每到 新年的时候捏，就要放烟花啦！但是放烟花太多会危害环境，所以互联网时代的电子烟花平替就代替实体烟花帮我们除旧迎新啦！今天就po一个找到滴猿如意烟花网页代码，开源滴，然后改了一些背景参数，记录一下，新年时给大家送祝福(●'◡'●)
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>烟花代码</title> <style> html, body { height: 100%; margin: 0; padding: 0; } ul, li { text-indent: 0; text-decoration: none; margin: 0; padding: 0; } img { border: 0; } body { background-color: #000; } canvas { cursor: crosshair; display: block; left: 0; position: absolute; top: 0; z-index: 20; } </style> </head> <body> <script type="text/javascript" src="https://cdn-static-devbit.csdn.net/devbit-static/js/jquery-3.3.1.min.js" ></script> <script type="text/javascript"> $(function () { var Fireworks = function () { var self = this; var rand = function (rMi, rMa) { return ~~(Math.random() * (rMa - rMi + 1) + rMi); }; var hitTest = function (x1, y1, w1, h1, x2, y2, w2, h2) { return !( x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1 ); }; window.requestAnimFrame = (function () { return ( window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (a) { window.setTimeout(a, 1e3 / 60); } ); })(); self.init = function () { self.canvas = document.createElement("canvas"); self.canvas.width = self.cw = $(window).innerWidth(); self.canvas.height = self.ch = $(window).innerHeight(); self.particles = []; self.partCount = 150; self.fireworks = []; self.mx = self.cw / 2; self.my = self.ch / 2; self.currentHue = 30; self.partSpeed = 5; self.partSpeedVariance = 10; self.partWind = 50; self.partFriction = 5; self.partGravity = 1; self.hueMin = 0; self.hueMax = 360; self.fworkSpeed = 4; self.fworkAccel = 10; self.hueVariance = 30; self.flickerDensity = 25; self.showShockwave = true; self.showTarget = false; self.clearAlpha = 25; $(document.body).append(self.canvas); self.ctx = self.canvas.getContext("2d"); self.ctx.lineCap = "round"; self.ctx.lineJoin = "round"; self.lineWidth = 1; self.bindEvents(); self.canvasLoop(); self.canvas.onselectstart = function () { return false; }; }; self.createParticles = function (x, y, hue) { var countdown = self.partCount; while (countdown--) { var newParticle = { x: x, y: y, coordLast: [ { x: x, y: y }, { x: x, y: y }, { x: x, y: y } ], angle: rand(0, 360), speed: rand( self.partSpeed - self.partSpeedVariance <= 0 ? 1 : self.partSpeed - self.partSpeedVariance, self.partSpeed + self.partSpeedVariance ), friction: 1 - self.partFriction / 100, gravity: self.partGravity / 2, hue: rand(hue - self.hueVariance, hue + self.hueVariance), brightness: rand(50, 80), alpha: rand(40, 100) / 100, decay: rand(10, 50) / 1000, wind: (rand(0, self.partWind) - self.partWind / 2) / 25, lineWidth: self.lineWidth }; self.particles.push(newParticle); } }; self.updateParticles = function () { var i = self.particles.length; while (i--) { var p = self.particles[i]; var radians = (p.angle * Math.PI) / 180; var vx = Math.cos(radians) * p.speed; var vy = Math.sin(radians) * p.speed; p.speed *= p.friction; p.coordLast[2].x = p.coordLast[1].x; p.coordLast[2].y = p.coordLast[1].y; p.coordLast[1].x = p.coordLast[0].x; p.coordLast[1].y = p.coordLast[0].y; p.coordLast[0].x = p.x; p.coordLast[0].y = p.y; p.x += vx; p.y += vy; p.y += p.gravity; p.angle += p.wind; p.alpha -= p.decay; if ( !hitTest( 0, 0, self.cw, self.ch, p.x - p.radius, p.y - p.radius, p.radius * 2, p.radius * 2 ) || p.alpha < 0.05 ) { self.particles.splice(i, 1); } } }; self.drawParticles = function () { var i = self.particles.length; while (i--) { var p = self.particles[i]; var coordRand = rand(1, 3) - 1; self.ctx.beginPath(); self.ctx.moveTo( Math.round(p.coordLast[coordRand].x), Math.round(p.coordLast[coordRand].y) ); self.ctx.lineTo(Math.round(p.x), Math.round(p.y)); self.ctx.closePath(); self.ctx.strokeStyle = "hsla(" + p.hue + ", 100%, " + p.brightness + "%, " + p.alpha + ")"; self.ctx.stroke(); if (self.flickerDensity > 0) { var inverseDensity = 50 - self.flickerDensity; if (rand(0, inverseDensity) === inverseDensity) { self.ctx.beginPath(); self.ctx.arc( Math.round(p.x), Math.round(p.y), rand(p.lineWidth, p.lineWidth + 3) / 2, 0, Math.PI * 2, false ); self.ctx.closePath(); var randAlpha = rand(50, 100) / 100; self.ctx.fillStyle = "hsla(" + p.hue + ", 100%, " + p.brightness + "%, " + randAlpha + ")"; self.ctx.fill(); } } } }; self.createFireworks = function (startX, startY, targetX, targetY) { var