一： 简单Html先来一个简单的形象实现烟花（绝对绚丽）
先看效果
源码
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>html5 canvas除夕烟花</title><base target="_blank" /> <link rel="stylesheet" type="text/css" href="http://hovertree.com/texiao/html5/43/css/normalize.css" /> <link rel="stylesheet" type="text/css" href="http://hovertree.com/texiao/html5/43/css/hovertree.css"> </head> <body> <div class="hovertree"></div> <script type="text/javascript" src="http://down.hovertree.com/jquery/jquery-1.11.0.min.js"></script> <script type="text/javascript" src="http://hovertree.com/texiao/html5/43/js/jquery.fireworks.js"></script> <script type="text/javascript"> $('.hovertree').fireworks({ sound: true, // sound effect opacity: 0.9, width: '100%', height: '100%' }); </script> <div style="width:340px;position:fixed;z-index:99;"><a href="http://hovertree.com/"></a> <a href="http://hovertree.com/h/bjag/me34x8fk.htm"></a></div> </body> </html>
二：HTML+Canvas(内含js)
我们先看实现效果
源码如下，一共三百多行
<!doctype html> <html> <head> <meta charset="utf-8"> <title>除夕 html,body{ margin:0px; width:100%; height:100%; overflow:hidden; background:#000; } </style> </head> <body> <canvas id="canvas" style="position:absolute;width:100%;height:100%;z-index:8888"></canvas> <canvas style="position:absolute;width:100%;height:100%;z-index:9999" class="canvas" ></canvas> <div class="overlay"> <div class="tabs"> <div class="tabs-labels"><span class="tabs-label">Commands</span><span class="tabs-label">Info</span><span class="tabs-label">Share</span></div> <div class="tabs-panels"> <ul class="tabs-panel commands"> </ul> </div> </div> </div> <script> function initVars(){ pi=Math.PI; ctx=canvas.getContext("2d"); canvas.width=canvas.clientWidth; canvas.height=canvas.clientHeight; cx=canvas.width/2; cy=canvas.height/2; playerZ=-25; playerX=playerY=playerVX=playerVY=playerVZ=pitch=yaw=pitchV=yawV=0; scale=600; seedTimer=0;seedInterval=5,seedLife=100;gravity=.02; seeds=new Array(); sparkPics=new Array(); s="https://cantelope.org/NYE/"; for(i=1;i<=10;++i){ sparkPic=new Image(); sparkPic.src=s+"spark"+i+".png"; sparkPics.push(sparkPic); } sparks=new Array(); pow1=new Audio(s+"pow1.ogg"); pow2=new Audio(s+"pow2.ogg"); pow3=new Audio(s+"pow3.ogg"); pow4=new Audio(s+"pow4.ogg"); frames = 0; } function rasterizePoint(x,y,z){ var p,d; x-=playerX; y-=playerY; z-=playerZ; p=Math.atan2(x,z); d=Math.sqrt(x*x+z*z); x=Math.sin(p-yaw)*d; z=Math.cos(p-yaw)*d; p=Math.atan2(y,z); d=Math.sqrt(y*y+z*z); y=Math.sin(p-pitch)*d; z=Math.cos(p-pitch)*d; var rx1=-1000,ry1=1,rx2=1000,ry2=1,rx3=0,ry3=0,rx4=x,ry4=z,uc=(ry4-ry3)*(rx2-rx1)-(rx4-rx3)*(ry2-ry1); if(!uc) return {x:0,y:0,d:-1}; var ua=((rx4-rx3)*(ry1-ry3)-(ry4-ry3)*(rx1-rx3))/uc; var ub=((rx2-rx1)*(ry1-ry3)-(ry2-ry1)*(rx1-rx3))/uc; if(!z)z=.000000001; if(ua>0&&ua<1&&ub>0&&ub<1){ return { x:cx+(rx1+ua*(rx2-rx1))*scale, y:cy+y/z*scale, d:Math.sqrt(x*x+y*y+z*z) }; }else{ return { x:cx+(rx1+ua*(rx2-rx1))*scale, y:cy+y/z*scale, d:-1 }; } } function spawnSeed(){ seed=new Object(); seed.x=-50+Math.random()*100; seed.y=25; seed.z=-50+Math.random()*100; seed.vx=.1-Math.random()*.2; seed.vy=-1.5;//*(1+Math.random()/2); seed.vz=.1-Math.random()*.2; seed.born=frames; seeds.push(seed); } function splode(x,y,z){ t=5+parseInt(Math.random()*150); sparkV=1+Math.random()*2.5; type=parseInt(Math.random()*3); switch(type){ case 0: pic1=parseInt(Math.random()*10); break; case 1: pic1=parseInt(Math.random()*10); do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1); break; case 2: pic1=parseInt(Math.random()*10); do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1); do{ pic3=parseInt(Math.random()*10); }while(pic3==pic1 || pic3==pic2); break; } for(m=1;m<t;++m){ spark=new Object(); spark.x=x; spark.y=y; spark.z=z; p1=pi*2*Math.random(); p2=pi*Math.random(); v=sparkV*(1+Math.random()/6) spark.vx=Math.sin(p1)*Math.sin(p2)*v; spark.vz=Math.cos(p1)*Math.sin(p2)*v; spark.vy=Math.cos(p2)*v; switch(type){ case 0: spark.img=sparkPics[pic1]; break; case 1: spark.img=sparkPics[parseInt(Math.random()*2)?pic1:pic2]; break; case 2: switch(parseInt(Math.random()*3)){ case 0: spark.img=sparkPics[pic1]; break; case 1: spark.img=sparkPics[pic2]; break; case 2: spark.img=sparkPics[pic3]; break; } break; } spark.radius=25+Math.random()*50; spark.alpha=1; spark.trail=new Array(); sparks.push(spark); } switch(parseInt(Math.random()*4)){ case 0: pow=new Audio(s+"pow1.ogg"); break; case 1: pow=new Audio(s+"pow2.ogg"); break; case 2: pow=new Audio(s+"pow3.ogg"); break; case 3: pow=new Audio(s+"pow4.ogg"); break; } d=Math.sqrt((x-playerX)*(x-playerX)+(y-playerY)*(y-playerY)+(z-playerZ)*(z-playerZ)); pow.volume=1.5/(1+d/10); pow.play(); } function doLogic(){ if(seedTimer<frames){ seedTimer=frames+seedInterval*Math.random()*10; spawnSeed(); } for(i=0;i<seeds.length;++i){ seeds[i].vy+=gravity; seeds[i].x+=seeds[i].vx; seeds[i].y+=seeds[i].vy; seeds[i].z+=seeds[i].vz; if(frames-seeds[i].born>seedLife){ splode(seeds[i].x,seeds[i].y,seeds[i].z); seeds.splice(i,1); } } for(i=0;i<sparks.length;++i){ if(sparks[i].alpha>0 && sparks[i].radius>5){ sparks[i].alpha-=.01; sparks[i].radius/=1.02; sparks[i].vy+=gravity; point=new Object(); point.x=sparks[i].x; point.y=sparks[i].y; point.z=sparks[i].z; if(sparks[i].trail.length){ x=sparks[i].trail[sparks[i].trail.length-1].x; y=sparks[i].trail[sparks[i].trail.length-1].y; z=sparks[i].trail[sparks[i].trail.length-1].z; d=((point.x-x)*(point.x-x)+(point.y-y)*(point.y-y)+(point.z-z)*(point.z-z)); if(d>9){ sparks[i].trail.push(point); } }else{ sparks[i].trail.push(point); } if(sparks[i].trail.length>5)sparks[i].trail.splice(0,1); sparks[i].x+=sparks[i].vx; sparks[i].y+=sparks[i].vy; sparks[i].z+=sparks[i].vz; sparks[i].vx/=1.075; sparks[i].vy/=1.075; sparks[i].vz/=1.075; }else{ sparks.splice(i,1); } } p=Math.atan2(playerX,playerZ); d=Math.sqrt(playerX*playerX+playerZ*playerZ); d+=Math.sin(frames/80)/1.25; t=Math.sin(frames/200)/40; playerX=Math.sin(p+t)*d; playerZ=Math.cos(p+t)*d; yaw=pi+p+t; } function rgb(col){ var r = parseInt((.5+Math.sin(col)*.5)*16); var g = parseInt((.5+Math.cos(col)*.5)*16); var b = parseInt((.5-Math.sin(col)*.5)*16); return "#"+r.toString(16)+g.toString(16)+b.toString(16); } function draw(){ ctx.clearRect(0,0,cx*2,cy*2); ctx.fillStyle="#ff8"; for(i=-100;i<100;i+=3){ for(j=-100;j<100;j+=4){ x=i;z=j;y=25; point=rasterizePoint(x,y,z); if(point.d!=-1){ size=250/(1+point.d); d = Math.sqrt(x * x + z * z); a = 0.75 - Math.pow(d / 100, 6) * 0.75; if(a>0){ ctx.globalAlpha = a; ctx.fillRect(point.x-size/2,point.y-size/2,size,size); } } } } ctx.globalAlpha=1; for(i=0;i<seeds.length;++i){ point=rasterizePoint(seeds[i].x,seeds[i].y,seeds[i].z); if(point.d!=-1){ size=200/(1+point.d); ctx.fillRect(point.x-size/2,point.y-size/2,size,size); } } point1=new Object(); for(i=0;i<sparks.length;++i){ point=rasterizePoint(sparks[i].x,sparks[i].y,sparks[i].z); if(point.d!=-1){ size=sparks[i].radius*200/(1+point.d); if(sparks[i].alpha<0)sparks[i].alpha=0; if(sparks[i].trail.length){ point1.x=point.x; point1.y=point.y; switch(sparks[i].img){ case sparkPics[0]:ctx.strokeStyle="#f84";break; case sparkPics[1]:ctx.strokeStyle="#84f";break; case sparkPics[2]:ctx.strokeStyle="#8ff";break; case sparkPics[3]:ctx.strokeStyle="#fff";break; case sparkPics[4]:ctx.strokeStyle="#4f8";break; case sparkPics[5]:ctx.strokeStyle="#f44";break; case sparkPics[6]:ctx.strokeStyle="#f84";break; case sparkPics[7]:ctx.strokeStyle="#84f";break; case sparkPics[8]:ctx.strokeStyle="#fff";break; case sparkPics[9]:ctx.strokeStyle="#44f";break; } for(j=sparks[i].trail.length-1;j>=0;--j){ point2=rasterizePoint(sparks[i].trail[j].x,sparks[i].trail[j].y,sparks[i].trail[j].z); if(point2.d!=-1){ ctx.globalAlpha=j/sparks[i].trail.length*sparks[i].alpha/2; ctx.beginPath(); ctx.moveTo(point1.x,point1.y); ctx.lineWidth=1+sparks[i].radius*10/(sparks[i].trail.length-j)/(1+point2.d); ctx.lineTo(point2.x,point2.y); ctx.stroke(); point1.x=point2.x; point1.y=point2.y; } } } ctx.globalAlpha=sparks[i].alpha; ctx.drawImage(sparks[i].img,point.x-size/2,point.y-size/2,size,size); } } } function frame(){ if(frames>100000){ seedTimer=0; frames=0; } frames++; draw(); doLogic(); requestAnimationFrame(frame); } window.addEventListener("resize",()=>{ canvas.width=canvas.clientWidth; canvas.height=canvas.clientHeight; cx=canvas.width/2; cy=canvas.height/2; }); initVars(); frame(); </script> <script src="js/index.js"></script> </body> </html>
下面是引用的js源码，js渲染需要比较多的代码。
var S = { init: function () { var action = window.location.href, i = action.indexOf('?a='); S.Drawing.init('.canvas'); document.body.classList.add('body--ready'); if (i !== -1) { S.UI.simulate(decodeURI(action).substring(i + 3)); } else { S.UI.simulate('除夕节日快乐'); } S.Drawing.loop(function () { S.Shape.render(); }); } }; S.Drawing = (function () { var canvas, context, renderFn requestFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1000 / 60); }; return { init: function (el) { canvas = document.querySelector(el); context = canvas.getContext('2d'); this.adjustCanvas(); window.addEventListener('resize', function (e) { S.Drawing.adjustCanvas(); }); }, loop: function (fn) { renderFn = !renderFn ? fn : renderFn; this.clearFrame(); renderFn(); requestFrame.call(window, this.loop.bind(this)); }, adjustCanvas: function () { canvas.width = window.innerWidth; canvas.height = window.innerHeight; }, clearFrame: function () { context.clearRect(0, 