canvas彩色粒子转圈动画效果代码-html代码-BFW代码库

canvas彩色粒子转圈动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas彩色粒子转圈动画效果代码

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";
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 = c.height = 2 * CSIZE;
  d.append(c);
  return c.getContext("2d");
})();
ctx.translate(CSIZE, CSIZE);
ctx.rotate(TP / 4);


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

const 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;
  }
};

function start() {
  if (stopped) {
    requestAnimationFrame(animate);
    stopped = false;
  } else {
    stopped = true;
  }
}
ctx.canvas.addEventListener("click", start, false);

var dashLength = 10;
var rotOff = TP / 4;
var stopped = true;
var t = -200;
function animate(ts) {
  if (stopped) return;
  t++;
  if (t % 300 == 0) {
    if (t % 1200 == 0) t = 0;
    reset();
  }
  a = TP * t / 1200;
  if (t % 40 == 0) huex++;
  for (let i = 0; i < circles.length; i++) {
    let hue = (huex + Math.round(circles[i].hDiff * Math.pow(Math.sin(2 * a), 2))) % 360;
    circles[i].col = "hsl(" + hue + ",100%,50%)";
  }
  draw();
  requestAnimationFrame(animate);
}

const radius = 25;

var circles = [];
var cia = [];
var Circle = function (x) {
  this.x = x;
  this.dmx = new DOMMatrix([1, 0, 0, 1, x, 0]);
  this.dmx2 = false;
  this.col = "hsl(" + huex + ",100%,50%)";
  this.sf = 1;
  this.hDiff = 80;
};

var huex = getRandomInt(0, 360);
let wColor = "hsl(" + huex + ",100%,50%)";

for (let i = 0; i < 2 * CSIZE / radius - 1; i++) {
  circles.push(new Circle(-CSIZE + radius + i * radius));
  cia.push(i);
}

var rots = [8, 10, 12, 14, 16, 18, 20, 22, -6, -10, -12, -14, -16, -18, 20, 22];
var sf = [-1, 1][getRandomInt(0, 2)];

var a = 0;
let cc = 0;

var createCognates = (i1, i2) => {
  let mp = (circles[i1].x + circles[i2].x) / 2;
  circles[i1].dmx.e = mp;
  circles[i1].dmx2 = new DOMMatrix([1, 0, 0, 1, (i1 - i2) * radius / 2, 0]);
  circles[i2].dmx.e = mp;
  circles[i2].dmx2 = new DOMMatrix([1, 0, 0, 1, (i2 - i1) * radius / 2, 0]);
  let rr = Math.abs(circles[i1].x - circles[i2].x);
  if (rr > 300) circles[i1].sf = [-2, 2][getRandomInt(0, 2)];else
  if (rr > 200) circles[i1].sf.........完整代码请登录后点击上方下载按钮下载查看