// Copyright by Barry G. Becker, 2012. Licensed under MIT License: http://www.opensource.org/licenses/MIT
package com.barrybecker4.game.twoplayer.pente.analysis.differencers;
import com.barrybecker4.game.twoplayer.common.TwoPlayerBoard;
import com.barrybecker4.game.twoplayer.pente.analysis.Line;
import com.barrybecker4.game.twoplayer.pente.analysis.LineFactory;
import com.barrybecker4.game.twoplayer.pente.pattern.Patterns;
import com.barrybecker4.optimization.parameter.ParameterArray;
/**
* Determines the difference in value between the most recent move
* and how it was before in the upward diagonal direction.
*
* @author Barry Becker
*/
public class UpDiagonalDifferencer extends DiagonalDifferencer {
public UpDiagonalDifferencer(TwoPlayerBoard board, Patterns patterns,
LineFactory lineFactory) {
super(board, patterns, lineFactory);
}
@Override
public int findValueDifference(int row, int col, ParameterArray weights) {
init();
int startc = col - winLength;
int startr = row + winLength;
if ( startc < 1 ) {
startr += startc - 1;
startc = 1;
}
if ( startr > numRows ) {
startc += startr - numRows;
startr = numRows;
}
int stopc = col + winLength;
int stopr = row - winLength;
if ( stopc > numCols ) {
stopr += + stopc - numCols;
stopc = numCols;
}
if ( stopr < 1 ) {
stopc += stopr - 1;
}
Line line = lineFactory_.createLine(patterns_, weights);
for (int i = startc; i <= stopc; i++ )
line.append( board_.getPosition( startr - i + startc, i ) );
int position = col - startc;
return line.computeValueDifference(position);
//line.worthDebug(Direction.UP_DIAGONAL.name(), position, diff);
}
}