Package org.swtpra1.alphabetaplayer

Class RelativeTerritoryEvaluator

java.lang.Object

org.swtpra1.alphabetaplayer.RelativeTerritoryEvaluator

All Implemented Interfaces:

Evaluator

public class RelativeTerritoryEvaluator
extends java.lang.Object
implements Evaluator

Implements the "relative territory heuristic" for evaluating board states.

Constructor Summary

Constructors

Constructor	Description
RelativeTerritoryEvaluator()

Method Summary

Modifier and Type	Method	Description
static int[][]	copy2dArray(int[][] array)	Copy a 2-dimensional array because Arrays.copyOf doesn't work with 2d arrays.
float	evaluate(Board board, int playerId)	board value from perspective of player with given id.
int	getBoardValue(int[][] squares, int playerId)	Calculate the value of a board based on relative territory heuristic.

Methods inherited from class java.lang.Object

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

Constructor Detail

RelativeTerritoryEvaluator

public RelativeTerritoryEvaluator()

Method Detail

evaluate

public float evaluate(Board board,
                      int playerId)

board value from perspective of player with given id.

Specified by:

evaluate in interface Evaluator

Parameters:

board - the position to be evaluated

playerId - the player that moves next

Returns:

negative values for unfavorable boards; positive for favorable ones

getBoardValue

public int getBoardValue(int[][] squares,
                         int playerId)

Calculate the value of a board based on relative territory heuristic.

Parameters:

squares - the 'real' playboard

Returns:

value of board = number of squares i reach faster - number of squares my enemy reaches faster

copy2dArray

public static int[][] copy2dArray(int[][] array)

Copy a 2-dimensional array because Arrays.copyOf doesn't work with 2d arrays.

Parameters:

array - array to be copied

Returns:

copied array