var locations; var keys = [ "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" ]; // 不同的数字对于不同的颜色, // colors是颜色的数组 var colors = [ "#FFF", "PINK", "GRAY", "#ABCDEF", "#0FF0FF", "#FF0", "#CDF0AB", "#FEDCBA", "#F0F", "#BBBBBB", "#00F", "#00FF00" ]; var score;// 总分数 var max;// 最大数 var time;// 计时 var t; // // $(function() { // init(); // }); // 初始化 function init() { t = setInterval(showtime, 1000); score = 0; max = 0; time = 0; locations = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]; locations[Location()] = FixedNum(); locations[Location()] = FixedNum(); paint(); // 按键控制方向 window.onkeydown = function(e) { var keyCode; if (!e) e = window.event; if (document.all) { keyCode = e.keyCode; } else { keyCode = e.which; } // ← 或 A if (keyCode == 37 || keyCode == 65) { $("#keys").text("←"); toLeft(); isEnd(); } // ↑ 或 W if (keyCode == 38 || keyCode == 87) { $("#keys").text("↑"); toUp(); isEnd(); } // → 或 D if (keyCode == 39 || keyCode == 68) { $("#keys").text("→"); toRight(); isEnd(); } // ↓ 或 S if (keyCode == 40 || keyCode == 83) { $("#keys").text("↓"); toDown(); isEnd(); } }; } function isEnd() { var f = false; // 判断是否结束 if (locations.indexOf(0) == -1) {// 如果数组中不包含0 // 判断相邻的数是否为相等 // alert("注意了哦~"); $("#danger").text("注意了哦~"); // if(isEndX()){ if (isEndX() && isEndY()) { clearTimeout(t); if (window.confirm("结束了!\n当前分数: " + score + ";\n用时: " + time + "S;\n最大数是: " + max + "。\n是否开始新的游戏?")) { init(); } else { window.close(); } } } else { $("#danger").text(""); } return f; } function isEndX() { // 判断横向的数组 // 如果相邻位置的数不相同,就结束 var f = false; var w = new Array(); for (var j = 0; j < 4; j++) { for (var i = 0; i < 4; i++) { w[i] = locations[4 * j + i]; } // alert(w); f = (w[0] != w[1] && w[1] != w[2] && w[2] != w[3]);// 如果为真,表示相邻的两个数不相等 if (!f) { break; } } return f; } function isEndY() { // 判断纵向的数组 // 如果相邻位置的数不相同,就结束 var f = false; var w = new Array(); for (var j = 0; j < 4; j++) { for (var i = 0; i < 4; i++) { w[i] = locations[4 * i + j]; } // alert(w); f = (w[0] != w[1] && w[1] != w[2] && w[2] != w[3]);// 如果为真,表示相邻的两个数不相等 if (!f) { break; } } return f; } function toDown() { // 向下 for (var i = 0; i < 4; i++) { // 判断每一行 var row = [ locations[i + 12], locations[i + 8], locations[i + 4], locations[i] ]; configurationD(i, row); } locations[Location()] = FixedNum(); paint(); } function toRight() { // 向右 for (var i = 0; i < 4; i++) { // 判断每一行 var row = [ locations[i * 4 + 3], locations[i * 4 + 2], locations[i * 4 + 1], locations[i * 4] ]; // alert(i+"\t"+row); configurationR(i, row); } locations[Location()] = FixedNum(); paint(); } function toLeft() { // 向左 for (var i = 0; i < 4; i++) { // 判断每一行 var row = [ locations[i * 4], locations[i * 4 + 1], locations[i * 4 + 2], locations[i * 4 + 3] ]; configurationL(i, row); } locations[Location()] = FixedNum(); paint(); } function toUp() { // 向上 for (var i = 0; i < 4; i++) { var row = [ locations[i + 0], locations[i + 4], locations[i + 8], locations[i + 12] ]; configurationU(i, row); } locations[Location()] = FixedNum(); paint(); } function configurationD(i, r) { makeArray(r); for (var j = 0; j < 4; j++) { locations[4 * (3 - j) + i] = r[j]; } } function configurationR(i, r) { // 向右 makeArray(r); for (var j = 0; j < 4; j++) { locations[3 + 4 * i - j] = r[j]; } } function configurationU(i, r) { makeArray(r); for (var j = 0; j < 4; j++) { locations[4 * j + i] = r[j]; } } function configurationL(i, r) { makeArray(r); for (var j = 0; j < 4; j++) { locations[4 * i + j] = r[j]; } } function makeArray(r) { if (!isZero(r)) { // 把数组中是0往后移动 for (var m = 0; m < 4; m++) { for (var n = 0; n < 3; n++) { if (r[n] == 0) { r[n] = r[n + 1]; r[n + 1] = 0; } } } } for (var m = 0; m < 3; m++) { if (r[m] == r[m + 1]) { var k = m; r[k] += r[k + 1]; score += r[k]; while (++k < 3) { r[k] = r[k + 1]; } r[3] = 0; } } return r; } // 绘制点的位置 function paint() { for (var i = 0; i < 16; i++) { $("#box" + keys[i]).text((locations[i] == 0) ? "" : locations[i]); var index = (locations[i] == 0) ? 0 : (locations[i].toString(2).length - 1); $("#box" + keys[i]).css("background", colors[index]); // 选出最大数 if (locations[i] > max) { max = locations[i]; } } $("#score").text("总分为 : " + score); $("#max").text("当前最大数 : " + max); } // 随机生成两个数 function FixedNum() { // 生成2/4; // 生成2的概率是0.8 return Math.random() < 0.8 ? 2 : 4; } // 生成位置 function Location() { // 在空位置中随机生成 var num = Math.floor(Math.random() * 16); // 如果该位置有值,就返回重新生成 while (locations[num] != 0) { num = Math.floor(Math.random() * 16); } return num; } function isZero(m) { return m[0] == 0 && m[1] == 0 && m[2] == 0 && m[3] == 0; } // 计时 function showtime() { $("#time").text("当前用时 :" + (++time) + " s。"); }