js实现canvas图案炫光动画效果代码-html代码-BFW代码库

js实现canvas图案炫光动画效果代码

代码语言：html

所属分类：动画

代码描述：js实现canvas图案炫光动画效果代码

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>
* {
  padding: 0;
  margin: 0;
  overflow: hidden;
}
</style>

  <script>
  window.console = window.console || function(t) {};
</script>

  
  
  <script>
  if (document.location.search.match(/type=embed/gi)) {
    window.parent.postMessage("resize", "*");
  }
</script>


</head>

<body >
  

  
      <script >
// Referenced / https://tomari.org/main/java/kyokusen/top.html
// Thank you so much.

var W, M, c, C, WW, WH, CW, CH,
depth, angle, length, startX, startY, pos, mx, my, radian,
animationId;

var getRandomNumber = function (min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
};

var makeCanvas = function () {
  document.
  getElementsByTagName("body")[0].
  appendChild(document.createElement("canvas"));
};

var initialize = function () {
  W = window;
  M = Math;
  c = document.getElementsByTagName("canvas")[0];
  C = c.getContext("2d");
  WW = c.width = M.floor(W.innerWidth);
  WH = c.height = M.floor(W.innerHeight);
  CW = WW / 2;
  CH = WH / 2;
  depth = 5;
  length = 15;
  angle = 0;
  radian = 0;
  startX = CW - length * 31 / 2;
  startY = CH - length * 31 / 2;
  mx = 0;
  my = 0;
  pos = [];
  c.style.background = 'black';

  fractal(90, depth);
};

var getCoordinate = function () {
  var rad = angle * Math.PI / 180;
  var nx = M.cos(rad) * length + startX;
  var ny = M.sin(rad) * length + startY;
  var middlex = M.cos(rad) * (length / 2) + startX;
  var middley = M.sin(rad) * (length / 2) + startY;
  var dx = nx - CW;
  var dy = ny - CH;
  var dist = M.sqrt(dx * dx + dy * dy) * 0.01;
  var atan = M.atan2(dy, dx);
  pos.push([startX, startY, nx, ny, dist, atan, middlex, middley]);
  startX = nx;
  startY = ny;
};

var turn = function (increaseNumber) {
  angle += increaseN.........完整代码请登录后点击上方下载按钮下载查看