// Calculates how many wins each characteristic of the piece to be played can win on any given board.
public static int calculateHeuristic(string[] gameBoard, string pieceToPlay)
{
byte pieceBinary;
byte[] pieces = new byte[16];
winningValues winningValues = new winningValues();
for (int i = 0; i < 10; i++)
{
winningValues.rowWon[i] = false;
}
// Array.Fill is not working in Unity as of 2/18/2020
// Array.Fill(rowWon, false);
pieceBinary = convertToBinaryRepresentation(pieceToPlay);
for (int i = 0; i < MAXGAMEBOARD; i++)
{
pieces[i] = convertToBinaryRepresentation(gameBoard[i]);
}
if (pieceToPlay == null)
{
winningValues.isPlaying = false;
}
//checks columns and rows for wins
int rowCounter = 0;
for (int colCounter = 0; colCounter < 4; colCounter++)
{
//checks rows for wins on all matches
winningValues = comparePiecesInRow(pieces[rowCounter], pieces[rowCounter + 1], pieces[rowCounter + 2], pieces[rowCounter + 3], colCounter, winningValues, pieceBinary, 1);
winningValues = comparePiecesInRow(pieces[rowCounter], pieces[rowCounter + 1], pieces[rowCounter + 2], pieces[rowCounter + 3], colCounter, winningValues, pieceBinary, 0);
//checks columns for wins on all matches
winningValues = comparePiecesInRow(pieces[colCounter], pieces[colCounter + 4], pieces[colCounter + 8], pieces[colCounter + 12], colCounter + 4, winningValues, pieceBinary, 1);
winningValues = comparePiecesInRow(pieces[colCounter], pieces[colCounter + 4], pieces[colCounter + 8], pieces[colCounter + 12], colCounter + 4, winningValues, pieceBinary, 0);
rowCounter += 4;
}
//check first diagonal for wins
winningValues = comparePiecesInRow(pieces[0], pieces[5], pieces[10], pieces[15], 8, winningValues, pieceBinary, 1);
winningValues = comparePiecesInRow(pieces[0], pieces[5], pieces[10], pieces[15], 8, winningValues, pieceBinary, 0);
//check second diagonal for wins
winningValues = comparePiecesInRow(pieces[3], pieces[6], pieces[9], pieces[12], 9, winningValues, pieceBinary, 1);
winningValues = comparePiecesInRow(pieces[3], pieces[6], pieces[9], pieces[12], 9, winningValues, pieceBinary, 0);
return(winningValues.finalResult);
}
public static winningValues checkWinRows(byte piece1, byte piece2, byte piece3, byte piece4, int rowNumber, winningValues winningValues, byte pieceBinary, int oddBit)
{
var slot1 = 0;
var slot2 = 0;
var slot3 = 0;
var slot4 = 0;
var potentialSlot = 0;
int oppositeBit;
if (oddBit == 1)
{
oppositeBit = 0;
}
else
{
oppositeBit = 1;
}
for (int k = 3; k >= 0; k--)
{
//checks rows for wins on all matches
slot1 = piece1 >> k;
slot2 = piece2 >> k;
slot3 = piece3 >> k;
slot4 = piece4 >> k;
potentialSlot = pieceBinary >> k;
winningValues.nullPiece = countNullPieces(piece1, piece2, piece3, piece4);
if (winningValues.nullPiece[1] > 1)
{
}
else
{
if (winningValues.nullPiece[0] == 1)
{
slot1 = oppositeBit;
}
else if (winningValues.nullPiece[0] == 2)
{
slot2 = oppositeBit;
}
else if (winningValues.nullPiece[0] == 3)
{
slot3 = oppositeBit;
}
else if (winningValues.nullPiece[0] == 4)
{
slot4 = oppositeBit;
}
if (winningValues.isPlaying && (slot1 % 2 == oddBit && slot2 % 2 == oddBit && slot3 % 2 == oddBit && potentialSlot % 2 == oddBit) ||
(slot1 % 2 == oddBit && slot2 % 2 == oddBit && slot4 % 2 == oddBit && potentialSlot % 2 == oddBit) ||
(slot1 % 2 == oddBit && slot3 % 2 == oddBit && slot4 % 2 == oddBit && potentialSlot % 2 == oddBit) ||
(slot2 % 2 == oddBit && slot3 % 2 == oddBit && slot4 % 2 == oddBit && potentialSlot % 2 == oddBit))
{
if (winningValues.rowWon[rowNumber] == false)
{
winningValues.finalResult++;