0, canvas.width, canvas.height); }, getArea: function () { return { w: canvas.width, h: canvas.height }; }, drawCircle: function (p, c) { context.fillStyle = c.render(); context.beginPath(); context.arc(p.x, p.y, p.z, 0, 2 * Math.PI, true); context.closePath(); context.fill(); } } }()); S.UI = (function () { var canvas = document.querySelector('.canvas'), interval, isTouch = false, //('ontouchstart' in window || navigator.msMaxTouchPoints), currentAction, resizeTimer, time, maxShapeSize = 30, firstAction = true, sequence = [], cmd = '#'; function formatTime(date) { var h = date.getHours(), m = date.getMinutes(), m = m < 10 ? '0' + m : m; return h + ':' + m; } function getValue(value) { return value && value.split(' ')[1]; } function getAction(value) { value = value && value.split(' ')[0]; return value && value[0] === cmd && value.substring(1); } function timedAction(fn, delay, max, reverse) { clearInterval(interval); currentAction = reverse ? max : 1; fn(currentAction); if (!max || (!reverse && currentAction < max) || (reverse && currentAction > 0)) { interval = setInterval(function () { currentAction = reverse ? currentAction - 1 : currentAction + 1; fn(currentAction); if ((!reverse && max && currentAction === max) || (reverse && currentAction === 0)) { clearInterval(interval); } }, delay); } } function reset(destroy) { clearInterval(interval); sequence = []; time = null; destroy && S.Shape.switchShape(S.ShapeBuilder.letter('')); } function performAction(value) { var action, value, current; // overlay.classList.remove('overlay--visible'); sequence = typeof(value) === 'object' ? value : sequence.concat(value.split('|')); // input.value = ''; // checkInputWidth(); timedAction(function (index) { current = sequence.shift(); action = getAction(current); value = getValue(current); switch (action) { case 'countdown': value = parseInt(value) || 10; value = value > 0 ? value : 10; timedAction(function (index) { if (index === 0) { if (sequence.length === 0) { S.Shape.switchShape(S.ShapeBuilder.letter('')); } else { performAction(sequence); } } else { S.Shape.switchShape(S.ShapeBuilder.letter(index), true); } }, 1000, value, true); break; case 'rectangle': value = value && value.split('x'); value = (value && value.length === 2) ? value : [maxShapeSize, maxShapeSize / 2]; S.Shape.switchShape(S.ShapeBuilder.rectangle(Math.min(maxShapeSize, parseInt(value[0])), Math.min(maxShapeSize, parseInt(value[1])))); break; case 'circle': value = parseInt(value) || maxShapeSize; value = Math.min(value, maxShapeSize); S.Shape.switchShape(S.ShapeBuilder.circle(value)); break; case 'time': var t = formatTime(new Date()); if (sequence.length > 0) { S.Shape.switchShape(S.ShapeBuilder.letter(t)); } else { timedAction(function () { t = formatTime(new Date()); if (t !== time) { time = t; S.Shape.switchShape(S.ShapeBuilder.letter(time)); } }, 1000); } break; default: S.Shape.switchShape(S.ShapeBuilder.letter(current[0] === cmd ? 'What?' : current)); } }, 2000, sequence.length); } function checkInputWidth(e) { if (input.value.length > 18) { ui.classList.add('ui--wide'); } else { ui.classList.remove('ui--wide'); } if (firstAction && input.value.length > 0) { ui.classList.add('ui--enter'); } else { ui.classList.remove('ui--enter'); } } function bindEvents() { document.body.addEventListener('keydown', function (e) { input.focus(); if (e.keyCode === 13) { firstAction = false; reset(); performAction(input.value); } }); canvas.addEventListener('click', function (e) { overlay.classList.remove('overlay--visible'); }); } function init() { bindEvents(); // input.focus(); isTouch && document.body.classList.add('touch'); } // Init init(); return { simulate: function (action) { performAction(action); } } }()); S.UI.Tabs = (function () { var tabs = document.querySelector('.tabs'), labels = document.querySelector('.tabs-labels'), triggers = document.querySelectorAll('.tabs-label'), panels = document.querySelectorAll('.tabs-panel'); function activate(i) { triggers[i].classList.add('tabs-label--active'); panels[i].classList.add('tabs-panel--active'); } function bindEvents() { labels.addEventListener('click', function (e) { var el = e.target, index; if (el.classList.contains('tabs-label')) { for (var t = 0; t < triggers.length; t++) { triggers[t].classList.remove('tabs-label--active'); panels[t].classList.remove('tabs-panel--active'); if (el === triggers[t]) { index = t; } } activate(index); } }); } function init() { activate(0); bindEvents(); } // Init init(); }()); S.Point = function (args) { this.x = args.x; this.y = args.y; this.z = args.z; this.a = args.a; this.h = args.h; }; S.Color = function (r, g, b, a) { this.r = r; this.g = g; this.b = b; this.a = a; }; S.Color.prototype = { render: function () { return 'rgba(' + this.r + ',' + + this.g + ',' + this.b + ',' + this.a + ')'; } }; S.Dot = function (x, y) { this.p = new S.Point({ x: x, y: y, z: 5, a: 1, h: 0 }); this.e = 0.07; this.s = true; this.c = new S.Color(255, 255, 255, this.p.a); this.t = this.clone(); this.q = []; }; S.Dot.prototype = { clone: function () { return new S.Point({ x: this.x, y: this.y, z: this.z, a: this.a, h: this.h }); }, _draw: function () { this.c.a = this.p.a; S.Drawing.drawCircle(this.p, this.c); }, _moveTowards: function (n) { var details = this.distanceTo(n, true), dx = details[0], dy = details[1], d = details[2], e = this.e * d; if (this.p.h === -1) { this.p.x = n.x; this.p.y = n.y; return true; } if (d > 1) { this.p.x -= ((dx / d) * e); this.p.y -= ((dy / d) * e); } else { if (this.p.h > 0) { this.p.h--; } else { return true; } } return false; }, _update: function () { if (this._moveTowards(this.t)) { var p = this.q.shift(); if (p) { this.t.x = p.x || this.p.x; this.t.y = p.y || this.p.y; this.t.z = p.z || this.p.z; this.t.a = p.a || this.p.a; this.p.h = p.h || 0; } else { if (this.s) { this.p.x -= Math.sin(Math.random() * 3.142); this.p.y -= Math.sin(Math.random() * 3.142); } else { this.move(new S.Point({ x: this.p.x + (Math.random() * 50) - 25, y: this.p.y + (Math.random() * 50) - 25, })); } } } d = this.p.a - this.t.a; this.p.a = Math.max(0.1, this.p.a - (d * 0.05)); d = this.p.z - this.t.z; this.p.z = Math.max(1, this.p.z - (d * 0.05)); }, distanceTo: function (n, details) { var dx = this.p.x - n.x, dy = this.p.y - n.y, d = Math.sqrt(dx * dx + dy * dy); return details ? [dx, dy, d] : d; }, move: function (p, avoidStatic) { if (!avoidStatic || (avoidStatic && this.distanceTo(p) > 1)) { this.q.push(p); } }, render: function () { this._update(); this._draw(); } } S.ShapeBuilder = (function () { var gap = 13, shapeCanvas = document.createElement('canvas'), shapeContext = shapeCanvas.getContext('2d'), fontSize = 500, fontFamily = 'Avenir, Helvetica Neue, Helvetica, Arial, sans-serif'; function fit() { shapeCanvas.width = Math.floor(window.innerWidth / gap) * gap; shapeCanvas.height = Math.floor(window.innerHeight / gap) * gap; shapeContext.fillStyle = 'red'; shapeContext.textBaseline = 'middle'; shapeContext.textAlign = 'center'; } function processCanvas() { var pixels = shapeContext.getImageData(0, 0, shapeCanvas.width, shapeCanvas.height).data; dots = [], pixels, x = 0, y = 0, fx = shapeCanvas.width, fy = shapeCanvas.height, w = 0, h = 0; for (var p = 0; p < pixels.length; p += (4 * gap)) { if (pixels[p + 3] > 0) { dots.push(new S.Point({ x: x, y: y })); w = x > w ? x : w; h = y > h ? y : h; fx = x < fx ? x : fx; fy = y < fy ? y : fy; } x += gap; if (x >= shapeCanvas.width) { x = 0; y += gap; p += gap * 4 * shapeCanvas.width; } } return { dots: dots, w: w + fx, h: h + fy }; } function setFontSize(s) { shapeContext.font = 'bold ' + s + 'px ' + fontFamily; } function isNumber(n) { return !isNaN(parseFloat(n)) && isFinite(n); } function init() { fit(); window.addEventListener('resize', fit); } // Init init(); return { imageFile: function (url, callback) { var image = new Image(), a = S.Drawing.getArea(); image.onload = function () { shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.drawImage(this, 0, 0, a.h * 0.6, a.h * 0.6); callback(processCanvas()); }; image.onerror = function () { callback(S.ShapeBuilder.letter('What?')); } image.src = url; }, circle: function (d) { var r = Math.max(0, d) / 2; shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.beginPath(); shapeContext.arc(r * gap, r * gap, r * gap, 0, 2 * Math.PI, false); shapeContext.fill(); shapeContext.closePath(); return processCanvas(); }, letter: function (l) { var s = 0; setFontSize(fontSize); s = Math.min(fontSize, (shapeCanvas.width / shapeContext.measureText(l).width) * 0.8 * fontSize, (shapeCanvas.height / fontSize) * (isNumber(l) ? 1 : 0.45) * fontSize); setFontSize(s); shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.fillText(l, shapeCanvas.width / 2, shapeCanvas.height / 2); return processCanvas(); }, rectangle: function (w, h) { var dots = [], width = gap * w, height = gap * h; for (var y = 0; y < height; y += gap) { for (var x = 0; x < width; x += gap) { dots.push(new S.Point({ x: x, y: y, })); } } return { dots: dots, w: width, h: height }; } }; }()); S.Shape = (function () { var dots = [], width = 0, height = 0, cx = 0, cy = 0; function compensate() { var a = S.Drawing.getArea(); cx = a.w / 2 - width / 2; cy = a.h / 2 - height / 2; } return { shuffleIdle: function () { var a = S.Drawing.getArea(); for (var d = 0; d < dots.length; d++) { if (!dots[d].s) { dots[d].move({ x: Math.random() * a.w, y: Math.random() * a.h }); } } }, switchShape: function (n, fast) { var size, a = S.Drawing.getArea(); width = n.w; height = n.h; compensate(); if (n.dots.length > dots.length) { size = n.dots.length - dots.length; for (var d = 1; d <= size; d++) { dots.push(new S.Dot(a.w / 2, a.h / 2)); } } var d = 0, i = 0; while (n.dots.length > 0) { i = Math.floor(Math.random() * n.dots.length); dots[d].e = fast ? 