// 障礙物基類對(duì)象，繼承自TankObject
 Barrier = function () {
     this.DefenVal = 1;  // 防御力
     this.CanBeAttacked = true;  // 是否可以被攻擊
 }
 Barrier.prototype = new TankObject();
 // 墻
 WallB = function () { }
 WallB.prototype = new Barrier();
 // 空地
 EmptyB = function () {
     this.CanAcross = true;  // 可被穿過
 }
 EmptyB.prototype = new Barrier();
 // 河流
 RiverB = function () {
     this.DefenVal = 0;
     this.CanBeAttacked = false; // 優(yōu)先取對(duì)象的成員，繼承自父類的會(huì)被覆蓋。
 }
 RiverB.prototype = new Barrier();
 // 鋼
 SteelB = function () {
     this.DefenVal = 3;
 }
 SteelB.prototype = new Barrier();
 // 草叢對(duì)象
 TodB = function () {
     this.CanBeAttacked = false;
     this.DefenVal = 0;
     this.CanAcross = true;
 }
 TodB.prototype = new Barrier();
 // 總部
 PodiumB = function () {
     this.DefenVal = 5;
 }
 PodiumB.prototype = new Barrier();

 //地圖元素類型枚舉
 /*
 0：空地   
 1：墻   
 2：鋼   
 3：樹叢       
 4：河       
 5：總部   
 */
 var EnumMapCellType = {
     Empty: "0"
     , Wall: "1"
     , Steel: "2"
     , Tod: "3"
     , River: "4"
     , Podium: "5"
 };
 // 每個(gè)地形對(duì)應(yīng)的樣式名稱
 var ArrayCss = ['empty', 'wall', 'steel', 'tod', 'river', 'podium'];
 // 關(guān)卡地圖
 /*關(guān)卡*/
 var str = '0000000000000';
 str += ',0011100111010';
 str += ',1000010000200';
 str += ',1200333310101';
 str += ',0000444400001';
 str += ',3313300001011';
 str += ',3011331022011';
 str += ',3311031011011';
 str += ',0101011102010';
 str += ',0101011010010';
 str += ',0100000000110';
 str += ',0100012101101';
 str += ',0010015100000';
 // 存儲(chǔ)關(guān)卡地圖   0,1,2,3... 分別為1-n ... 關(guān)
 var Top_MapLevel = [str];

 // 游戲載入對(duì)象 整個(gè)游戲的核心對(duì)象
 GameLoader = function () {
     this._mapContainer = document.getElementById("divMap");  // 存放游戲地圖的div
     this._selfTank = null;  // 玩家坦克
     this._gameListener = null; // 游戲主循環(huán)計(jì)時(shí)器id
     /*v2.0新加的屬性*/
     this._level = 1;
     this._rowCount = 13;
     this._colCount = 13;
     this._battleField = []; // 存儲(chǔ)地圖對(duì)象二維數(shù)組
 }
 // 加載地圖方法
    Load: function () {
         // 根據(jù)等級(jí)初始化地圖
         var map = Top_MapLevel[this._level - 1].split(",");
         var mapBorder = UtilityClass.CreateE("div", "", "mapBorder", this._mapContainer);
         // 遍歷地圖表格中每一個(gè)單元格
         for (var i = 0; i < this._rowCount; i++) {
             // 創(chuàng)建div，每一行的地圖保存在這個(gè)div中
             var divRow = UtilityClass.CreateE("div", "", "", mapBorder);
             // 在一維數(shù)組中再創(chuàng)建一個(gè)數(shù)組
             this._battleField[i] = [];
             for (var j = 0; j < this._colCount; j++) {
                 // 讀取地圖數(shù)據(jù)，默認(rèn)值：0
                 var v = (map[i] && map[i].charAt(j)) || 0;
                 // 插入span元素，一個(gè)span元素即為一個(gè)地圖單位
                 var spanCol = UtilityClass.CreateE("span", "", "", divRow);
                 spanCol.className = ArrayCss[v];
                 // 將地圖對(duì)象放入二維數(shù)組中，便于后面碰撞檢測(cè)。
                 var to = null;
                 switch (v) {
                     case EnumMapCellType.Empty:
                         to = new EmptyB();
                         break;
                     case EnumMapCellType.Wall:
                         to = new WallB();
                         break;
                     case EnumMapCellType.Steel:
                         to = new SteelB();
                         break;
                     case EnumMapCellType.Tod:
                         to = new TodB();
                         break;
                     case EnumMapCellType.River:
                         to = new RiverB();
                         break;
                     case EnumMapCellType.Podium:
                         to = new PodiumB();
                         break;
                     default:
                         throw new Error("地圖數(shù)字越界！");
                         break;
                 }
                 to.UI = spanCol;
                 //這里的j就是X，因?yàn)閮?nèi)部循環(huán)是橫向的，x是橫坐標(biāo)
                 to.XPosition = j;
                 to.YPosition = i;
                 // 將當(dāng)前的地圖對(duì)象存入二維數(shù)組中obj為障礙物對(duì)象，occupier為占有對(duì)象
                 this._battleField[i][j] = { obj: to, occupier: null, lock: false };
             }   //end for
         }   // end for
         // 放入window全局變量
         window.BattleField = this._battleField;
     }