/// <summary>
/// Checks to see if the current player has won the game by connecting 4 tokens on the antidiagonal.
/// </summary>
/// <param name="player">the current player</param>
/// <param name="i">Horizontal coordinate</param>
/// <param name="j">Vertical coordinate</param>
/// <returns>Returns true if antidiagonal victory has occurred.</returns>
private bool checkDiagonalToRight(char player, uint i, uint j)
{
if ((i + 3) < boardWidth && (j + 3) < boardHeight && board[i + 1, j + 1] == player &&
board[i + 2, j + 2] == player && board[i + 3, j + 3] == player)
{
victory = victoryTypes.diagonal;
return(true);
}
return(false);
}
/// <summary>
/// Checks to see if the current player has won the game by connecting 4 tokens on the main diagonal.
/// </summary>
/// <param name="player">the current player</param>
/// <param name="i">Horizontal coordinate</param>
/// <param name="j">Vertical coordinate</param>
/// <returns>Returns true if main diagonal victory has occurred.</returns>
private bool checkDiagonalToLeft(char player, uint i, uint j)
{
if ((i - 3) >= 0 && (j + 3) < boardHeight && board[i - 1, j + 1] == player &&
board[i - 2, j + 2] == player && board[i - 3, j + 3] == player)
{
victory = victoryTypes.diagonal;
return(true);
}
return(false);
}
/// <summary>
/// Checks to see if the current player has won the game by connecting 4 tokens horizontally.
/// </summary>
/// <param name="player">the current player</param>
/// <param name="i">Horizontal coordinate</param>
/// <param name="j">Vertical coordinate</param>
/// <returns>Returns true if horizontal victory has occurred.</returns>
private bool checkHorizonal(char player, uint i, uint j)
{
if ((i + 3) < boardWidth && board[i + 1, j] == player &&
board[i + 2, j] == player && board[i + 3, j] == player)
{
victory = victoryTypes.horizontal;
return(true);
}
return(false);
}
/// <summary>
/// Checks to see if the current player has won the game by connecting 4 tokens vertically.
/// </summary>
/// <param name="player">the current player</param>
/// <param name="i">Horizontal coordinate</param>
/// <param name="j">Vertical coordinate</param>
/// <returns>Returns true if vertical victory has occurred.</returns>
private bool checkVertical(char player, uint i, uint j)
{
if ((j + 3) < boardHeight && board[i, j + 1] == player &&
board[i, j + 2] == player && board[i, j + 3] == player)
{
victory = victoryTypes.vertical;
return(true);
}
return(false);
}
/// <summary>
/// Checks to see if the game has ended in a draw.
/// </summary>
/// <returns>Returns true if a draw has occurred, false if otherwise.</returns>
private bool checkDraw()
{
for (uint i = 0; i < boardWidth; i++)
{
if (board[i, boardHeight - 1] == 'o')
{
return(false);
}
}
victory = victoryTypes.draw;
return(true);
}
