js实现游戏转盘抽奖

<!DOCTYPE html>

<html>

<head>

    <title>js抽奖</title>

    <meta charset="utf-8">

    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1.0 ,user-scalable=no">

    <style type="text/css">

        td {

            width: 50px;

            height: 50px;

            border: 3px solid #ccc;

            text-align: center;

            vertical-align: middle

        }

    </style>

</head>

<body>

<table id="tb">

    <tr>

        <td>1</td>

        <td>2</td>

        <td>3</td>

        <td>4</td>

        <td>5</td>

    </tr>

    <tr>

        <td>16</td>

        <td></td>

        <td></td>

        <td></td>

        <td>6</td>

    </tr>

    <tr>

        <td>15</td>

        <td></td>

        <td></td>

        <td></td>

        <td>7</td>

    </tr>

    <tr>

        <td>14</td>

        <td></td>

        <td></td>

        <td></td>

        <td>8</td>

    </tr>

    <tr>

        <td>13</td>

        <td>12</td>

        <td>11</td>

        <td>10</td>

        <td>9</td>

    </tr>

</table>

<p></p>

请输入1-16其中一位整数，代表要停止的位置

<input id="txtnum" value="12" type="text"/>

<input type="button" value="开始" onclick="StartGame()"/>

<script type="text/javascript">

    /*

    * 删除左右两端的空格

    */

    function Trim(str) {

        return str.replace(/(^\s*)|(\s*$)/g, "");

    }

    /*

     * 定义数组

     */

    function GetSide(m, n) {

        //初始化数组

        var arr = [];

        for (var i = 0; i < m; i++) {

            arr.push([]);

            for (var j = 0; j < n; j++) {

                arr[i][j] = i * n + j;

            }

        }

        //获取数组最外圈

        var resultArr = [];

        var tempX = 0,

            tempY = 0,

            direction = "Along",

            count = 0;

        while (tempX >= 0 && tempX < n && tempY >= 0 && tempY < m && count < m * n) {

            count++;

            resultArr.push([tempY, tempX]);

            if (direction == "Along") {

                if (tempX == n - 1)

                    tempY++;

                else

                    tempX++;

                if (tempX == n - 1 && tempY == m - 1)

                    direction = "Inverse"

            }

            else {

                if (tempX == 0)

                    tempY--;

                else

                    tempX--;

                if (tempX == 0 && tempY == 0)

                    break;

            }

        }

        return resultArr;

    }

    var index = 0,   //当前亮区位置

        prevIndex = 0,   //前一位置

        Speed = 300,   //初始速度

        Time,   //定义对象

        arr = GetSide(5, 5),   //初始化数组

        EndIndex = 0,   //决定在哪一格变慢

        tb = document.getElementById("tb"),  //获取tb对象

        cycle = 0,   //转动圈数

        EndCycle = 0,   //计算圈数

        flag = false,   //结束转动标志

        quick = 0;   //加速

    function StartGame() {

        cycle = 0;

        flag = false;

        EndIndex = Math.floor(Math.random() * 16);

        //EndCycle=Math.floor(Math.random()*4);

        EndCycle = 1;

        Time = setInterval(Star, Speed);

    }

    function Star() {

        //跑马灯变速

        if (flag == false) {

            //走五格开始加速

            if (quick == 5) {

                clearInterval(Time);

                Speed = 50;

                Time = setInterval(Star, Speed);

            }

            //跑N圈减速

            if (cycle == EndCycle + 1 && index == EndIndex) {

                clearInterval(Time);

                Speed = 300;

                flag = true;   //触发结束

                Time = setInterval(Star, Speed);

            }

        }

        if (index >= arr.length) {

            index = 0;

            cycle++;

        }

        //结束转动并选中号码

        if (flag == true && index == parseInt(Trim(document.getElementById("txtnum").value)) - 1) {

            quick = 0;

            clearInterval(Time);

        }

        tb.rows[arr[index][0]].cells[arr[index][1]].style.border = "3px solid red";

        if (index > 0)

            prevIndex = index - 1;

        else {

            prevIndex = arr.length - 1;

        }

        tb.rows[arr[prevIndex][0]].cells[arr[prevIndex][1]].style.border = "3px solid #ccc";

        index++;

        quick++;

    }

    /*

    window.onload=function(){

     Time = setInterval(Star,Speed);

    }

    */

</script>

</body>

</html>
js实现游戏转盘抽奖-LMLPHP
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js实现游戏转盘抽奖-LMLPHP