- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <title> Rose </title>
- <meta name="Generator" content="EditPlus">
- <meta name="Author" content="">
- <meta name="Keywords" content="">
- <meta name="Description" content="">
- <meta charset="utf-8">
- <style type="text/css">
- #main { position:absolute; top: 50%; left: 50%; }
- #content { position: absolute; top: -50%; margin: -110px -280px; width: 560px; background:#FFF; border: solid 1px #000; text-align: center; }
- </style>
- </head>
- <body><div id="demo" style="width:520px; height:500px;margin: 20px auto auto auto;"><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><br /><br />
- </body>
- </html>
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发表于 2017-2-14 14:18:28
楼主