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提交 a22bba11 编写于 作者: M Mr.doob
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Merge remote-tracking branch 'zz85/experimental' into dev

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examples/canvas_particles_shapes.html 0 → 100644
浏览文件 @ a22bba11
<!DOCTYPE HTML>
<html lang="en">
<head>
<title>three.js canvas/webgl - geometry - text</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 {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script type="text/javascript" src="../build/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="js/Sparks.js"></script>
<!-- load the font file from canvas-text -->
<script type="text/javascript" src="fonts/helvetiker_regular.typeface.js"></script>
<script type="text/javascript">
var container, stats;
var camera, scene, renderer;
var text, plane;
var targetRotation = 0;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var heartShape, particleCloud, sparksEmitter, emitterPos;
var _rotation = 0;
var timeOnShapePath = 0;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = 'Three.js with Love. Simple Particle Systems with Shapes by <a href="http://www.lab4games.net/zz85/blog">zz85</a><br/>Move your mouse. Click to pause/resume.';
container.appendChild( info );
camera = new THREE.Camera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.y = 150;
camera.position.z = 700;
camera.target.position.y = 150;
scene = new THREE.Scene();
// Get text from hash
var theText = "THREE.JS";
var hash = document.location.hash.substr( 1 );
if ( hash.length !== 0 ) {
theText = hash;
}
var text3d = new THREE.TextGeometry( theText, {
size: 80,
height: 20,
curveSegments: 2,
font: "helvetiker"
});
text3d.computeBoundingBox();
var centerOffset = -0.5 * ( text3d.boundingBox.x[ 1 ] - text3d.boundingBox.x[ 0 ] );
var textMaterial = new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, wireframe: false } );
text = new THREE.Mesh( text3d, textMaterial );
// Potentially, we can extract the vertices or faces of the text to generate particles too.
// Geo > Vertices > Position
text.doubleSided = false;
text.position.x = centerOffset;
text.position.y = 100;
text.position.z = 0;
text.rotation.x = 0;
text.rotation.y = Math.PI * 2;
text.overdraw = true;
parent = new THREE.Object3D();
parent.addChild( text );
particleCloud = new THREE.Object3D(); // Just a group
particleCloud.y = 800;
parent.addChild( particleCloud );
scene.addObject( parent );
// Create Particle Systems
// Heart
var x = 0, y = 0;
heartShape = new THREE.Shape();
heartShape.moveTo( x + 25, y + 25 );
heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35,x - 30,y + 35 );
heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
var circleLines = function ( context ) {
context.lineWidth = 0.05; //0.05
context.beginPath();
context.arc( 0, 0, 1, 0, Math.PI*2, true );
context.closePath();
context.stroke();
context.globalAlpha = 0.2;
context.fill();
}
var hue = 0;
var hearts = function ( context ) {
context.globalAlpha = 0.5;
var x = 0, y = 0;
context.scale(0.1, -0.1); // Scale so canvas render can redraw within bounds
context.beginPath();
// From http://blog.burlock.org/html5/130-paths
context.bezierCurveTo( x + 2.5, y + 2.5, x + 2.0, y, x, y );
context.bezierCurveTo( x - 3.0, y, x - 3.0, y + 3.5,x - 3.0,y + 3.5 );
context.bezierCurveTo( x - 3.0, y + 5.5, x - 1.0, y + 7.7, x + 2.5, y + 9.5 );
context.bezierCurveTo( x + 6.0, y + 7.7, x + 8.0, y + 5.5, x + 8.0, y + 3.5 );
context.bezierCurveTo( x + 8.0, y + 3.5, x + 8.0, y, x + 5.0, y );
