刺绣背景效果-html代码-BFW代码库

刺绣背景效果

代码语言：html

所属分类：背景

代码描述：刺绣背景效果

代码标签：

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;
}
</style>

</head>
<body translate="no">


<script >
"use strict";

window.addEventListener("load", function () {

  const triWidthMin = 5; // length of triangle side 5..triWidthMax
  const triWidthMax = 20; // length of triangle side triWidthMin..50
  const DHUE = 1; // integer 1-10 - hue change by step
  const DLUM = 1; // 0.1 - 5 - lightness change by step
  const GAPTRI = -0.5; // -0.5 for black thin line between triangles, +1 for no gap

  let canv, ctx; // canvas and context
  let canvbg, ctxbg; // background canvas and context

  let maxx, maxy; // canvas dimensions

  let triWidth;
  let triHeight;
  let grid;
  let nbx, nby;
  let hnbx, hnby; // number of triangles in the half of the width, height of the canvas

  let groups;
  let listReachable;

  // for animation
  let tStampRef; // time stamp ref for animation
  let animState;
  let events;
  let currGrp;
  let colorMode;
  let hue, dhue;
  let lum, dlum;

  // 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 m2PI = Math.PI * 2;
  const msin = Math.sin;
  const mcos = Math.cos;
  const matan2 = Math.atan2;

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

  const rac3 = msqrt(3);
  const rac3s2 = rac3 / 2;
  const mPIS3 = Math.PI / 3;

  const sinPIS6 = 0.5;
  const cosPIS6 = rac3s2;
  const sinPIS3 = cosPIS6;
  const cosPIS3 = sinPIS6;

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

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

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

    return mini + mrandom() *.........完整代码请登录后点击上方下载按钮下载查看