多彩泡泡效果-html代码-BFW代码库

多彩泡泡效果

代码语言：html

所属分类：粒子

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">


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

<script>
"use strict";

/* initially inspired by the ideas given by Louis Hoebregts in his pen :
              https://codepen.io/Mamboleoo/full/XWJPxpZ */

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

  let idAnim;

  const initSpeed = 1;
  const rMin = 15;
  const rMax = 55;
  let canv, ctx; // canvas and context : global variables (I know :( )
  let maxx, maxy; // canvas sizes (in pixels)
  let particles;
  let click;
  let initDir;
  let noiseInitDir;
  let initHue;
  let noiseInitHue;
  let mouseX = -100,mouseY = -100; // init to unreachable value

  /*	============================================================================
  	This 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
  	============================================================================
  */
  /*
     function Mash() {
     	var n = 0xefc8249d;
     	var mash = function(data) {
     		if ( data ) {
     			data = data.toString();
     			for (var i = 0; i < data.length; i++) {
     				n += data.charCodeAt(i);
     				var h = 0.02519603282416938 * n;
     				n = h >>> 0;
     				h -= n;
     				h *= n;
     				n = h >>> 0;
     				h -= n;
     				n += h * 0x100000000; // 2^32
     			}
     			return (n >>> 0) * 2.3283064365386963e-10; // 2^-32
     		} else n = 0xefc8249d;
     	};
       return mash;
     }
     
       const mrandom = (function () {
         let mash = Mash(); return () => mash(1);
       })();// Math.random;
     */
  // 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;

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