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html5抽奖转盘生成器

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  • 来源:互联网

<html>
<head>
	<meta http-equiv="content-type" charset="utf-8" content="text/html">
    <title id="title">测试你的弱点</title>
    <style>
		*{
			margin:0;
			padding:0;	
		}
		
		#div1{
			margin:0 auto;
			height:100px;
			width:500px;
			margin-top:10px;
			border-radius:10px;
			background:red;	
			text-align:center;
			margin-bottom:10px;			
		}
		
		#divhead{
			width:100%;
			background:blue;
			height:30%;
			border-radius:10px 10px 0 0;			
			color:white;	
		}
		
		#divbody{
			width:100%;
			height:70%;
			font-size:20px;	
			margin-top:20px;		
		}
		
		#divbody input{
			height:40px;
			line-height:100%;	
		}
		
		#divbody button{
			height:40px;
			width:80px;
		}
	</style>
    <script src="md5.js"></script>
</head>
<body>
	<!--canvas的样式必须写在标签内部,不能写在style-->
	<canvas id="canvas" width="500px" height="500px" style="background:#fff;">您的浏览器不支持canvas标签</canvas>	 
    <div id="div1">  
    	<div id="divhead">
        	<h2>测试你有什么弱点?</h2>
        </div>
        <div id="divbody">
            <b>填写你的姓名:</b>
            <input id="name" type="text" maxlength="4">
            <button onClick="setcircleNum()">开始测试</button>
        </div>
    </div>
	
    <script>											
		//在jquery中不能使用$("#canvas")获取画布对象
		var canvas = document.getElementById("canvas");
		var div = document.getElementById("div1");
		var name = document.getElementById("name");
		var title = document.getElementById("title");
		var cxt = canvas.getContext("2d");
		var text = ["太善良","异性缘好","没有弱点","过于专一","憋尿工夫茶","喜欢卖萌","太招人喜欢","太TM聪明","ggsggggg"];
		var num = text.length;
		var time = -Math.PI/2 + (Math.PI*2/num/2);
		//屏幕宽度
		var clientW = document.body.scrollWidth;		
		//圆心位置
		var center = clientW/2;
		//外部圆半径
		var radiu = center * 0.9;
		//内部圆半径		
		var innerRadiu = radiu*0.2;
		//白线宽度
		var lineWidth = 4;
		//文字大小
		var fontSize = 20 * 8/num;
		//文字最大长度
		var fontMaxLength = radiu * 0.6;
		//选择圈数
		var circleNum = 100;	
		//结果序号
		var resIndex = -1;	
		var clock = null;
			
		construct();
		
		function construct(isfirst){
			canvas.width = clientW;	
			canvas.height = clientW;
			div.style.width = clientW * 0.9;										
			cxt.clearRect(0,0,clientW,clientW);		
			drawbg();						
			darwSector();
			drawWhite()															
			drawHand(time);		
			drawineer();
		}
		
		/*
		*画背景圆
		*/
		function drawbg(){
			startPoint = 0;
			add = Math.PI/3;
			for(var i = 0; i < 6; i++){	
				//画扇形				
				cxt.fillStyle = (i % 2 == 0) ? "#DE5B25" : "#000";			
				cxt.beginPath();											
				cxt.moveTo(center,center);								
				cxt.arc(center,center,radiu,startPoint,startPoint + add,false);		
				cxt.closePath();					
				cxt.fill();	
				
				//画突起
				cxt.fillStyle = (i % 2 == 0) ? "#000":"#DE5B25";
				cxt.save();
				cxt.beginPath();			
				cxt.translate(center,center);				
				cxt.rotate(startPoint);	
				cxt.moveTo(0,radiu*1.1);			
				cxt.lineTo(radiu*0.1,radiu*0.99);
				cxt.lineTo(-radiu*0.1,radiu* 0.99);
				cxt.closePath();					
				cxt.fill();
				cxt.restore();
				
				startPoint = startPoint + add;															
			}			
		}
		/*
		*随机生成颜色
		*/
		function randColor(){			
			var rand1 = Math.round(255*Math.random());
			var rand2 = Math.round(255*Math.random());
			var rand3 = Math.round(255*Math.random());
			return "rgba("+rand1+","+rand2+","+rand3+","+1+")";				
		}
			
		/*
		*以水平向右为起边,顺时针画扇形
		*/
		function darwSector(){
			var startPoint = 0;
			var add = Math.PI * 2/ num;
			for(var i = 0; i < num; i++){	
				//画扇形				
				cxt.fillStyle = "#abcdef";			
				cxt.beginPath();											
				cxt.moveTo(center,center);								
				cxt.arc(center,center,radiu*0.9,startPoint,startPoint + add,false);		
				cxt.closePath();					
				cxt.fill();							
				
