def _get_legal_directions(board: np.array, board_size: int,
location: tuple, color_value: int) -> list:
legal_directions: List[Tuple[int, int]] = []
# check if location points to an empty spot
if board.item(location) != -1:
return legal_directions
# search in all directions
for direction in Board._directions:
found_opponent: bool = False # check wetter there is an opponent's disk
i: int = location[0] + direction[0]
j: int = location[1] + direction[1]
while 0 <= i < board_size and 0 <= j < board_size:
# while not out of the board, keep going
disk: int = board[i, j]
if disk == -1 or (disk == color_value and not found_opponent):
break # found empty spot or player's disk before finding opponent's disk
if disk == 1 - color_value:
found_opponent: bool = True # found opponent's disk
if disk == color_value and found_opponent:
legal_directions.append(
direction
) # found own disk after finding opponent's disk
break
i += direction[0]
j += direction[1]
return legal_directions
def _getIj(self, tile: np.array, ij: List[Tuple[int, int]] = None):
newIj = rollLowFreqIndex(self.window, ij)
if tile.item(newIj) < 1: return self._getIj(tile, ij)
return newIj
