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s481904 2024-06-07 13:03:38 +02:00
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import numpy as np
import random
import pygame
from constant import width, height, size, rows, cols
from board import Board
from tractor import Tractor
routes_num = 20 # Ilość ścieżek
board = Board()
dirt_positions = board.get_dirt_positions()
dirt_count = len(dirt_positions)
def manhattan(a, b):
return abs(a[0] - b[0]) + abs(a[1] - b[1])
def find_routes(routes_num):
population_set = [] # zapisujemy trasy - losowe ułóżenia
for i in range(routes_num):
# losowo wygenerowane kolejności na trasie
single_route = np.random.choice(list(range(dirt_count)), dirt_count, replace=False)
population_set.append(single_route)
return np.array(population_set)
def sum_up_for_route(route_indices):
sum = 0
for i in range(len(route_indices) - 1):
current_dirt = dirt_positions[route_indices[i]]
next_dirt = dirt_positions[route_indices[i + 1]]
sum += manhattan(current_dirt, next_dirt)
return sum
def routes_sum(population_set): # zapisujemy na liście finalne sumy odległości dla każdej z opcji tras
list_of_sums = np.zeros(routes_num)
for i in range(routes_num):
list_of_sums[i] = sum_up_for_route(population_set[i]) # wywołujemy dla każdej trasy na liście
return list_of_sums
def calculate_fitness(distances):
# Odwrotność odległości jako fitness
# Dodajemy małą wartość (np. 1) aby uniknąć dzielenia przez zero
return 1 / (distances + 1)
def selection(population_set, list_of_sums):
# Oblicz wartości fitness dla każdej trasy
fitness_values = calculate_fitness(list_of_sums)
# Normalizuj wartości fitness, aby sumowały się do 1 (wymagane dla np.random.choice)
probabilities = fitness_values / fitness_values.sum()
# Wybierz rodziców na podstawie prawdopodobieństw (wartości fitness)
progenitor_indices_a = np.random.choice(range(len(population_set)), len(population_set), p=probabilities, replace=True)
progenitor_indices_b = np.random.choice(range(len(population_set)), len(population_set), p=probabilities, replace=True)
# Wybierz rzeczywiste trasy
progenitor_a = population_set[progenitor_indices_a]
progenitor_b = population_set[progenitor_indices_b]
return np.array([progenitor_a, progenitor_b])
def one_point_crossover(parent_a, parent_b): #krzyzowanie jednopunktowe
crossover_point = np.random.randint(1, len(parent_a))
child = np.concatenate((parent_a[:crossover_point], [x for x in parent_b if x not in parent_a[:crossover_point]]))
return child
def population_mating(progenitor_list):
new_population_set = []
for i in range(len(progenitor_list[0])):
progenitor_a, progenitor_b = progenitor_list[0][i], progenitor_list[1][i]
child = one_point_crossover(progenitor_a, progenitor_b)
new_population_set.append(child)
return new_population_set
def mutation_of_child(child):
for i in range(dirt_count): # dla każdego elementu dajemy losową szansę zamiany int *rate
x = np.random.randint(0, dirt_count)
y = np.random.randint(0, dirt_count)
child[x], child[y] = child[y], child[x] # zamiana miejscami
return child
'''def mutation_of_child(child, mutation_rate=0.1):#procent moze pomoc w niezaklucaniu trasy gdy jesy duza trasa ale idk
num_mutations = int(len(child) * mutation_rate)
for _ in range(num_mutations):
x = np.random.randint(0, len(child))
y = np.random.randint(0, len(child))
child[x], child[y] = child[y], child[x]
return child'''
def mutate_population(new_population_set):
final_mutated_population = []
for child in new_population_set:
final_mutated_population.append(mutation_of_child(child)) # dodajemy zmutowane dziecko do finalnej listy
return final_mutated_population
if __name__ == '__main__':
population_set = find_routes(routes_num)
list_of_sums = routes_sum(population_set)
progenitor_list = selection(population_set, list_of_sums)
new_population_set = population_mating(progenitor_list)
final_mutated_population = mutate_population(new_population_set)
final_route = [-1, np.inf, np.array([])] # format listy
for i in range(20):
list_of_sums = routes_sum(final_mutated_population)
# zapisujemy najlepsze rozwiązanie
if list_of_sums.min() < final_route[1]:
final_route[0] = i
final_route[1] = list_of_sums.min()
final_route[2] = np.array(final_mutated_population)[list_of_sums.min() == list_of_sums]
progenitor_list = selection(population_set, list_of_sums)
new_population_set = population_mating(progenitor_list)
final_mutated_population = mutate_population(new_population_set)
print(f"Najlepsza trasa znaleziona w iteracji: {final_route[0]}")
print(f"Minimalna suma odległości: {final_route[1]}")
print(f"Kolejne pola: {final_route[2]}")