canvas实现立方体随机堆叠背景效果代码-html代码-BFW代码库

canvas实现立方体随机堆叠背景效果代码

代码语言：html

所属分类：背景

代码描述：canvas实现立方体随机堆叠背景效果代码

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>
body {
  font-family: Arial, Helvetica, "Liberation Sans", FreeSans, sans-serif;
  background-color: #000;
  margin: 0;
  padding: 0;
  border-width: 0;
  cursor: pointer;
}
</style>


  
  
</head>

<body>
  
  
      <script >
"use strict";

window.addEventListener("load", function () {
  const DIST_BRIDSON_MIN = 0.05; // size of pattern - relative to canvas size
  const DIST_BRIDSON_MAX = 0.1;

  let canv, ctx; // canvas and context
  let maxx, maxy; // canvas dimensions
  let tr, distBridson;
  let rhombuses, offsetAngle;
  let gr;

  // for animation
  let messages;

  // shortcuts for Math.
  const mrandom = Math.random;
  const mfloor = Math.floor;
  const mround = Math.round;
  const mceil = Math.ceil;
  const mabs = Math.abs;
  const mmin = Math.min;
  const mmax = Math.max;

  const mPI = Math.PI;
  const mPIS2 = Math.PI / 2;
  const mPIS3 = Math.PI / 3;
  const m2PI = Math.PI * 2;
  const m2PIS3 = Math.PI * 2 / 3;
  const msin = Math.sin;
  const mcos = Math.cos;
  const matan2 = Math.atan2;

  const mhypot = Math.hypot;
  const msqrt = Math.sqrt;

  //------------------------------------------------------------------------

  function alea(mini, maxi) {
    // random number in given range

    if (typeof maxi == "undefined") return mini * mrandom(); // range 0..mini

    return mini + mrandom() * (maxi - mini); // range mini..maxi
  }
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  function intAlea(mini, maxi) {
    // random integer in given range (mini..maxi - 1 or 0..mini - 1)
    //
    if (typeof maxi == "undefined") return mfloor(mini * mrandom()); // range 0..mini - 1
    return mini + mfloor(mrandom() * (maxi - mini)); // range mini .. maxi - 1
  }
  // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  /*	============================================================================
  This hash function is based upon Johannes Baagoe's carefully designed and efficient hash
  function for use with JavaScript.  It has a proven "avalanche" effect such
  that every bit of the input affects every bit of the output 50% of the time,
  which is good.	See: http://baagoe.com/en/RandomMusings/hash/avalanche.xhtml
  ============================================================================
  */
  /* This function returns a hash function depending on a seed.
       if no seed is provided (or a falsy value), Math.random() is used.
      The returned function always returns the same number in the range [0..1[ for the
      same value of the argument. This argument may be a String or a Number or anything else
      which can be 'toStringed'
      Two returned functions obtained with two equal seeds are equivalent.
      */


  function hashFunction(seed) {
    let n0 = 0xefc8249d;
    let n = n.........完整代码请登录后点击上方下载按钮下载查看