/// <summary>
/// A little helper method to check if a group is dead.
/// The free liberties are checked and if they are = 0,
/// then the group is removed and the captured stones
/// counter increases
/// </summary>
/// <param name="pos">
/// A stone of the group to check for death
/// </param>
protected void CheckSurroundingGroupsForDeathHelper(ref BoardPosition pos)
{
if (pos == null)
{
return;
}
BoardPositionEntry entry = pos.Contains;
int size = 0;
if (pos != null)
{
if (!CheckForFreeLiberties(pos))
{
size = pos.Group.RemoveGroup(this);
}
}
if (entry == BoardPositionEntry.BLACK)
{
CapturedBlackStones += size;
}
else if (entry == BoardPositionEntry.WHITE)
{
CapturedWhiteStones += size;
}
}
/// <summary>
/// Places a new stone on the board at the
/// given position. This method then checks
/// if the new stone connects some groups
/// and if it kills any surrounding groups.
/// </summary>
/// <param name="x">
/// The new stone's x-Coordinate
/// </param>
/// <param name="y">
/// The new stone's y-Coordinate
/// </param>
/// <param name="entry">
/// The new stone's color
/// </param>
public void SetStone(int x, int y, BoardPositionEntry entry)
{
if (x < 0 || x >= size)
{
throw new System.Exception("Position out of range");
}
if (y < 0 || y >= size)
{
throw new System.Exception("Position out of range");
}
if (board[x, y].Contains == BoardPositionEntry.EMTPY)
{
board[x, y].Contains = entry;
}
ConnectToGroups(board[x, y]);
if (!CheckForFreeLiberties(board[x, y]))
{
System.Console.WriteLine("This move is not allowed!");
}
CheckSurroundingGroupsForDeath(board[x, y]);
MoveNumber++;
}
/// <summary>
/// Flips the board horizontally
/// </summary>
public void FlipBoardHorizontally()
{
for (int x = 0; x < Size; x++)
{
for (int y = 0; y < Size; y++)
{
BoardPositionEntry tmp = board[x, y].Contains;
board[x, y].Contains = board[x, Size - y - 1].Contains;
board[x, Size - y - 1].Contains = tmp;
}
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public int RemoveGroup(Board board)
{
int size = Stones.Count;
BoardPositionEntry entry = BoardPositionEntry.EMTPY;
foreach (BoardPosition pos in Stones)
{
entry = pos.Contains;
board.RemoveStone(pos);
}
Stones.Clear();
board.Groups.Remove(this);
return(size);
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="entry"></param>
public BoardPosition(int x, int y, BoardPositionEntry entry)
{
this.x = x;
this.y = y;
this.contains = entry;
}
/// <summary>
/// Places a new stone on the board at the
/// given position. This method then checks
/// if the new stone connects some groups
/// and if it kills any surrounding groups.
/// </summary>
/// <param name="x">
/// The new stone's x-Coordinate
/// </param>
/// <param name="y">
/// The new stone's y-Coordinate
/// </param>
/// <param name="entry">
/// The new stone's color
/// </param>
public void SetStone(int x, int y, BoardPositionEntry entry)
{
if(x < 0 || x >= size)
throw new System.Exception("Position out of range");
if (y < 0 || y >= size)
throw new System.Exception("Position out of range");
if (board[x, y].Contains == BoardPositionEntry.EMTPY)
board[x, y].Contains = entry;
ConnectToGroups(board[x, y]);
if (!CheckForFreeLiberties(board[x, y]))
{
System.Console.WriteLine("This move is not allowed!");
}
CheckSurroundingGroupsForDeath(board[x, y]);
MoveNumber++;
}
/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="entry"></param>
public BoardPosition(int x, int y, BoardPositionEntry entry)
{
this.x = x;
this.y = y;
this.contains = entry;
}
