文章目录：
一：放烟花
1. 运行效果
2.代码
二：新年快乐
1.运行效果
2.代码
一：放烟花
1. 运行效果
效果图◕‿◕✌✌✌
过年过节通过html+css+js实现放烟花效果代码(含背景音乐)
2.代码
修改后缀为".html"的格式，如何在浏览器打开
<!DOCTYPE html> <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>带你赏烟花</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;color:#999;font:100%/18px helvetica, arial, sans-serif}body{background-image:url('https://pic.imgdb.cn/item/65904a9dc458853aef39cba8.png');no-repeat：background-image;background-size:100% 100%;color:#999;font:100%/18px helvetica, arial, sans-serif}canvas{cursor:crosshair;display:block;left:0;position:absolute;top:0;z-index:20}</style></head><body><audio src="https://www.joy127.com/url/108693.mp3" autoplay loop controls hidden></audio><script type="text/javascript" src="https://cdn.bootcss.com/jquery/3.2.0/jquery.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 = $(window).innerHeight(); self.particles = []; self.partCount = 500; //密集度self.fireworks = []; self.mx = self.cw/2;self.my = self.ch/2;self.currentHue = 30;self.partSpeed = 3; //大小self.partSpeedVariance = 15; //爆炸范围self.partWind =10; //线条形状self.partFriction = 10; //烟花大小self.partGravity = 1; //下坠self.hueMin = 0;self.hueMax = 500; //颜色self.fworkSpeed = 2; //速度self.fworkAccel = 5; //导向显示self.hueVariance = 5;self.flickerDensity = 250;self.showShockwave = true;self.showTarget = false;self.clearAlpha = 70; //消失的速度$(document.body).append(self.canvas);self.ctx = self.canvas.getContext('2d');self.ctx.lineCap = 'round';self.ctx.lineJoin = 'round'; self.lineWidth = 1; //粗细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 < .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';},1);});window.onload=function(){tttt()}var tttt = setInterval(function(){var e={'pageX':Math.random()*1900,'pageY':Math.random()*900}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); },50) }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();});window.onload = function() {var music = new Audio("music.mp3");music.play();};</script></body> </html>
二：新年快乐
1.运行效果
2.代码
<!doctype html> <html> <head> <meta charset="utf-8"> <title>新年快乐</title><style> 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>/*Shape Shifter=============A canvas experiment by Kenneth Cachiahttp://www.kennethcachia.comUpdated code------------https://github.com/kennethcachia/Shape-Shifter*/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('|#countdown 3||新|年|快|乐|#rectangle|');}S.Drawing.loop(function () {S.Shape.render();});} };S.Drawing = (function () {var canvas,context,renderFnrequestFrame = 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 ? 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'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');}// Initinit();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();}// Initinit(); }());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);}// Initinit();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, //.4z: Math.random() * 4,h: 0}));}}},render: function () {for (var d = 0; d < dots.length; d++) {dots[d].render();}}} }());S.init();</script></body> </html>
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