context.bezierCurveTo( x + 3.5, y, x + 2.5, y + 2.5, x + 2.5, y + 2.5 );
context.closePath();
context.fill();
context.lineWidth = 0.5; //0.05
context.stroke();
}
var setTargetParticle = function() {
//hearts circleLines
var material = new THREE.ParticleCanvasMaterial( { program: hearts, blending:THREE.AdditiveBlending } );
material.color.setHSV(hue, 0.5, 1);
hue += 0.001;
if (hue>1) hue-=1;
particle = new THREE.Particle( material );
particle.scale.x = particle.scale.y = Math.random() * 20 +20;
particleCloud.addChild( particle );
return particle;
};
var onParticleCreated = function(p) {
var position = p.position;
p.target.position = position;
};
var onParticleDead = function(particle) {
particle.target.visible = false;
particleCloud.removeChild(particle.target);
};
sparksEmitter = new SPARKS.Emitter(new SPARKS.SteadyCounter(160));
emitterpos = new THREE.Vector3(0,0,0);
sparksEmitter.addInitializer(new SPARKS.Position( new SPARKS.PointZone( emitterpos ) ) );
sparksEmitter.addInitializer(new SPARKS.Lifetime(0,2));
sparksEmitter.addInitializer(new SPARKS.Target(null, setTargetParticle));
sparksEmitter.addInitializer(new SPARKS.Velocity(new SPARKS.PointZone(new THREE.Vector3(0,-50,10))));
// TOTRY Set velocity to move away from centroid
sparksEmitter.addAction(new SPARKS.Age());
//sparksEmitter.addAction(new SPARKS.Accelerate(0.2));
sparksEmitter.addAction(new SPARKS.Move());
sparksEmitter.addAction(new SPARKS.RandomDrift(50,50,2000));
sparksEmitter.addCallback("created", onParticleCreated);
sparksEmitter.addCallback("dead", onParticleDead);
sparksEmitter.start();
// End Particles
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( 'mousedown', onDocumentMouseDown, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
}
//
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
function onDocumentMouseDown( event ) {
event.preventDefault();
mouseXOnMouseDown = event.clientX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
if (sparksEmitter.isRunning()) {
sparksEmitter.stop();
} else {
sparksEmitter.start();
}
}
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
}
function onDocumentTouchStart( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
}
}
function onDocumentTouchMove( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;
}
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
timeOnShapePath += 0.0337;
if (timeOnShapePath > 1) timeOnShapePath -= 1;
// TODO Create a PointOnShape Action/Zone in the particle engine
var pointOnShape = heartShape.getPointAt(timeOnShapePath);
emitterpos.x = pointOnShape.x * 5 - 100;
emitterpos.y = -pointOnShape.y * 5 + 400;
// Pretty cool effect if you enable this
//particleCloud.rotation.y += 0.05;
parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05;
renderer.render( scene, camera );
}
</script>
</body>
</html>
examples/js/Sparks.js 0 → 100644
浏览文件 @ a22bba11
/*
* @author zz85 (http://github.com/zz85 http://www.lab4games.net/zz85/blog)
*
* a simple to use javascript 3d particles system inspired by FliNT and Stardust
* created with TWEEN.js and THREE.js
*
* for feature requests or bugs, please visit https://github.com/zz85/sparks.js
*
* licensed under the MIT license
*/
var SPARKS = {};
/********************************
* Emitter Class
*
* Creates and Manages Particles
*********************************/
SPARKS.Emitter = function (counter) {
this._counter = counter ? counter : new SPARKS.SteadyCounter(10); // provides number of particles to produce
