staticestimator.java

来自「Svm based face detector code」· Java 代码 · 共 63 行

package com.sans.ninemen.core;
/**
 * This class has the static estimator functions for opening,Mid End game and also Improved heuristic 
 * @author sanshack
 *
 */

public class StaticEstimator {
	/**
	 * This is the static estimation function for the opening
	 * @param x
	 * @return heuristic value
	 */
	public static int defaultEstimator(String x) {
		int numWhitePieces = Utility.countChar(x, 'W');
		int numBlackPieces = Utility.countChar(x, 'B');
		return (numWhitePieces - numBlackPieces);
	}
	
	/**
	 * This is the static estimation for Mid End game
	 * @param x
	 * @param numBlackMoves
	 * @return heuristic value
	 */
	public static int midEndGameEstimator(String x,int numBlackMoves) {
		int numWhitePieces = Utility.countChar(x, 'W');
		int numBlackPieces = Utility.countChar(x, 'B');
		if(numBlackPieces<=2) {
			return (10000);
		} else if(numWhitePieces<=2) {
			return(-10000);
		} else if(numBlackMoves ==0 ) {
			return(10000);
		} else {
			return (1000*(numWhitePieces - numBlackPieces) - numBlackMoves);
		}		
	}
	
	/**
	 * This is the impoved static estimation function for both opening and midendgame
	 * @param x
	 * @param numBlackMoves
	 * @param numWhiteMoves
	 * @return heuristic value
	 */
	
	public static int midEndGameEstimatorImproved(String x,int numBlackMoves,int numWhiteMoves) {
		int numWhitePieces = Utility.countChar(x, 'W');
		int numBlackPieces = Utility.countChar(x, 'B');
		if(numBlackPieces<=2) {
			return (10000);
		} else if(numWhitePieces<=2) {
			return(-10000);
		} else if(numBlackMoves ==0 ) {
			return(10000);
		} else {
			return (100*(numWhitePieces - numBlackPieces) + (numWhiteMoves-numBlackMoves));
		}		
	}
	
}