0.25 : (dots[d].s ? 0.14 : 0.11); if (dots[d].s) { dots[d].move(new S.Point({ z: Math.random() * 20 + 10, a: Math.random(), h: 18 })); } else { dots[d].move(new S.Point({ z: Math.random() * 5 + 5, h: fast ? 18 : 30 })); } dots[d].s = true; dots[d].move(new S.Point({ x: n.dots[i].x + cx, y: n.dots[i].y + cy, a: 1, z: 5, h: 0 })); n.dots = n.dots.slice(0, i).concat(n.dots.slice(i + 1)); d++; } for (var i = d; i < dots.length; i++) { if (dots[i].s) { dots[i].move(new S.Point({ z: Math.random() * 20 + 10, a: Math.random(), h: 20 })); dots[i].s = false; dots[i].e = 0.04; dots[i].move(new S.Point({ x: Math.random() * a.w, y: Math.random() * a.h, a: 0.3, //.4 z: Math.random() * 4, h: 0 })); } } }, render: function () { for (var d = 0; d < dots.length; d++) { dots[d].render(); } } } }()); S.init();
如果你不希望有ui界面上的文字，要纯的烟花，可以在js文件中将 S.UI.simulate(‘除夕节日快乐’);进行注释。
var S = { init: function () { var action = window.location.href, i = action.indexOf('?a='); S.Drawing.init('.canvas'); document.body.classList.add('body--ready'); if (i !== -1) { S.UI.simulate(decodeURI(action).substring(i + 3)); } else { S.UI.simulate('除夕节日快乐'); } S.Drawing.loop(function () { S.Shape.render(); }); } }; S.Drawing = (function () { var canvas, context, renderFn requestFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) { window.setTimeout(callback, 1000 / 60); }; return { init: function (el) { canvas = document.querySelector(el); context = canvas.getContext('2d'); this.adjustCanvas(); window.addEventListener('resize', function (e) { S.Drawing.adjustCanvas(); }); }, loop: function (fn) { renderFn = !renderFn ? fn : renderFn; this.clearFrame(); renderFn(); requestFrame.call(window, this.loop.bind(this)); }, adjustCanvas: function () { canvas.width = window.innerWidth; canvas.height = window.innerHeight; }, clearFrame: function () { context.clearRect(0, 0, canvas.width, canvas.height); }, getArea: function () { return { w: canvas.width, h: canvas.height }; }, drawCircle: function (p, c) { context.fillStyle = c.render(); context.beginPath(); context.arc(p.x, p.y, p.z, 0, 2 * Math.PI, true); context.closePath(); context.fill(); } } }()); S.UI = (function () { var canvas = document.querySelector('.canvas'), interval, isTouch = false, //('ontouchstart' in window || navigator.msMaxTouchPoints), currentAction, resizeTimer, time, maxShapeSize = 30, firstAction = true, sequence = [], cmd = '#'; function formatTime(date) { var h = date.getHours(), m = date.getMinutes(), m = m < 10 ? '0' + m : m; return h + ':' + m; } function getValue(value) { return value && value.split(' ')[1]; } function getAction(value) { value = value && value.split(' ')[0]; return value && value[0] === cmd && value.substring(1); } function timedAction(fn, delay, max, reverse) { clearInterval(interval); currentAction = reverse ? max : 1; fn(currentAction); if (!max || (!reverse && currentAction < max) || (reverse && currentAction > 0)) { interval = setInterval(function () { currentAction = reverse ? currentAction - 1 : currentAction + 1; fn(currentAction); if ((!reverse && max && currentAction === max) || (reverse && currentAction === 0)) { clearInterval(interval); } }, delay); } } function reset(destroy) { clearInterval(interval); sequence = []; time = null; destroy && S.Shape.switchShape(S.ShapeBuilder.letter('')); } function performAction(value) { var action, value, current; // overlay.classList.remove('overlay--visible'); sequence = typeof(value) === 'object' ? value : sequence.concat(value.split('|')); // input.value = ''; // checkInputWidth(); timedAction(function (index) { current = sequence.shift(); action = getAction(current); value = getValue(current); switch (action) { case 'countdown': value = parseInt(value) || 10; value = value > 0 ? value : 10; timedAction(function (index) { if (index === 0) { if (sequence.length === 0) { S.Shape.switchShape(S.ShapeBuilder.letter('')); } else { performAction(sequence); } } else { S.Shape.switchShape(S.ShapeBuilder.letter(index), true); } }, 1000, value, true); break; case 'rectangle': value = value && value.split('x'); value = (value && value.length === 2) ? value : [maxShapeSize, maxShapeSize / 2]; S.Shape.switchShape(S.ShapeBuilder.rectangle(Math.min(maxShapeSize, parseInt(value[0])), Math.min(maxShapeSize, parseInt(value[1])))); break; case 'circle': value = parseInt(value) || maxShapeSize; value = Math.min(value, maxShapeSize); S.Shape.switchShape(S.ShapeBuilder.circle(value)); break; case 'time': var t = formatTime(new Date()); if (sequence.length > 0) { S.Shape.switchShape(S.ShapeBuilder.letter(t)); } else { timedAction(function () { t = formatTime(new Date()); if (t !