线条变换美丽的效果-html代码-BFW代码库

线条变换美丽的效果

代码语言：html

所属分类：动画

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">

<script>
window.requestAnimFrame = (function() {
  return (
    window.requestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    window.oRequestAnimationFrame ||
    window.msRequestAnimationFrame ||
    function(callback) {
      window.setTimeout(callback);
    }
  );
});

function init(elemid) {
  let canvas = document.getElementById(elemid),
    c = canvas.getContext("2d"),
    w = (canvas.width = window.innerWidth),
    h = (canvas.height = window.innerHeight);
  c.fillStyle = "rgba(30,30,30,1)";
  c.fillRect(0, 0, w, h);
  return {c:c,canvas:canvas};
}
</script>
<style>
body,
html {
  margin: 0px;
  padding: 0px;
  position: fixed;
  background: rgb(30,30,30);
</style>

</head>
<body translate="no">
<canvas id="canvas"></canvas>
<script>
window.onload = function () {
  let c = init("canvas").c,
  canvas = init("canvas").canvas,
  w = canvas.width = window.innerWidth,
  h = canvas.height = window.innerHeight,
  mouse = { x: w / 2, y: h / 2 },
  last_mouse = {};

  let n = 2000,
  herd = [];

  class point {
    constructor() {
      this.targetIndex = [Math.floor(Math.random() * n)];
      this.f = 10;
      this.ang = Math.random() * 2 * Math.PI;
      this.x = w / 2; //Math.random()*w;
      this.y = h / 2; //Math.random()*h;
      this.ax = this.f * Math.cos(this.ang);
      this.ay = this.f * Math.sin(this.ang);
      this.vx = this.ax;
      this.vy = this.ay;
      this.x += this.vx;
      this.y += this.vy;
      this.nd = Math.random() * 50 + 0.1;
    }
    follow(arr) {
      this.t = { x: 0, y: 0, sumx: 0, sumy: 0 };
      this.count = 0;
      for (let i = 0; i < this.targetIndex.length; i++) {
        this.t.sumx += arr[this.targetIndex[i]].x;
        this.t.sumy += arr[this.targetIndex[i]].y;
        t.........完整代码请登录后点击上方下载按钮下载查看