				//画分割线
				cxt.save();
				cxt.beginPath();					
				cxt.translate(center,center);	
				cxt.moveTo(0,0);
				cxt.lineWidth = lineWidth;
				cxt.strokeStyle = "rgb(250,250,250)";	
				cxt.rotate(startPoint + add);
				cxt.lineTo(radiu*0.9,0);					
				cxt.closePath();
				cxt.stroke();	
				cxt.restore();	
				startPoint = startPoint + add;															
			}
			//写文字
			startPoint = 0;
			for(var i = 0; i < num; i++){
				var txt = text[i];				
				cxt.save();		
				cxt.beginPath();	
				cxt.textBaseline = "middle";
				cxt.translate(center,center);
				cxt.fillStyle = randColor();
				cxt.font = fontSize+"px Arial bolder";				
				cxt.rotate(startPoint + add/2);
				cxt.fillText(txt,innerRadiu * 1.5, 0,fontMaxLength);				
				cxt.closePath();
				cxt.restore();				
				startPoint = startPoint + add;	
			}		
		}
			
		/*
		*画中间空白圆形
		*/	
		function drawWhite(){
			//画内部白色圆
			cxt.fillStyle = "#fff";		
			cxt.beginPath();	
			cxt.moveTo(center,center);	
			cxt.arc(center,center,innerRadiu,0,Math.PI*2,false);		
			cxt.closePath();					
			cxt.fill();	
		}
				
		/*
		*画中间圆形
		*/
		function drawineer(){						
			//画内部蓝色圆
			cxt.fillStyle = "blue";		
			cxt.beginPath();	
			cxt.moveTo(center,center);	
			cxt.arc(center,center,innerRadiu/2,0,Math.PI*2,false);		
			cxt.closePath();					
			cxt.fill();	
			
			//画橙色圈
			cxt.fillStyle = "#CC0000";		
			cxt.beginPath();	
			cxt.moveTo(center,center);	
			cxt.arc(center,center,innerRadiu * 0.5 *0.8,0,Math.PI*2,false);		
			cxt.closePath();					
			cxt.fill();	
			
			//画黄色圈
			cxt.fillStyle = "#FFCC00";		
			cxt.beginPath();	
			cxt.moveTo(center,center);	
			cxt.arc(center,center,innerRadiu * 0.5 *0.75,0,Math.PI*2,false);		
			cxt.closePath();					
			cxt.fill();								
		}
		
		/*
		*画出指针
		*/
		function drawHand(angle){
			cxt.save();
			cxt.fillStyle = "blue";		
			cxt.beginPath();			
			cxt.translate(center,center);				
			cxt.rotate(angle);	
			cxt.moveTo(0,innerRadiu*1.1);			
			cxt.lineTo(5,0);
			cxt.lineTo(-5,0);
			cxt.closePath();					
			cxt.fill();
			cxt.restore();
						
			time = time+ Math.PI*2/num;	
			if(resIndex != num-1){
				resIndex++;
			}else{
				resIndex = 0;				
			}			
			if(time > 2* Math.PI / num * circleNum) stopHand();								
		}
		
		//停止旋转
		function stopHand(){
			clearInterval(clock);			
			title.innerHTML = "\""+name.value+"\"的弱点是"+text[resIndex+1];
			alert("\""+name.value+"\"的弱点是"+text[resIndex+1]);
		}
		
		//开始旋转
		function startHand(){
			title.innerHTML = "测试你的弱点";
			clock = setInterval(construct,100);	
			time = Math.PI/num;
			resIndex = 0;
		}
		
		/*
		*根据名字设置旋转次数
		*/
		function setcircleNum(){			
			var str = name.value.toString();
			if(null == str || "" == str){
				return 0;	
			}
			
			if(isNaN(parseInt(hex_md5(str)))){
				circleNum = 50;	
			}else{
				circleNum = parseInt(hex_md5(str)) % num + 50;				
			}
										
			if(null != clock){
				clearInterval(clock);				
			}
			startHand();
		}
	</script>
</body>
</html>



下面是md5.js

/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/*
 * Configurable variables. You may need to tweak these to be compatible with
 * the server-side, but the defaults work in most cases.
 */
var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

/*
 * These are the functions you'll usually want to call
 * They take string arguments and return either hex or base-64 encoded strings
 */
function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }

/*
 * Perform a simple self-test to see if the VM is working
 */
function md5_vm_test()
{
  return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
}

/*
 * Calculate the MD5 of an array of little-endian words, and a bit length
 */
function core_md5(x, len)
{
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);
  }
  return Array(a, b, c, d);

}

/*
 * These functions implement the four basic operations the algorithm uses.
 */
function md5_cmn(q, a, b, x, s, t)
{
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{
  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}

/*
 * Calculate the HMAC-MD5, of a key and some data
 */
function core_hmac_md5(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md5(opad.concat(hash), 512 + 128);
}

/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters.
 */
function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

/*
 * Bitwise rotate a 32-bit number to the left.
 */
function bit_rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

/*
 * Convert a string to an array of little-endian words
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
 */
function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

/*
 * Convert an array of little-endian words to a string
 */
function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

/*
 * Convert an array of little-endian words to a hex string.
 */
function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

/*
 * Convert an array of little-endian words to a base-64 string
 */
function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}


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