粒子流流动动画效果-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：粒子流流动动画效果

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>
@import url("https://fonts.googleapis.com/css2?family=Rajdhani:wght@500&display=swap");
* {
  margin: 0;
  padding: 0;
}

html,
body {
  font-family: "Rajdhani", sans-serif;
  overflow: hidden;
}

body {
  position: relative;
  background: #000;
}

main {
  z-index: 2;
  color: #fff;
  position: fixed;
  top: 50%;
  left: 1.6rem;
  transform: translateY(-50%);
}

h1 {
  font-size: 2.4rem;
}

h1 > span {
  font-size: 1.6rem;
}

p.checkbox {
  color: #fff;
  font-size: 1.6rem;
}

input[type="checkbox"] {
  height: 1rem;
  width: 1rem;
}

p {
  padding: 0.8rem 0 0 0;
}
</style>


</head>

<body translate="no" >
  <main>
  <h1>Digital Stream</h1>
  <p>Please moving the mouse or scroll.</p>
  <p class="checkbox"><input id="checkbox" type="checkbox"><label for="checkbox"> Crack?</label></p>
</main>


  <script src='https://cdnjs.cloudflare.com/ajax/libs/simplex-noise/2.4.0/simplex-noise.min.js'></script>
  
      <script>
/*
* File Name / digitalStream.js
* Created Date / Sep 07, 2020
* Aurhor / Toshiya Marukubo
* Twitter / https://twitter.com/toshiyamarukubo
*/

/*
     Common Tool.
   */

class Tool {
  // random number.
  static randomNumber(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min);
  }
  // random color rgb.
  static randomColorRGB() {
    return (
      "rgb(" +
      this.randomNumber(0, 255) +
      ", " +
      this.randomNumber(0, 255) +
      ", " +
      this.randomNumber(0, 255) +
      ")");

  }
  // random color hsl.
  static randomColorHSL(hue, saturation, lightness) {
    return (
      "hsl(" +
      hue +
      ", " +
      saturation +
      "%, " +
      lightness +
      "%)");

  }
  // gradient color.
  static gradientColor(ctx, cr, cg, cb, ca, x, y, r) {
    const col = cr + "," + cg + "," + cb;
    const g = ctx.createRadialGradient(x, y, 0, x, y, r);
    g.addColorStop(0, "rgba(" + col + ", " + ca * 1 + ")");
    g.addColorStop(0.5, "rgba(" + col + ", " + ca * 0.5 + ")");
    g.addColorStop(1, "rgba(" + col + ", " + ca * 0 + ")");
    return g;
  }}


/*
       When want to use angle.
     */

class Angle {
  constructor(angle) {
    this.a = angle;
    this.rad = this.a * Math.PI / 180;
  }

  incDec(num) {
    this.a += num;
    this.rad = this.a * Math.PI / 180;
    return this.rad;
  }}


/*
       When want to use controller.
     */

class Controller {
  constructor(id) {
    this.id = document.getElementById(id);
  }
  getVal() {
    return this.id.value;
  }}


let canvas;
const simplex = new SimplexNoise();

class Canvas {
  constructor(bool) {
    // create canvas.
    this.canvas = document.createElement("canvas");
    // if on screen.
    if (bool === true) {
      this.canvas.style.position = 'fixed';
      this.canvas.style.display = 'block';
      this.canvas.style.top = 0;
      this.canvas.style.left = 0;
      document.getElementsByTagName("body")[0].appendChild(this.canvas);
    }
    this.ctx = this.canvas.getContext("2d");
    this.width = this.canvas.width = window.innerWidth;
    this.height = this.canvas.height = window.innerHeight;
    // mouse infomation.
    this.mouseX = null;
    this.mouseY = null;
    // controller
    this.checkbox = document.getElementById('checkbox');
    // Shape
    this.shapes = [];
    this.width > this.height ? this.size = 20 : this.size = 20;
    this.xNum = this.width / this.size + 1;
    this.yNum = this.height / this.size + 1;
    this.noiseDist = 100;
    this.glitch;
    this.flg = this.checkbox.checked;
  }

  // init, render, resize
  init() {
    for (let x = 0; x < this.xNum; x++) {
      if (this.shapes.length > 2000) break;
      for (let y = 0; y < this.yNum; y++) {
        let s = new Shape(this.ctx, x * this.size, y * this.size, this.size);
        this.shapes.push(s);
      }
    }
    this.glitch = new Glitch(this.ctx);
  }

  render() {
    //this.ctx.clearRect(0, 0, this.width, this.height);
    this.ctx.globalCompositeOperation = "darken";
    this.ctx.globalAlpha = 0.03;
    this.ctx.fillStyle = "rgb(0,0,0)";
    this.ctx.fillRect(0, 0, this.width, this.height);
    this.ctx.globalCompositeOperation = "source-over";
    this.ctx.globalAlpha = 1;
    for (let i = 0; i < this.shapes.length; i++) {
      this.shapes[i].render();
    }
    if (this.flg === true && Math.random() < 0.3) this.glitch.render();
  }

  resize() {
    this.width = this.canvas.width = window.innerWidth;
    this.height = this.canvas.height = window.innerHeight;
    this.shapes = [];
    this.width > this.height ? this.size = 20 : this.size = 20;
    this.xNum = this.width / this.size + 1;
    this.yNum = this.height / this.size + 1;
    this.init();
  }}


/*
       Shape class.
     */

class Shape {
  constructor(ctx, x, y, r) {
    this.ctx = ctx;
    this.init(x, y, r);
  }

  init(x, y, r) {
    this.x = x;
    this.y = y;
    this.r = r;
    this.t = 1000;
    this.a = new Angle(0);
    if (canvas.width > canvas.height) {
      this.v = {
        x: 1,
        y: 0 };

    } else {
      this.v = {
        x: 0,
        y: -1 };

    }
    this.l = Tool.randomNumber(10, 100);
  }

  draw() {
    const ctx = this.ctx;
    const color = simplex.noise3D(this.x / 1000, this.y / 1000, this.t) * Math.sin(this.a.rad * 1.........完整代码请登录后点击上方下载按钮下载查看