//A priority is chosen based on the highest priority of all squares
//Assuming the board is symmetrical, only the highest priority square will get chosen by the AI
public TTTIndividualSymmetry(TTTSquare[] testedSquares, TTTBoardSymmetryCheck owner)
{
squares = testedSquares;
mainOwner = owner;
for (int i = 0; i < squares.Length; ++i)
{
squares[i].symmetries.Add(this);
if (symmetryPriority < squares[i].priority)
{
symmetryPriority = squares[i].priority;
}
}
owner.AddSymmetry(this);
UpdateSymmetry();
}
//register all types of symmetries the board can have
void SetSymmetries()
{
symmetryTypes = new List <TTTBoardSymmetryCheck>();
TTTBoardSymmetryCheck XaxisSymmetry = new TTTBoardSymmetryCheck();
TTTBoardSymmetryCheck YaxisSymmetry = new TTTBoardSymmetryCheck();
TTTBoardSymmetryCheck DiagonalBackSlashSymmetry = new TTTBoardSymmetryCheck();
TTTBoardSymmetryCheck DiagonalForwardSlashSymmetry = new TTTBoardSymmetryCheck();
TTTBoardSymmetryCheck QuarterRotationalSymmetry = new TTTBoardSymmetryCheck();
TTTBoardSymmetryCheck HalfRotationalSymmetry = new TTTBoardSymmetryCheck();
symmetryTypes.Add(XaxisSymmetry);
symmetryTypes.Add(YaxisSymmetry);
symmetryTypes.Add(DiagonalBackSlashSymmetry);
symmetryTypes.Add(DiagonalForwardSlashSymmetry);
symmetryTypes.Add(QuarterRotationalSymmetry);
symmetryTypes.Add(HalfRotationalSymmetry);
TTTIndividualSymmetry sym;
//All the extra set up is taken care of in the TTTIndividualSymmetry constructor, so we only have to worry about whats sets of squares here are symmetrical
for (int i = 0; i < boardLength; ++i)
{
for (int j = 0; j < boardLength / 2; ++j)
{
sym = new TTTIndividualSymmetry(new TTTSquare[] { board[i][j], board[i][boardLength - 1 - j] }, XaxisSymmetry);
}
}
for (int i = 0; i < boardLength / 2; ++i)
{
for (int j = 0; j < boardLength; ++j)
{
sym = new TTTIndividualSymmetry(new TTTSquare[] { board[i][j], board[boardLength - 1 - i][j] }, YaxisSymmetry);
}
}
for (int i = 0; i < boardLength; ++i)
{
for (int j = 0; j < i; ++j)
{
sym = new TTTIndividualSymmetry(new TTTSquare[] { board[i][j], board[j][i] }, DiagonalForwardSlashSymmetry);
}
}
for (int i = 0; i < boardLength; ++i)
{
for (int j = boardLength - 1; j >= boardLength - i; --j)
{
sym = new TTTIndividualSymmetry(new TTTSquare[] { board[i][j], board[boardLength - 1 - j][boardLength - 1 - i] }, DiagonalBackSlashSymmetry);
}
}
for (int i = 0; i < (boardLength + 1) / 2; ++i)
{
for (int j = 0; j < boardLength / 2; ++j)
{
sym = new TTTIndividualSymmetry(
new TTTSquare[] { board[i][j], board[boardLength - 1 - j][i], board[boardLength - 1 - i][boardLength - 1 - j], board[j][boardLength - 1 - i] },
QuarterRotationalSymmetry
);
}
}
for (int i = 0; i < (boardLength * boardLength) / 2; ++i)
{
sym = new TTTIndividualSymmetry(new TTTSquare[] { board[i / boardLength][i % boardLength], board[boardLength - 1 - i / boardLength][boardLength - 1 - i % boardLength] }, HalfRotationalSymmetry);
}
}