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集体博客首发：https://www.aiyc.top/2128.html
成果截图：
在线体验：
https://github.aiyc.top/YearTiger2022/
源码：
https://github.com/AndersonHJB/YearTiger2022
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <style> body { margin: 0; padding: 0; overflow: hidden; } .city { width: 100%; position: fixed; bottom: 0px; z-index: 100; } .city img { width: 100%; } </style> <title>2022虎年高兴</title></head><body onselectstart="return false"><canvas id='cas' style="background-color:rgba(0,5,24,1)">浏览器不反对canvas</canvas><div class="city"><img src="city.png" alt=""/></div><img src="moon.png" alt="" id="moon" style="visibility: hidden;"/><div style="display:none"> <div class="shape">2022新年快乐</div> <div class="shape">虎年大吉</div> <div class="shape">ヾ(^∀^)ﾉ</div></div><audio src="boom.mp3" preload="auto"></audio><audio src="boom.mp3" preload="auto"></audio><audio src="boom.mp3" preload="auto"></audio><audio src="boom.mp3" preload="auto"></audio><audio src="boom.mp3" preload="auto"></audio><audio src="boom.mp3" preload="auto"></audio><audio src="shotfire.mp3" preload="auto"></audio><audio src="shotfire.mp3" preload="auto"></audio><audio src="shotfire.mp3" preload="auto"></audio><script> var canvas = document.getElementById("cas"); var ocas = document.createElement("canvas"); var octx = ocas.getContext("2d"); var ctx = canvas.getContext("2d"); ocas.width = canvas.width = window.innerWidth; ocas.height = canvas.height = window.innerHeight; var bigbooms = []; window.onload = function() { initAnimate() } function initAnimate() { drawBg(); lastTime = new Date(); animate(); } var lastTime; function animate() { ctx.save(); ctx.globalCompositeOperation = 'destination-out'; ctx.globalAlpha = 0.1; ctx.fillRect(0, 0, canvas.width, canvas.height); ctx.restore(); var newTime = new Date(); if (newTime - lastTime > 200 + (window.innerHeight - 767) / 2) { var random = Math.random() * 100 > 2 ? true : false; var x = getRandom(canvas.width / 5, canvas.width * 4 / 5); var y = getRandom(50, 200); if (random) { var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF", {x: x, y: y}); bigbooms.push(bigboom) } else { var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF", { x: canvas.width / 2, y: 200 }, document.querySelectorAll(".shape")[parseInt(getRandom(0, document.querySelectorAll(".shape").length))]); bigbooms.push(bigboom) } lastTime = newTime; } stars.foreach(function() { this.paint(); }) drawMoon(); bigbooms.foreach(function(index) { var that = this; if (!this.dead) { this._move(); this._drawLight(); } else { this.booms.foreach(function(index) { if (!this.dead) { this.moveTo(index); } else if (index === that.booms.length - 1) { bigbooms.splice(bigbooms.indexOf(that), 1); } }) } }); raf(animate); } function drawMoon() { var moon = document.getElementById("moon"); var centerX = canvas.width - 200, centerY = 100, width = 80; if (moon.complete) { ctx.drawImage(moon, centerX, centerY, width, width) } else { moon.onload = function() { ctx.drawImage(moon, centerX, centerY, width, width) } } var index = 0; for (var i = 0; i < 10; i++) { ctx.save(); ctx.beginPath(); ctx.arc(centerX + width / 2, centerY + width / 2, width / 2 + index, 0, 2 * Math.PI); ctx.fillStyle = "rgba(240,219,120,0.005)"; index += 2; ctx.fill(); ctx.restore(); } } Array.prototype.foreach = function(callback) { for (var i = 0; i < this.length; i++) { if (this[i] !== null) callback.apply(this[i], [i]) } } var raf = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1000 / 10); }; canvas.onclick = function() { var x = event.clientX; var y = event.clientY; var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF", {x: x, y: y}); bigbooms.push(bigboom) } var Boom = function(x, r, c, boomArea, shape) { this.booms = []; this.x = x; this.y = (canvas.height + r); this.r = r; this.c = c; this.shape = shape || false; this.boomArea = boomArea; this.theta = 0; this.dead = false; this.ba = parseInt(getRandom(80, 200)); var audio = document.getElementsByTagName("audio"); for (var i = 0; i < audio.length; i++) { if (audio[i].src.indexOf("shotfire") >= 0 && (audio[i].paused || audio[i].ended)) { audio[i].play(); break; } } } Boom.prototype = { _paint: function() { ctx.save(); ctx.beginPath(); ctx.arc(this.x, this.y, this.r, 0, 2 * Math.PI); ctx.fillStyle = this.c; ctx.fill(); ctx.restore(); }, _move: function() { var dx = this.boomArea.x - this.x, dy = this.boomArea.y - this.y; this.x = this.x + dx * 0.01; this.y = this.y + dy * 0.01; if (Math.abs(dx) <= this.ba && Math.abs(dy) <= this.ba) { if (this.shape) { this._shapBoom(); } else this._boom(); this.dead = true; } else { this._paint(); } }, _drawLight: function() { ctx.save(); ctx.fillStyle = "rgba(255,228,150,0.3)"; ctx.beginPath(); ctx.arc(this.x, this.y, this.r + 3 * Math.random() + 1, 0, 2 * Math.PI); ctx.fill(); ctx.restore(); }, _boom: function() { var fragNum = getRandom(100, 300); var style = getRandom(0, 10) >= 5 ? 