def init_population(self, size):
"""Basic initialisation function for a random population of agents."""
population = list()
if self.heuristic_init:
heuristic_tour = self.get_heuristic_tour()
for _ in range(0, size):
population.append(FoodSource(heuristic_tour))
else:
for _ in range(0, size):
population.append(FoodSource())
self.population = population
def update(self, duration):
if self.age >= Settings.flower_adult_age:
return
self.age += duration
# Just became an adult, so create a new food source
if self.age >= Settings.flower_adult_age:
location = self.location + Settings.flower_food_source_offset
radius = Settings.flower_food_source_radius
weight = Settings.flower_food_source_weight
self.game.food_sources.append(
FoodSource(location=location,
radius=radius,
weight=weight,
level=Settings.flower_food_source_starting_level,
canvas=self.canvas))
# TODO: Tidy up?
for level in self.game.levels:
level.flock.obstacles.append(Obstacle(location, radius, 1))
def generate_candidate(current):
self.run_stats["calls_generate_candidate"] += 1
while True:
other = rng.choice(self.population)
if other != current:
break
new_tour = []
rnd_RC = rng.random()
rnd_PC = rng.random()
# open_tour, closed_tour = choose_subtour(current.tour, other.tour)
closed_tour, open_tour = choose_random_subtour(current.tour)
if rnd_RC <= self.p_reconnection:
new_tour = reconnect(open_tour, closed_tour)
elif rnd_PC <= self.p_correction_perturbation:
new_tour = perturb(open_tour, closed_tour)
else:
new_tour = correct(open_tour, closed_tour)
return FoodSource(new_tour)
def create_foodsource(self):
solution = self.generate_solution(1)
fitness = self.fitness(solution)
return FoodSource(solution, fitness)
def create_foodsource(self):
solution = self.candidate_solution(self.fn_lb, self.fn_ub)
fitness = self.fitness(solution)
return FoodSource(solution, fitness)