<script>
var Stage = function() {
function t(t, n, i) {
var e = this;
this.canvas = document.getElementById(t), this.ctx = this.canvas.getContext("2d"), this.renderList = [], this.needClear = !0, this.canvas.width = n || $(window).width(), this.canvas.height = i || $(window).height(), $(window).on("resize", function() {
e.canvas.width = n || $(window).width(), e.canvas.height = i || $(window).height()
})
}
return window.requestAnimationFrame = function() {
return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(t) {
window.setTimeout(t, 1e3 / 60)
}
}(), t.prototype.update = function() {
var t = this;
t.needClear && t.ctx.clearRect(0, 0, t.canvas.width, t.canvas.height), t.renderList.forEach(function(n) {
n(t.ctx, t.canvas)
}), requestAnimationFrame(function() {
t.update()
})
}, t.prototype.onUpdate = function(t) {
this.renderList.push(t)
}, t
}();;
var Twinkle = function() {
function t(t, e, a) {
this.initSymbols(t, e, a), this.particles = [], this._pool = [], this.mouse = new s
}
function s(t, s) {
this.x = t || 0, this.y = s || 0
}
function e(t, s, e) {
this.color = n(t), this.size = 2 * (s + e);
for(var a = 0, i = o.length; i > a; a++) this.push(this._createSymbol(o[a], s, e))
}
function a(t, s, e, a, i, o) {
this.init(t, s, e, a, i, o)
}
function i(t, s, e, a, i) {
return "rgba" === t ? "rgba(" + s + "," + e + "," + a + "," + i + ")" : "hsla" === t ? "hsla(" + s + "," + e + "%," + a + "%," + i + ")" : ""
}
if(!document.createElement("canvas").getContext) return $.noop;
var o = [4, 6, 8, 10, 12],
h = 2500;
t.prototype = {
mouse: null,
gravity: .035,
initSymbols: function(t, s, a) {
this._symbols = new e(t, s, a)
},
render: function(t) {
var s, e, a, i, o, n, r, l, p, c, d, m, u, y, g, f = this.particles,
v = this.mouse,
b = this.gravity,
M = this._symbols,
x = this._symbols.length,
_ = this._symbols.size,
w = .5 * this._symbols.size,
I = t.canvas.width,
$ = t.canvas.height;
if(s = Math.min(.005 * (v.speedX * v.speedX + v.speedY * v.speedY), 1), f.length < h)
for(e = .5 + 4.5 * s, a = .1 + .5 * s, i = .5 + .5 * s, y = (3 * Math.random() | 0) + (20 * s | 0), u = 0; y > u; u++) this._createParticle(a, e, i);
for(p = .5 * -I, c = 1.5 * I, d = .5 * -$, m = 1.5 * $, u = 0, y = f.length; y > u; u++) g = f[u], g.vx += .03 * v.speedX * s, g.vy += .03 * v.speedY * s + b, g.x += g.vx + v.speedX, g.y += g.vy + v.speedY, g.scale -= .005, g.angle += Math.random(), g.x + w < p || g.x - w > c || g.y + w < d || g.y - w > m || g.scale <= 0 ? (this._pool.push(g), f.splice(u, 1), y--, u--) : (l = g.scale, o = M[x * Math.random() | 0], Math.random() < .7 && (l *= .2), n = _ * l, r = .5 * n, t.save(), t.globalCompositeOperation = "lighter", t.translate(g.x, g.y), t.rotate(g.angle), t.drawImage(o, 0, 0, _, _, -r, -r, n, n), t.restore());
t.fill(), v.speedX = v.speedY = 0
},
_createParticle: function(t, s, e) {
var i = t + (s - t) * Math.random(),
o = 2 * Math.PI * Math.random(),
h = this._pool.length ? this._pool.shift() : new a;
h.init(this.mouse.x, this.mouse.y, i * Math.cos(o), i * Math.sin(o), e * Math.random(), 2 * Math.PI * Math.random()), this.particles.push(h)
}
}, s.prototype = {
x: 0,
y: 0,
speedX: 0,
speedY: 0,
update: function(t, s) {
this.speedX = .7 * (this.x - t), this.speedY = .7 * (this.y - s), this.x = t, this.y = s
}
}, e.prototype = [], e.prototype._createSymbol = function(t, s, e) {
var a, o, h = this.size,
n = this.size / 2,
r = this.color;
a = document.createElement("canvas"), a.width = a.height = h, o = a.getContext("2d"), o.fillStyle = i(r[0], r[1], r[2], r[3], r[4]), o.shadowBlur = e, o.shadowColor = i(r[0], r[1], r[2], r[3], .75 * r[4]);
var l, p, c, d;
for(o.beginPath(), l = 1, p = 2 * t; p >= l; l++) c = l % 2 ? .1 * s : s, d = 2 * Math.PI * l / p, o[1 === l ? "moveTo" : "lineTo"](n + c * Math.cos(d), n + c * Math.sin(d));
return o.fill(), a
}, a.prototype.init = function(t, s, e, a, i, o) {
this.x = t || 0, this.y = s || 0, this.vx = e || 0, this.vy = a || 0, this.scale = i || 0, this.angle = o || 0
};
var n = function() {
var t = /^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/,
s = /^rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d\.]+)\s*\)$/,
e = /^hsl\(\s*([\d\.]+)\s*,\s*([\d\.]+)%\s*,\s*([\d\.]+)%\s*\)$/,
a = /^hsla\(\s*([\d\.]+)\s*,\s*([\d\.]+)%\s*,\s*([\d\.]+)%\s*,\s*([\d\.]+)\s*\)$/,
i = /^([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/;
return function(o) {
o = o.replace(/^\s*#|\s*$/g, ""), o = o.toLowerCase();
var h;
return(h = o.match(t) || o.match(s)) ? ["rgba", parseInt(h[1], 10), parseInt(h[2], 10), parseInt(h[3], 10), parseFloat(4 === h.length ? 1 : h[4])] : (h = o.match(e) || o.match(a)) ? ["hsla", parseFloat(h[1]), parseFloat(h[2]), parseFloat(h[3]), parseFloat(4 === h.length ? 1 : h[4])] : (3 === o.length && (o = o.replace(/(.)/g, "$1$1")), (h = o.match(i)) ? ["rgba", parseInt(h[1], 16), parseInt(h[2], 16), parseInt(h[3], 16), 1] : null)
}
}();
return t
}();;
var Index = function() {
var h = function() {
return /(msie|trident)/.test(navigator.userAgent.toLowerCase())
};
if(!document.createElement("canvas").getContext || h()) return void $("canvas").remove();
var v = new Stage("stage1"),
m = new Twinkle("#fff", 14, 1);
m.mouse.update(0, 0), $(window).on("mousemove", function(e) {
m.mouse.update(e.clientX, e.clientY)
}), v.onUpdate(function(e) {
m.render(e)
}), v.update();
}();
</script>
