//public void putOnBoard(Square sq) puts the piece on the given square
//Piece is always created with square,field data members equal to null
import java.awt.*;
import java.util.*;
public class Piece
{
private int shape[][] = null; //shape tells how to draw the piece, 0 -bkgnd, 1 - piece's color
private Color color = null; //color with which to draw the piece
private Square square = null; //square where the piece stands
private Field field = null; //field where the piece is displayed
public String name = null; //"king/queen/rook/knight/bishop/pawn"
public String owner = null; //"white/black"
//makes sense only for pawns
public boolean enpasse = false; //can be taken en passe
//makes sense only for kings and rooks
public boolean cancastle = true;
public Piece() {}
//default shape and color for this piece
public Piece(String own, String nm)
{
owner = new String(own);
name = new String(nm);
setShape(name);
color = (owner.equals("white")) ? Colors.dwpiece : Colors.dbpiece;
}
public Piece(String own, String nm, int[][] s, Color c)
{
owner = own;
name = nm;
shape = s;
color = c;
}
//take owner,name,shape,color,enpasse,cancastle from Piece parameter
public Piece(Piece p)
{
if (p==null) return; //leave the piece with default(i.e. null) data members
shape = p.getShape();
color = p.getColor();
name = p.getName();
owner = p.getOwner();
enpasse = p.enpasse;
cancastle = p.cancastle;
}
public int[][] getShape() {return shape;}
public Color getColor() {return color;}
public Square getSquare() {return square;}
public Field getField() {return field;}
public String getName() {return name;}
public String getOwner() {return owner;}
public void setSquare(Square s) {square = s;}
public void setField(Field f) {field = f;}
private void setShape(String nm)
{
if (nm.equals("king")) shape = Shapes.dking;
else if (nm.equals("queen")) shape = Shapes.dqueen;
else if (nm.equals("rook")) shape = Shapes.drook;
else if (nm.equals("bishop")) shape = Shapes.dbishop;
else if (nm.equals("knight")) shape = Shapes.dknight;
else if (nm.equals("pawn")) shape = Shapes.dpawn;
}
//piece (it's a pawn) remembers its new name and shape
//Note! shape will be actually redrawn only after the call to putOnField()!
public void transform(String newPiece)
{
name = newPiece;
setShape(newPiece);
}
public void transform(int newPiece)
{
if (newPiece !=1 && newPiece != 2 && newPiece != 3 && newPiece != 4)
{
System.out.println("cannot transform " + name + " into " + newPiece); return;
}
switch(newPiece)
{
case 1: name = "queen"; break;
case 2: name = "rook"; break;
case 3: name = "bishop"; break;
case 4: name = "knight"; break;
}
setShape(name);
}
//analytically
public void putOnSquare(Square sq)
{
sq.setPiece(this); //tell this square that I have occupied it
if (square != null) square.setPiece(null); //tell previously occupied square that I'm relocating
square = sq; //remember where I stand now
}
//GUI
public void putOnField(Field fld)
{
fld.setPiece(this); //tell this field that I have occupied it; field remembers me and updates image
if (field != null) field.setPiece(null); //tell previously occupied field that I'm leaving it
field = fld; //remember where I stand now
}
public double value()
{
if (name.equals("king")) return 300;
if (name.equals("queen")) return 9;
if (name.equals("rook")) return 4.5;
if (name.equals("bishop")) return 3.1;
if (name.equals("knight")) return 3;
if (name.equals("pawn")) return 1;
return -2; //something's wrong
}
//1 - greater value that p; -1 - smaller value than p; 0 - equal value
public int compare(Piece p)
{
if (value() > p.value()) return 1;
if (value() < p.value()) return -1;
return 0;
}
//1 - greater name that p; -1 - smaller name than p; 0 - equal value
//where king > queen > rook > bishop > knight > pawn
public int compareName(Piece p)
{
String n1 = getName();
String n2 = p.getName();
if (n1.equals(n2)) return 0; //htey are the same
if (n1.equals("king")) {return 1;}
if (n1.equals("queen")) {if (n2.equals("king")) return -1; else return 1;}
if (n1.equals("rook")) {if (n2.equals("king") || n2.equals("queen")) return -1; else return 1;}
if (n1.equals("bishop")) {if (n2.equals("knight") || n2.equals("pawn")) return 1; else return -1;}
if (n1.equals("knight")) {if (n2.equals("pawn")) return 1; else return -1;}
if (n1.equals("pawn")) {return -1;}
return -2; //something's wrong
}
public String abbreviation()
{
if (name.equals("king")) return "K";
if (name.equals("queen")) return "Q";
if (name.equals("rook")) return "R";
if (name.equals("bishop")) return "B";
if (name.equals("knight")) return "Kt";
if (name.equals("pawn")) return "";
return "wrong name";
}
//receives a [9][9] array of references to Squares
//returns a Vector of moves
public Vector possibleMoves (Square[][] s)
{
Vector temp; //vector of squares
if (name.equals("king")) temp = square.kingMoves(s);
else if (name.equals("queen")) temp = square.queenMoves(s);
else if (name.equals("rook")) temp = square.rookMoves(s);
else if (name.equals("bishop")) temp = square.bishopMoves(s);
else if (name.equals("knight")) temp = square.knightMoves(s);
else if (name.equals("pawn")) temp = square.pawnMoves(s);
else temp = new Vector();
//System.out.println("Piece " + abbreviation() + square.coords() + " suggests " + temp.size() + " moves");
return temp;
}
public String toString()
{
String str = owner + " " + name + " on " + square.toString();
return str;
}
}