def move(self, game_clock):
if game_clock % (config.predator_speed() + 1) == 0:
return
if self.wait_time > 0:
self.wait_time -= 1
return
anim = self.__closest_animat()
if anim is None:
coord = None # No prey in sight
else:
coord = anim.position # anim is in sight
current_state = self.sense_state(anim)
current_action = self.qlearn.choose_action(current_state)
if current_action[0] == Action.SignalForHelp:
self.signal = True
if current_action[0] == Action.TowardsEasyPrey or current_action[0] == Action.TowardsHardPrey \
or current_action[0] == Action.TowardsSignal or current_action[0] == Action.SignalForHelp:
coord = normalise_distance(
distance_diff(self.position, coord, config.predator_range()), config.predator_range())
else:
coord = random_walk()
while grid.singleton_grid.is_obstacle(coord):
coord = random_walk()
grid.singleton_world.move_animat(self, coord)
def __closest_animat(self):
closest_animats = grid.singleton_world.around_point(self.position, config.predator_range())
for level in closest_animats:
for block in level:
for anim in block:
if isinstance(anim, Predator) and anim.signal is True:
return anim
for anim in block:
if isinstance(anim, EPrey) or isinstance(anim, HPrey):
return anim # Return the anim object which is closest
return None
