Gần đây mạng xã hội truyền tai nhau thông tin về code trái tim đập tỏ tình với crush rất đẹp mắt, nay theo yêu cầu của vợ mình nên mình sẽ làm 1 cái cho biết.
1. Mẫu 1.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> Trai tim </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<link rel="stylesheet" href="style.css">
<style>
html, body {
height: 100%;
padding: 0;
margin: 0;
background: rgba(0, 0, 0, 0.851);
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}
</style>
</HEAD>
<BODY>
<div class="box">
<canvas id="pinkboard"></canvas>
</div>
<script>
var settings = {
particles: {
length: 10000, // maximum amount of particles
duration: 4, // particle duration in sec
velocity: 80, // particle velocity in pixels/sec
effect: -1.3, // play with this for a nice effect
size: 8, // particle size in pixels
},
};
/*
*/
(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 = '#f50b02';
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>2. Mẫu 2.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<style>
html, body {
height: 100%;
padding: 0;
margin: 0;
background: #000;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}
</style>
</HEAD>
<BODY>
<canvas id="pinkboard"></canvas>
<script>
/*
* Settings
*/
var settings = {
particles: {
length: 500, // maximum amount of particles
duration: 2, // particle duration in sec
velocity: 100, // particle velocity in pixels/sec
effect: -0.75, // play with this for a nice effect
size: 30, // particle size in pixels
},
};
/*
* RequestAnimationFrame polyfill by Erik Möller
*/
(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>
</BODY>
</HTML>3. Mẫu 3.
Tạo file index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Montserrat:wght@200;300;400;600&display=swap" rel="stylesheet">
<link href="css/main.css" rel="stylesheet">
</head>
<body>
<!-- <audio autoplay="autopaly">
<source src="renxi.mp3" type="audio/mp3" />
</audio> -->
<!-- 星空html -->
<!-- <div> -->
<div class="container2">
<div class="content">
<canvas id="universe"></canvas>
</div>
</div>
<!-- </div> -->
<div class="title">
<!-- EDIT HERE -->
<h3 class="STARDUST1">12/12/2020</h3>
<h1 class="STARDUST2">HOANG & NHUNG</h1>
<h3 class="STARDUST3">L O V E <strong>❤</strong> Y O U</h3>
<img class="img" src="hoanghd.jpeg" alt="JUNO_OKYO" />
<canvas id="pinkboard"></canvas>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="js/main.js"></script>
<script src="js/particle.js"></script>
<script src="js/universe.js"></script>
</body>
</html>Tạo thư mục css và sau đó tạo file main.css nằm trong thư mục css.
.more-pens {
position: fixed;
left: 20px;
bottom: 20px;
z-index: 10;
font-family: "Montserrat";
font-size: 12px;
}
a.white-mode, a.white-mode:link, a.white-mode:visited, a.white-mode:active {
font-family: "Montserrat";
font-size: 12px;
text-decoration: none; /* background: #212121; */
padding: 4px 8px;
color: #f7f7f7;
}
a.white-mode:hover, a.white-mode:link:hover, a.white-mode:visited:hover, a.white-mode:active:hover {
background: #edf3f8;
color: #212121;
}
.title {
z-index: 9999 !important;
position: absolute;
left: 50%;
top: 42%;
transform: translateX(-50%) translateY(-50%);
font-family: "Montserrat";
text-align: center;
width: 100%;
}
.title h1 {
z-index: 99;
position: relative;
color: #fff;
font-weight: 100;
font-size: 70px;
padding: 0;
margin: 0;
line-height: 1;
text-shadow: 0 0 10px #ff006c, 0 0 20px #ff006c, 0 0 30px #ff006c, 0 0 40px #ff417d, 0 0 70px #ff417d, 0 0 80px #ff417d, 0 0 100px #ff417d, 0 0 150px #ff417d;
}
.title h1 span {
z-index: 99;
font-weight: 600;
padding: 0;
margin: 0;
color: #ffffff;
}
.title h3 {
z-index: 99;
font-weight: 200;
font-size: 26px;
padding: 0;
margin: 0;
line-height: 1;
color: #ffffff;
letter-spacing: 2px;
}
/* 爱心css */
canvas {
position: absolute;
width: 100%;
height: 100%;
}
.img {
position: absolute;
left: 50%;
top: 60%;
transform: translate(-50%, -50%);