== time) { time = t; S.Shape.switchShape(S.ShapeBuilder.letter(time)); } }, 1000); } break; default: S.Shape.switchShape(S.ShapeBuilder.letter(current[0] === cmd ? 'What?' : current)); } }, 2000, sequence.length); } function checkInputWidth(e) { if (input.value.length > 18) { ui.classList.add('ui--wide'); } else { ui.classList.remove('ui--wide'); } if (firstAction && input.value.length > 0) { ui.classList.add('ui--enter'); } else { ui.classList.remove('ui--enter'); } } function bindEvents() { document.body.addEventListener('keydown', function (e) { input.focus(); if (e.keyCode === 13) { firstAction = false; reset(); performAction(input.value); } }); canvas.addEventListener('click', function (e) { overlay.classList.remove('overlay--visible'); }); } function init() { bindEvents(); // input.focus(); isTouch && document.body.classList.add('touch'); } // Init init(); return { simulate: function (action) { performAction(action); } } }()); S.UI.Tabs = (function () { var tabs = document.querySelector('.tabs'), labels = document.querySelector('.tabs-labels'), triggers = document.querySelectorAll('.tabs-label'), panels = document.querySelectorAll('.tabs-panel'); function activate(i) { triggers[i].classList.add('tabs-label--active'); panels[i].classList.add('tabs-panel--active'); } function bindEvents() { labels.addEventListener('click', function (e) { var el = e.target, index; if (el.classList.contains('tabs-label')) { for (var t = 0; t < triggers.length; t++) { triggers[t].classList.remove('tabs-label--active'); panels[t].classList.remove('tabs-panel--active'); if (el === triggers[t]) { index = t; } } activate(index); } }); } function init() { activate(0); bindEvents(); } // Init init(); }()); S.Point = function (args) { this.x = args.x; this.y = args.y; this.z = args.z; this.a = args.a; this.h = args.h; }; S.Color = function (r, g, b, a) { this.r = r; this.g = g; this.b = b; this.a = a; }; S.Color.prototype = { render: function () { return 'rgba(' + this.r + ',' + + this.g + ',' + this.b + ',' + this.a + ')'; } }; S.Dot = function (x, y) { this.p = new S.Point({ x: x, y: y, z: 5, a: 1, h: 0 }); this.e = 0.07; this.s = true; this.c = new S.Color(255, 255, 255, this.p.a); this.t = this.clone(); this.q = []; }; S.Dot.prototype = { clone: function () { return new S.Point({ x: this.x, y: this.y, z: this.z, a: this.a, h: this.h }); }, _draw: function () { this.c.a = this.p.a; S.Drawing.drawCircle(this.p, this.c); }, _moveTowards: function (n) { var details = this.distanceTo(n, true), dx = details[0], dy = details[1], d = details[2], e = this.e * d; if (this.p.h === -1) { this.p.x = n.x; this.p.y = n.y; return true; } if (d > 1) { this.p.x -= ((dx / d) * e); this.p.y -= ((dy / d) * e); } else { if (this.p.h > 0) { this.p.h--; } else { return true; } } return false; }, _update: function () { if (this._moveTowards(this.t)) { var p = this.q.shift(); if (p) { this.t.x = p.x || this.p.x; this.t.y = p.y || this.p.y; this.t.z = p.z || this.p.z; this.t.a = p.a || this.p.a; this.p.h = p.h || 0; } else { if (this.s) { this.p.x -= Math.sin(Math.random() * 3.142); this.p.y -= Math.sin(Math.random() * 3.142); } else { this.move(new S.Point({ x: this.p.x + (Math.random() * 50) - 25, y: this.p.y + (Math.random() * 50) - 25, })); } } } d = this.p.a - this.t.a; this.p.a = Math.max(0.1, this.p.a - (d * 0.05)); d = this.p.z - this.t.z; this.p.z = Math.max(1, this.p.z - (d * 0.05)); }, distanceTo: function (n, details) { var dx = this.p.x - n.x, dy = this.p.y - n.y, d = Math.sqrt(dx * dx + dy * dy); return details ? [dx, dy, d] : d; }, move: function (p, avoidStatic) { if (!avoidStatic || (avoidStatic && this.distanceTo(p) > 1)) { this.q.push(p); } }, render: function () { this._update(); this._draw(); } } S.ShapeBuilder = (function () { var gap = 13, shapeCanvas = document.createElement('canvas'), shapeContext = shapeCanvas.getContext('2d'), fontSize = 500, fontFamily = 'Avenir, Helvetica Neue, Helvetica, Arial, sans-serif'; function fit() { shapeCanvas.width = Math.floor(window.innerWidth / gap) * gap; shapeCanvas.height = Math.floor(window.innerHeight / gap) * gap; shapeContext.fillStyle = 'red'; shapeContext.textBaseline = 'middle'; shapeContext.textAlign = 'center'; } function processCanvas() { var