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index.html
浏览文件 @ 983ec7d7
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>爱的魔力转圈圈</title>
<meta name="Generator" content="EditPlus" />
<meta name="Author" content="YouHao" />
<meta name="Keywords" content="爱心_前端特效" />
<meta name="Description" content="前端项目开源爱心特效" />
<style>
html,
body {
height: 100%;
padding: 0;
margin: 0;
background: #abcdef;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}
</style>
</head>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <body>
<HTML> <canvas id="pinkboard"></canvas>
<HEAD> <script>
<TITLE> 爱的魔力转圈圈 </TITLE> /*
<META NAME="Generator" CONTENT="EditPlus"> * Settings
<META NAME="Author" CONTENT=""> */
<META NAME="Keywords" CONTENT=""> var settings = {
<META NAME="Description" CONTENT=""> particles: {
<style> length: 500, // maximum amount of particles
html, body { duration: 2, // particle duration in sec
height: 100%; velocity: 100, // particle velocity in pixels/sec
padding: 0; effect: -0.75, // play with this for a nice effect
margin: 0; size: 30, // particle size in pixels
background: #fff; },
} };
canvas {
position: absolute;
width: 100%;
height: 100%;
}
</style>
</HEAD>
<BODY> /*
<canvas id="pinkboard"></canvas> * RequestAnimationFrame polyfill by Erik Möller
<script> */
/* (function () {
* Settings var b = 0;
*/ var c = ["ms", "moz", "webkit", "o"];
var settings = { for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) {
particles: { window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"];
length: 500, // maximum amount of particles window.cancelAnimationFrame =
duration: 2, // particle duration in sec window[c[a] + "CancelAnimationFrame"] ||
velocity: 100, // particle velocity in pixels/sec window[c[a] + "CancelRequestAnimationFrame"];
effect: -0.75, // play with this for a nice effect }
size: 30, // particle size in pixels 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);
};
}
})();
/* /*
* RequestAnimationFrame polyfill by Erik Möller * Point class
*/ */
(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)}}}()); 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;
})();
/* /*
* Point class * Particle class
*/ */
var Point = (function() { var Particle = (function () {
function Point(x, y) { function Particle() {
this.x = (typeof x !== 'undefined') ? x : 0; this.position = new Point();
this.y = (typeof y !== 'undefined') ? y : 0; this.velocity = new Point();
} this.acceleration = new Point();
Point.prototype.clone = function() { this.age = 0;
return new Point(this.x, this.y); }
}; Particle.prototype.initialize = function (x, y, dx, dy) {
Point.prototype.length = function(length) { this.position.x = x;
if (typeof length == 'undefined') this.position.y = y;
return Math.sqrt(this.x * this.x + this.y * this.y); this.velocity.x = dx;
this.normalize(); this.velocity.y = dy;
this.x *= length; this.acceleration.x = dx * settings.particles.effect;
this.y *= length; this.acceleration.y = dy * settings.particles.effect;
return this; this.age = 0;
}; };
Point.prototype.normalize = function() { Particle.prototype.update = function (deltaTime) {
var length = this.length(); this.position.x += this.velocity.x * deltaTime;
this.x /= length; this.position.y += this.velocity.y * deltaTime;
this.y /= length; this.velocity.x += this.acceleration.x * deltaTime;
return this; this.velocity.y += this.acceleration.y * deltaTime;
}; this.age += deltaTime;
return Point; };
})(); 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;
})();
/* /*
* Particle class * ParticlePool class
*/ */
var Particle = (function() { var ParticlePool = (function () {
function Particle() { var particles,
this.position = new Point(); firstActive = 0,
this.velocity = new Point(); firstFree = 0,
this.acceleration = new Point(); duration = settings.particles.duration;
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;
})();
/* function ParticlePool(length) {
* ParticlePool class // create and populate particle pool
*/ particles = new Array(length);
var ParticlePool = (function() { for (var i = 0; i < particles.length; i++)
var particles, particles[i] = new Particle();
firstActive = 0, }
firstFree = 0, ParticlePool.prototype.add = function (x, y, dx, dy) {
duration = settings.particles.duration; particles[firstFree].initialize(x, y, dx, dy);
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;
})();
/* // handle circular queue
* Putting it all together firstFree++;
*/ if (firstFree == particles.length) firstFree = 0;
(function(canvas) { if (firstActive == firstFree) firstActive++;
var context = canvas.getContext('2d'), if (firstActive == particles.length) firstActive = 0;
particles = new ParticlePool(settings.particles.length), };
particleRate = settings.particles.length / settings.particles.duration, // particles/sec ParticlePool.prototype.update = function (deltaTime) {
time; var i;
// 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 = 'red';
context.fill(); // update active particles
// create the image if (firstActive < firstFree) {
var image = new Image(); for (i = firstActive; i < firstFree; i++)
image.src = canvas.toDataURL(); particles[i].update(deltaTime);
return image; }
})(); if (firstFree < firstActive) {
for (i = firstActive; i < particles.length; i++)
// render that thing! particles[i].update(deltaTime);
function render() { for (i = 0; i < firstFree; i++) particles[i].update(deltaTime);
// next animation frame }
requestAnimationFrame(render);
// remove inactive particles
// update time while (
var newTime = new Date().getTime() / 1000, particles[firstActive].age >= duration &&
deltaTime = newTime - (time || newTime); firstActive != firstFree
time = newTime; ) {
firstActive++;
// clear canvas if (firstActive == particles.length) firstActive = 0;
context.clearRect(0, 0, canvas.width, canvas.height); }
};
// create new particles ParticlePool.prototype.draw = function (context, image) {
var amount = particleRate * deltaTime; // draw active particles
for (var i = 0; i < amount; i++) { if (firstActive < firstFree) {
var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random()); for (i = firstActive; i < firstFree; i++)
var dir = pos.clone().length(settings.particles.velocity); particles[i].draw(context, image);
particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y); }
} if (firstFree < firstActive) {
for (i = firstActive; i < particles.length; i++)
// update and draw particles particles[i].draw(context, image);
particles.update(deltaTime); for (i = 0; i < firstFree; i++) particles[i].draw(context, image);
particles.draw(context, image); }
} };
return ParticlePool;
// handle (re-)sizing of the canvas })();
function onResize() {
canvas.width = canvas.clientWidth; /*
canvas.height = canvas.clientHeight; * Putting it all together
} */
window.onresize = onResize; (function (canvas) {
var context = canvas.getContext("2d"),
// delay rendering bootstrap particles = new ParticlePool(settings.particles.length),
setTimeout(function() { particleRate =
onResize(); settings.particles.length / settings.particles.duration, // particles/sec
render(); time;
}, 10);
})(document.getElementById('pinkboard')); // get point on heart with -PI <= t <= PI
</script> function pointOnHeart(t) {
</BODY> return new Point(
</HTML> 160 * Math.pow(Math.sin(t), 3),
\ No newline at end of file 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 = "red";
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>
</body>
</html>
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