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HTML5+JS 《五子飞》游戏实现(四)夹一个和挑一对

在第一章我们已经说了怎么才能“夹一个”以及怎样才能挑一对,但那毕竟只是书面上的,对码农来讲,我们还是用代码讲解起来会更容易了解。

 

为了更容易对照分析,我们先把路线再次贴出来:

    // 可走的路线    this.lines = [        [ 0,  1,  2,  3,  4],        [ 5,  6,  7,  8,  9],        [10, 11, 12, 13, 14],        [15, 16, 17, 18, 19],        [20, 21, 22, 23, 24],        [ 0,  5, 10, 15, 20],        [ 1,  6, 11, 16, 21],        [ 2,  7, 12, 17, 22],        [ 3,  8, 13, 18, 23],        [ 4,  9, 14, 19, 24],        [ 0,  6, 12, 18, 24],        [ 4,  8, 12, 16, 20],        [ 2,  6, 10],        [ 2,  8, 14],        [10, 16, 22],        [14, 18, 22]    ];              

 

一、夹一个:

根据上面给出的有限路线中,要实现“夹一个”,首页这颗棋子的index得在[0,1,2...24]之中,我们循环搜索每条路线,只要找出符合条件的路线和位置就可把对方的棋子给吃掉。

首先我们找出棋子的目标位置是在哪条路线中:

int index = $.inArray(chess.point.index, this.lines[i]);//chess被移动的棋子,下同
if(index!=-1)//...

然后再找出该条线上能被吃掉的棋子是哪一个。如果按照水平方向来看,被吃掉的棋子有可能在左边,也有可能在右边,如果在左边,那么该方还有一个棋子应该在被吃掉的棋子的左边

var p1 = index > 1 ? this.chesses[this.lines[i][index - 1]].player : Player.None;    if (p1 != Player.None && p1 != chess.player) {        if (this.chesses[this.lines[i][index - 2]].player == chess.player) {            //...找到符合条件的路线

同理,如果被吃掉的棋子在右边,那么该方还有一个棋子应该在被吃掉的棋子的右边:

var p2 = index < this.lines[i].length - 2 ? this.chesses[this.lines[i][index + 1]].player : Player.None;    if (p2 != Player.None && p2 != chess.player) {        if (this.chesses[this.lines[i][index + 2]].player == chess.player) {            //...找到符合条件的路线

不过,因为按照规则,能夹对方棋子的同时,该条路径上仅且只能有三颗棋子,已方两颗,对方一颗,其他位置上是不能有棋子存在的

对于在左边的情况:

var bfind = true;// 是否找到能被吃的棋子for (j = 0; j < index - 2; j++) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;bfind = true;for (j = index + 1; j < this.lines[i].length; j++) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;chessArray.push([this.chesses[this.lines[i][index - 1]]]);// 找到了

对于在右边的情况:

var bfind = true;for (j = 0; j < index; j++) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;bfind = true;for (j = index + 3; j < this.lines[i].length; j++) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;chessArray.push([this.chesses[this.lines[i][index + 1]]]);// 找到了

 对于找到可以被夹掉的棋子我们记录下来,存到 chessArray 里面,以便进行其他操作。

二、挑一对:

同样,我们先找出棋子在哪条路径中:

index = $.inArray(chess.point.index, this.lines[i]);if (index > 0 && index < this.lines[i].length - 1) {

然后相对于夹一个来说简单很多,我们只要找出该棋子左右相邻的两个棋子是对方的棋子,且该条直线上其他位置都是空位就行了。

先找出左右相邻的两颗棋子:

var p1 = this.chesses[this.lines[i][index - 1]].player;var p2 = this.chesses[this.lines[i][index + 1]].player;if (p1 != chess.player && p2 != chess.player && p1 != Player.None && p2 != Player.None) {

再判断其他位置是空位:

var bfind = true;for (j = 0; j < index - 1; j++) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;bfind = true;for (j = this.lines[i].length - 1; j > index + 1; j--) {    if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }}if (!bfind) return;chessArray.push([this.chesses[this.lines[i][index - 1]], this.chesses[this.lines[i][index + 1]]]);// 找到了

 

现在实现了两个基本的函数,下一章里沃特再跟大家分析移动棋子。本章实现的两个函数归纳如下:

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    // 是否可“挑一对”    this.canCarry = function (chess) {        var p1, p2, j, index, bfind, chessArray = [];        for (var i = 0; i < this.lines.length; i++) {            index = $.inArray(chess.point.index, this.lines[i]);            if (index > 0 && index < this.lines[i].length - 1) {                p1 = this.chesses[this.lines[i][index - 1]].player;                p2 = this.chesses[this.lines[i][index + 1]].player;                if (p1 != chess.player && p2 != chess.player && p1 != Player.None && p2 != Player.None) {                    bfind = true;                    for (j = 0; j < index - 1; j++) {                        if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                    }                    if (!bfind) continue;                    bfind = true;                    for (j = this.lines[i].length - 1; j > index + 1; j--) {                        if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                    }                    if (!bfind) continue;                    chessArray.push([this.chesses[this.lines[i][index - 1]], this.chesses[this.lines[i][index + 1]]]);                }            }        }        return chessArray.length == 0 ? false : chessArray;    };    // 是否可“夹一个”    this.canClip = function (chess) {        var p1, p2, j, index, bfind, chessArray = [];        for (var i = 0; i < this.lines.length; i++) {            index = $.inArray(chess.point.index, this.lines[i]);            if (index != -1) {                p1 = index > 1 ? this.chesses[this.lines[i][index - 1]].player : Player.None;                p2 = index < this.lines[i].length - 2 ? this.chesses[this.lines[i][index + 1]].player : Player.None;                if (p1 != Player.None && p1 != chess.player) {                    if (this.chesses[this.lines[i][index - 2]].player == chess.player) {                        bfind = true;                        for (j = 0; j < index - 2; j++) {                            if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                        }                        if (!bfind) continue;                        bfind = true;                        for (j = index + 1; j < this.lines[i].length; j++) {                            if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                        }                        if (!bfind) continue;                        chessArray.push([this.chesses[this.lines[i][index - 1]]]);                    }                } else if (p2 != Player.None && p2 != chess.player) {                    if (this.chesses[this.lines[i][index + 2]].player == chess.player) {                        bfind = true;                        for (j = 0; j < index; j++) {                            if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                        }                        if (!bfind) continue;                        bfind = true;                        for (j = index + 3; j < this.lines[i].length; j++) {                            if (this.chesses[this.lines[i][j]].player != Player.None) { bfind = false; break; }                        }                        if (!bfind) continue;                        chessArray.push([this.chesses[this.lines[i][index + 1]]]);                    }                }            }        }        return chessArray.length == 0 ? false : chessArray;    };
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HTML5+JS 《五子飞》游戏实现(四)夹一个和挑一对