Exemple #1
0
        //method that moves a pawn and checks to make sure move is valid
        public void MovePawn(ChessPawn pawn, int verticalMotion, int horizontalMotion)
        {
            if (pawn.Color.Equals("Black", StringComparison.OrdinalIgnoreCase))
            {
                verticalMotion = verticalMotion;
            }
            else
            {
                verticalMotion = -verticalMotion;
            }

            Console.WriteLine("Pawn entered");
            if (!((ChessPawn)pawn).FirstMoveTaken)
            {
                if (verticalMotion > 2)
                {
                    throw new System.InvalidOperationException("Pawns cannot move that far vertically, even on the first move.");
                }
                else if (verticalMotion < 0)
                {
                    throw new System.InvalidOperationException("Pawns cannot move backwards.");
                }
                else if (horizontalMotion < -1 || horizontalMotion > 1)
                {
                    throw new System.InvalidOperationException("Pawns can never move more than one space horizontally.")
                }
                else if (horizontalMotion != 0 && !Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied ||
                         Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece != null &&
                         Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece.Color.Equals(pawn.Color))
                {
                    throw new System.InvalidOperationException("Pawns cannot move horizontally without attacking a piece of the opposite color.");
                }
                else
                {
                    if (Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition +])
Exemple #2
0
        /// <summary>
        /// Allows a pawn to move
        /// </summary>
        /// <param name="pawn">Requires an object of the pawn class</param>
        /// <param name="verticalMotion">How far a pawn is being moved vertically</param>
        /// <param name="horizontalMotion">How far a pawn is being moved horizontally</param>
        public void MovePawn(ChessPawn pawn, int verticalMotion, int horizontalMotion)
        {
            //contains logic if a pawn is taking its first move
            if (!((ChessPawn)pawn).FirstMoveTaken)
            {
                //ensures the pawn does not move more than 2 spaces forward
                if (verticalMotion > 2)
                {
                    throw new System.InvalidOperationException("Pawns cannot move that far vertically, even on the first move.");
                }
                //ensures the pawn does not move backwards
                else if (verticalMotion < 0)
                {
                    throw new System.InvalidOperationException("Pawns cannot move backwards.");
                }
                //makes the game more user friendly, and flips the sign of vertical motion if white pieces are used
                if (pawn.Color.Equals("Black", StringComparison.OrdinalIgnoreCase))
                {
                    verticalMotion = verticalMotion;
                }
                else
                {
                    verticalMotion = -verticalMotion;
                }

                //ensures the user is not trying to move the pawn too far horizontally
                if (horizontalMotion < -1 || horizontalMotion > 1)
                {
                    throw new System.InvalidOperationException("Pawns can never move more than one space horizontally.");
                }
                //ensures that the user cannot move a pawn diagonally without attacking another piece
                else if (horizontalMotion != 0 && !Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied ||
                         Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece != null &&
                         Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece.Color.Equals(pawn.Color))
                {
                    throw new System.InvalidOperationException("Pawns cannot move horizontally without attacking a piece of the opposite color.");
                }
                //Logic for a successful move/attack
                else
                {
                    if (Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied && horizontalMotion == 1 ||
                        Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied && horizontalMotion == -1)
                    {
                        Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece.Defeat(
                            Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece);
                    }
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece =
                        Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece;
                    Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece = null;
                    Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].IsOccupied = false;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied = true;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece.HorizontalPosition = pawn.HorizontalPosition + horizontalMotion;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition].ChessPiece.VerticalPosition = pawn.VerticalPosition + verticalMotion;
                }
            }

            ///contains logic if a pawn is taking any move after its first
            else
            {
                if (verticalMotion == 2)
                {
                    throw new System.InvalidOperationException("Pawns can only move that far vertically on the first move.");
                }
                else if (verticalMotion > 1)
                {
                    throw new System.InvalidOperationException("Pawns cannot move that far forward.");
                }

                if (pawn.Color.Equals("Black", StringComparison.OrdinalIgnoreCase))
                {
                    verticalMotion = verticalMotion;
                }
                else
                {
                    verticalMotion = -verticalMotion;
                }

                if (horizontalMotion < -1 || horizontalMotion > 1)
                {
                    throw new System.InvalidOperationException("Pawns can never move more than one space horizontally.");
                }
                else
                {
                    if (Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied && horizontalMotion == 1 ||
                        Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied && horizontalMotion == -1)
                    {
                        Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece.Defeat(
                            Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece);
                    }
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece =
                        Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece;
                    Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].ChessPiece = null;
                    Chessboard[pawn.VerticalPosition, pawn.HorizontalPosition].IsOccupied = false;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].IsOccupied = true;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition + horizontalMotion].ChessPiece.HorizontalPosition = pawn.HorizontalPosition + horizontalMotion;
                    Chessboard[pawn.VerticalPosition + verticalMotion, pawn.HorizontalPosition].ChessPiece.VerticalPosition = pawn.VerticalPosition + verticalMotion;
                }
            }
        }