winningValues.rowWon[rowNumber] = true;
}
}
}
}
return(winningValues);
}
public static bool isWin(string[] gameBoard, string pieceToPlay, int boardPosition)
{
byte pieceBinary;
byte[] pieces = new byte[16];
winningValues winningValues = new winningValues();
for (int i = 0; i < 10; i++)
{
winningValues.rowWon[i] = false;
}
pieceBinary = convertToBinaryRepresentation(pieceToPlay);
for (int i = 0; i < MAXGAMEBOARD; i++)
{
pieces[i] = convertToBinaryRepresentation(gameBoard[i]);
}
if (boardPosition == 0 || boardPosition == 1 || boardPosition == 2 || boardPosition == 3)
{
winningValues = checkWinRows(pieces[0], pieces[1], pieces[2], pieces[3], 0, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[0], pieces[1], pieces[2], pieces[3], 0, winningValues, pieceBinary, 0);
}
if (boardPosition == 4 || boardPosition == 5 || boardPosition == 6 || boardPosition == 7)
{
winningValues = checkWinRows(pieces[4], pieces[5], pieces[6], pieces[7], 1, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[4], pieces[5], pieces[6], pieces[7], 1, winningValues, pieceBinary, 0);
}
if (boardPosition == 8 || boardPosition == 9 || boardPosition == 10 || boardPosition == 11)
{
winningValues = checkWinRows(pieces[8], pieces[9], pieces[10], pieces[11], 2, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[8], pieces[9], pieces[10], pieces[11], 2, winningValues, pieceBinary, 0);
}
if (boardPosition == 12 || boardPosition == 13 || boardPosition == 14 || boardPosition == 15)
{
winningValues = checkWinRows(pieces[12], pieces[13], pieces[14], pieces[15], 3, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[12], pieces[13], pieces[14], pieces[15], 3, winningValues, pieceBinary, 0);
}
if (boardPosition == 0 || boardPosition == 4 || boardPosition == 8 || boardPosition == 12)
{
winningValues = checkWinRows(pieces[0], pieces[4], pieces[8], pieces[12], 4, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[0], pieces[4], pieces[8], pieces[12], 4, winningValues, pieceBinary, 0);
}
if (boardPosition == 1 || boardPosition == 5 || boardPosition == 9 || boardPosition == 13)
{
winningValues = checkWinRows(pieces[1], pieces[5], pieces[9], pieces[12], 5, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[1], pieces[5], pieces[9], pieces[12], 5, winningValues, pieceBinary, 0);
}
if (boardPosition == 2 || boardPosition == 6 || boardPosition == 10 || boardPosition == 14)
{
winningValues = checkWinRows(pieces[2], pieces[6], pieces[10], pieces[14], 6, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[2], pieces[6], pieces[10], pieces[14], 6, winningValues, pieceBinary, 0);
}
if (boardPosition == 3 || boardPosition == 7 || boardPosition == 11 || boardPosition == 15)
{
winningValues = checkWinRows(pieces[3], pieces[7], pieces[11], pieces[15], 7, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[3], pieces[7], pieces[11], pieces[15], 7, winningValues, pieceBinary, 0);
}
if (boardPosition == 0 || boardPosition == 5 || boardPosition == 10 || boardPosition == 15)
{
winningValues = checkWinRows(pieces[0], pieces[5], pieces[10], pieces[15], 8, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[0], pieces[5], pieces[10], pieces[15], 8, winningValues, pieceBinary, 0);
}
if (boardPosition == 3 || boardPosition == 6 || boardPosition == 9 || boardPosition == 12)
{
winningValues = checkWinRows(pieces[3], pieces[6], pieces[9], pieces[12], 9, winningValues, pieceBinary, 1);
winningValues = checkWinRows(pieces[3], pieces[6], pieces[9], pieces[12], 9, winningValues, pieceBinary, 0);
}
if (winningValues.finalResult > 0)
{
return(true);
}
else
{
return(false);
}
}
