/// <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>
/// Copy constructor to make a new copy of this current state
/// This constructor is used to create temporary states in the ai.
/// </summary>
/// <param name="gameState">The state to be copied</param>
public CheckersGameState(CheckersGameState gameState)
{
whiteGamePieces = new List <CheckersPiece>();
blackGamePieces = new List <CheckersPiece>();
moveablePieces = new List <CheckersPiece>();
gameBoard = new CheckersBoard(gameState.gameBoard);
foreach (CheckersPiece piece in gameState.blackGamePieces)
{
CheckersPiece newPiece = new CheckersPiece(piece);
//find the active game piece
if (gameState.activeGamePiece != null && newPiece.position == gameState.activeGamePiece.position)
{
activeGamePiece = newPiece;
}
blackGamePieces.Add(newPiece);
}
foreach (CheckersPiece piece in gameState.whiteGamePieces)
{
CheckersPiece newPiece = new CheckersPiece(piece);
//find the active game piece
if (gameState.activeGamePiece != null && newPiece.position == gameState.activeGamePiece.position)
{
activeGamePiece = newPiece;
}
whiteGamePieces.Add(newPiece);
}
foreach (CheckersPiece piece in gameState.moveablePieces)
{
CheckersPiece newPiece = new CheckersPiece(piece);
moveablePieces.Add(newPiece);
}
playerColor = gameState.playerColor;
aiColor = gameState.aiColor;
turnColor = gameState.turnColor;
jumpExists = gameState.jumpExists;
winner = gameState.winner;
numTurnsPassed = gameState.numTurnsPassed;
}
/// <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);
}