1 : 2; var color; if (style === 1) { color = { a: parseInt(getRandom(128, 255)), b: parseInt(getRandom(128, 255)), c: parseInt(getRandom(128, 255)) } } var fanwei = fragNum; var audio = document.getElementsByTagName("audio"); for (var i = 0; i < audio.length; i++) { if (audio[i].src.indexOf("boom") >= 0 && (audio[i].paused || audio[i].ended)) { audio[i].play(); break; } } for (var i = 0; i < fragNum; i++) { if (style === 2) { color = { a: parseInt(getRandom(128, 255)), b: parseInt(getRandom(128, 255)), c: parseInt(getRandom(128, 255)) } } var a = getRandom(-Math.PI, Math.PI); var x = getRandom(0, fanwei) * Math.cos(a) + this.x; var y = getRandom(0, fanwei) * Math.sin(a) + this.y; var radius = getRandom(0, 2) var frag = new Frag(this.x, this.y, radius, color, x, y); this.booms.push(frag); } }, _shapBoom: function() { var that = this; putValue(ocas, octx, this.shape, 5, function(dots) { var dx = canvas.width / 2 - that.x; var dy = canvas.height / 2 - that.y; for (var i = 0; i < dots.length; i++) { color = {a: dots[i].a, b: dots[i].b, c: dots[i].c} var x = dots[i].x; var y = dots[i].y; var radius = 1; var frag = new Frag(that.x, that.y, radius, color, x - dx, y - dy); that.booms.push(frag); } }) } } function putValue(canvas, context, ele, dr, callback) { context.clearRect(0, 0, canvas.width, canvas.height); var img = new Image(); if (ele.innerHTML.indexOf("img") >= 0) { img.src = ele.getElementsByTagName("img")[0].src; imgload(img, function() { context.drawImage(img, canvas.width / 2 - img.width / 2, canvas.height / 2 - img.width / 2); dots = getimgData(canvas, context, dr); callback(dots); }) } else { var text = ele.innerHTML; context.save(); var fontSize = 200; context.font = fontSize + "px 宋体 bold"; context.textAlign = "center"; context.textBaseline = "middle"; context.fillStyle = "rgba(" + parseInt(getRandom(128, 255)) + "," + parseInt(getRandom(128, 255)) + "," + parseInt(getRandom(128, 255)) + " , 1)"; context.fillText(text, canvas.width / 2, canvas.height / 2); context.restore(); dots = getimgData(canvas, context, dr); callback(dots); } } function imgload(img, callback) { if (img.complete) { callback.call(img); } else { img.onload = function() { callback.call(this); } } } function getimgData(canvas, context, dr) { var imgData = context.getImageData(0, 0, canvas.width, canvas.height); context.clearRect(0, 0, canvas.width, canvas.height); var dots = []; for (var x = 0; x < imgData.width; x += dr) { for (var y = 0; y < imgData.height; y += dr) { var i = (y * imgData.width + x) * 4; if (imgData.data[i + 3] > 128) { var dot = {x: x, y: y, a: imgData.data[i], b: imgData.data[i + 1], c: imgData.data[i + 2]}; dots.push(dot); } } } return dots; } function getRandom(a, b) { return Math.random() * (b - a) + a; } var maxRadius = 1, stars = []; function drawBg() { for (var i = 0; i < 100; i++) { var r = Math.random() * maxRadius; var x = Math.random() * canvas.width; var y = Math.random() * 2 * canvas.height - canvas.height; var star = new Star(x, y, r); stars.push(star); star.paint() } } var Star = function(x, y, r) { this.x = x; this.y = y; this.r = r; } Star.prototype = { paint: function() { ctx.save(); ctx.beginPath(); ctx.arc(this.x, this.y, this.r, 0, 2 * Math.PI); ctx.fillStyle = "rgba(255,255,255," + this.r + ")"; ctx.fill(); ctx.restore(); } } var focallength = 250; var Frag = function(centerX, centerY, radius, color, tx, ty) { this.tx = tx; this.ty = ty; this.x = centerX; this.y = centerY; this.dead = false; this.centerX = centerX; this.centerY = centerY; this.radius = radius; this.color = color; } Frag.prototype = { paint: function() { // ctx.beginPath(); // ctx.arc(this.x , this.y , this.radius , 0 , 2*Math.PI); ctx.fillStyle = "rgba(" + this.color.a + "," + this.color.b + "," + this.color.c + ",1)"; ctx.fillRect(this.x - this.radius, this.y - this.radius, this.radius * 2, this.radius * 2) }, moveTo: function(index) { this.ty = this.ty + 0.3; var dx = this.tx - this.x, dy = this.ty - this.y; this.x = Math.abs(dx) < 0.1 ? this.tx : (this.x + dx * 0.1); this.y = Math.abs(dy) < 0.1 ? this.ty : (this.y + dy * 0.1); if (dx === 0 && Math.abs(dy) <= 80) { this.dead = true; } this.paint(); } } </script></body></html>AI悦创·推出辅导班啦，包含「Python 语言辅导班、C++辅导班、算法/数据结构辅导班、少儿编程、pygame 游戏开发」，全部都是一对一教学：一对一辅导 + 一对一答疑 + 安排作业 + 我的项目实际等。QQ、微信在线，随时响应！V：Jiabcdefh，公众号：AI悦创