canvas实现宇宙星尘尘埃行星旋转动画效果代码-html代码-BFW代码库

canvas实现宇宙星尘尘埃行星旋转动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现宇宙星尘尘埃行星旋转动画效果代码

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="zh-CN">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <title>全屏 宇宙 星尘（Canvas）</title>
  <style>
    html,body{height:100%;margin:0;background:#02020b;overflow:hidden}
    canvas{display:block; width:100vw; height:100vh; background: radial-gradient(ellipse at 50% 40%, #05040a 0%, #02020b 40%, #000 100%);}
    /* small credit text (optional) */
    .credit{
      position:fixed;right:12px;bottom:8px;color:rgba(255,255,255,0.18);font-family:Inter, system-ui, -apple-system; font-size:12px;pointer-events:none;
      text-shadow:0 1px 6px rgba(0,0,0,0.6)
    }
  </style>
</head>
<body>
  <canvas id="c"></canvas>
  <div class="credit">宇宙星尘 · 缓慢旋转</div>

  <script>
  (function(){
    const canvas = document.getElementById('c');
    const ctx = canvas.getContext('2d', { alpha: true });
    let W = window.innerWidth, H = window.innerHeight;
    let DPR = Math.max(1, window.devicePixelRatio || 1);
    let cx = W/2, cy = H/2;
    let maxRadius = Math.min(W, H) * 0.48;
    let particles = [];
    let farStars = [];
    let ROT_SPEED = 0.000008; // rad per ms, very slow
    let arms = 4;
    let particleCount = Math.max(900, Math.min(5000, Math.floor((W*H)/800)));
    const reduceMotion = window.matchMedia && window.matchMedia('(prefers-reduced-motion: reduce)').matches;

    // Utility: hex <-> rgb, lerp
    function hexToRgb(h){
      h = h.replace('#','');
      return { r: parseInt(h.substring(0,2),16), g: parseInt(h..........完整代码请登录后点击上方下载按钮下载查看