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墨香年少

css绿色背景

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1.png

 

html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
    .tgme_background_wrap{position:fixed;left:0;top:0;width:100%;height:100%;pointer-events:none;z-index:-1;}.tgme_background{position:absolute;left:0;top:0;width:100%;height:100%;}.tgme_background_pattern.default{opacity:0.3;background-image:url(pattern.svg);}.tgme_background_pattern{position:absolute;left:0;top:0;width:100%;height:100%;mix-blend-mode:overlay;background:center repeat;background-size:contain;}
    </style>
</head>
<body>
<div class="tgme_background_wrap">
    <canvas id="tgme_background" class="tgme_background default" width="50" height="50" data-colors="dbddbb,6ba587,d5d88d,88b884"></canvas>
    <div class="tgme_background_pattern default"></div>
  </div>
  <script>
  var TWallpaper=function(){function x(a){for(var b=[].concat(G);0<a;)b.push(b.shift()),a--;a=[];for(var c=0;c<b.length;c+=2)a.push(b[c]);return a}function B(a,b){b%=90;var c=x(a%p);if(b){var d=x(++a%p);return[{x:c[0].x+(d[0].x-c[0].x)/90*b,y:c[0].y+(d[0].y-c[0].y)/90*b},{x:c[1].x+(d[1].x-c[1].x)/90*b,y:c[1].y+(d[1].y-c[1].y)/90*b},{x:c[2].x+(d[2].x-c[2].x)/90*b,y:c[2].y+(d[2].y-c[2].y)/90*b},{x:c[3].x+(d[3].x-c[3].x)/90*b,y:c[3].y+(d[3].y-c[3].y)/90*b}]}return c}function H(a){for(l+=a;90<=l;)l-=90,g++,g>=p&&(g-=p);for(;0>l;)l+=90,g--,0>g&&(g+=p)}function I(a){C+=a.deltaY;D||(requestAnimationFrame(P),D=!0)}function P(){var a=C/50;C%=50;if(a=0<a?Math.floor(a):Math.ceil(a))H(a),a=B(g,l),y(z(a));D=!1}function Q(){if(0<A.length){var a=A.shift();y(a)}else clearInterval(E)}function z(a){for(var b=f._hctx.createImageData(50,50),c=b.data,d=0,q=0;50>q;q++)for(var h=q/50-.5,F=h*h,v=0;50>v;v++){var m=v/50-.5,e=.35*Math.sqrt(m*m+F);e=e*e*6.4;var r=Math.sin(e),w=Math.cos(e);e=Math.max(0,Math.min(1,.5+m*w-h*r));m=Math.max(0,Math.min(1,.5+m*r+h*w));for(var J=w=r=0,K=0,t=0;t<u.length;t++){var k=e-a[t].x,L=m-a[t].y;k=Math.max(0,.9-Math.sqrt(k*k+L*L));k*=k*k*k;r+=k;w+=k*u[t].r/255;J+=k*u[t].g/255;K+=k*u[t].b/255}c[d++]=w/r*255;c[d++]=J/r*255;c[d++]=K/r*255;c[d++]=255}return b}function y(a){f._hctx.putImageData(a,0,0);f._ctx.drawImage(f._hc,0,0,50,50)}function M(){var a=+Date.now();!document.hasFocus()||a-N<R||(N=a,H(1),a=B(g,l),y(z(a)));O=requestAnimationFrame(M)}var g=0,l=0,N=0,R=1E3/15,A=[],E=null,O=null,u=[],n=[0,.25,.5,.75,1,1.5,2,2.5,3,3.5,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,18.3,18.6,18.9,19.2,19.5,19.8,20.1,20.4,20.7,21,21.3,21.6,21.9,22.2,22.5,22.8,23.1,23.4,23.7,24,24.3,24.6,24.9,25.2,25.5,25.8,26.1,26.3,26.4,26.5,26.6,26.7,26.8,26.9,27],G=[{x:.8,y:.1},{x:.6,y:.2},{x:.35,y:.25},{x:.25,y:.6},{x:.2,y:.9},{x:.4,y:.8},{x:.65,y:.75},{x:.75,y:.4}],p=G.length,D=!1,C=0,f={init:function(a){u=[];var b=a.getAttribute("data-colors")||"";b&&(b=b.split(","));for(var c=0;c<b.length;c++){var d=u,q=d.push;var h=(h=/^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(b[c]))?{r:parseInt(h[1],16),g:parseInt(h[2],16),b:parseInt(h[3],16)}:null;q.call(d,h)}f._hc||(f._hc=document.createElement("canvas"),f._hc.width=50,f._hc.height=50,f._hctx=f._hc.getContext("2d"));f._canvas=a;f._ctx=f._canvas.getContext("2d");f.update()},update:function(){var a=B(g,l);y(z(a))},toNextPosition:function(){clearInterval(E);A=[];var a=x(g%p);g++;var b=x(g%p),c=(b[0].x-a[0].x)/27,d=(b[0].y-a[0].y)/27,q=(b[1].x-a[1].x)/27,h=(b[1].y-a[1].y)/27,F=(b[2].x-a[2].x)/27,v=(b[2].y-a[2].y)/27,m=(b[3].x-a[3].x)/27;b=(b[3].y-a[3].y)/27;for(var e=0;60>e;e++)A.push(z([{x:a[0].x+c*n[e],y:a[0].y+d*n[e]},{x:a[1].x+q*n[e],y:a[1].y+h*n[e]},{x:a[2].x+F*n[e],y:a[2].y+v*n[e]},{x:a[3].x+m*n[e],y:a[3].y+b*n[e]}]));E=setInterval(Q,1E3/30)},animate:function(a){a?M():cancelAnimationFrame(O)},scrollAnimate:function(a){a?document.addEventListener("wheel",I):document.removeEventListener("wheel",I)}};return f}();
  
  var tme_bg = document.getElementById('tgme_background');
    if (tme_bg) {
      TWallpaper.init(tme_bg);
      TWallpaper.animate(true);
      window.onfocus = function(){ TWallpaper.update(); };
    }
  </script>
</body>
</html>
  

 


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