html5抽奖转盘生成器

<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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