public GridItem objectAt(int x, int y){
		GridItem e = null;
		if(x >= 0 && y >= 0 && x < size.width && y < size.height)
			e= grid[x][y];
		if(e == null)
			for(Player p : players)
				for(Bomb b : p.getBombs())
					if((int)(b.getX()/ICON_SIZE) == x && (int)(b.getY()/ICON_SIZE) == y)
						return b;
		return e;
	}