width: 420px;
height: 420px;
}
#pinkboard {
position: relative;
top: 0%;
left: 0%;
height: 429px;
}
.STARDUST1 {
position: relative !important;
top: -60px;
}
.STARDUST2 {
position: relative !important;
top: -40px;
}
.STARDUST3 {
position: relative !important;
top: -20px;
}
/* 星空css */
html, body {
padding: 0px;
margin: 0px;
width: 100%;
height: 100%;
position: fixed;
}
body {
display: flex;
justify-content: center;
align-items: center;
-webkit-filter: contrast(120%);
filter: contrast(120%);
background-image: radial-gradient(1600px at 70% 120%, rgba(33, 39, 80, 1) 10%, #020409 100%) !important; /* background-color: black; */
}
.container2 {
/* z-index: 8; */
position: absolute;
width: 100%;
height: 100%;
background-image: radial-gradient(1600px at 70% 120%, rgba(33, 39, 80, 1) 10%, #020409 100%) !important;
}
.content {
width: inherit;
height: inherit;
width: 100%;
height: 100%;
background-image: radial-gradient(1600px at 70% 120%, rgba(33, 39, 80, 1) 10%, #020409 100%) !important;
}
#universe {
width: 100%;
height: 100%;
}
#footerContent {
font-family: sans-serif;
font-size: 110%;
color: rgba(200, 220, 255, 0.3);
width: 100%;
position: fixed;
bottom: 0px;
padding: 20px;
text-align: center;
z-index: 20;
}
/* #footer {
position: absolute;
bottom: 0px;
height: 300px;
width: 100%;
} */
#scene {
height: 100%;
position: absolute;
left: 50%;
margin-left: -800px;
}
a {
text-decoration: none;
color: rgba(200, 220, 255, 1);
opacity: 0.4;
transition: opacity 0.4s ease;
}
a:hover {
opacity: 1;
}
/* heart image: https://stackoverflow.com/a/51216413 */
img {
/* width: 200px; */
aspect-ratio: 1;
object-fit: cover;
--_m: radial-gradient(#000 69%, #0000 70%) 84.5% fill/100%;
-webkit-mask-box-image: var(--_m);
mask-border: var(--_m);
clip-path: polygon(-41% 0, 50% 91%, 141% 0);
}
Tại thư mục gốc hãy tạo thư mục js và sau đó bạn hãy tạo 3 file main.js, particle.js, universe.js nằm trong thư mục js.
– Nội dung file main.js.
let particles = [];
let microparticles = [];
const c1 = createCanvas({
width: $(window).width(),
height: $(window).height(),
});
const tela = c1.canvas;
const canvas = c1.context;
// $("body").append(tela);
$("body").append(c1.canvas);
class Particle1 {
constructor(canvas) {
this.random = Math.random();
this.random1 = Math.random();
this.random2 = Math.random();
this.progress = 0;
this.canvas = canvas;
this.life = 1000 + Math.random() * 3000;
this.x =
$(window).width() / 2 + (Math.random() * 20 - Math.random() * 20);
this.y = $(window).height();
this.s = 2 + Math.random();
this.w = $(window).width();
this.h = $(window).height();
this.direction = this.random > 0.5 ? -1 : 1;
this.radius = 1 + 3 * this.random;
this.color = "#ff417d";
this.ID = setInterval(
function() {
microparticles.push(
new microParticle(c1.context, {
x: this.x,
y: this.y,
})
);
}.bind(this),
this.random * 20
);
setTimeout(
function() {
clearInterval(this.ID);
}.bind(this),
this.life
);
}
render() {
this.canvas.beginPath();
this.canvas.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
// this.canvas.lineWidth = 2;
this.canvas.shadowOffsetX = 0;
this.canvas.shadowOffsetY = 0;
// this.canvas.shadowBlur = 6;
this.canvas.shadowColor = "#000000";
this.canvas.fillStyle = this.color;
this.canvas.fill();
this.canvas.closePath();
}
move() {
this.x -=
this.direction *
Math.sin(this.progress / (this.random1 * 430)) *
this.s;
this.y -= Math.cos(this.progress / this.h) * this.s;
if (this.x < 0 || this.x > this.w - this.radius) {
clearInterval(this.ID);
return false;
}
if (this.y < 0) {
clearInterval(this.ID);
return false;
}
this.render();
this.progress++;
return true;
}
}
class microParticle {
constructor(canvas, options) {
this.random = Math.random();
this.random1 = Math.random();
this.random2 = Math.random();
this.progress = 0;
this.canvas = canvas;
this.x = options.x;
this.y = options.y;
