From e7b8466e96187228a95ce6d3514e9af839c1a5b8 Mon Sep 17 00:00:00 2001 From: Ben Goldsworthy Date: Tue, 23 Jun 2020 22:33:38 +0100 Subject: [PATCH] Initial commit --- .gitignore | 23 +- LICENSE | 1348 +++++++++++++++++++------------------- media/LICENSE | 4 + media/SelectedSquare.jpg | Bin 0 -> 666 bytes media/black1.png | Bin 0 -> 984 bytes media/black2.png | Bin 0 -> 838 bytes media/black3.png | Bin 0 -> 1491 bytes media/black4.png | Bin 0 -> 1505 bytes media/black5.png | Bin 0 -> 2405 bytes media/black6.png | Bin 0 -> 1900 bytes media/white1.png | Bin 0 -> 970 bytes media/white2.png | Bin 0 -> 812 bytes media/white3.png | Bin 0 -> 1508 bytes media/white4.png | Bin 0 -> 1481 bytes media/white5.png | Bin 0 -> 2342 bytes media/white6.png | Bin 0 -> 1912 bytes src/ChessBoard.java | 420 ++++++++++++ src/ChessLogic.java | 80 +++ src/ChessProgram.java | 32 + src/ChessSquare.java | 160 +++++ src/Piece.java | 322 +++++++++ 21 files changed, 1693 insertions(+), 696 deletions(-) mode change 100644 => 100755 .gitignore mode change 100644 => 100755 LICENSE create mode 100755 media/LICENSE create mode 100755 media/SelectedSquare.jpg create mode 100755 media/black1.png create mode 100755 media/black2.png create mode 100755 media/black3.png create mode 100755 media/black4.png create mode 100755 media/black5.png create mode 100755 media/black6.png create mode 100755 media/white1.png create mode 100755 media/white2.png create mode 100755 media/white3.png create mode 100755 media/white4.png create mode 100755 media/white5.png create mode 100755 media/white6.png create mode 100755 src/ChessBoard.java create mode 100755 src/ChessLogic.java create mode 100755 src/ChessProgram.java create mode 100755 src/ChessSquare.java create mode 100755 src/Piece.java diff --git a/.gitignore b/.gitignore old mode 100644 new mode 100755 index 6143e53..62c65c1 --- a/.gitignore +++ b/.gitignore @@ -1,22 +1 @@ -# Compiled class file -*.class - -# Log file -*.log - -# BlueJ files -*.ctxt - -# Mobile Tools for Java (J2ME) -.mtj.tmp/ - -# Package Files # -*.jar -*.war -*.ear -*.zip -*.tar.gz -*.rar - -# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml -hs_err_pid* +spec.pdf diff --git a/LICENSE b/LICENSE old mode 100644 new mode 100755 index 94a9ed0..78df873 --- a/LICENSE +++ b/LICENSE @@ -1,674 +1,674 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/media/LICENSE b/media/LICENSE new file mode 100755 index 0000000..20ba94f --- /dev/null +++ b/media/LICENSE @@ -0,0 +1,4 @@ +The image files for the chess pieces were made by Wikipedia user @Cburnett + and licensed under a Creative +Commons BY-SA 3.0 Unported License. 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java.awt.Frame; +import java.awt.GridLayout; +import java.awt.Color; +import java.awt.event.*; +import java.util.List; +import java.util.ArrayList; + +/** + ** @author Ben Goldsworthy (rumperuu) + ** @version 0.92 + **/ +public class ChessBoard implements ActionListener, MouseListener { + private final int DEFAULT = 0, PIECESELECTED = 1; + private final int PAWN = 0, ROOK = 1, KNIGHT = 2, BISHOP = 3, QUEEN = 4, + KING = 5; + private final int WHITE = 0, BLACK = 1; + private final int NONE = 0, MOVABLE = 1, ATTACKABLE = 2; + private final int NULL = 9999; + + private boolean colour = true; + // Sets the initial piece (as a BLACK PAWN because the first piece placed + // is `piece++`, or the ROOK). + private int piece = PAWN, team = BLACK; + // Creates the 2D array to hold the `ChessBoard` of `ChessSquare`s. + private ChessSquare[][] chessSquare = new ChessSquare[8][8]; + // Creates a 3D array to hold the `ChessBoard` of chess `Piece`s. + private Piece[][][] pieces = new Piece[6][2][8]; + private Piece selectedPiece; + // Admittedly, the `ChessLogic` object doesn't do an awful lot right now + // but it'll be useful if I come back to this to add actual game rules + // (https://github.com/Rumperuu/ChessSim/issues/1). + private ChessLogic logic = new ChessLogic(); + + public ChessBoard() { + // Initialises the piece indices. + int pawnNum = 0, rookNum = 0, knightNum = 0, bishopNum = 0; + + // Sorts out the window, fullscreening and suchlike. + JFrame window = new JFrame(); + window.setExtendedState(Frame.MAXIMIZED_BOTH); + window.setUndecorated(true); + window.setTitle("Chess, but not as you know it"); + window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); + + // Creates a grid panel for the `ChessBoard` of `ChessSquare`s. + JPanel board = new JPanel(); + GridLayout grid = new GridLayout(8,8); + board.setLayout(grid); + + // For each rank 'y'... + for (int y = 0; y <= 7; y++) { + // ...switch the populating team to white if the black team's done. + if (y == 2) { + team = WHITE; + pawnNum = 0; + rookNum = 0; + knightNum = 0; + bishopNum = 0; + } + // Reset the square colour (e.g. the last square of row 0 is black, + // meaning the first square of row 1 would be set to white later on + // if not for this line). + colour = !colour; + // Resets the piece to `PAWN`. + piece = 0; + // ...and for each square in file 'x' of rank 'y'... + for (int x = 0; x <= 7; x++) { + // ...populate the board array with a new `ChessSquare`. + chessSquare[x][y] = new ChessSquare(x,y,colour); + // Change the colour for the next square. + colour = !colour; + // Add the `ChessSquare` to the board. + board.add(chessSquare[x][y]); + // Checks if the current rank is the top or bottom two + // (one of the only current uses of the `ChessLogic` class). + if (logic.startingRow(y)) { + // Checks if the current rank is the back rank + // (one of the other uses). + if (logic.backRank(y)) { + // If the square in file 'x' is the Queen or lower, increment + // `piece`... + if (x <= 4) piece++; + // ...else, if the square is the King, subtract 2 (to avoid + // two Queens). + else if (x == 5) piece = piece - 2; + // Otherwise, decrement `piece`. + else piece--; + + // Depending on the piece currently being added, populate + // the appropriate array dimension. + switch(piece) { + case ROOK: + pieces[ROOK][team][rookNum] = new Piece(x,y,team, + ROOK,rookNum); + chessSquare[x][y].setPiece(pieces[ROOK][team][rookNum++]); + break; + case KNIGHT: + pieces[KNIGHT][team][knightNum]= new Piece(x,y,team,KNIGHT, + knightNum); + chessSquare[x][y].setPiece(pieces[KNIGHT][team][knightNum++]); + break; + case BISHOP: + pieces[BISHOP][team][bishopNum]= new Piece(x,y,team,BISHOP, + bishopNum); + chessSquare[x][y].setPiece(pieces[BISHOP][team][bishopNum++]); + break; + case QUEEN: + pieces[QUEEN][team][0] = new Piece(x,y,team,QUEEN,0); + chessSquare[x][y].setPiece(pieces[QUEEN][team][0]); + break; + case KING: + pieces[KING][team][0] = new Piece(x,y,team,KING,0); + chessSquare[x][y].setPiece(pieces[KING][team][0]); + break; + } + } else { + pieces[PAWN][team][pawnNum]= new Piece(x,y,team,PAWN,pawnNum); + chessSquare[x][y].setPiece(pieces[PAWN][team][pawnNum++]); + } + } + // Adds the relevant listeners to the `ChessSquare`s. + chessSquare[x][y].addActionListener(this); + chessSquare[x][y].addMouseListener(this); + } + } + // Finishes off the display. + window.setContentPane(board); + window.setVisible(true); + } + + /* + * Handles the event of a `JButton` (or rather a `JButton`-extending + * `ChessSquare`) being moused over. As long as no piece is currently + * selected, the function displays faintly-highlighted available moves for + * the piece moused over. + */ + public void mouseEntered(MouseEvent e) { + if (logic.getState() == DEFAULT) { + ChessSquare enteredSquare = (ChessSquare)e.getSource(); + Piece presentPiece = null; + if (enteredSquare.hasPiece()) { + presentPiece = enteredSquare.getPiece(); + displayMoves(presentPiece, false); + } else defaultSquares(); + } + } + + /* + * Handle the other `MouseEvent`s, by