/** Copyright by Barry G. Becker, 2000-2011. Licensed under MIT License: http://www.opensource.org/licenses/MIT */
package com.barrybecker4.game.twoplayer.go.board.update;
import com.barrybecker4.game.common.GameContext;
import com.barrybecker4.game.twoplayer.go.board.GoBoard;
import com.barrybecker4.game.twoplayer.go.board.elements.position.GoBoardPosition;
import com.barrybecker4.game.twoplayer.go.board.elements.position.GoStone;
/**
* Responsible for determining and updating the dead stones on the board.
* @author Barry Becker
*/
public final class DeadStoneUpdater {
private GoBoard board_;
/** keeps track of dead stones. */
private DeadStones deadStones_;
/**
* Construct the Go game controller.
*/
public DeadStoneUpdater(GoBoard board) {
board_ = board;
deadStones_ = new DeadStones();
}
public int getNumDeadStonesOnBoard(boolean forPlayer1) {
return deadStones_.getNumberOnBoard(forPlayer1);
}
/**
* Update the final life and death status of all the stones still on the board.
* This method must only be called once at the end of the game or stones will get prematurely marked as dead.
* The first can update the health of groups and perhaps remove obviously dead stones.
*/
public void determineDeadStones() {
deadStones_.clear();
for ( int row = 1; row <= board_.getNumRows(); row++ ) {
for ( int col = 1; col <= board_.getNumCols(); col++ ) {
GoBoardPosition space = (GoBoardPosition)board_.getPosition( row, col );
if (space.isOccupied()) {
GoStone stone = (GoStone)space.getPiece();
int side = (stone.isOwnedByPlayer1() ? 1: -1);
GameContext.log(1, "life & death: "+space+" health="+stone.getHealth());
if (side*stone.getHealth() < 0) {
// then the stone is more dead than alive, so mark it so
GameContext.log(0, "setting " + space + " to dead");
stone.setDead(true);
deadStones_.increment(space.getPiece().isOwnedByPlayer1());
}
}
}
}
GameContext.log(0, deadStones_.toString());
}
}