canvas实现点击换色的漩涡动画效果代码-html代码-BFW代码库

canvas实现点击换色的漩涡动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现点击换色的漩涡动画效果代码

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 () {
  let canv, ctx; // canvas and context
  let maxx, maxy; // canvas dimensions

  // for animation
  let messages;
  let cent;
  let mouse = {};

  // 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 m2PI = Math.PI * 2;
  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 (typeo.........完整代码请登录后点击上方下载按钮下载查看