canvas实现宇宙星空粒子旋转动画效果代码-html代码-BFW代码库

canvas实现宇宙星空粒子旋转动画效果代码

代码语言：html

所属分类：粒子

代码描述：canvas实现宇宙星空粒子旋转动画效果代码

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">

 <style>
     body {
  background: #060e1b;
  overflow: hidden;
}
 </style>

</head>
<body>
<!-- partial:index.partial.html -->
<canvas id="canvas"></canvas>
<!-- partial -->
  <script >
      "use strict";

var canvas = document.getElementById('canvas'),
  ctx = canvas.getContext('2d'),
  w = canvas.width = window.innerWidth,
  h = canvas.height = window.innerHeight,
    
  hue = 217,
  stars = [],
  count = 0,
  maxStars = 1400;

// Cache gradient
var canvas2 = document.createElement('canvas'),
    ctx2 = canvas2.getContext('2d');
    canvas2.width = 100;
    canvas2.height = 100;
var half = canvas2.width/2,
    gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
    gradient2.addColorStop(0.025, '#fff');
    gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
    gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
    gradient2.addColorStop(1, 'transparent');

    ctx2.fillStyle = gradient2;
    ctx2.beginPath();
    ctx2.arc(half, half, half, 0, Math.PI * 2);
    ctx2.fill();

// End cache

function random(min, max) {
  if (arguments.length < 2) {
    max = min;
    min = 0;
  }
  
  if (min > max) {
    var hold = max;
    max = min;
    min = hold;
  }

  return Math.floor(Math.random() * .........完整代码请登录后点击上方下载按钮下载查看