not doing anything. Mouse dragging + * could potentially be useful in a later version for some sort of click-and- + * drag movement of pieces, but for now they're just here to get the compiler + * to stop throwing up errors at me. + */ + public void mouseExited(MouseEvent e) { + } + public void mousePressed(MouseEvent e) { + } + public void mouseReleased(MouseEvent e) { + } + public void mouseClicked(MouseEvent e) { + } + + /* + * Handles the event of a `JButton` (or rather a `JButton`-extending + * `ChessSquare`) being clicked. The function, depending on the game state + * and state of the `ChessSquare` clicked on, wipes the displayed moves from + * the `ChessBoard` or moves the selected piece, removing an attacked piece + * is necessary. + */ + public void actionPerformed(ActionEvent e) { + switch(logic.getState()) { + case DEFAULT: + ChessSquare selectedSquare = (ChessSquare) e.getSource(); + if (selectedSquare.hasPiece()) { + selectedPiece = selectedSquare.getPiece(); + // If no piece is selected, select the clicked piece... + displayMoves(selectedPiece, true); + logic.setState(PIECESELECTED); + } + break; + case PIECESELECTED: + // ...else, if a piece is selected... + ChessSquare clickedSquare = (ChessSquare)e.getSource(); + switch(clickedSquare.getState()) { + case NONE: + // ...if the square just clicked is an illegal move, wipe all moves + // from the `ChessBoard`... + defaultSquares(); + break; + case MOVABLE:case ATTACKABLE: + // get the coords of the new, clicked square + int newX = clickedSquare.getXPosition(); + int newY = clickedSquare.getYPosition(); + // and the details of the old, selected piece + int oldX = selectedPiece.getXPosition(); + int oldY = selectedPiece.getYPosition(); + int oldType = selectedPiece.getType(); + int oldTeam = selectedPiece.getTeam(); + int oldIndex = selectedPiece.getIndex(); + // move (and take the currently-residing piece, if + // applicable) to the square clicked + chessSquare[oldX][oldY].removePiece(); + clickedSquare.setPiece(selectedPiece); + // update the location of the moved piece + pieces[oldType][oldTeam][oldIndex].setXPosition(newX); + pieces[oldType][oldTeam][oldIndex].setYPosition(newY); + // if the moved piece was a pawn on its first move, disable its + // two-square move ability + if (oldType == PAWN) + pieces[PAWN][oldTeam][oldIndex].usedUpFirstMove(); + + // wipes the `ChessBoard` clean + defaultSquares(); + } + // resets the state of the game + logic.setState(DEFAULT); + } + } + + /* + * Displays the legal moves a selected or hovered-over piece can make, + * coloured according to whether the piece is selected or just hovered on. + */ + private void displayMoves(Piece piece, boolean hard) { + // get the relevant details of the piece now + List moves = new ArrayList(); + int pieceIndex = piece.getIndex(); + int pieceTeam = piece.getTeam(); + int pieceType = piece.getType(); + // get the relevant piece's complete moveset + moves = pieces[pieceType][pieceTeam][pieceIndex].showMoves(); + + // wipe the ChessBoard + defaultSquares(); + + // initialise the variable used to truncate movement paths due to + // obstacles + boolean skip = false; + boolean pawn = (pieceType == PAWN) ? true : false; + + // for the list of moves... + for (int i = 0; i < moves.size()-1; i++) { + // if the current move isn't the NULL character used as a terminator + // between chains of moves (e.g. all in a given direction)... + if ((int)moves.get(i) != NULL) { + // gets the x- and y-coords for later + int moveX = (int)moves.get(i); + int moveY = (int)moves.get(++i); + // sets skip to false, in case i got here from a truncate + skip = false; + // determines if the given ChessSquare is legal or illegal + skip = highlightSquare(moveX, moveY, pieceTeam, pawn, hard); + // if the square is illegal... + if (skip) { + // sets j to i to start from the current point in the movelist + int j = i; + // increment down the list from i until the next NULL + // separator/end of the line + while (((int)moves.get(j) != NULL) && (j < moves.size()-1)) { + j++; + } + // set i to the value after that NULL + i = j++; + } + } + } + + // if the given piece is a pawn... + if (pieceType == PAWN) { + // get the coordinate for the square up and to the right of the pawn + // (pX and pY have been used instead of something perhaps more + // informative in order to keep the source code within 80 + // characters' width in the for loop below) + int pX = pieces[PAWN][pieceTeam][pieceIndex].getXPosition() + 1; + int pY = pieces[PAWN][pieceTeam][pieceIndex].getYPosition(); + + // gets the appropriate rank for the direction the pawn is moving + if (pieceTeam == WHITE) pY -= 1; + else pY += 1; + + // performs the same task as highlightSquare(), but for the squares + // a pawn can make an attack to + for (int i=0;(pX < 8) && (pX > -1) && (i < 2);pX-=2,i++) { + boolean squareEmpty = false; + Piece presentPiece = null; + if (chessSquare[pX][pY].hasPiece()) + presentPiece = chessSquare[pX][pY].getPiece(); + else squareEmpty = true; + + if (!squareEmpty) { + if ((presentPiece.getTeam() != pieceTeam) + && (presentPiece.getType() != KING)) { + if (hard) { + chessSquare[pX][pY].setBackground(new Color(255,0,0)); + chessSquare[pX][pY].setState(ATTACKABLE); + } else { + chessSquare[pX][pY].setBackground(new Color(127,127,127)); + } + } + } + } + } + + // if this displaySquares() call is as a result of a piece being + // selected... + if (hard) { + // changes the game state + logic.setState(PIECESELECTED); + } + } + + /* + * Wipes the ChessBoard restoring the initial black & white checks. + */ + private void defaultSquares() { + // this is the same code from the constructor earlier + colour = true; + for (int x = 0; x <= 7; x++) { + colour = !colour; + for (int y = 0; y <= 7; y++) { + if (colour) chessSquare[x][y].setBackground(new Color(0, 0, 0)); + else chessSquare[x][y].setBackground(new Color(255, 255, 255)); + chessSquare[x][y].setState(NONE); + + colour = !colour; + } + } + } + + /* + * Highlights a given ChessSquare with colours dependent on a number of + * factors. + */ + private boolean highlightSquare(int x, int y, int team, + boolean pawn, boolean selected) { + boolean squareEmpty = false; + // get the piece on the selected square, if applicable + Piece presentPiece = null; + if (chessSquare[x][y].hasPiece()) + presentPiece = chessSquare[x][y].getPiece(); + else squareEmpty = true; + // if this highlighting is a result of a piece being selected, rather + // than just moused over... + if (selected) { + // if the square is clear... + if (squareEmpty) { + // sets the colour to green, and the state to that of a legal move + chessSquare[x][y].setBackground(new Color(0, 100, 0)); + chessSquare[x][y].setState(MOVABLE); + + // return that the square doesn't represent an obstacle + return false; + // ...else... + } else { + // ...if the square is occupied by an enemy piece... + if (presentPiece.getTeam() != team) { + // ...and the selected piece isn't a pawn (because their move + // forward can't be used as an attack), and the occupying piece + // isn't the enemy's king (because they can't be taken, only + // put in check)... + if ((!pawn) && (presentPiece.getType() != KING)) { + // sets the colour to red, and the state to that of a legal + // attack + chessSquare[x][y].setBackground(new Color(255, 0, 0)); + chessSquare[x][y].setState(ATTACKABLE); + } + } + + // return that the square does represent an obstacle + return true; + } + // ...else, if the piece has just been highlighted over, do the same as + // before, but with fainter shades of red and green + } else { + if (squareEmpty) { + chessSquare[x][y].setBackground(new Color(127, 127, 127)); + + return false; + } else { + if (presentPiece.getTeam() != team) { + if ((pawn) + && (presentPiece.getType() != KING)) { + // sets the colour to red, and the state to that of a legal + // attack + chessSquare[x][y].setBackground(new Color(127, 0, 0)); + } + } + + return true; + } + } + } +} diff --git a/src/ChessLogic.java b/src/ChessLogic.java new file mode 100755 index 0000000..b769e1d --- /dev/null +++ b/src/ChessLogic.java @@ -0,0 +1,80 @@ +/****************************************************************************** + * ChessSim 0.9 * + * Copyright © 2015 Ben Goldsworthy (rumperuu) * + * * + * A program to simulate a game of chess between two human players. * + * * + * This file is part of ChessSim. * + * * + * ChessSim is free software: you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation, either version 3 of the License, or * + * (at your option) any later version. * + * * + * ChessSim is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with ChessSim. If not, see . * + ******************************************************************************/ + +/** + ** This class represents chess logic, utilised in the ChessSim program. + **/ + +/** + ** @author Ben Goldsworthy (rumperuu) + ** @version 0.90 + **/ +public class ChessLogic { + // rumperuu <3 C-style pre-processor macros + private final int DEFAULT = 0, PIECESELECTED = 1; + + // stores the current state of the game + private int currentState; + + /** + ** Constructor function. + **/ + public ChessLogic() { + currentState = DEFAULT; + } + + /** + ** Determines if a given rank is the top or bottom two. + ** @param y the rank number + ** @return a boolean value + **/ + public boolean startingRow(int y) { + return (((y <= 1) || (y >= 6)) ? true : false); + } + + /** + ** Determines if a given rank is either team's back rank. Currently + ** used to populate pieces, but could also be called to deal with pawn + ** promotion if I ever got around to adding that. + ** @param y the rank number + ** @return a boolean value + **/ + public boolean backRank(int y) { + return (((y == 0) || (y == 7)) ? true: false); + } + + /** + ** Gets the current state of this chess game. + ** @return the state of this chess game + */ + public int getState() { + return currentState; + } + + /** + ** Sets the state of this chess game. + ** @param state the state of this chess game + */ + public void setState(int state) { + currentState = state; + } +} diff --git a/src/ChessProgram.java b/src/ChessProgram.java new file mode 100755 index 0000000..f767475 --- /dev/null +++ b/src/ChessProgram.java @@ -0,0 +1,32 @@ +/****************************************************************************** + * ChessSim 0.9 * + * Copyright © 2015 Ben Goldsworthy (rumperuu) * + * * + * A program to simulate a game of chess between two human players. * + * * + * This file is part of ChessSim. * + * * + * ChessSim is free software: you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation, either version 3 of the License, or * + * (at your option) any later version. * + * * + * ChessSim is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with ChessSim. If not, see . * + ******************************************************************************/ + +/** + ** @author Ben Goldsworthy (rumperuu) + ** @version 0.90 + **/ +public class ChessProgram { + public static void main(String[] arguments) { + // creates a new instance of the ChessBoard object + ChessBoard board = new ChessBoard(); + } +} diff --git a/src/ChessSquare.java b/src/ChessSquare.java new file mode 100755 index 0000000..fce7845 --- /dev/null +++ b/src/ChessSquare.java @@ -0,0 +1,160 @@ +/****************************************************************************** + * ChessSim 0.9 * + * Copyright © 2015 Ben Goldsworthy (rumperuu) * + * * + * A program to simulate a game of chess between two human players. * + * * + * This file is part of ChessSim. * + * * + * ChessSim is free software: you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation, either version 3 of the License, or * + * (at your option) any later version. * + * * + * ChessSim is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with ChessSim. If not, see . * + ******************************************************************************/ + +/** + ** This class represents a chess square, utilised in the ChessSim program. + **/ + +import javax.swing.