/// <summary>
/// This function is used to remove all captured pieces
/// </summary>
public void removeCapturedPieces()
{
//If it is white's turn, remove all captured black pieces
if (turnColor == PieceColor.White)
{
for (int index = 0; index < blackGamePieces.Count(); index++)
{
if (blackGamePieces[index].getCaptureStatus() == true)
{
gameBoard.getTileAt(blackGamePieces[index].position).unOccupy();
blackGamePieces.RemoveAt(index);
index--;
}
}
}
//else remove all captured white pieces
else
{
for (int index = 0; index < whiteGamePieces.Count(); index++)
{
if (whiteGamePieces[index].getCaptureStatus() == true)
{
gameBoard.getTileAt(whiteGamePieces[index].position).unOccupy();
whiteGamePieces.RemoveAt(index);
index--;
}
}
}
}
/// <summary>
/// Constructor for a state.
/// A new game state is initialized by passing in the color the player is playing as.
/// </summary>
/// <param name="playerClr">The color for the player</param>
public CheckersGameState(PieceColor playerClr)
{
gameBoard = new CheckersBoard();
whiteGamePieces = new List <CheckersPiece>();
blackGamePieces = new List <CheckersPiece>();
turnColor = PieceColor.None;
winner = PieceColor.None;
jumpExists = false;
//If a player color is passed in, the blow will initialize all the white and black pieces.
if (playerClr != PieceColor.None)
{
Vector2 blackPosition;
Vector2 whitePosition;
for (int index = 0; index < MAX_PIECES; index++)
{
//calculate the position for the black piece and the white piece
if (index < 3)
{
blackPosition = new Vector2(index * 2f, 5 - (index / 3));
whitePosition = new Vector2(index * 2f + 1, index / 3);
}
else
{
blackPosition = new Vector2((index * 2f + 1) - 6, 5 - (index / 3));
whitePosition = new Vector2((index * 2f) - 6, index / 3);
}
//Create the pieces with the calculated positions and add them the the list
CheckersPiece blackPiece = new CheckersPiece(new Vector2(blackPosition.X, blackPosition.Y), PieceColor.Black);
CheckersPiece whitePiece = new CheckersPiece(new Vector2(whitePosition.X, whitePosition.Y), PieceColor.White);
blackGamePieces.Add(blackPiece);
whiteGamePieces.Add(whitePiece);
//Set the tiles to be occupied
gameBoard.getTileAt(blackPosition).occupy(PieceColor.Black);
gameBoard.getTileAt(whitePosition).occupy(PieceColor.White);
}
//Set the player and ai colors
if (playerClr == PieceColor.Black)
{
playerColor = PieceColor.Black;
aiColor = PieceColor.White;
}
else
{
playerColor = PieceColor.White;
aiColor = PieceColor.Black;
}
}
}
/// <summary>
/// Function that will determine all possible moves for the piece
/// </summary>
/// <param name="gameBoard">The gameboard</param>
/// <param name="gameState">The current state of the game</param>
/// <param name="noShow">Whether or not to mark the board</param>
/// <returns>Type of move the piece has (NONE, MOVE, JUMP)</returns>
public TileStatus determineMoves(CheckersBoard gameBoard, CheckersGameState gameState, bool noShow = false)
{
TileStatus foundMove = TileStatus.NONE;
possibleMoves.Clear();
Vector2 tilePosition = new Vector2(position.X, position.Y);
List <GameMove> jumps = getJumps(tilePosition, gameBoard, gameState);
//Look for any jumps by the piece
if (jumps.Count != 0)
{
foundMove = TileStatus.JUMP;
possibleMoves = jumps;
gameState.jumpExists = true;
//Reset that the piece was just jumped over
//Necessary for multi-jumps
if (color == PieceColor.Black)
{
foreach (CheckersPiece piece in gameState.whiteGamePieces)
{
piece.justJumpedOver = false;
}
}
else if (color == PieceColor.White)
{
foreach (CheckersPiece piece in gameState.blackGamePieces)
{
piece.justJumpedOver = false;
}
}
}
//If no jump was found in the context of the turn find possible regular moves for the piece
else if (gameState.jumpExists == false)
{
List <GameMove> regularMoves = getRegularMoves(tilePosition, gameBoard, gameState);
if (regularMoves.Count != 0)
{
foundMove = TileStatus.MOVE;
possibleMoves = regularMoves;
}
}
if (noShow == false)
{
gameBoard.clearMarkings();
