canvas实现鼠标交互鱼鳞变色动画效果代码-html代码-BFW代码库

canvas实现鼠标交互鱼鳞变色动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现鼠标交互鱼鳞变色动画效果代码

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;
  overflow: hidden;
  /*  cursor: pointer; */
}
</style>


</head>

<body translate="no">
  
  
      <script>
"use strict";

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

// for animation
let messages;
let dx, dy, radius;
let nbx, nby;
let colors;
let grid;
let sn;
let mousePos, currentPos;

// 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 mPIS3 = Math.PI / 3;
const m2PI = Math.PI * 2;
const m2PIS3 = Math.PI * 2 / 3;
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;

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

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 (typeof maxi == "undefined") return mfloor(mini * mrandom()); // range 0..mini - 1
  return mini + mfloor(mrandom() * (maxi - mini)); // range mini .. maxi - 1
}
//------------------------------------------------------------------------
function lerp(p0, p1, alpha) {
  return {
    x: p1.x * alpha + p0.x * (1 - alpha),
    y: p1.y * alpha + p0.y * (1 - alpha) };

}
//------------------------------------------------------------------------
// S I M P L E X   N O I S E
//------------------------------------------------------------------------
/* simplified by Dillon https://codepen.io/Dillo
        The original file contains noise2D.........完整代码请登录后点击上方下载按钮下载查看