canvas情人节快乐长条生长动画效果代码-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：canvas情人节快乐长条生长动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开


<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">

  
  
<style>
html {
  background-color: #000;
}
body,
html,
.happy-valentines {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
.happy-valentines {
  -webkit-transition: all 1s ease;
  -moz-transition: all 1s ease;
  transition: all 1s ease;
  position: absolute;
  text-align: center;
  top: 100px;
  margin: -0.5em auto 0 auto;
  color: #ff81fc;
  -webkit-text-shadow: 0 -1px 1px #fff, 0 1px 1px #fff;
  -moz-text-shadow: 0 -1px 1px #fff, 0 1px 1px #fff;
  text-shadow: 0 -1px 1px #fff, 0 1px 1px #fff;
  font-family: 'La Belle Aurore', cursive;
  opacity: 0;
  font-size: 10em;
  -webkit-filter: blur(0.2em);
}
.happy-valentines:hover,
.start {
  opacity: 1;
  font-size: 2em;
  -webkit-filter: blur(0.02em);
  -moz-filter: blur(0.02em);
  filter: blur(0.02em);
}
.dribbble {
  position: fixed;
  display: block;
  right: 20px;
  bottom: 20px;
}
.dribbble img {
  display: block;
  height: 28px;
}
.twitter {
  position: fixed;
  display: block;
  right: 64px;
  bottom: 14px;
}
.twitter svg {
  width: 32px;
  height: 32px;
  fill: #1da1f2;
}
</style>




</head>

<body >
  <link href='https://fonts.googleapis.com/css?family=La+Belle+Aurore' rel='stylesheet' type='text/css'>
<canvas id="nCanvasRender"></canvas>
<div id="nValentinesText" class="happy-valentines start">
  Happy Valentines Day
</div>



 
      <script >
(function() {
  // Hungarian notation
  // (http://en.wikipedia.org/wiki/Hungarian_notation)
  // n - HTML-Node
  // o - object
  // s - string
  // i - integer
  // a - array
  // b - boolean
  // f - float
  // p - Particle
  // fn - function
  // ctx - 2D Context

  // General Functions
  var app, fnAddEventListener, fnRequestAnimationFrame;

  fnRequestAnimationFrame = function(fnCallback) {
    var fnAnimFrame;
    fnAnimFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(fnCallback) {
      window.setTimeOut(fnCallback, 1000 / 60);
    };
    fnAnimFrame(fnCallback);
  };

  // Add Event Listener
  fnAddEventListener = function(o, sEvent, fn) {
    if (o.addEventListener) {
      o.addEventListener(sEvent, fn, false);
    } else {
      o['on' + sEvent] = fn;
    }
  };

  app = function() {
    var Particle, ctxRender, fPI, fnCos, fnNextFrame, fnRender, fnRnd, fnSetSize, fnSin, fnSwapList, fnTextFadeOut, h, nBody, oBuffer, oDoc, oRender, w;
    // General Elements
    oDoc = document;
    nBody = oDoc.body;
    fPI = Math.PI;
    fnRnd = Math.random;
    fnCos = Math.cos;
    fnSin = Math.sin;
    fnTextFadeOut = function() {
      nValentinesText.setAttribute('class', 'happy-valentines');
    };
    setTimeout(fnTextFadeOut, 3000);
    ctxRender = nCanvasRender.getContext('2d');
    oRender = {
      pFirst: null
    };
    oBuffer = {
      pFirst: null
    };
    w = h = 0;
    // gets/sets size
    fnSetSize = function() {
      nCanvasRender.width = w = window.innerWidth;
      nCanvasRender.height = h = 400; // window.innerHeight
      return {
        w: w,
        h: h
      };
    };
    fnSetSize();
    
    // window.onresize
    fnAddEventListener(window, 'resize', fnSetSize);
    fnSwapList = function(p, oSrc, oDst) {
      if (p != null) {
        // remove p from oSrc
        if (oSrc.pFirst === p) {
          oSrc.pFirst = p.pNext;
          if (p.pNext != null) {
            p.pNext.pPrev = null;
          }
        } else {
          p.pPrev.pNext = p.pNext;
          if (p.pNext != null) {
            p.pNext.pPrev = p.pPrev;
          }
        }
      } else {
        // create new p
        p = new Particle();
      }
      p.pNext = oDst.pFirst;
      if (oDst.pFirst != null) {
        oDst.pFirst.pPrev = p;
      }
      oDst.pFirst = p;
      p.pPrev = null;
      return p;
    };
    Particle = (function() {
      var bIsDead;

      
        // Particle
      class Particle {
        fnInit() {
          var fAngle, fForce, iRndColor, p;
          p = this;
          iRndColor = ~~(fnRnd() * 128);
          p.aColor = [128 + iRndColor, 0 + iRndColor, 0 + iRndColor, 1];
          fAngle = fnRnd() * fPI * 2;
          fForce = 1 + 0.5 * fnRnd();
          p.bIsDead = false;
          p.iPosition = fnRnd() < 0.5 ? 1 : -1;
          p.iFramesAlive = 0;
          p.fX = (w / 2) + 150 * p.iPosition;
          p.fY = 0;
          p.fVX = fForce * fnCos(fAngle);
        .........完整代码请登录后点击上方下载按钮下载查看