if (foundMove != TileStatus.NONE)
{
foreach (GameMove move in possibleMoves)
{
gameBoard.getTileAt(move.destinationPosition).setStatus(foundMove);
}
}
}
return(foundMove);
}
/// <summary>
/// Function that will find all regular moves for this piece
/// A regular move is a non-jump move
/// </summary>
/// <param name="tilePosition">The position of the tile to check jumps from</param>
/// <param name="gameBoard">The gameboard</param>
/// <param name="gameState">The current gamestate</param>
/// <returns>A list of possible regular moves</returns>
public List <GameMove> getRegularMoves(Vector2 tilePosition, CheckersBoard gameBoard, CheckersGameState gameState)
{
List <GameMove> regularMoves = new List <GameMove>();
//Below is the logic for if the checkers piece is black
if (color == PieceColor.Black)
{
//Get the two possible tiles a black piece could move to
BoardTile topLeftTile = gameBoard.getTileAt((int)tilePosition.X - 1, (int)tilePosition.Y - 1);
BoardTile topRightTile = gameBoard.getTileAt((int)tilePosition.X + 1, (int)tilePosition.Y - 1);
//If the tile exists on the board, add that tile as a possible move
if (topLeftTile != null && topLeftTile.getOccupiedStatus() == PieceColor.None)
{
regularMoves.Add(new GameMove(this, topLeftTile.position));
}
if (topRightTile != null && topRightTile.getOccupiedStatus() == PieceColor.None)
{
regularMoves.Add(new GameMove(this, topRightTile.position));
}
}
//Below is the logic for if the checkers piece is white
if (color == PieceColor.White)
{
//Get the two possible tiles a black piece could move to
BoardTile bottomLeftTile = gameBoard.getTileAt((int)tilePosition.X - 1, (int)tilePosition.Y + 1);
BoardTile bottomRightTile = gameBoard.getTileAt((int)tilePosition.X + 1, (int)tilePosition.Y + 1);
//If the tile exists on the board, add that tile as a possible move
if (bottomLeftTile != null && bottomLeftTile.getOccupiedStatus() == PieceColor.None)
{
regularMoves.Add(new GameMove(this, bottomLeftTile.position));
}
if (bottomRightTile != null && bottomRightTile.getOccupiedStatus() == PieceColor.None)
{
regularMoves.Add(new GameMove(this, bottomRightTile.position));
}
}
return(regularMoves);
}
/// <summary>
/// Function that will recursively find all the jump sequences possible by this piece
/// </summary>
/// <param name="tilePosition">The position of the tile to check jumps from</param>
/// <param name="gameBoard">The gameboard</param>
/// <param name="gameState">The current gamestate</param>
/// <returns>A list of possible jumps</returns>
public List <GameMove> getJumps(Vector2 tilePosition, CheckersBoard gameBoard, CheckersGameState gameState)
{
List <GameMove> jumps = new List <GameMove>();
//Get all the possible tiles that could result with a jump
BoardTile topLeftTile = gameBoard.getTileAt((int)tilePosition.X - 1, (int)tilePosition.Y - 1);
BoardTile topRightTile = gameBoard.getTileAt((int)tilePosition.X + 1, (int)tilePosition.Y - 1);
BoardTile bottomLeftTile = gameBoard.getTileAt((int)tilePosition.X - 1, (int)tilePosition.Y + 1);
BoardTile bottomRightTile = gameBoard.getTileAt((int)tilePosition.X + 1, (int)tilePosition.Y + 1);
BoardTile topLeftJumpTile = gameBoard.getTileAt((int)tilePosition.X - 2, (int)tilePosition.Y - 2);
BoardTile topRightJumpTile = gameBoard.getTileAt((int)tilePosition.X + 2, (int)tilePosition.Y - 2);
BoardTile bottomLeftJumpTile = gameBoard.getTileAt((int)tilePosition.X - 2, (int)tilePosition.Y + 2);
BoardTile bottomRightJumpTile = gameBoard.getTileAt((int)tilePosition.X + 2, (int)tilePosition.Y + 2);
//Set the enemy color
PieceColor enemyColor;
if (this.color == PieceColor.Black)
{
enemyColor = PieceColor.White;
}
else
{
enemyColor = PieceColor.Black;
}
//The below four if-elses will basically determine if there was a piece of the enemy color was jumped over
//by moving to a tile 2 diagonal tiles away. If there was a jump, it will mark the piece that it just jumped over
//and then recursively look for any other following jumps from that tile.
