【酷炫烟花特效表白（Html5+CSS3+JS，带背景音乐哦！）】_记录、分享、总结、提升。_炫酷的表白js特效代码

irpas 02-07 790

快速阅读目录效果演示代码片段源码获取

效果演示

（同时也会有歌曲播放的哦！背景等都可以根据自己个人意愿来更改~）

这是第一种选择的部分效果展示：

这是第二种选择的部分效果展示：

代码片段

烟花.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://·plete) { 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 / 60) }; 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)) }; 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(30, 200); 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 = parseInt(getRandom(300, 400)); 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.save(); 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.fill(); ctx.restore() }, 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() } }; 源码获取

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