pixels = shapeContext.getImageData(0, 0, shapeCanvas.width, shapeCanvas.height).data; dots = [], pixels, x = 0, y = 0, fx = shapeCanvas.width, fy = shapeCanvas.height, w = 0, h = 0; for (var p = 0; p < pixels.length; p += (4 * gap)) { if (pixels[p + 3] > 0) { dots.push(new S.Point({ x: x, y: y })); w = x > w ? x : w; h = y > h ? y : h; fx = x < fx ? x : fx; fy = y < fy ? y : fy; } x += gap; if (x >= shapeCanvas.width) { x = 0; y += gap; p += gap * 4 * shapeCanvas.width; } } return { dots: dots, w: w + fx, h: h + fy }; } function setFontSize(s) { shapeContext.font = 'bold ' + s + 'px ' + fontFamily; } function isNumber(n) { return !isNaN(parseFloat(n)) && isFinite(n); } function init() { fit(); window.addEventListener('resize', fit); } // Init init(); return { imageFile: function (url, callback) { var image = new Image(), a = S.Drawing.getArea(); image.onload = function () { shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.drawImage(this, 0, 0, a.h * 0.6, a.h * 0.6); callback(processCanvas()); }; image.onerror = function () { callback(S.ShapeBuilder.letter('What?')); } image.src = url; }, circle: function (d) { var r = Math.max(0, d) / 2; shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.beginPath(); shapeContext.arc(r * gap, r * gap, r * gap, 0, 2 * Math.PI, false); shapeContext.fill(); shapeContext.closePath(); return processCanvas(); }, letter: function (l) { var s = 0; setFontSize(fontSize); s = Math.min(fontSize, (shapeCanvas.width / shapeContext.measureText(l).width) * 0.8 * fontSize, (shapeCanvas.height / fontSize) * (isNumber(l) ? 1 : 0.45) * fontSize); setFontSize(s); shapeContext.clearRect(0, 0, shapeCanvas.width, shapeCanvas.height); shapeContext.fillText(l, shapeCanvas.width / 2, shapeCanvas.height / 2); return processCanvas(); }, rectangle: function (w, h) { var dots = [], width = gap * w, height = gap * h; for (var y = 0; y < height; y += gap) { for (var x = 0; x < width; x += gap) { dots.push(new S.Point({ x: x, y: y, })); } } return { dots: dots, w: width, h: height }; } }; }()); S.Shape = (function () { var dots = [], width = 0, height = 0, cx = 0, cy = 0; function compensate() { var a = S.Drawing.getArea(); cx = a.w / 2 - width / 2; cy = a.h / 2 - height / 2; } return { shuffleIdle: function () { var a = S.Drawing.getArea(); for (var d = 0; d < dots.length; d++) { if (!dots[d].s) { dots[d].move({ x: Math.random() * a.w, y: Math.random() * a.h }); } } }, switchShape: function (n, fast) { var size, a = S.Drawing.getArea(); width = n.w; height = n.h; compensate(); if (n.dots.length > dots.length) { size = n.dots.length - dots.length; for (var d = 1; d <= size; d++) { dots.push(new S.Dot(a.w / 2, a.h / 2)); } } var d = 0, i = 0; while (n.dots.length > 0) { i = Math.floor(Math.random() * n.dots.length); dots[d].e = fast ? 0.25 : (dots[d].s ? 0.14 : 0.11); if (dots[d].s) { dots[d].move(new S.Point({ z: Math.random() * 20 + 10, a: Math.random(), h: 18 })); } else { dots[d].move(new S.Point({ z: Math.random() * 5 + 5, h: fast ? 18 : 30 })); } dots[d].s = true; dots[d].move(new S.Point({ x: n.dots[i].x + cx, y: n.dots[i].y + cy, a: 1, z: 5, h: 0 })); n.dots = n.dots.slice(0, i).concat(n.dots.slice(i + 1)); d++; } for (var i = d; i < dots.length; i++) { if (dots[i].s) { dots[i].move(new S.Point({ z: Math.random() * 20 + 10, a: Math.random(), h: 20 })); dots[i].s = false; dots[i].e = 0.04; dots[i].move(new S.Point({ x: Math.random() * a.w, y: Math.random() * a.h, a: 0.3, //.4 z: Math.random() * 4, h: 0 })); } } }, render: function () { for (var d = 0; d < dots.length; d++) { dots[d].render(); } } } }()); S.init();
三：js烟花效果
还是先看效果，录制的效果不太好，自己可以去尝试，也是非常好看的。
下面看源码,z这个比较简单，因为没有那么多渲染
<!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" > <head> <title>超炫网页烟花效果</title> </head> <style type="text/css"> .fire{ display:block; overflow:hidden; font-size:12px; position:absolute; } body{ overflow:hidden; background:#000; } html{ overflow:hidden; background:#000; } </style> <body> </body> <script type="text/javascript"> var Fire = function(r, color) { this.radius = r || 12; this.color = color; this.xpos = 0; this.ypos = 0; this.zpos = 0; this.vx = 0; this.vy = 0; this.vz = 0; this.mass = 1; this.x =0; this.y=0; this.p = document.createElement("span"); this.p.className = "fire"; this.p.innerHTML = "*"; this.p.style.fontSize = this.radius + "px"; this.p.style.color = "#" + this.color; } Fire.prototype = { append: function(parent) { parent.appendChild(this.p); }, setSize: function(scale) { this.p.style.fontSize = this.radius * scale + "px"; }, setPosition:function(x, y) { this.p.style.left = x + "px"; this.p.style.top = y + "px"; }, setVisible: function(b) { this.p.style.display = b ? "block" : "none"; } } var fireworks = function() { var fires = new Array(); var count = 150; var fl = 250; var vpx = 500; var vpy = 300; var gravity = .5; var floor = 200; var bounce = -.8; var timer; var wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25; var wpos = 0; var wcount; return { init: function() { wcount = 50 + Math.floor(Math.random() * 100); for (var i=0; i<count; i++) { var color = 0xFF0000; color = (Math.random() * 0xFFFFFF).toString(16).toString().split(".")