*; +import java.awt.*; + +/** + ** @author Ben Goldsworthy (rumperuu) + ** @version 0.90 + **/ +public class ChessSquare extends JButton { + // C sells C shells on the C shore + private final int NONE = 0, MOVABLE = 1, ATTACKABLE = 2; + private final int NULL = 9999; + private final int WHITE = 0, BLACK = 1; + + // declares the array for piece icons + private ImageIcon[][] pieces = new ImageIcon[2][6]; + // declares the values for storing the details relevant to each instance of + // the ChessSquare + private Piece currentPiece; + private int xPosition, yPosition; + private int currentState; + + /** + ** Constructor function. + ** @param x the x-coord of the square, which doubles as its array x-index + ** @param y the y-coord of the square, which doubles as its array y-index + ** @param colour the colour of the square + **/ + public ChessSquare(int x, int y, boolean colour) { + // populates the array of piece icons + for (int i = 1; i <= 6; i++) { + pieces[WHITE][i-1] = new ImageIcon("images/white"+i+".png"); + pieces[BLACK][i-1] = new ImageIcon("images/black"+i+".png"); + } + + xPosition = x; + yPosition = y; + + // sets the background appropriately + setBackground(colour ? new Color(0,0,0) : new Color(255,255,255)); + + // sets the square to empty + currentPiece = null; + } + + /** + ** Removes the currently-occupying piece of this ChessSquare. + **/ + public void removePiece() { + currentPiece = null; + setIcon(null); + } + + public boolean hasPiece() { + if (currentPiece != null) return true; + else return false; + } + + /** + ** Gets the current x-coord of this ChessSquare. + ** @return the x-coord of this ChessSquare within the ChessBoard + **/ + public int getXPosition() { + return xPosition; + } + + /** + ** Gets the current y-coord of this ChessSquare. + ** @return the y-coord of this ChessSquare within the ChessBoard + **/ + public int getYPosition() { + return yPosition; + } + + /** + ** Gets the current piece on this ChessSquare. + ** @return the Piece object on this ChessSquare within the ChessBoard + **/ + public Piece getPiece() + { + return currentPiece; + } + + /** + ** Gets the current index of this ChessSquare. + ** @return the index of this ChessSquare within the ChessBoard + **/ + public int getPieceIndex() + { + return currentPiece.getIndex(); + } + + /** + * Obtains the type of the currently-occupying piece of this ChessSquare. + * @return the current piece type on this ChessSquare within the ChessBoard + */ + public int getPieceType() + { + return currentPiece.getType(); + } + + /** + * Obtains the team of the currently-occupying piece of this ChessSquare. + * @return the current piece team on this ChessSquare within the ChessBoard + */ + public int getPieceTeam() { + return currentPiece.getTeam(); + } + + /** + * Gets the state of this ChessSquare. + * @return the state of this ChessSquare within the ChessBoard + */ + public int getState() + { + return currentState; + } + + /** + ** Sets the currently-occupying piece on this ChessSquare. + ** @param piece the Piece object + **/ + public void setPiece(Piece piece) { + currentPiece = piece; + setIcon(pieces[piece.getTeam()][piece.getType()]); + } + + /** + ** Sets the current state of this ChessSquare. + ** @param state the new state + **/ + public void setState(int state) { + currentState = state; + } +} diff --git a/src/Piece.java b/src/Piece.java new file mode 100755 index 