this._particles = [];
this._initializers = []; // use for creation of particles
this._actions = []; // uses action to update particles
this._activities = []; // not supported yet
this._handlers = [];
this.callbacks = {};
};
SPARKS.Emitter.prototype = {
_TIMESTEP: 15,
_timer: null,
_lastTime: null,
_timerStep: 10,
// run its built in timer / stepping
start: function() {
this._lastTime = Date.now();
this._timer = setTimeout(this.step, this._timerStep, this);
this._isRunning = true;
},
stop: function() {
this._isRunning = false;
clearTimeout(this._timer);
},
isRunning: function() {
return this._isRunning & true;
},
// Step gets called upon by the engine
// but attempts to call update() on a regular basics
// This method is also described in http://gameclosure.com/2011/04/11/deterministic-delta-tee-in-js-games/
step: function(emitter) {
var time = Date.now();
var elapsed = time - emitter._lastTime;
while(elapsed >= emitter._TIMESTEP) {
emitter.update(emitter._TIMESTEP / 1000);
elapsed -= emitter._TIMESTEP;
}
emitter._lastTime = time - elapsed;
if (emitter._isRunning)
setTimeout(emitter.step, emitter._timerStep, emitter);
},
// Update particle engine in seconds, not milliseconds
update: function(time) {
var len = this._counter.updateEmitter( this, time );
// Create particles
for( i = 0; i < len; i++ ) {
this.createParticle();
}
// Update activities
len = this._activities.length;
for ( i = 0; i < len; i++ )
{
this_.activities[i].update( this, time );
}
len = this._actions.length;
var action;
var len2 = this._particles.length;
for( j = 0; j < len; j++ )
{
action = this._actions[j];
for ( i = 0; i < len2; ++i )
{
particle = this._particles[i];
action.update( this, particle, time );
}
}
// remove dead particles
for ( i = len2; i--; )
{
particle = this._particles[i];
if ( particle.isDead )
{
//particle =
this._particles.splice( i, 1 );
this.dispatchEvent("dead", particle);
SPARKS.VectorPool.release(particle.position); //
SPARKS.VectorPool.release(particle.velocity);
} else {
this.dispatchEvent("updated", particle);
}
}
},
createParticle: function() {
var particle = new SPARKS.Particle();
// In future, use a Particle Factory
var len = this._initializers.length, i;
for ( i = 0; i < len; i++ ) {
this._initializers[i].initialize( this, particle );
}
this._particles.push( particle );
this.dispatchEvent("created", particle); // ParticleCreated
return particle;
},
addInitializer: function (initializer) {
this._initializers.push(initializer);
},
addAction: function (action) {
this._actions.push(action);
},
addCallback: function(name, callback) {
this.callbacks[name] = callback;
},
dispatchEvent: function(name, args) {
var callback = this.callbacks[name];
if (callback) {
callback(args);
}
}
};
// Number of particles per seconds
SPARKS.SteadyCounter = function(rate) {
this.rate = rate;
};
SPARKS.SteadyCounter.prototype.updateEmitter = function(emitter, time) {
return Math.floor(time * this.rate);
};
/********************************
* Particle Class
*
* Represents a single particle
*********************************/
SPARKS.Particle = function() {
/**
* The lifetime of the particle, in seconds.
*/
this.lifetime = 0;
/**
* The age of the particle, in seconds.
*/
this.age = 0;
/**
* The energy of the particle.
*/
this.energy = 1;
/**
* Whether the particle is dead and should be removed from the stage.
*/
this.isDead = false;
this.target = null; // tag
/**
* For 3D
*/
this.position = SPARKS.VectorPool.get().set(0,0,0); //new THREE.Vector3( 0, 0, 0 );