[0]; while(color.length < 6) { color = "0" + color; } var fire = new Fire(12, color); fires.push(fire); fire.ypos = -100; fire.vz = Math.random() * 6 - 3; fire.vx = (Math.random()*2 - 1)*2 ; fire.vy = Math.random()*-15 - 15; fire.x = 500 fire.y = 600; fire.append(document.body); } var that = this; timer = setInterval(function() { wpos++; if (wpos >= wcount) { wpos = 0; wcount = 50 + Math.floor(Math.random() * 100); wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25; } for (var i=0;i<count; i++) { that.move(fires[i]); } }, 30); }, move: function(fire) { fire.vy += gravity; fire.x += fire.vx; fire.y += fire.vy; fire.vx += wind; fire.setPosition(fire.x, fire.y); if (fire.x < 0 || fire.x >1000 || fire.y < 0 || fire.y > 600) { fire.vx = (Math.random()*2 - 1)*2; fire.vy = Math.random()*-15 - 15; fire.x = 500; fire.y = 600; fire.setPosition(fire.x, fire.y); } } } } fireworks().init(); </script> </html>
四：用python实现的烟花（可以选择背景）
还是先看效果
源码如下
main.py import tkinter as tk from PIL import Image, ImageTk from time import time, sleep from random import choice, uniform, randint from particle import Particle # 颜色选项 colors = ['red', 'blue', 'yellow', 'white', 'green', 'orange', 'purple', 'seagreen', 'indigo', 'cornflowerblue'] HEIGHT = 800 WIDTH = 1200 def simulate(cv): """ 循环调用保持不停 """ t = time() explode_points = [] wait_time = randint(10, 100) numb_explode = randint(5, 50) # 创建一个所有粒子同时扩大的二维列表 for point in range(numb_explode): objects = [] x_cordi = randint(0.05 * WIDTH, 0.95 * WIDTH) y_cordi = randint(0.05 * HEIGHT, 0.95 * HEIGHT) speed = uniform(0.2, 2.) size = uniform(0.2, 3) color = choice(colors) explosion_speed = uniform(0.1, 0.5) explosion_radius = randint(5, 15) total_particles = randint(20, 50) for i in range(1, total_particles): r = Particle(cv, idx=i, total=total_particles, explosion_speed=explosion_speed, explosion_radius=explosion_radius, x=x_cordi, y=y_cordi, vx=speed, vy=speed, color=color, size=size, lifespan=abs(uniform(0.2, 1.75))) objects.append(r) explode_points.append(objects) total_time = .0 # 1.8s内一直扩大 while total_time < 1.8: sleep(0.01) tnew = time() t, dt = tnew, tnew - t for point in explode_points: for item in point: item.update(dt) cv.update() total_time += dt # 循环调用 root.after(wait_time, simulate, cv) def close(*ignore): """退出程序、关闭窗口""" global root root.quit() if __name__ == '__main__': root = tk.Tk() cv = tk.Canvas(root, height=HEIGHT, width=WIDTH) image = Image.open("D:\\python\\pydoc\\pystudy\\project1\\fireworks-master\\__pycache__\\g.jpg") photo = ImageTk.PhotoImage(image) cv.create_image(0, 0, image=photo, anchor='nw') cv.pack() root.protocol("WM_DELETE_WINDOW", close) root.after(100, simulate, cv) root.mainloop()
particle.py
from math import sin, cos, radians # 模拟重力 GRAVITY = 0.1 class Particle(object): def __init__(self, cv, idx, total, explosion_speed, explosion_radius=1, x=0., y=0., vx=0., vy=0., size=2., color='red', lifespan=2): """ 粒子在空中随机生成随机，变成一个圈、下坠、消失 属性: - id: 粒子的id - x, y: 粒子的坐标 - vx, vy: 在坐标的变化速度 - total: 总数 - age: 粒子存在的时长 - color: 颜色 - cv: 画布 - lifespan: 最高存在时长 """ self.id = idx self.x = x self.y = y self.initial_speed = explosion_speed self.explosion_radius = explosion_radius self.vx = vx self.vy = vy self.total = total self.age = 0 self.color = color self.cv = cv self.cid = self.cv.create_oval( x - size, y - size, x + size, y + size, fill=self.color) self.lifespan = lifespan def update(self, dt): self.age += dt # 粒子范围扩大 if self.alive() and self.expand(): move_x = cos(radians(self.id * 360 / self.total)) * self.initial_speed move_y = sin(radians(self.id * 360 / self.total)) * self.initial_speed self.cv.move(self.cid, move_x * self.explosion_radius, move_y * self.explosion_radius) self.vx = move_x / (float(dt) * 1000) # 以自由落体坠落 elif self.alive(): move_x = cos(radians(self.id * 360 / self.total)) # we technically don't need to update x, y because move will do the job self.cv.move(self.cid, self.vx + move_x, self.vy + GRAVITY * dt) self.vy += GRAVITY * dt # 移除超过最高时长的粒子 elif self.cid is not None: self.cv.delete(self.cid) self.cid = None # 扩大的时间 def expand(self): return self.age <= 1.2 # 粒子是否在最高存在时长内 def alive(self): return self.age <= self.lifespan
然后自己存放一个放置图片的路径即可