if (topLeftTile != null && topLeftTile.getOccupiedStatus() == enemyColor)
{
//Get the piece that was jumped over
CheckersPiece adjacentPiece = gameState.getPiece(enemyColor, topLeftTile.position);
if (topLeftJumpTile != null && topLeftJumpTile.getOccupiedStatus() == PieceColor.None && adjacentPiece.justJumpedOver == false)
{
//mark the piece as jumped over
adjacentPiece.justJumpedOver = true;
//Find any jumps from the new tile position
List <GameMove> sequenceJumps = getJumps(topLeftJumpTile.position, gameBoard, gameState);
//If there was no following jump then add the jump to the list of jump
if (sequenceJumps.Count == 0)
{
GameMove newJump = (new GameMove(this, topLeftJumpTile.position));
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
//Else for each following jump, add the piece the first jump captured to the list of captured pieces
else
{
foreach (GameMove jump in sequenceJumps)
{
//GameMove newJump = (new GameMove(this, jump.destinationPosition));
//jump.capturedPieces = jump.capturedPieces;
jump.capturedPieces.Add(adjacentPiece);
jumps.Add(jump);
}
}
}
}
if (topRightTile != null && topRightTile.getOccupiedStatus() == enemyColor)
{
CheckersPiece adjacentPiece = gameState.getPiece(enemyColor, topRightTile.position);
if (topRightJumpTile != null && topRightJumpTile.getOccupiedStatus() == PieceColor.None && adjacentPiece.justJumpedOver == false)
{
//get any jumps from that tile
adjacentPiece.justJumpedOver = true;
List <GameMove> sequenceJumps = getJumps(topRightJumpTile.position, gameBoard, gameState);
if (sequenceJumps.Count == 0)
{
GameMove newJump = (new GameMove(this, topRightJumpTile.position));
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
else
{
foreach (GameMove jump in sequenceJumps)
{
GameMove newJump = (new GameMove(this, jump.destinationPosition));
newJump.capturedPieces = jump.capturedPieces;
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
}
}
}
if (bottomLeftTile != null && bottomLeftTile.getOccupiedStatus() == enemyColor)
{
CheckersPiece adjacentPiece = gameState.getPiece(enemyColor, bottomLeftTile.position);
if (bottomLeftJumpTile != null && bottomLeftJumpTile.getOccupiedStatus() == PieceColor.None && adjacentPiece.justJumpedOver == false)
{
//get any jumps from that tile
adjacentPiece.justJumpedOver = true;
List <GameMove> sequenceJumps = getJumps(bottomLeftJumpTile.position, gameBoard, gameState);
if (sequenceJumps.Count == 0)
{
GameMove newJump = (new GameMove(this, bottomLeftJumpTile.position));
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
else
{
foreach (GameMove jump in sequenceJumps)
{
GameMove newJump = (new GameMove(this, jump.destinationPosition));
newJump.capturedPieces = jump.capturedPieces;
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
}
}
}
if (bottomRightTile != null && bottomRightTile.getOccupiedStatus() == enemyColor)
{
CheckersPiece adjacentPiece = gameState.getPiece(enemyColor, bottomRightTile.position);
if (bottomRightJumpTile != null && bottomRightJumpTile.getOccupiedStatus() == PieceColor.None && adjacentPiece.justJumpedOver == false)
{
//get any jumps from that tile
adjacentPiece.justJumpedOver = true;
List <GameMove> sequenceJumps = getJumps(bottomRightJumpTile.position, gameBoard, gameState);
if (sequenceJumps.Count == 0)
{
GameMove newJump = (new GameMove(this, bottomRightJumpTile.position));
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
else
{
foreach (GameMove jump in sequenceJumps)
{
GameMove newJump = (new GameMove(this, jump.destinationPosition));
newJump.capturedPieces = jump.capturedPieces;
newJump.capturedPieces.Add(adjacentPiece);
jumps.Add(newJump);
}
}
}
}
return(jumps);
}