viergewinnt

Class BitField

java.lang.Object

viergewinnt.AbstractField

viergewinnt.BitField

public class BitField
extends AbstractField

Connect-4 field implemented in a single 64-Bit long

Field Summary

Fields inherited from class viergewinnt.AbstractField

height, turnCounter, width

Constructor Summary

Constructors

Constructor and Description
BitField(int w, int h) width * (height+1) must be smaller than or equal to 64

Method Summary

Methods

Modifier and Type	Method and Description
boolean	checkWin(int player) Check if player (0 or 1) has won
double	evaluatePlayerZero() Count the number of possible 4-in a row one can build using existing coins plus empty spaces.
long	getConfig() Get the configuration of the Board in a long Returns the symmetric configuration if its number is smaller
int	getField(int x, int y) What is on field x,y?
boolean	isOpen(int column) Checks if there can a coin be dropped into
void	makeMove(int column) Makes a move (also for the symmetric situation)
void	undoMove() Undoes a move (also for the symmetric situation)

Methods inherited from class viergewinnt.AbstractField

checkDraw, getPlayer, getTurnCounter, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

BitField

public BitField(int w,
        int h)

width * (height+1) must be smaller than or equal to 64

Parameters:

w -

h -

Method Detail

getConfig

public long getConfig()

Get the configuration of the Board in a long Returns the symmetric configuration if its number is smaller

Returns:

makeMove

public void makeMove(int column)

Makes a move (also for the symmetric situation)

Specified by:

makeMove in class AbstractField

Parameters:

column -

undoMove

public void undoMove()

Undoes a move (also for the symmetric situation)

Specified by:

undoMove in class AbstractField

checkWin

public boolean checkWin(int player)

Description copied from class: AbstractField

Check if player (0 or 1) has won

Specified by:

checkWin in class AbstractField

Returns:

evaluatePlayerZero

public double evaluatePlayerZero()

Count the number of possible 4-in a row one can build using existing coins plus empty spaces. I don't believe this heuristic to be very good. Experiement with others.

Specified by:

evaluatePlayerZero in class AbstractField

Returns:

getField

public int getField(int x,
           int y)

Description copied from class: AbstractField

What is on field x,y?

Specified by:

getField in class AbstractField

Returns:

-1 (empty), 0 (player 1) or 1 (player 2)

isOpen

public boolean isOpen(int column)

Description copied from class: AbstractField

Checks if there can a coin be dropped into

Specified by:

isOpen in class AbstractField

Returns: