js实现canvas竹子编织面动画效果代码-html代码-BFW代码库

js实现canvas竹子编织面动画效果代码

代码语言：html

所属分类：动画

代码描述：js实现canvas竹子编织面动画效果代码

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">

  

</head>

<body>
  


  
      <script >
"use strict"; // Paul Slaymaker, paul25882@gmail.com
const body = document.getElementsByTagName("body").item(0);
body.style.background = "#000";
body.style.display = "grid";
const TP = 2 * Math.PI;
const CSIZE = 400;

const ctx = (() => {
  let d = document.createElement("div");
  d.style.textAlign = "center";
  body.append(d);
  let c = document.createElement("canvas");
  c.width = 2 * CSIZE;
  c.height = 2 * CSIZE;
  c.style.border = "10px gray outset";
  d.append(c);
  return c.getContext("2d");
})();

var getRandomInt = (min, max, low) => {
  if (low) {
    return Math.floor(Math.random() * Math.random() * (max - min)) + min;
  } else {
    return Math.floor(Math.random() * (max - min)) + min;
  }
};

onresize = function () {
  let D = Math.min(window.innerWidth, window.innerHeight) - 40;
  ctx.canvas.style.width = D + "px";
  ctx.canvas.style.height = D + "px";
};
ctx.translate(CSIZE, CSIZE);
ctx.lineCap = "round";

const COUNT = 20; // factor of CSIZE?
var edge = 360;
var seg = 300;

var colors = []; // as object
var setColors = () => {
  colors = [];
  //let K=COUNT/2;
  let K = getRandomInt(2, COUNT / 2 - 2);
  let hue = getRandomInt(0, 180, true) + 30;
  for (let i = 0; i < K; i++) {
    let hd = Math.round(360 / K) + getRandomInt(-20, 20);
    let sat = 70 + getRandomInt(0, 31);
    let lum = 40 + getRandomInt(0, 31);
    //colors.push("hsla("+((hue+i*hd)%360)+","+sat+"%,"+lum+"%,0.6)");
    colors.push("hsl(" + (hue + i * hd) % 360 + "," + sat + "%," + lum + "%)");
  }
};

var cindexh = [];
var cindexv = [];
var setColorIndexes = () => {
  cindexh = [];
  cindexv = [];
  for (let i = 0; i < COUNT / 2 - 1; i++) {
    cindexh.push(i % colors.length);
    cindexv.push(i % colors.length);
  }
  //  (()=>{
  let no = [];
  do no.push(cindexh.splice(getRandomInt(0, cindexh.length), 1)[0]); while (
  cindexh.length > 0);
  cindexh = no;
  no = [];
  do no.push(cindexv.splice(getRandomInt(0, cindexv.length), 1)[0]); while (
  cindexv.length > 0);
  cindexv = no;
  //  })();
};

setColors();
setColorIndexes();

var restCount = 0;

function Line(vh, x, y, color, r) {
  this.vh = vh;
  this.x = x;
  this.y = y;
  this.color = color;
  if (this.vh == "h") this.color = colors[cindexh[r]];else
  this.color = colors[cindexv[r]];
  this.o = 0;
  this.inc = 0;
  this.r = r;
  this.drawLine = () => {
    ctx.beginPath();
    if (vh == "h") {
      ctx.moveTo(-edge + this.o, this.y);
      ctx.lineTo(edge + this.o, this.y);
    } else {
      ctx.moveTo(this.x, -edge + this.o);
      ctx.lineTo(this.x, edge + this.o);
    }
    ctx.strokeStyle = this.color;
    ctx.stroke();
  };
  this.d = 0;
  this.move = () => {
    if (Math.abs(this.o) > 2 * CSIZE) {
      // make this choice a line property
      if (Math.random() < 0.5) this.o = -this.o;else
      this.inc = -this.inc;
      if (this.vh == "h") this.color = colors[cindexh[this.r]];else
      this.color = colors[cindexv[this.r]];
    }
    if (t > this.d) {
      this.o += this.inc;
      if (this.inc != 0 && Math.abs(this.o) < 0.1) {
        this.inc = 0;
        restCount++;
        this.o = 0;
      }
    }
  };
}

var linesh = (() => {
  let a = [];
  for (let i = 0; i < COUNT / 2 - 1; i++) {
    a.push(new Line("h", 0,.........完整代码请登录后点击上方下载按钮下载查看