<!DOCTYPE html> |
< html > |
< head > |
< title ></ title > |
< script src = "js/jquery.min.js" ></ script > |
</ head > |
< style > |
* { |
padding: 0; |
margin: 0; |
} |
html, |
body { |
height: 100%; |
padding: 0; |
margin: 0; |
background: #000; |
} |
.aa { |
position: fixed; |
left: 50%; |
bottom: 10px; |
color: #ccc; |
} |
.container { |
width: 100%; |
height: 100%; |
} |
canvas { |
z-index: 99; |
position: absolute; |
width: 100%; |
height: 100%; |
} |
</ style > |
< body > |
<!-- 樱花 --> |
< div id = "jsi-cherry-container" class = "container" > |
< audio autoplay = "autopaly" > |
< source src = "renxi.mp3" type = "audio/mp3" /> |
</ audio > |
< img class = "img" src = "./123.png" alt = "" /> |
<!-- 爱心 --> |
< canvas id = "pinkboard" class = "container" > </ canvas > |
</ div > |
</ body > |
</ html > |
< script > |
/* |
* Settings |
*/ |
var settings = { |
particles: { |
length: 500, |
duration: 2, |
velocity: 100, |
effect: -0.75, |
size: 30, |
}, |
}; |
(function () { |
var b = 0; |
var c = ["ms", "moz", "webkit", "o"]; |
for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) { |
window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; |
window.cancelAnimationFrame = |
window[c[a] + "CancelAnimationFrame"] || |
window[c[a] + "CancelRequestAnimationFrame"]; |
} |
if (!window.requestAnimationFrame) { |
window.requestAnimationFrame = function (h, e) { |
var d = new Date().getTime(); |
var f = Math .max(0, 16 - (d - b)); |
var g = window .setTimeout(function () { |
h(d + f); |
}, f); |
b = d + f; |
return g; |
}; |
} |
if (!window.cancelAnimationFrame) { |
window.cancelAnimationFrame = function (d) { |
clearTimeout(d); |
}; |
} |
})(); |
/* |
*Point class |
*/ |
var Point = (function () { |
function Point(x, y) { |
this.x = typeof x !== "undefined" ? x : 0; |
this.y = typeof y !== "undefined" ? y : 0; |
} |
Point.prototype.clone = function () { |
return new Point(this.x, this.y); |
}; |
Point.prototype.length = function (length) { |
if (typeof length == "undefined") |
return Math.sqrt(this.x * this.x + this.y * this.y); |
this.normalize(); |
this.x *= length; |
this.y *= length; |
return this; |
}; |
Point.prototype.normalize = function () { |
var length = this .length(); |
this.x /= length; |
this.y /= length; |
return this; |
}; |
return Point; |
})(); |
/* |
* Particle class |
*/ |
var Particle = (function () { |
function Particle() { |
this.position = new Point(); |
this.velocity = new Point(); |
this.acceleration = new Point(); |
this.age = 0 ; |
} |
Particle.prototype.initialize = function (x, y, dx, dy) { |
this.position.x = x; |
this.position.y = y; |
this.velocity.x = dx ; |
this.velocity.y = dy ; |
this.acceleration.x = dx * settings.particles.effect; |
this.acceleration.y = dy * settings.particles.effect; |
this.age = 0 ; |
}; |
Particle.prototype.update = function (deltaTime) { |
this.position.x += this.velocity.x * deltaTime; |
this.position.y += this.velocity.y * deltaTime; |
this.velocity.x += this.acceleration.x * deltaTime; |
this.velocity.y += this.acceleration.y * deltaTime; |
this.age += deltaTime; |
}; |
Particle.prototype.draw = function (context, image) { |
function ease(t) { |
return --t * t * t + 1; |
} |
var size = image .width * ease(this.age / settings.particles.duration); |
context.globalAlpha = 1 - this.age / settings.particles.duration; |
context.drawImage( |
image, |
this.position.x - size / 2, |
this.position.y - size / 2, |
size, |
size |
); |
}; |
return Particle; |
})(); |
/* |
* ParticlePool class |
*/ |
var ParticlePool = (function () { |
var particles, |
firstActive = 0 , |
firstFree = 0 , |
duration = settings .particles.duration; |
function ParticlePool(length) { |
// create and populate particle pool |
particles = new Array(length); |
for (var i = 0 ; i < particles.length; i++) |
particles[i] = new Particle(); |
} |
ParticlePool.prototype.add = function (x, y, dx, dy) { |
particles[firstFree].initialize(x, y, dx, dy); |
// handle circular queue |
firstFree++; |
if (firstFree == particles.length) firstFree = 0 ; |
if (firstActive == firstFree) firstActive++; |
if (firstActive == particles.length) firstActive = 0 ; |
}; |
ParticlePool.prototype.update = function (deltaTime) { |
var i; |
// update active particles |
if (firstActive < firstFree) { |
for ( i = firstActive ; i < firstFree; i++) |
