def ordered_crossover(mating_pool : list, offspring_len=1000) -> list: # aka (OX)
offspring = []
for i in range(0, offspring_len, 2):
parent_1 = random.choice(mating_pool)
parent_2 = random.choice(mating_pool)
#print("\nParents:")
#print([s.id for s in parent_1.route_stops])
#print([s.id for s in parent_2.route_stops])
route_len = len(parent_1.route_stops)
offspring_1 = Route(RouteManager.INSTANCE)
offspring_2 = Route(RouteManager.INSTANCE)
offspring_1.route_stops = [ None for s in parent_1.route_stops ]
offspring_2.route_stops = [ None for s in parent_1.route_stops ]
cutoff_1 = random.randrange(route_len + 1)
cutoff_2 = random.randrange(route_len + 1)
cut_start = min(cutoff_1, cutoff_2)
cut_end = max(cutoff_1, cutoff_2)
#print("Cuts:")
#print(cut_start, cut_end)
# Exchange the cutodd point
for i in range(cut_start, cut_end):
offspring_1.route_stops[i] = parent_1.route_stops[i]
offspring_2.route_stops[i] = parent_2.route_stops[i]
j_1 = cut_end % route_len
j_2 = cut_end % route_len
for i in range(route_len):
i_conv = (cut_end + i) % route_len
route_stop_1 = parent_1.route_stops[i_conv]
route_stop_2 = parent_2.route_stops[i_conv]
if not offspring_2.has_station(route_stop_1):
offspring_2.route_stops[j_2] = route_stop_1
j_2 = (j_2 + 1) % route_len
if not offspring_1.has_station(route_stop_2):
offspring_1.route_stops[j_1] = route_stop_2
j_1 = (j_1 + 1) % route_len
offspring_1.build_spf()
offspring_2.build_spf()
#print("Offspring:")
#print([s.id for s in offspring_1.route_stops])
#print([s.id for s in offspring_2.route_stops])
offspring.append(offspring_1)
offspring.append(offspring_2)
return offspring
