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emitter.js
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emitter.js
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// https://github.com/kaiomedau
//*****************************************************************
//HELPERS
//*****************************************************************
//Return a number btween given values eg.: Math.randMinMax(-10, 10);
Math.randMinMax = function(t,n,a){
var r= t + Math.random() * (n-t);
return a && ( r = Math.round( r ) ) , r;
}
//Return a random object from given array
function getRandom( arrayObj ){
//Sort and return a shape
return arrayObj[(Math.floor(Math.random() * arrayObj.length) % (arrayObj.length))];
}
//*****************************************************************
// EMITTER
//*****************************************************************
var tweens = [];//Collection container. Will hold all created tweens to handle mouse interacions
//All particle shapes
function particleShapes( allowLargePaths ){
//Small shape coors
var smallShapes = [
{size:{w:80,h:20}, points:"80 0 0 0 25 20"},
{size:{w:50,h:40}, points:"0 0 50 0 25 40"},
{size:{w:10,h:10}, points:"10 0 0 0.30 6 8 9 0"},
{size:{w:45,h:20}, points:"0 0 45 11 10 20"},
{size:{w:24,h:14}, points:"2 6 23 0 21 14"},
{size:{w:24,h:24}, points:"4 3 21 1 2 16"},
{size:{w:23,h:23}, points:"10 2 2 21 23 13"},
{size:{w:24,h:24}, points:"3 1 12 5 1 11"},
{size:{w:12,h:16}, points:"9 2 11 11 2 16"},
];
//Large shapes coords
var largeShapes = [
{size:{w:100,h:140}, points:"10 14 90 21 100 140"},
];
//return it
return allowLargePaths ? smallShapes.concat( largeShapes ) : smallShapes;
}
//**************
//Emitter class
window.PEmitter = function( container , data){
data = !data ? {} : data;
//**************************************************
this.emter = document.getElementById(container?container:"emitter"); //Get the emitter container
//**************************************************
this.clsses = data.classes ? data.classes : classes; //Classes to randomize
this.pCount = data.count ? data.count : 100, //Number of particles
this.pRangeX = data.rangeX ? data.rangeX : 800, //Max distance X (btween 0 and given number)
this.pRFromX = data.rFromX ? data.rFromX : 0,
this.pRangeY = data.rangeY ? data.rangeY : 800, //Max Y position (btween pRangeFromY and given number)
this.pRFromY = data.rFromY ? data.rFromY : 0, //Min Y position
this.pLife = data.life ? data.life : 15, //Min particle life
this.pLifeVar = data.lifeVar ? data.lifeVar : 15, //Random life variation increase
this.radial = data.radial ? data.radial : false, //If emitter will emitte to all sides
this.allowLarge = data.large ? data.large : false,
this.shapes = data.shapes ? data.shapes : null,
this.particles = 0; //Controll var, contains loaded particles
//If new position given
if(data.x){
this.emter.style.left = data.x;
}
if(data.y){
this.emter.style.top = data.y;
}
}
PEmitter.prototype.create = function(){
//Get particle class
var clss = this.clsses[(Math.floor(Math.random() * this.clsses.length) % (this.clsses.length))],
nx = Math.randMinMax(this.radial ? -(this.pRangeX + this.pRFromX) : this.pRFromX, this.pRangeX),
ny = Math.randMinMax(this.radial ? -(this.pRangeY + this.pRFromY) : this.pRFromY, this.pRangeY),
fx = nx > 0 ? this.pRFromX : -this.pRFromX,
fy = ny > 0 ? this.pRFromY : -this.pRFromY,
time = Math.random() * this.pLifeVar + this.pLife;
//Get random path coordinates
var pshape = this.shapes ? getRandom( this.shapes ) : getRandom( particleShapes( this.allowLarge ) );
//Create SVG
var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg"),
svgNS = svg.namespaceURI,
rect = document.createElementNS(svgNS,'polygon');
//Set attributes
rect.setAttribute('points', pshape.points);
svg.setAttribute( 'width', pshape.size.w);
svg.setAttribute( 'height', pshape.size.h);
svg.setAttribute( 'viewBox', "0 0 " + pshape.size.w + " " + pshape.size.h); //IE Fix
svg.setAttribute( 'class', "particle " + clss);
//Add rect to SVG
svg.appendChild(rect);
//Add svg to HTML container
this.emter.appendChild( svg );
//Add moviment tween
new TimelineMax({repeat:-1})
.from(svg, 0.8, { alpha:0 }) //Fade int
.fromTo(svg, time, {x:fx, y:fy}, { delay:0.2, x:nx, y:ny, z:Math.random() * 100, force3D:true, ease:Linear.easeNone}, "-=0.7")
.to(svg, 0.8, { alpha:0 }) //Fade out
//Add rotation tween to collection
tweens.push(
TweenMax.to(svg, Math.random() * 30 + 10, { repeat: -1, rotationZ:360, rotationX:360, rotationY:360, ease:Linear.easeNone})
);
}
//Check and create new particle
PEmitter.prototype.cast = function( emitterInterval ){
//Check if all particles have been created
if(this.particles >= this.pCount){
window.clearInterval( emitterInterval );
return;
}
//Create new particle
this.create();
//Increase particles count
this.particles ++;
}
//************************************************
//MOUSE
window.addEventListener("mousemove", function( e ){
var mRatio = 150; //Mouse action range
var hoverTimeScale = 15; //Time scale multiplyer
//Check interaction
for (var i in tweens) {
var tBounding = tweens[i].target.getBoundingClientRect(), //Target bouding box
a = ( tBounding.top + (tBounding.height/2)) - (e.clientY - (mRatio/2) ), //Target point A
b = ( tBounding.left + (tBounding.width/2)) - (e.clientX - (mRatio/2) ), //Target point B
distance = Math.sqrt( a*a + b*b ); //Distance btween the two points
if( distance < mRatio ){ //Mouse is inside given ratio
if (tweens[i].timeScale() != hoverTimeScale) {
tweens[i].timeScale(hoverTimeScale); //Change rotation velocity
TweenMax.to(tweens[i].target, 0.5, {scale: .5 }); //Change particle scale
};
}else{
if (tweens[i].timeScale() != 1) {
tweens[i].timeScale(1); //Return to original velocity
TweenMax.to(tweens[i].target, 0.8, { scale:1 }); //Return to original scale
};
}
};
});
//************************************************