canvas实现鼠标跟随可交互的波浪线动画i效果代码-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：canvas实现鼠标跟随可交互的波浪线动画i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 {
  width: 100vw;
  height: 100vh;
  background: #f40c3f;
}

a-waves {
  --x: -0.5rem;
  --y: 50%;
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
a-waves:before {
  position: absolute;
  top: 0;
  left: 0;
  width: 0.5rem;
  height: 0.5rem;
  background: #160000;
  border-radius: 50%;
  transform: translate3d(calc(var(--x) - 50%), calc(var(--y) - 50%), 0);
  will-change: transform;
  content: "";
}
a-waves canvas {
  display: block;
  width: 100%;
  height: 100%;
}
</style>


  
</head>

<body translate="no">
  <a-waves>
  <canvas class="js-canvas"></canvas>
</a-waves>

      <script >
      class Noise {
  constructor(seed = 0) {
    this.grad3 = [
      new Grad(1, 1, 0), new Grad(-1, 1, 0), new Grad(1, -1, 0), new Grad(-1, -1, 0),
      new Grad(1, 0, 1), new Grad(-1, 0, 1), new Grad(1, 0, -1), new Grad(-1, 0, -1),
      new Grad(0, 1, 1), new Grad(0, -1, 1), new Grad(0, 1, -1), new Grad(0, -1, -1)
    ];

    this.p = [151,160,137,91,90,15,
      131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,
      190, 6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,
      88,237,149,56,87,174,20,125,136,171,168, 68,175,74,165,71,134,139,48,27,166,
      77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,
      102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,
      135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,
      5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,
      223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,
      129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,
      251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,
      49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,
      138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180];

    this.perm = new Array(512);
    this.gradP = new Array(512);

    this.seed(seed);
  }

  /**
   * Seed function
   */
  seed(seed) {
    if(seed > 0 && seed < 1) {
      seed *= 65536;
    }

    seed = Math.floor(seed);
    if(seed < 256) {
      seed |= seed << 8;
    }

    for(let i = 0; i < 256; i++) {
      let v;
      if(i & 1) {
        v = this.p[i] ^ (seed & 255);
      } else {
        v = this.p[i] ^ ((seed>>8) & 255);
      }

      this.perm[i] = this.perm[i + 256] = v;
      this.gradP[i] = this.gradP[i + 256] = this.grad3[v % 12];
    }
  }

  /**
   * Fade function
   */
  fade(t) {
    return t * t * t * (t * (t * 6 - 15) + 10);
  }

  /**
   * Lerp function
   */
  lerp(a, b, t) {
    return (1 - t) * a + t * b;
  }

  /**
   * Perlin 2D noise
   */
  perlin2(x, y) {
    let X = Math.floor(x);
    let Y = Math.floor(y);

    x -= X;
    y -= Y;

    X = X & 255;
    Y = Y & 255;

    const n00 = this.gradP[X + this.perm[Y]].dot2(x, y);
    const n01 = this.gradP[X + this.perm[Y + 1]].dot2(x, y - 1);
    const n10 = this.gradP[X + 1 + this.perm[Y]].dot2(x - 1, y);
    const n11 = this.gradP[X + 1 + this.perm[Y + 1]].dot2(x - 1, y - 1);

    const u = this.fade(x);

    return this.lerp(this.lerp(n00, n10, u), this.lerp(n01, n11, u), this.fade(y));
  }
}

class Grad {
  constructor(x, y, z) {
    this.x = x;
    this.y = y;
    this.z = z;
  }

  dot2(x, y) {
    return this.x * x + this.y * y;
  }

  dot3(x, y, z) {
    return this.x * x + this.y * y + this.z * z;
  }
}
class AWaves extends HTMLElement {
  /**
   * Init
   */
  connectedCallback() {
    // Elements
    this.canvas = this.querySelector(".js-canvas");
    this.ctx = this.canvas.getContext("2d");

    // Properties
    this.mouse = {
      x: -10,
      y: 0,
      lx: 0,
      ly: 0,
      sx: 0,
      sy: 0,
      v: 0,
      vs: 0,
      a: 0,
      set: false };


    this.lines = [];
    this.noise = new Noise(Math.random());

    // Init
    this.setSize();
    this.setLines();

    this.bindEvents();

    // RAF
    requestAnimationFrame(this.tick.bind(this));
  }

  /**
   * Bind events
   */
  bindEvents() {
    window.addEventListener("resize", this.onResize.bind(this));

    window.addEventListener("mousemove", this.onMouseMove.bind(this));
    this.addEventListener("touchmove", this.onTouchMove.bind(this));
  }

  /**
   * Resize handler
   */
  onResize() {
    this.setSize();
    this.setLines();
  }

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