0000000..35cc97b --- /dev/null +++ b/src/Piece.java @@ -0,0 +1,322 @@ +/****************************************************************************** + * ChessSim 0.9 * + * Copyright © 2015 Ben Goldsworthy (rumperuu) * + * * + * A program to simulate a game of chess between two human players. * + * * + * This file is part of ChessSim. * + * * + * ChessSim is free software: you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation, either version 3 of the License, or * + * (at your option) any later version. * + * * + * ChessSim is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with ChessSim. If not, see . * + ******************************************************************************/ + +/** + ** This class represents a chess piece, utilised in the ChessSim program. + **/ + +import java.util.*; + +/** + ** @author Ben Goldsworthy (rumperuu) + ** @version 0.92 + **/ +public class Piece { + // they C me rollin', they hatin' + private final int NULL = 9999; + private final int WHITE = 0, BLACK = 1; + private final int PAWN = 0, ROOK = 1, KNIGHT = 2, BISHOP = 3, QUEEN = 4, + KING = 5; + + // declares all the variables that every piece, regardless of type, has + private int xPosition, yPosition; + private int pieceNum; + private int pieceTeam; + private int pieceType; + private List moves = new ArrayList(); + private boolean firstMove = false; + + + /** + ** Constructor function. + ** @param x the x-coord of the piece + ** @param y the y-coord of the piece + ** @param team the team of the piece + ** @param type the type of the piece + **/ + public Piece(int x, int y, int team, int type, int num) { + xPosition = x; + yPosition = y; + pieceTeam = team; + pieceType = type; + pieceNum = num; + + if (type == PAWN) + firstMove = true; + } + + /** + * Gets whether this is the first move for the piece, if it is a Pawn. + * @return a boolean value + */ + public boolean firstMove() { + return firstMove; + } + + /** + ** Sets the first move as used up. + **/ + public void usedUpFirstMove() { + firstMove = false; + } + + /** + ** Populates the movelist of the piece. + ** @return The list of moves, with NULL characters seperating linear paths + **/ + public List showMoves() { + // clears the movelist + getMoves().clear(); + + switch(pieceType) { + case PAWN: + // adds the the square(s) directly ahead of the piece + addPawn(firstMove); + break; + case ROOK: + // adds linear paths in all four orthagonal directions + addOrthagonals(1, 8); + break; + case KNIGHT: + // adds the non-linear L-shaped jump squares + addLs(); + break; + case BISHOP: + // adds linear paths in all four diagonal directions + addDiagonals(1, 8); + break; + case QUEEN: + // adds linear paths in all four diagonal and orthagonal directions + addDiagonals(1, 8); + addSeparator(); + addOrthagonals(1, 8); + break; + case KING: + // adds all adjacent squares + addDiagonals(1, 1); + addSeparator(); + addOrthagonals(1, 1); + break; + } + + // returns the movelist + return getMoves(); + } + + /** + ** Gets the current x-coord of this Piece. + ** @return the x-coord of this Piece within the ChessBoard. + **/ + public int getXPosition() { + return xPosition; + } + + /** + ** Gets the current y-coord of this Piece. + ** @return the y-coord of this Piece within the ChessBoard. + **/ + public int getYPosition() { + return yPosition; + } + + /** + ** Gets the array index of this Piece. + ** @return the array index of this Piece within the ChessBoard. + **/ + public int getIndex() { + return pieceNum; + } + + /** + ** Obtains the type of this Piece. + ** @return the current type of this Piece within the ChessBoard. + **/ + public int getType() { + return pieceType; + } + + /** + ** Obtains the team of this Piece. + ** @return the team of this Piece within the ChessBoard. + **/ + public int getTeam() { + return pieceTeam; + } + + /** + ** Sets the x-coord of