canvas扇贝壳背景效果-html代码-BFW代码库

canvas扇贝壳背景效果

代码语言：html

所属分类：背景

代码描述：canvas扇贝壳背景效果

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";

/**** parameters you should try to modify */

const minRadius = 25;
const maxRadius = 150;
const margin = 2; // minimum distance between 2 circles

/**** modifications beyond this line at your own risk */

let canv, ctx;
let maxx, maxy; // canvas sizes (in pixels)

let circles;

let events = [];


// 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;

//-----------------------------------------------------------------------------
// miscellaneous functions
//-----------------------------------------------------------------------------

function alea(min, max) {
  // random number [min..max[ . If no max is provided, [0..min[

  if (typeof max == 'undefined') return min * mrandom();
  return min + (max - min) * mrandom();
}

// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
.........完整代码请登录后点击上方下载按钮下载查看