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Share using HTML5 to realize a 3D realistic Christmas tree

零下一度Original: 2017-05-01 10:30:4434960browse

The following code only runs in browsers that support HTML5! ! 3D realistic Christmas tree effect written in html5

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "/TR/html4/frameset.dtd">
<html>
<head>
<title>html5写的3D逼真圣诞树效果</title>
<meta charset="utf-8" >
<style>
html, body { width: 100%; height: 100%; margin: 0; padding: 0; border: 0; }
p { margin: 0; padding: 0; border: 0; }
.nav { 
		position: absolute; 
		top: 0; 
				left: 0; 
				width: 100%; 
				height: 27px; 
				background-color: white; 
				color: black; 
				text-align: center; 
				line-height: 25px;
			}

			a { color: black; text-decoration: none; border-bottom: 1px dashed black; }
			a:hover { border-bottom: 1px solid red; }

			.previous { float: left; margin-left: 10px; }
			.next { float: right; margin-right: 10px; }
			
			.green { color: green; }
			.red { color: red; }

			textarea { width: 100%; height: 100%; border: 0; padding: 0; margin: 0; padding-bottom: 20px; }
			.block-outer { float: left; width: 22%; height: 100%; padding: 5px; border-left: 1px solid black; margin: 30px 3px 3px 3px; }
			.block-inner { height: 68%; }
			.one { border: 0; }
</style>
	</head>
	<body marginwidth="0" marginheight="0">
	<canvas id="c" height="356" width="446">
<script>
			var collapsed = true;
			function toggle() {
				var fs = top.document.getElementsByTagName(&#39;frameset&#39;)[0];
				var f = fs.getElementsByTagName(&#39;frame&#39;);
				if (collapsed) {
					fs.rows = &#39;250px,*&#39;;
					// enable resizing of frames in firefox/opera
					fs.noResize = false;
					f[0].noResize = false;
					f[1].noResize = false;
				} else {
					fs.rows = &#39;30px,*&#39;;
					// disable resizing of frames in firefox/opera
					fs.noResize = true;
					f[0].noResize = true;
					f[1].noResize = true;
				}
				collapsed = !collapsed;
			}

</script>
<script>
			var b = document.body;
			var c = document.getElementsByTagName(&#39;canvas&#39;)[0];
			var a = c.getContext(&#39;2d&#39;);
			document.body.clientWidth; // fix bug in chrome.
</script>
<script>
// start of submission //
M=Math;Q=M.random;J=[];U=16;T=M.sin;E=M.sqrt;for(O=k=0;x=z=j=i=k<200;)with(M[k]=k?c.cloneNode(0):c){width=height=k?32:W=446;with(getContext(&#39;2d&#39;))if(k>10|!k)for(font=&#39;60px Impact&#39;,V=&#39;rgba(&#39;;I=i*U,fillStyle=k?k==13?V+&#39;205,205,215,.15)&#39;:V+(147+I)+&#39;,&#39;+(k%2?128+I:0)+&#39;,&#39;+I+&#39;,.5)&#39;:&#39;#cca&#39;,i<7;)beginPath(fill(arc(U-i/3,24-i/2,k==13?4-(i++)/2:8-i++,0,M.PI*2,1)));else for(;x=T(i),y=Q()*2-1,D=x*x+y*y,B=E(D-x/.9-1.5*y+1),R=67*(B+1)*(L=k/9+.8)>>1,i++<W;)if(D<1)beginPath(strokeStyle=V+R+&#39;,&#39;+(R+B*L>>0)+&#39;,40,.1)&#39;),moveTo(U+x*8,U+y*8),lineTo(U+x*U,U+y*U),stroke();for(y=H=k+E(k++)*25,R=Q()*W;P=3,j<H;)J[O++]=[x+=T(R)*P+Q()*6-3,y+=Q()*U-8,z+=T(R-11)*P+Q()*6-3,j/H*20+((j+=U)>H&Q()>.8?Q(P=9)*4:0)>>1]}setInterval(function G(m,l){A=T(D-11);if(l)return(m[2]-l[2])*A+(l[0]-m[0])*T(D);a.clearRect(0,0,W,W);J.sort(G);for(i=0;L=J[i++];a.drawImage(M[L[3]+1],207+L[0]*A+L[2]*T(D)>>0,L[1]>>1)){if(i==2e3)a.fillText(&#39;Merry Christmas!&#39;,U,345);if(!(i%7))a.drawImage(M[13],((157*(i*i)+T(D*5+i*i)*5)%W)>>0,((113*i+(D*i)/60)%(290+i/99))>>0);}D+=.02},1)
// end of submission //
</script>
</body>
</html>

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