newFirework = { x: startX, y: startY, startX: startX, startY: startY, hitX: false, hitY: false, coordLast: [ { x: startX, y: startY }, { x: startX, y: startY }, { x: startX, y: startY } ], targetX: targetX, targetY: targetY, speed: self.fworkSpeed, angle: Math.atan2(targetY - startY, targetX - startX), shockwaveAngle: Math.atan2(targetY - startY, targetX - startX) + 90 * (Math.PI / 180), acceleration: self.fworkAccel / 100, hue: self.currentHue, brightness: rand(50, 80), alpha: rand(50, 100) / 100, lineWidth: self.lineWidth }; self.fireworks.push(newFirework); }; self.updateFireworks = function () { var i = self.fireworks.length; while (i--) { var f = self.fireworks[i]; self.ctx.lineWidth = f.lineWidth; (vx = Math.cos(f.angle) * f.speed), (vy = Math.sin(f.angle) * f.speed); f.speed *= 1 + f.acceleration; f.coordLast[2].x = f.coordLast[1].x; f.coordLast[2].y = f.coordLast[1].y; f.coordLast[1].x = f.coordLast[0].x; f.coordLast[1].y = f.coordLast[0].y; f.coordLast[0].x = f.x; f.coordLast[0].y = f.y; if (f.startX >= f.targetX) { if (f.x + vx <= f.targetX) { f.x = f.targetX; f.hitX = true; } else { f.x += vx; } } else { if (f.x + vx >= f.targetX) { f.x = f.targetX; f.hitX = true; } else { f.x += vx; } } if (f.startY >= f.targetY) { if (f.y + vy <= f.targetY) { f.y = f.targetY; f.hitY = true; } else { f.y += vy; } } else { if (f.y + vy >= f.targetY) { f.y = f.targetY; f.hitY = true; } else { f.y += vy; } } if (f.hitX && f.hitY) { self.createParticles(f.targetX, f.targetY, f.hue); self.fireworks.splice(i, 1); } } }; self.drawFireworks = function () { var i = self.fireworks.length; self.ctx.globalCompositeOperation = "lighter"; while (i--) { var f = self.fireworks[i]; self.ctx.lineWidth = f.lineWidth; var coordRand = rand(1, 3) - 1; self.ctx.beginPath(); self.ctx.moveTo( Math.round(f.coordLast[coordRand].x), Math.round(f.coordLast[coordRand].y) ); self.ctx.lineTo(Math.round(f.x), Math.round(f.y)); self.ctx.closePath(); self.ctx.strokeStyle = "hsla(" + f.hue + ", 100%, " + f.brightness + "%, " + f.alpha + ")"; self.ctx.stroke(); if (self.showTarget) { self.ctx.save(); self.ctx.beginPath(); self.ctx.arc( Math.round(f.targetX), Math.round(f.targetY), rand(1, 8), 0, Math.PI * 2, false ); self.ctx.closePath(); self.ctx.lineWidth = 1; self.ctx.stroke(); self.ctx.restore(); } if (self.showShockwave) { self.ctx.save(); self.ctx.translate(Math.round(f.x), Math.round(f.y)); self.ctx.rotate(f.shockwaveAngle); self.ctx.beginPath(); self.ctx.arc(0, 0, 1 * (f.speed / 5), 0, Math.PI, true); self.ctx.strokeStyle = "hsla(" + f.hue + ", 100%, " + f.brightness + "%, " + rand(25, 60) / 100 + ")"; self.ctx.lineWidth = f.lineWidth; self.ctx.stroke(); self.ctx.restore(); } } }; self.bindEvents = function () { $(window).on("resize", function () { clearTimeout(self.timeout); self.timeout = setTimeout(function () { self.canvas.width = self.cw = $(window).innerWidth(); self.canvas.height = self.ch = $(window).innerHeight(); self.ctx.lineCap = "round"; self.ctx.lineJoin = "round"; }, 100); }); $(self.canvas).on("mousedown", function (e) { self.mx = e.pageX - self.canvas.offsetLeft; self.my = e.pageY - self.canvas.offsetTop; self.currentHue = rand(self.hueMin, self.hueMax); self.createFireworks(self.cw / 2, self.ch, self.mx, self.my); $(self.canvas).on("mousemove.fireworks", function (e) { self.mx = e.pageX - self.canvas.offsetLeft; self.my = e.pageY - self.canvas.offsetTop; self.currentHue = rand(self.hueMin, self.hueMax); self.createFireworks(self.cw / 2, self.ch, self.mx, self.my); }); }); $(self.canvas).on("mouseup", function (e) { $(self.canvas).off("mousemove.fireworks"); }); }; self.clear = function () { self.particles = []; self.fireworks = []; self.ctx.clearRect(0, 0, self.cw, self.ch); }; self.canvasLoop = function () { requestAnimFrame(self.canvasLoop, self.canvas); self.ctx.globalCompositeOperation = "destination-out"; self.ctx.fillStyle = "rgba(0,0,0," + self.clearAlpha / 100 + ")"; self.ctx.fillRect(0, 0, self.cw, self.ch); self.updateFireworks(); self.updateParticles(); self.drawFireworks(); self.drawParticles(); }; self.init(); }; var fworks = new Fireworks(); }); </script> </body> </html>
本文转载自: https://blog.csdn.net/ZERO_QwQ_/article/details/128594439
版权归原作者 ZERO_. 所有， 如有侵权，请联系我们删除。
版权归原作者 ZERO_. 所有， 如有侵权，请联系我们删除。