this Piece. + ** @param x the x-coord of this Piece within the ChessBoard. + **/ + public void setXPosition(int x) { + xPosition = x; + } + + /** + ** Sets the y-coord of this Piece. + ** @param y the y-coord of this Piece within the ChessBoard. + **/ + public void setYPosition(int y) { + yPosition = y; + } + + /* + * Adds a move to this Piece. + */ + private void addMovement(int x, int y) { + moves.add(x); + moves.add(y); + } + + /* + * Adds a separator to the movelist. + */ + private void addSeparator() { + moves.add(NULL); + } + + /** + ** Gets the list of on-board moves for the piece + ** @return the list of moves. + **/ + public List getMoves() { + return moves; + } + + /* + * Determines whether a given move is on the board or not, i.e. that neither + * the x- or y-coords are less than 0 or more than 7. The direction passed + * as a param starts at diagonally up and to the left, and proceeds + * clockwise + */ + private boolean moveOnBoard(int x, int dir) { + switch(dir) { + case 0: + return ((xPosition - x >= 0) && (yPosition - x >= 0)); + case 1: + return (yPosition - x >= 0); + case 2: + return ((xPosition + x <= 7) && (yPosition - x >= 0)); + case 3: + return (xPosition + x <= 7); + case 4: + return ((xPosition + x <= 7) && (yPosition + x <= 7)); + case 5: + return (yPosition + x <= 7); + case 6: + return ((xPosition - x >= 0) && (yPosition + x <= 7)); + case 7: + return (xPosition - x >= 0); + default: + System.out.println("Error 02: no direction sent."); + return false; + } + } + + /* + * Adds a number of diagonal vectors to the movelist, separated by the + * NULL separator. + */ + private void addDiagonals(int x1, int x2) { + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 0)) + addMovement(xPosition - x, yPosition - x); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 2)) + addMovement(xPosition + x, yPosition - x); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 4)) + addMovement(xPosition + x, yPosition + x); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 6)) + addMovement(xPosition - x, yPosition + x); + } + } + + /* + * Adds a number of orthagonal vectors to the movelist, separated by the + * NULL separator. + */ + private void addOrthagonals(int x1, int x2) { + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 1)) + addMovement(xPosition, yPosition - x); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 3)) + addMovement(xPosition + x, yPosition); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 5)) + addMovement(xPosition, yPosition + x); + } + addSeparator(); + for (int x = x1; x <= x2; x++) { + if (moveOnBoard(x, 7)) + addMovement(xPosition - x, yPosition); + } + } + + /* + * Adds a number of non-linear L-shaped paths to the movelist, separated + * by the NULL separator. + */ + private void addLs() { + for (int x = 1, x2 = 2; x <= 2; x++, x2--) { + if ((xPosition + x <= 7) && (yPosition + x2 <= 7)) + addMovement(xPosition + x, yPosition + x2); + addSeparator(); + if ((xPosition - x >= 0) && (yPosition + x2 <= 7)) + addMovement(xPosition - x, yPosition + x2); + addSeparator(); + if ((xPosition + x <= 7) && (yPosition - x2 >= 0)) + addMovement(xPosition + x, yPosition - x2); + addSeparator(); + if ((xPosition - x >= 0) && (yPosition - x2 >= 0)) + addMovement(xPosition - x, yPosition - x2); + if (x2 == 2) addSeparator(); + } + } + + /* + * Adds the square(s) directly ahead of the pawn's current coords. + */ + private void addPawn(boolean firstMove) { + // adds the the square(s) directly ahead of the piece + if (pieceTeam == WHITE) { + if (moveOnBoard(1, 1)) + addMovement(getXPosition(), getYPosition() - 1); + if (firstMove) addMovement(getXPosition(), getYPosition() - 2); + } else if (pieceTeam == BLACK) { + if (moveOnBoard(1, 5)) + addMovement(getXPosition(), getYPosition() + 1); + if (firstMove) addMovement(getXPosition(), getYPosition() + 2); + } + } +}