def is_legal(coords):
(q, r, k) = coords
tile = (q, r)
if Board.is_on_board((q, r)):
neighbor = Hex.hex_neighbor((q, r), k)
# Check if clicked on 2-player board => distance 6
if Board.is_on_board(neighbor):
# exit if square is non-empty
if tile in Board.blocked:
return False
elif neighbor in Board.blocked:
return False
else:
distances_tile = [Hex.hex_distance(tile, pt[0][0:2]) for pt in Board.placed_tiles]
distances_other = [Hex.hex_distance(tile, Board.get_other_coord(pt)) for pt in Board.placed_tiles]
neighbor_tile = [Hex.hex_distance(neighbor, pt[0][0:2]) for pt in Board.placed_tiles]
neighbor_other = [Hex.hex_distance(neighbor, Board.get_other_coord(pt)) for pt in
Board.placed_tiles]
distances = distances_tile + distances_other + neighbor_tile + neighbor_other
if min(distances) > 1:
return False
else:
return True
def is_touching(a, b):
return Hex.hex_distance(a, b) == 1
def is_on_board(coord):
if Hex.hex_distance((0, 0), coord) > 6:
return False
else:
return True
def get_distance(h, s=(0, 0)):
return Hex.hex_distance(s, h)