCap = new SPARKS.SphereCapZone(0, 0, 0, 10, 0, 40);
sparksEmitter.addInitializer(new SPARKS.Position( new SPARKS.PointZone( emitterpos ) ) );
sparksEmitter.addInitializer(new SPARKS.Lifetime(0,4));
var h = 0;
var callback = function() {
var material = new THREE.ParticleCanvasMaterial( { program: SPARKS.CanvasShadersUtils.circles , blending:THREE.AdditiveBlending } );
material.color.setHSV(h, 1, 0.5); //0.7
h += 0.001;
if (h>1) h-=1;
particle = new THREE.Particle( material );
particle.scale.x = particle.scale.y = Math.random() * 2 +1;
group.add( particle );
return particle;
};
sparksEmitter.addInitializer(new SPARKS.Target(null, callback));
sparksEmitter.addInitializer(new SPARKS.Velocity(sphereCap));
sparksEmitter.addAction(new SPARKS.Age());
sparksEmitter.addAction(new SPARKS.Accelerate(0.2));
sparksEmitter.addAction(new SPARKS.Move());
sparksEmitter.addCallback("created", function(p) {
var position = p.position;
p.target.position = position;
});
sparksEmitter.addCallback("initialized", function(particle) {
var position = p.position;
p.target.position = position;
});
sparksEmitter.addCallback("dead", function(particle) {
particle.target.visible = false; // is this a work around?
group.remove(particle.target);
});
/*
sparksEmitter.addCallback("updated", function(p) {
});
*/
sparksEmitter.start();
}
//
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
}
function onDocumentTouchStart( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
function onDocumentTouchMove( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
}
//
function animate(time) {
if (!time) {
time = Date.now();
}
elapsed = time - lasttime;
//console.log( elapsed, time,lasttime );
lasttime = time;
//sparksEmitter.update(elapsed / 1000);
requestAnimationFrame( animate );
render();
stats.update();
}
var _rotation = 0;
function render() {
camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
//
group.rotation.x += 0.01;
group.rotation.y += 0.02;
_rotation += 3;
emitterpos.x = 100 * Math.sin((_rotation ) * SPARKS.Utils.DEGREE_TO_RADIAN);
emitterpos.y = 100 * Math.cos((_rotation +mouseY) * SPARKS.Utils.DEGREE_TO_RADIAN);
emitterpos.z = 100 * Math.cos((_rotation +mouseX) * SPARKS.Utils.DEGREE_TO_RADIAN);
renderer.render( scene, camera );
}
</script>
</body>
</html>