源码介绍
爱心流星雨背景_超好看
源码使用
下载解压安装包，双击【love.html】
源码下载
源码展示
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>爱心❤FJ</title>
<style >
html, body {
height: 100%;
padding: 0;
margin: 0;
background-color: black;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
}</style>
</head>
<body>
<a href="https://mp.weixin.qq.com/s/oxLqXBcLCT8ij67DjkW2kw" style="position: fixed; top: 5%; right: 10px; width: 30px; height: 30px; z-index: 1000; background: #696969; border-radius: 50%; padding: 1.0px; text-align: center; color: #ddd; text-decoration: none; line-height: 30px; font-size: 11px;">制作</a>
<a href="https://pan.quark.cn/s/3344d23e48a8" style="position: fixed; top: 20%; right: 10px; width: 30px; height: 30px; z-index: 997; background: #696969; border-radius: 50%; padding: 1.0px; text-align: center; color: #ddd; text-decoration: none; line-height: 30px; font-size: 11px;">源码</a>
<a href="https://drive.uc.cn/s/4819fdecb8a24" style="position: fixed; top: 15%; right: 10px; width: 30px; height: 30px; z-index: 998; background: #696969; border-radius: 50%; padding: 1.0px; text-align: center; color: #ddd; text-decoration: none; line-height: 30px; font-size: 11px;">代码</a>
<a href="https://pan.xunlei.com/s/VNlDcB3ABz0oNSOEv5mpSE_tA1?pwd=97rw#" style="position: fixed; top: 10%; right: 10px; width: 30px; height: 30px; z-index: 999; background: #696969; border-radius: 50%; padding: 1.0px; text-align: center; color: #ddd; text-decoration: none; line-height: 30px; font-size: 11px;">合集</a>
<a href="https://shop1619956412.v.weidian.com/?userid=1619956412&spider_token=2720" style="position: fixed; top: 25%; right: 10px; width: 30px; height: 30px; z-index: 996; background: #696969; border-radius: 50%; padding: 1.0px; text-align: center; color: #ddd; text-decoration: none; line-height: 30px; font-size: 11px;">红包</a>
<canvas id="pinkboard"></canvas>
<canvas id="stars"></canvas>
<script>
var context;
var arr = new Array();
var starCount = 800;
var rains = new Array();
var rainCount =20;
//初始化画布及context
function init(){
//获取canvas
var stars = document.getElementById("stars");
windowWidth = window.innerWidth; //当前的窗口的高度
stars.width=windowWidth;
stars.height=window.innerHeight;
//获取context
context = stars.getContext("2d");
}
//创建一个星星对象
var Star = function (){
this.x = windowWidth * Math.random();//横坐标
this.y = 5000 * Math.random();//纵坐标
this.text="❤";//文本
this.color = "#ea80b0";//颜色
//产生随机颜色
this.getColor=function(){
var _r = Math.random();
if(_r<0.5){
this.color = "#333";
}else{
this.color = "#ea80b0";
}
}
//初始化
this.init=function(){
this.getColor();
}
//绘制
this.draw=function(){
context.fillStyle=this.color;
context.fillText(this.text,this.x,this.y);
}
}
//页面加载的时候
window.onload = function() {
init();
//画星星
for (var i=0;i<starCount;i++) {
var star = new Star();
star.init();
star.draw();
arr.push(star);
}
//画流星
for (var i=0;i<rainCount;i++) {
var rain = new MeteorRain();
rain.init();
rain.draw();
rains.push(rain);
}
playStars();//绘制闪动的星星
playRains();//绘制流星
}
//星星闪起来
function playStars(){
for (var n = 0; n < starCount; n++){
arr[n].getColor();
arr[n].draw();
}
setTimeout("playStars()",100);
}
var MeteorRain = function(){
this.x = -1;
this.y = -1;
this.length = -1;//长度
this.angle = 30; //倾斜角度
this.width = -1;//宽度
this.height = -1;//高度
this.speed = 1;//速度
this.offset_x = -1;//横轴移动偏移量
this.offset_y = -1;//纵轴移动偏移量
this.alpha = 1; //透明度
this.color1 = "#ea80b0";//流星的色彩
this.color2 = ""; //流星的色彩
this.init = function () //初始化
{
this.getPos();
this.alpha = 1;//透明度
this.getRandomColor();
//最小长度，最大长度
var x = Math.random() * 80 + 150;
this.length = Math.ceil(x);
// x = Math.random()*10+30;
this.angle = 30; //流星倾斜角
x = Math.random()+0.5;
this.speed = Math.ceil(x); //流星的速度
var cos = Math.cos(this.angle*3.14/180);
var sin = Math.sin(this.angle*3.14/180) ;
this.width = this.length*cos ; //流星所占宽度
this.height = this.length*sin ;//流星所占高度
this.offset_x = this.speed*cos ;
this.offset_y = this.speed*sin;
}
this.getRandomColor = function (){
var a = Math.ceil(255-240* Math.random());
//中段颜色
this.color1 = "rgba("+a+","+a+","+a+",1)";
//结束颜色
this.color2 = "black";
}
this.countPos = function ()//
{
//往左下移动,x减少，y增加
this.x = this.x - this.offset_x;
this.y = this.y + this.offset_y;
}
this.getPos = function () //
{
//横坐标200--1200
this.x = Math.random() * window.innerWidth; //窗口高度
//纵坐标小于600
this.y = Math.random() * window.innerHeight; //窗口宽度
}
this.draw = function () //绘制一个流星的函数
{
context.save();
context.beginPath();
context.lineWidth = 1; //宽度
context.globalAlpha = this.alpha; //设置透明度
//创建横向渐变颜色,起点坐标至终点坐标
var line = context.createLinearGradient(this.x, this.y,
this.x + this.width,
this.y - this.height);
//分段设置颜色
line.addColorStop(0, "#ea80b0");
line.addColorStop(0.3, this.color1);
line.addColorStop(0.6, this.color2);
context.strokeStyle = line;
//起点
context.moveTo(this.x, this.y);
//终点
context.lineTo(this.x + this.width, this.y - this.height);
context.closePath();
context.stroke();
context.restore();
}
this.move = function(){
//清空流星像素
var x = this.x+this.width-this.offset_x;
var y = this.y-this.height;
context.clearRect(x-3,y-3,this.offset_x+5,this.offset_y+5);
// context.strokeStyle="red";
// context.strokeRect(x,y-1,this.offset_x+1,this.offset_y+1);
//重新计算位置，往左下移动
this.countPos();
//透明度增加
this.alpha -= 0.002;
//重绘
this.draw();
}
}
//绘制流星
function playRains(){
for (var n = 0; n < rainCount; n++){
var rain = rains[n];
rain.move();//移动
if(rain.y>window.innerHeight){//超出界限后重来
context.clearRect(rain.x,rain.y-rain.height,rain.width,rain.height);
rains[n] = new MeteorRain();
rains[n].init();
}
}
setTimeout("playRains()",2);
}
/*
* 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: 20, // 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'));
</script>
</body>
</html>
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