List <Vector2> PawnMoves(Vector2 position, bool isWhite, bool firstMove)
{
Vector2 gridCoordinate = position;
List <Vector2> possibleMoves = new List <Vector2>();
Vector2 checkSpace = new Vector2();
PieceController checkInfo = null;
if (isWhite)
{
//check space in front is empty
if (gridCoordinate.y + 1 < 8) // checking if space is on the board
{
checkSpace = new Vector2(gridCoordinate.x, gridCoordinate.y + 1); //checking space directly infront
if (chessController.CheckPieceOnSquare(checkSpace) == null)
{
possibleMoves.Add(checkSpace);
}
}
//check if first move
if (firstMove && gridCoordinate.y + 2 < 8) //if first move can move two spaces
{
if (possibleMoves.Count > 0) //if piece can't move in front then it wont be able to move two in front
{
checkSpace = new Vector2(gridCoordinate.x, gridCoordinate.y + 2); //checking space two infront
if (chessController.CheckPieceOnSquare(checkSpace) == null) //if piece doesn't exist
{
possibleMoves.Add(checkSpace); //add coordinate for button
}
}
}
//check diagonal left
if (gridCoordinate.x - 1 >= 0 && gridCoordinate.y + 1 < 8) //check if space is on board
{
checkSpace = new Vector2(gridCoordinate.x - 1, gridCoordinate.y + 1); //checking space up and to the left
checkInfo = chessController.CheckPieceOnSquare(checkSpace);
//if there's no piece on the space, check if it's a en passant move
if (checkInfo == null)
{
checkInfo = chessController.CheckEnPassant(checkSpace);
}
if (checkInfo != null && checkInfo.isWhite == !isWhite) //checking if piece exists AND is piece is opposite colour
{
if (!checkInfo.isKing) //checking if piece is not a king
{
possibleMoves.Add(checkSpace);
}
}
}
//check diagonal right
if (gridCoordinate.x + 1 < 8 && gridCoordinate.y + 1 < 8) //check if space is on board
{
checkSpace = new Vector2(gridCoordinate.x + 1, gridCoordinate.y + 1); //checking space up and to the right
checkInfo = chessController.CheckPieceOnSquare(checkSpace);
//if there's no piece on the space, check if it's a en passant move
if (checkInfo == null)
{
checkInfo = chessController.CheckEnPassant(checkSpace);
}
if (checkInfo != null && checkInfo.isWhite == !isWhite) //checking if piece exists AND is piece is opposite colour
{
if (!checkInfo.isKing) //checking if piece is not a king
{
possibleMoves.Add(checkSpace);
}
}
}
}
else
{
if (gridCoordinate.y - 1 >= 0) // checking if space is on the board
{
checkSpace = new Vector2(gridCoordinate.x, gridCoordinate.y - 1); //checking space directly infront
checkInfo = chessController.CheckPieceOnSquare(checkSpace); //getting info on piece (if piece is there) on square
if (checkInfo == null) //if piece doesn't exist
{
possibleMoves.Add(checkSpace); //add coordinate for button
}
}
//check if first move
if (firstMove && gridCoordinate.y - 2 >= 0) //if first move can move two spaces
{
if (possibleMoves.Count > 0) //if piece can't move in front then it wont be able to move two in front
{
checkSpace = new Vector2(gridCoordinate.x, gridCoordinate.y - 2); //checking space two infront
checkInfo = chessController.CheckPieceOnSquare(checkSpace); //getting info on piece (if piece is there) on square
if (checkInfo == null) //if piece doesn't exist
{
possibleMoves.Add(checkSpace); //add coordinate for button
}
}
}
//check diagonal left
if (gridCoordinate.x - 1 >= 0 && gridCoordinate.y - 1 >= 0) //check if space is on board
{
checkSpace = new Vector2(gridCoordinate.x - 1, gridCoordinate.y - 1); //checking space up and to the left
checkInfo = chessController.CheckPieceOnSquare(checkSpace);
//if there's no piece on the space, check if it's a en passant move
if (checkInfo == null)
{
checkInfo = chessController.CheckEnPassant(checkSpace);
}
if (checkInfo != null && checkInfo.isWhite == !isWhite) //checking if piece exists AND is piece is opposite colour
{
if (!checkInfo.isKing) //checking if piece is not a king
{
possibleMoves.Add(checkSpace);
}
}
}
//check diagonal right
if (gridCoordinate.x + 1 < 8 && gridCoordinate.y - 1 >= 0) //check if space is on board
{
checkSpace = new Vector2(gridCoordinate.x + 1, gridCoordinate.y - 1); //checking space up and to the right
checkInfo = chessController.CheckPieceOnSquare(checkSpace);
//if there's no piece on the space, check if it's a en passant move
if (checkInfo == null)
{
checkInfo = chessController.CheckEnPassant(checkSpace);
}
if (checkInfo != null && checkInfo.isWhite == !isWhite) //checking if piece exists AND is piece is opposite colour
{
if (!checkInfo.isKing) //checking if piece is not a king
{
possibleMoves.Add(checkSpace);
}
}
}
}
return(possibleMoves);
}