this.velocity = SPARKS.VectorPool.get().set(0,0,0); //new THREE.Vector3( 0, 0, 0 );
// rotation vec3
// angVelocity vec3
// faceAxis vec3
};
/********************************
* Action Classes
*
* An abstract class which have
* update function
*********************************/
SPARKS.Action = function() {
this._priority = 0;
};
SPARKS.Age = function(easing) {
this._easing = (easing == null) ? TWEEN.Easing.Linear.EaseNone : easing;
};
SPARKS.Age.prototype.update = function (emitter, particle, time) {
particle.age += time;
if( particle.age >= particle.lifetime )
{
particle.energy = 0;
particle.isDead = true;
}
else
{
var t = this._easing(particle.age / particle.lifetime);
particle.energy = -1 * t + 1;
}
};
/*
// Mark particle as dead when particle's < 0
SPARKS.Death = function(easing) {
this._easing = (easing == null) ? TWEEN.Linear.EaseNone : easing;
};
SPARKS.Death.prototype.update = function (emitter, particle, time) {
if (particle.life <= 0) {
particle.isDead = true;
}
};
*/
SPARKS.Move = function() {
};
SPARKS.Move.prototype.update = function(emitter, particle, time) {
var p = particle.position;
var v = particle.velocity;
p.x += v.x * time;
p.y += v.y * time;
p.z += v.z * time;
};
SPARKS.Accelerate = function(x,y,z) {
if (x instanceof THREE.Vector3) {
this.acceleration = x;
return;
}
this.acceleration = new THREE.Vector3(x,y,z);
};
SPARKS.Accelerate.prototype.update = function(emitter, particle, time) {
var acc = this.acceleration;
var v = particle.velocity;
v.x += acc.x * time;
v.y += acc.y * time;
v.z += acc.z * time;
};
/* Set the max ammount of x,y,z drift movements in a second */
SPARKS.RandomDrift = function(x,y,z) {
if (x instanceof THREE.Vector3) {
this.drift = x;
return;
}
this.drift = new THREE.Vector3(x,y,z);
}
SPARKS.RandomDrift.prototype.update = function(emitter, particle, time) {
var drift = this.drift;
var v = particle.velocity;
v.x += ( Math.random() - 0.5 ) * drift.x * time;
v.y += ( Math.random() - 0.5 ) * drift.y * time;
v.z += ( Math.random() - 0.5 ) * drift.z * time;
};
/********************************
* Zone Classes
*
* An abstract classes which have
* getLocation() function
*********************************/
SPARKS.Zone = function() {
};
// TODO, contains() for Zone
SPARKS.PointZone = function(pos) {
this.pos = pos;
};
SPARKS.PointZone.prototype.getLocation = function() {
return this.pos;
};
SPARKS.PointZone = function(pos) {
this.pos = pos;
};
SPARKS.PointZone.prototype.getLocation = function() {
return this.pos;
};
SPARKS.LineZone = function(start, end) {
this.start = start;
this.end = end;
this._length = end.clone().subSelf( start );
};
SPARKS.LineZone.prototype.getLocation = function() {
var len = this._length.clone();
len.multiplyScalar( Math.random() );
return len.addSelf( this.start );
};
// Basically a RectangleZone
SPARKS.ParallelogramZone = function(corner, side1, side2) {
this.corner = corner;
this.side1 = side1;
this.side2 = side2;
};
SPARKS.ParallelogramZone.prototype.getLocation = function() {
var d1 = this.side1.clone().multiplyScalar( Math.random() );
var d2 = this.side2.clone().multiplyScalar( Math.random() );
d1.addSelf(d2);
return d1.addSelf( this.corner );
};
/**
* The constructor creates a DiscZone 3D zone.
*
* @param centre The point at the center of the disc.
* @param normal A vector normal to the disc.
* @param outerRadius The outer radius of the disc.
* @param innerRadius The inner radius of the disc. This defines the hole
* in the center of the disc. If set to zero, there is no hole.
*/
/*
// BUGGY!!