this.s = 2 + Math.random() * 3;
this.w = $(window).width();
this.h = $(window).height();
this.radius = 1 + this.random * 0.5;
this.color = "#4EFCFE"; //this.random > .5 ? "#a9722c" : "#FFFED7"
}
render() {
this.canvas.beginPath();
this.canvas.arc(this.x, this.y, this.radius, 0, 2 * Math.PI);
this.canvas.lineWidth = 2;
this.canvas.fillStyle = this.color;
this.canvas.fill();
this.canvas.closePath();
}
move() {
this.x -=
Math.sin(this.progress / (100 / (this.random1 - this.random2 * 10))) *
this.s;
this.y += Math.cos(this.progress / this.h) * this.s;
if (this.x < 0 || this.x > this.w - this.radius) {
return false;
}
if (this.y > this.h) {
return false;
}
this.render();
this.progress++;
return true;
}
}
var random_life = 1000;
setInterval(
function() {
particles.push(new Particle1(canvas));
random_life = 2000 * Math.random();
}.bind(this),
random_life
);
function clear() {
let grd = canvas.createRadialGradient(
tela.width / 2,
tela.height / 2,
0,
tela.width / 2,
tela.height / 2,
tela.width
);
grd.addColorStop(0, "rgba(20,20,20,1)");
grd.addColorStop(1, "rgba(0,0,0,0)");
// Fill with gradient
canvas.globalAlpha = 0.16;
canvas.fillStyle = grd;
canvas.fillRect(0, 0, tela.width, tela.height);
}
function blur(ctx, canvas, amt) {
// ctx.filter = `blur(${amt}px)`
// ctx.drawImage(canvas, 0, 0)
// ctx.filter = 'none'
}
function update() {
clear();
particles = particles.filter(function(p) {
return p.move();
});
microparticles = microparticles.filter(function(mp) {
return mp.move();
});
requestAnimationFrame(update.bind(this));
}
function createCanvas(properties) {
let canvas = document.createElement("canvas");
canvas.width = properties.width;
// canvas.style.zIndex = 999;
canvas.height = properties.height;
let context = canvas.getContext("2d");
return {
canvas: canvas,
context: context,
};
}
update();– Nội dung file particle.js.
/*
* Settings
*/
var settings = {
particles: {
length: 500, // maximum amount of particles
duration: 2, // particle duration in sec
velocity: 100, // particle velocity in pixels/sec
effect: -0.75, // play with this for a nice effect
size: 30, // particle size in pixels
},
};
/*
* RequestAnimationFrame polyfill by Erik M?ller
*/
(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"));– Nội dung file universe.js.
window.requestAnimationFrame =
window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame;
this.draw = function() {
universe.beginPath();
if (this.giant) {
universe.fillStyle = "rgba(" + giantColor + "," + this.opacity + ")";
universe.arc(this.x, this.y, 2, 0, 2 * Math.PI, false);
} else if (this.comet) {
universe.fillStyle = "rgba(" + cometColor + "," + this.opacity + ")";
universe.arc(this.x, this.y, 1.5, 0, 2 * Math.PI, false);
//comet tail
for (var i = 0; i < 30; i++) {
universe.fillStyle =
"rgba(" +
cometColor +
"," +
(this.opacity - (this.opacity / 20) * i) +
")";
universe.rect(
this.x - (this.dx / 4) * i,
this.y - (this.dy / 4) * i - 2,
2,
2
);
universe.fill();
}
} else {
universe.fillStyle = "rgba(" + starColor + "," + this.opacity + ")";
universe.rect(this.x, this.y, this.r, this.r);
}
universe.closePath();
universe.fill();
};
this.move = function() {
this.x += this.dx;
this.y += this.dy;
if (this.fadingOut === false) {
this.reset();
}
if (this.x > width - width / 4 || this.y < 0) {
this.fadingOut = true;
}
};
(function() {
setTimeout(function() {
first = false;
}, 50);
})();
function getProbability(percents) {
return Math.floor(Math.random() * 1000) + 1 < percents * 10;
}
function getRandInterval(min, max) {
return Math.random() * (max - min) + min;
}
function windowResizeHandler() {
width = window.innerWidth;
height = window.innerHeight;
starCount = width * starDensity;
circleRadius = width > height ? height / 2 : width / 2;
circleCenter = {
x: width / 2,
y: height / 2,
};
canva.setAttribute("width", width);
canva.setAttribute("height", height);
}
