Tic-Tac-Toe/KnotsAndCrosses.java at main · AG-Coding/Tic-Tac-Toe · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
import java.util.ArrayList;

// Game.java creates an object from the class KnotsAndCrosses
public class KnotsAndCrosses {


    String[][] board; //board positions are stored as a 2d array
    String x = "X";
    String o = "O";

    public KnotsAndCrosses() {
        board = new String[3][3];
    }

    public boolean checkWinner(String player, String[][] board) { //called after a move is played, takes in the player (X or O) and the current board,  and returns wether the player has one
        int checkrow = 0;
        int direction = -1;
        int[] checkColumn = new int[3];
        int diagonal1 = 0;
        int diagonal2 = 0;

        for (int i = 0; i < 3; i++) {
            checkrow = 0;

            for (int j = 0; j < 3; j++) {
                if (board[j][i] == null) {
                    continue;
                } else if (board[j][i].equals(player)) {
                    checkrow++;
                    checkColumn[j]++;
                    if (i == j) {
                        diagonal1++;
                    }
                    if (i + j == 2) {
                        diagonal2++;
                    }
                }

                if (checkrow == 3) { //checks if the player has won horizontally
                    return true;
                }

                for (int k = 0; k < 3; k++) { //checks if the player has won vertically
                    if (checkColumn[k] == 3) {
                        return true;
                    }
                }
                if (diagonal1 == 3) {//checks if the player has won on the negative diagonal
                    return true;
                }

                if (diagonal2 == 3) {//checks if the player has won on the positive diagonal
                    return true;
                }
            }
        }
        return false;
    }

    public ArrayList<Integer> lineCord(String player, String[][] board) {//called after a move is played, takes in the player (X or O) and the current board, returns integers that help Game.java draw a line

        ArrayList<Integer> cordsDirection = new ArrayList<Integer>(); //first cell: x cord , second cell: y cord, thrid cell: direction
        int checkrow = 0;
        int direction = -1;
        int[] checkColumn = new int[3];
        int diagonal1 = 0;
        int diagonal2 = 0;

        for (int i = 0; i < 3; i++) {
            checkrow = 0;
            for (int j = 0; j < 3; j++) {
                if (board[j][i] == null) {
                    continue;
                } else if (board[j][i].equals(player)) {
                    checkrow++;
                    checkColumn[j]++;
                    if (i == j) {
                        diagonal1++;
                    }
                    if (i + j == 2) {
                        diagonal2++;
                    }
                }

                if (checkrow == 3) {
                    //fills the arraylist with coordinates and direction that help place the line in the right place and at the correct angle
                    cordsDirection.add(0, j); //x cordinate
                    cordsDirection.add(1, i); //y coordinate
                    cordsDirection.add(2, 1); //dirction: horizontal
                    return cordsDirection;
                }

                for (int k = 0; k < 3; k++) {
                    if (checkColumn[k] == 3) {
                        cordsDirection.add(0, j);
                        cordsDirection.add(1, i);
                        cordsDirection.add(2, 2); //dircetion: vertical
                        return cordsDirection;
                    }
                }
                if (diagonal1 == 3) {
                    cordsDirection.add(0, j);
                    cordsDirection.add(1, i);
                    cordsDirection.add(2, 3); //direction: negative diagonal
                    return cordsDirection;
                }

                if (diagonal2 == 3) {
                    cordsDirection.add(0, j);
                    cordsDirection.add(1, i);
                    cordsDirection.add(2, 4); //direction: positive diagnoal
                    return cordsDirection;
                }
            }
        }
        return cordsDirection;
    }
}