private Square CheckRow(int row, Square[,] gameBoard, Square.State condition)
{
Square[] squares = new Square[3];
Square.State[] states = new Square.State[3];
squares[0] = gameBoard[row, 0];
squares[1] = gameBoard[row, 1];
squares[2] = gameBoard[row, 2];
states[0] = squares[0].owner;
states[1] = squares[1].owner;
states[2] = squares[2].owner;
// x x _
if (states[0] == condition && states[1] == condition && states[2] == Square.State.Empty)
{
return(squares[2]);
}
// x _ x
if (states[0] == condition && states[1] == Square.State.Empty && states[2] == condition)
{
return(squares[1]);
}
// _ x x
if (states[0] == Square.State.Empty && states[1] == condition && states[2] == condition)
{
return(squares[0]);
}
return(null);
}
private Square RightToLeftDiag(Square[,] gameBoard, Square.State condition)
{
Square[] squares = new Square[3];
Square.State[] states = new Square.State[3];
squares[0] = gameBoard[0, 2];
squares[1] = gameBoard[1, 1];
squares[2] = gameBoard[2, 0];
states[0] = squares[0].owner;
states[1] = squares[1].owner;
states[2] = squares[2].owner;
// x
// x
// _
if (states[0] == condition && states[1] == condition && states[2] == Square.State.Empty)
{
return(squares[2]);
}
// x
// _
// x
if (states[0] == condition && states[1] == Square.State.Empty && states[2] == condition)
{
return(squares[1]);
}
// _
// x
// x
if (states[0] == Square.State.Empty && states[1] == condition && states[2] == condition)
{
return(squares[0]);
}
return(null);
}
private Square CheckColumn(int column, Square[,] gameBoard, Square.State condition)
{
Square[] squares = new Square[3];
Square.State[] states = new Square.State[3];
squares[0] = gameBoard[0, column];
squares[1] = gameBoard[1, column];
squares[2] = gameBoard[2, column];
states[0] = squares[0].owner;
states[1] = squares[1].owner;
states[2] = squares[2].owner;
// x
// x
// _
if (states[0] == condition && states[1] == condition && states[2] == Square.State.Empty)
{
return(squares[2]);
}
// x
// _
// x
if (states[0] == condition && states[1] == Square.State.Empty && states[2] == condition)
{
return(squares[1]);
}
// _
// x
// x
if (states[0] == Square.State.Empty && states[1] == condition && states[2] == condition)
{
return(squares[0]);
}
return(null);
}
private Square CheckForCondition(Square.State condition)
{
Square squareToPick = null;
Square[,] gameBoard = board.GameBoard;
// Check top row
squareToPick = CheckRow(0, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check middle row
squareToPick = CheckRow(1, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check bottom row
squareToPick = CheckRow(2, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check left column
squareToPick = CheckColumn(0, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check middle column
squareToPick = CheckColumn(1, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check right column
squareToPick = CheckColumn(2, gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check left to right diag column
squareToPick = LeftToRightDiag(gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
// Check right to left diag column
squareToPick = RightToLeftDiag(gameBoard, condition);
if (squareToPick != null)
{
return(squareToPick);
}
return(squareToPick);
}
