粒子海葵开放动画效果-html代码-BFW代码库

粒子海葵开放动画效果

代码语言：html

所属分类：粒子

代码描述：粒子海葵开放动画效果

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 >

<script>
"use strict";

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

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

  const initSpeed = 1;
  const rMin = 1;
  const rMax = 10;
  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 mouse = { x: 0, y: 0 };
  let org = { x: 0, y: 0 };
  let mouseMoved = false;
  let hue;
  // 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();
  }

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

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

    if (typeof max == 'undefined') {
      max = min;min = 0;
    }
    return mfloor(min + (max - min) * mrandom());
  } // intAlea

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