爱心流星雨背景_超好看.zip
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爱心流星雨背景_超好看.zip <!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><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() {