SPARKS.DiscZone = function(center, radiusNormal, outerRadius, innerRadius) {
this.center = center;
this.radiusNormal = radiusNormal;
this.outerRadius = (outerRadius==undefined) ? 0 : outerRadius;
this.innerRadius = (innerRadius==undefined) ? 0 : innerRadius;
};
SPARKS.DiscZone.prototype.getLocation = function() {
var rand = Math.random();
var _innerRadius = this.innerRadius;
var _outerRadius = this.outerRadius;
var center = this.center;
var _normal = this.radiusNormal;
_distToOrigin = _normal.dot( center );
var radius = _innerRadius + (1 - rand * rand ) * ( _outerRadius - _innerRadius );
var angle = Math.random() * SPARKS.Utils.TWOPI;
var _distToOrigin = _normal.dot( center );
var axes = SPARKS.Utils.getPerpendiculars( _normal.clone() );
var _planeAxis1 = axes[0];
var _planeAxis2 = axes[1];
var p = _planeAxis1.clone();
p.multiplyScalar( radius * Math.cos( angle ) );
var p2 = _planeAxis2.clone();
p2.multiplyScalar( radius * Math.sin( angle ) );
p.addSelf( p2 );
return _center.add( p );
};
*/
SPARKS.SphereCapZone = function(x, y, z, minr, maxr, angle) {
this.x = x;
this.y = y;
this.z = z;
this.minr = minr;
this.maxr = maxr;
this.angle = angle;
};
SPARKS.SphereCapZone.prototype.getLocation = function() {
var theta = Math.PI *2 * SPARKS.Utils.random();
var r = SPARKS.Utils.random();
//new THREE.Vector3
var v = SPARKS.VectorPool.get().set(r * Math.cos(theta), -1 / Math.tan(this.angle * SPARKS.Utils.DEGREE_TO_RADIAN), r * Math.sin(theta));
//v.length = StardustMath.interpolate(0, _minRadius, 1, _maxRadius, Math.random());
var i = this.minr - ((this.minr-this.maxr) * Math.random() );
v.multiplyScalar(i);
v.__markedForReleased = true;
return v;
};
/********************************
* Initializer Classes
*
* Classes which initializes
* particles. Implements initialize( emitter:Emitter, particle:Particle )
*********************************/
// Specifies random life between max and min
SPARKS.Lifetime = function(min, max) {
this._min = min;
this._max = max ? max : min;
};
SPARKS.Lifetime.prototype.initialize = function( emitter/*Emitter*/, particle/*Particle*/ ) {
particle.lifetime = this._min + SPARKS.Utils.random() * ( this._max - this._min );
};
SPARKS.Position = function(zone) {
this.zone = zone;
};
SPARKS.Position.prototype.initialize = function( emitter/*Emitter*/, particle/*Particle*/ ) {
var pos = this.zone.getLocation();
particle.position.set(pos.x, pos.y, pos.z);
};
SPARKS.Velocity = function(zone) {
this.zone = zone;
};
SPARKS.Velocity.prototype.initialize = function( emitter/*Emitter*/, particle/*Particle*/ ) {
var pos = this.zone.getLocation();
particle.velocity.set(pos.x, pos.y, pos.z);
if (pos.__markedForReleased) {
//console.log("release");
SPARKS.VectorPool.release(pos);
pos.__markedForReleased = false;
}
};
SPARKS.Target = function(target, callback) {
this.target = target;
this.callback = callback;
};
SPARKS.Target.prototype.initialize = function( emitter, particle) {
if (this.callback) {
particle.target = this.callback();
} else {
particle.target = this.target;
}
};
/********************************
* VectorPool
*
* Reuse much of Vectors if possible
*********************************/
SPARKS.VectorPool = {
__pools: [],
// Get a new Vector
get: function() {
if (this.__pools.length>0) {
return this.__pools.pop();
}
return this._addToPool();
},
// Release a vector back into the pool
release: function(v) {
this.__pools.push(v);
},
// Create a bunch of vectors and add to the pool
_addToPool: function() {
//console.log("creating some pools");
for (var i=0, size = 100; i < size; i++) {
this.__pools.push(new THREE.Vector3());
}
return new THREE.Vector3();
}
};
/********************************
* Util Classes
*
* Classes which initializes
* particles. Implements initialize( emitter:Emitter, particle:Particle )
*********************************/
SPARKS.Utils = {
random: function() {
return Math.random();
},
DEGREE_TO_RADIAN: Math.PI / 180,
TWOPI: Math.PI * 2,
getPerpendiculars: function(normal) {
var p1 = this.getPerpendicular( normal );
var p2 = normal.cross( p1 );
p2.normalize();
return [ p1, p2 ];
},
getPerpendicular: function( v )
{
if( v.x == 0 )
{
return new THREE.Vector3D( 1, 0, 0 );
}
else
{
var temp = new THREE.Vector3( v.y, -v.x, 0 );
return temp.normalize();
}
}
};
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