deepseek灰度测试

代码如下，这是一个在 canvas 上绘制动态心形粒子的交互脚本：

<canvas id=c></canvas>
<script>
(function() {
  let w,h,X,Y,Mx,My,P=[],i,N=450,t=0,c=document.getElementById('c'),C=c.getContext('2d');
  window.onresize=_=>{w=c.width=innerWidth;h=c.height=innerHeight;X=w/2;Y=h/2;Mx=X;My=Y};
  window.onmousemove=e=>{Mx=e.clientX;My=e.clientY};
  onresize();
  for(i=N;i--;)P[i]=[Math.random()*6.28,Math.random()*2-1,Math.random()*9];
  draw=_=>{
    t+=.02;
    C.globalCompositeOperation='source-over';
    C.fillStyle='rgba(0,0,0,.18)';
    C.fillRect(0,0,w,h);
    C.globalCompositeOperation='lighter';
    let cx=X+(Mx-X)*.12, cy=Y+(My-Y)*.12;
    for(i=N;i--;){
      let[a,r,d]=P[i];
      let aa=a+t*r*.35;
      let si=Math.sin(aa);
      let hx=16*si*si*si;
      let hy=13*Math.cos(aa)-5*Math.cos(2*aa)-2*Math.cos(3*aa)-Math.cos(4*aa);
      let sc=6.5+4.5*Math.sin(t*.6+d);
      let px=cx+hx*sc;
      let py=cy-hy*sc+7*Math.sin(t*1.4+d);
      let hue=(a*180/Math.PI+t*90+d*30)%360;
      C.beginPath();
      C.arc(px,py,1.6+Math.sin(t*2.2+d)*.9,0,7);
      C.fillStyle='hsl('+hue+',90%,65%)';
      C.fill();
    }
    requestAnimationFrame(draw);
  }
  draw();
})();
</script>