particles[i].update(deltaTime); |
} |
if (firstFree < firstActive) { |
for ( i = firstActive ; i < particles.length; i++) |
particles[i].update(deltaTime); |
for ( i = 0 ; i < firstFree; i++) particles[i].update(deltaTime); |
} |
|
// remove inactive particles |
while ( |
particles[firstActive].age >= duration && |
firstActive != firstFree |
) { |
firstActive++; |
if (firstActive == particles.length) firstActive = 0; |
} |
}; |
ParticlePool.prototype.draw = function (context, image) { |
// draw active particles |
if (firstActive < firstFree ) { |
for ( i = firstActive ; i < firstFree; i++) |
particles[i].draw(context, image); |
} |
if (firstFree < firstActive) { |
for ( i = firstActive ; i < particles.length; i++) |
particles[i].draw(context, image); |
for ( i = 0 ; i < firstFree; i++) particles[i].draw(context, image); |
} |
}; |
return ParticlePool; |
})(); |
/* |
* Putting it all together |
*/ |
(function (canvas) { |
var context = canvas .getContext("2d"), |
particles = new ParticlePool(settings.particles.length), |
particleRate = |
settings .particles.length / settings.particles.duration, // particles/sec |
time; |
|
// get point on heart with -PI <= t <= PI |
function pointOnHeart(t) { |
return new Point( |
160 * Math.pow(Math.sin(t), 3), |
130 * Math.cos(t) - |
50 * Math.cos(2 * t) - |
20 * Math.cos(3 * t) - |
10 * Math.cos(4 * t) + |
25 |
); |
} |
// creating the particle image using a dummy canvas |
var image = (function () { |
var canvas = document .createElement("canvas"), |
context = canvas .getContext("2d"); |
canvas.width = settings .particles.size; |
canvas.height = settings .particles.size; |
// helper function to create the path |
function to(t) { |
var point = pointOnHeart (t); |
point.x = |
settings .particles.size / 2 + |
(point.x * settings.particles.size) / 350; |
point.y = |
settings .particles.size / 2 - |
(point.y * settings.particles.size) / 350; |
return point; |
} |
// create the path |
context.beginPath(); |
var t = -Math.PI; |
var point = to (t); |
context.moveTo(point.x, point.y); |
while (t < Math.PI) { |
t += 0.01; // baby steps! |
point = to (t); |
context.lineTo(point.x, point.y); |
} |
context.closePath(); |
// create the fill |
context.fillStyle = "#ea80b0" ; |
context.fill(); |
// create the image |
var image = new Image(); |
image.src = canvas .toDataURL(); |
return image; |
})(); |
// render that thing! |
function render() { |
// next animation frame |
requestAnimationFrame(render); |
// update time |
var newTime = new Date().getTime() / 1000, |
deltaTime = newTime - (time || newTime); |
time = newTime ; |
// clear canvas |
context.clearRect(0, 0, canvas.width, canvas.height); |
// create new particles |
var amount = particleRate * deltaTime; |
for (var i = 0 ; i < amount; i++) { |
var pos = pointOnHeart (Math.PI - 2 * Math.PI * Math.random()); |
var dir = pos .clone().length(settings.particles.velocity); |
particles.add( |
canvas.width / 2 + pos.x, |
canvas.height / 2 - pos.y, |
dir.x, |
-dir.y |
); |
} |
// update and draw particles |
particles.update(deltaTime); |
particles.draw(context, image); |
} |
// handle (re-)sizing of the canvas |
function onResize() { |
canvas.width = canvas.clientWidth; |
canvas.height = canvas.clientHeight; |
} |
window.onresize = onResize ; |
// delay rendering bootstrap |
setTimeout(function () { |
onResize(); |
render(); |
}, 10); |
})(document.getElementById("pinkboard")); |
</script> |
< script > |
var RENDERER = { |
INIT_CHERRY_BLOSSOM_COUNT: 30, |
MAX_ADDING_INTERVAL: 10, |
init: function () { |
this.setParameters(); |
this.reconstructMethods(); |
this.createCherries(); |
this.render(); |
if ( |
navigator.userAgent.match( |
/(phone|pod|iPhone|iPod|ios|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i |
) |
) { |
} |
}, |
setParameters: function () { |
this.$container = $("#jsi-cherry-container"); |
this.width = this.$container.width(); |
this.height = this.$container.height(); |
this.context = $("< canvas />") |
.attr({ width: this.width, height: this.height }) |
.appendTo(this.$container) |
.get(0) |
var rate = this.FOCUS_POSITION / (this.z + this.FOCUS_POSITION), |
x = this.renderer.width / 2 + this.x * rate, |
y = this.renderer.height / 2 - this.y * rate; |
return { rate: rate, x: x, y: y }; |
}, |
} |
$(function () { |
RENDERER.init(); |
}); |
</ script > |