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/* Any JavaScript here will be loaded for all users on every page load. */
$(function() {
// default is varying levels of transparent white sparkles
$(".sparkley:first").sparkleh();
// rainbow as a color generates random rainbow colros
// count determines number of sparkles
// overlap allows sparkles to migrate... watch out for other dom elements though.
$("a").sparkleh({
color: "rainbow",
count: 35,
speed: 2,
overlap: 15
});
$("p").sparkleh({
count: 80,
color: "rainbow"
});
// an array can be passed, too for colours
// for an image, the image needs to be fully loaded to set
// the canvas to it's height/width.
// speed allows us to control... the ... velocity
});
$.fn.sparkleh = function( options ) {
return this.each( function(k,v) {
var $this = $(v).css("position","relative");
var settings = $.extend({
width: $this.outerWidth(),
height: $this.outerHeight(),
color: "#FFFFFF",
count: 30,
overlap: 0,
speed: 1
}, options );
var sparkle = new Sparkle( $this, settings );
$this.on({
"mouseover focus" : function(e) {
sparkle.over();
},
"mouseout blur" : function(e) {
sparkle.out();
}
});
});
}
function Sparkle( $parent, options ) {
this.options = options;
this.init( $parent );
}
Sparkle.prototype = {
"init" : function( $parent ) {
var _this = this;
this.$canvas =
$("<canvas>")
.addClass("sparkle-canvas")
.css({
position: "absolute",
top: "-"+_this.options.overlap+"px",
left: "-"+_this.options.overlap+"px",
"pointer-events": "none"
})
.appendTo($parent);
this.canvas = this.$canvas[0];
this.context = this.canvas.getContext("2d");
this.sprite = new Image();
this.sprites = [0,6,13,20];
this.sprite.src = this.datauri;
this.canvas.width = this.options.width + ( this.options.overlap * 2);
this.canvas.height = this.options.height + ( this.options.overlap * 2);
this.particles = this.createSparkles( this.canvas.width , this.canvas.height );
this.anim = null;
this.fade = false;
},
"createSparkles" : function( w , h ) {
var holder = [];
for( var i = 0; i < this.options.count; i++ ) {
var color = this.options.color;
if( this.options.color == "rainbow" ) {
color = '#'+ ('000000' + Math.floor(Math.random()*16777215).toString(16)).slice(-6);
} else if( $.type(this.options.color) === "array" ) {
color = this.options.color[ Math.floor(Math.random()*this.options.color.length) ];
}
holder[i] = {
position: {
x: Math.floor(Math.random()*w),
y: Math.floor(Math.random()*h)
},
style: this.sprites[ Math.floor(Math.random()*4) ],
delta: {
x: Math.floor(Math.random() * 1000) - 500,
y: Math.floor(Math.random() * 1000) - 500
},
size: parseFloat((Math.random()*2).toFixed(2)),
color: color
};
}
return holder;
},
"draw" : function( time, fade ) {
var ctx = this.context;
ctx.clearRect( 0, 0, this.canvas.width, this.canvas.height );
for( var i = 0; i < this.options.count; i++ ) {
var derpicle = this.particles[i];
var modulus = Math.floor(Math.random()*7);
if( Math.floor(time) % modulus === 0 ) {
derpicle.style = this.sprites[ Math.floor(Math.random()*4) ];
}
ctx.save();
ctx.globalAlpha = derpicle.opacity;
ctx.drawImage(this.sprite, derpicle.style, 0, 7, 7, derpicle.position.x, derpicle.position.y, 7, 7);
if( this.options.color ) {
ctx.globalCompositeOperation = "source-atop";
ctx.globalAlpha = 0.5;
ctx.fillStyle = derpicle.color;
ctx.fillRect(derpicle.position.x, derpicle.position.y, 7, 7);
}
ctx.restore();
}
},
"update" : function() {
var _this = this;
this.anim = window.requestAnimationFrame( function(time) {
for( var i = 0; i < _this.options.count; i++ ) {
var u = _this.particles[i];
var randX = ( Math.random() > Math.random()*2 );
var randY = ( Math.random() > Math.random()*3 );
if( randX ) {
u.position.x += ((u.delta.x * _this.options.speed) / 1500);
}
if( !randY ) {
u.position.y -= ((u.delta.y * _this.options.speed) / 800);
}
if( u.position.x > _this.canvas.width ) {
u.position.x = -7;
} else if ( u.position.x < -7 ) {
u.position.x = _this.canvas.width;
}
if( u.position.y > _this.canvas.height ) {
u.position.y = -7;
u.position.x = Math.floor(Math.random()*_this.canvas.width);
} else if ( u.position.y < -7 ) {
u.position.y = _this.canvas.height;
u.position.x = Math.floor(Math.random()*_this.canvas.width);
}
if( _this.fade ) {
u.opacity -= 0.02;
} else {
u.opacity -= 0.005;
}
if( u.opacity <= 0 ) {
u.opacity = ( _this.fade ) ? 0 : 1;
}
}
_this.draw( time );
if( _this.fade ) {
_this.fadeCount -= 1;
if( _this.fadeCount < 0 ) {
window.cancelAnimationFrame( _this.anim );
} else {
_this.update();
}
} else {
_this.update();
}
});
},
"cancel" : function() {
this.fadeCount = 100;
},
"over" : function() {
window.cancelAnimationFrame( this.anim );
for( var i = 0; i < this.options.count; i++ ) {
this.particles[i].opacity = Math.random();
}
this.fade = false;
this.update();
},
"out" : function() {
this.fade = true;
this.cancel();
},
"datauri" : "data:image/png;base64,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"
};
// $('img.photo',this).imagesLoaded(myFunction)
// execute a callback when all images have loaded.
// needed because .load() doesn't work on cached images
// mit license. paul irish. 2010.
// webkit fix from Oren Solomianik. thx!
// callback function is passed the last image to load
// as an argument, and the collection as `this`
$.fn.imagesLoaded = function(callback){
var elems = this.filter('img'),
len = elems.length,
blank = "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==";
elems.bind('load.imgloaded',function(){
if (--len <= 0 && this.src !== blank){
elems.unbind('load.imgloaded');
callback.call(elems,this);
}
}).each(function(){
// cached images don't fire load sometimes, so we reset src.
if (this.complete || this.complete === undefined){
var src = this.src;
// webkit hack from https://groups.google.com/group/jquery-dev/browse_thread/thread/eee6ab7b2da50e1f
// data uri bypasses webkit log warning (thx doug jones)
this.src = blank;
this.src = src;
}
});
return this;
};