七夕情人节特献3D玫瑰花源码

2015/05/24 37578
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  <title>3D玫瑰花-同穷论坛</title>
  <meta name="Generator" content="EditPlus">
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 情人节快到了，这里送大家一枝玫瑰，无论是有对象还是没对象的朋友们，情人节快乐～

下面的玫瑰绘制用到了HTML 5的canvas，所以你的浏览器需要支持HTML 5。个人还是比较推荐chrome，这个效果在Firefox下也会稍卡。
<div id="demo" style="width:520; height:500px;"><canvas id="c" height="500" width="500"></canvas></div>
<script> 
	var b = document.body;
	var c = document.getElementsByTagName('canvas')[0];
	var a = c.getContext('2d');
	var canvas = document.getElementsByTagName('canvas')[0];
	var ctx = canvas.getContext('2d');
	document.body.clientWidth; 

	with(m=Math)C=cos,S=sin,P=pow,R=random;
	c.width=c.height=f=500;h=-250;
	function p(a,b,c){
		if(c>60)
			return[S(a*7)*(13+5/(.2+P(b*4,4)))-S(b)*50,b*f+50,625+C(a*7)*(13+5/(.2+P(b*4,4)))+b*400,a*1-b/2,a];
		A=a*2-1;
		B=b*2-1;
		if(A*A+B*B<1)
		{
			if(c>37)
			{
				n=(j=c&1)?6:4;o=.5/(a+.01)+C(b*125)*3-a*300;
				w=b*h;
				return[o*C(n)+w*S(n)+j*610-390,o*S(n)-w*C(n)+550-j*350,1180+C(B+A)*99-j*300,.4-a*.1+P(1-B*B,-h*6)*.15-a*b*.4+C(a+b)/5+P(C((o*(a+1)+(B>0?w:-w))/25),30)*.1*(1-B*B),o/1e3+.7-o*w*3e-6]
			}
			if(c>32)
			{
				c=c*1.16-.15;o=a*45-20;w=b*b*h;z=o*S(c)+w*C(c)+620;
				return[o*C(c)-w*S(c),28+C(B*.5)*99-b*b*b*60-z/2-h,z,(b*b*.3+P((1-(A*A)),7)*.15+.3)*b,b*.7]
			}
			o=A*(2-b)*(80-c*2);
			w=99-C(A)*120-C(b)*(-h-c*4.9)+C(P(1-b,7))*50+c*2;z=o*S(c)+w*C(c)+700;
			return[o*C(c)-w*S(c),B*99-C(P(b, 7))*50-c/3-z/1.35+450,z,(1-b/1.2)*.9+a*.1, P((1-b),20)/4+.05]
		}
	}
	var draw = setInterval('for(i=0;i<1e4;i++)if(s=p(R(),R(),i%46/.74)){z=s[2];x=~~(s[0]*f/z-h);y=~~(s[1]*f/z-h);if(!m[q=y*f+x]|m[q]>z)m[q]=z,a.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")",a.fillRect(x,y,1,1)}',0);
	
	var demo = document.getElementById('demo');
	function redraw(){
		/*
		var d_c = document.createElement("canvas");
		d_c.setAttribute("id","c");
		d_c.setAttribute("width","520");
		d_c.setAttribute("height","500");
		demo.appendChild(d_c);
		*/
		draw = setInterval('for(i=0;i<1e4;i++)if(s=p(R(),R(),i%46/.74)){z=s[2];x=~~(s[0]*f/z-h);y=~~(s[1]*f/z-h);if(!m[q=y*f+x]|m[q]>z)m[q]=z,a.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")",a.fillRect(x,y,1,1)}',0);
		//alert(d_c);
	}
	
	function clear_canvas()
	{
		ctx.clearRect(0,0,520,500);
		//canvas.parentNode.removeChild(canvas);   //删除
	}
	
	function stop_draw(obj){
		clearInterval(obj);
	}

</script>

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代码片段
