From 80b7e32f47ad2f11ce2976972b061966ccf0dbf0 Mon Sep 17 00:00:00 2001
From: Mateusz <wirus006@gmail.com>
Date: Tue, 26 May 2020 23:44:56 +0200
Subject: [PATCH] generate list of traveling by GA

---
 .../GaTravelingForHerbs/GeneticAlgorithm.py   | 36 +++++++++++++++-
 src/AI/GaTravelingForHerbs/Traveling.py       | 43 ++++++++++++++++++-
 2 files changed, 77 insertions(+), 2 deletions(-)

diff --git a/src/AI/GaTravelingForHerbs/GeneticAlgorithm.py b/src/AI/GaTravelingForHerbs/GeneticAlgorithm.py
index 77a1416..31bab59 100644
--- a/src/AI/GaTravelingForHerbs/GeneticAlgorithm.py
+++ b/src/AI/GaTravelingForHerbs/GeneticAlgorithm.py
@@ -1,4 +1,38 @@
 from random import random, choice
 
 class GeneticAlgorithm:
-    pass
\ No newline at end of file
+    def __init__(self, firstPopulation, mutationProbability):
+        self.firstPopulation = firstPopulation
+        self.mutationProbability = mutationProbability
+
+    def selectionModel(self, generation):
+        max_selected = int(len(generation) / 10)
+        sorted_by_assess = sorted(generation, key=lambda x: x.fitness)
+        return sorted_by_assess[:max_selected]
+
+    def stopCondition(self, i):
+        return i == 100
+
+    def run(self):
+        population = self.firstPopulation
+        population.sort(key=lambda x: x.fitness)
+        populationLen = len(population)
+        i = 0
+        while True:
+            selected = self.selectionModel(population)
+            newPopulation = selected.copy()
+            while len(newPopulation) != populationLen:
+                child = choice(population).crossover(choice(population))
+                if random() <= self.mutationProbability:
+                    child.mutation()
+                newPopulation.append(child)
+
+            population = newPopulation
+            theBestMatch = min(population, key=lambda x: x.fitness)
+            print("Generation: {} S: {} fitness: {}".format(i, theBestMatch, theBestMatch.fitness))
+
+            i += 1
+            if self.stopCondition(i):
+                return theBestMatch
+
+
diff --git a/src/AI/GaTravelingForHerbs/Traveling.py b/src/AI/GaTravelingForHerbs/Traveling.py
index 33332a4..de3fea8 100644
--- a/src/AI/GaTravelingForHerbs/Traveling.py
+++ b/src/AI/GaTravelingForHerbs/Traveling.py
@@ -1,10 +1,51 @@
 from random import randint, sample
 from math import sqrt
 
+from src.AI.GaTravelingForHerbs.GeneticAlgorithm import GeneticAlgorithm
+
 START_COORD = [(6, 2)]
 END_COORD = [(10, 7)]
 COORDS = [(12, 2), (16, 2), (17, 5), (14, 7), (17, 17), (13, 17), (5, 15), (2, 9), (8, 5), (11, 10)]
 
+
 class Traveling:
     def __init__(self, coords):
-        self.coords = coords
\ No newline at end of file
+        self.coords = coords
+        self.fitness = self.evaluate()
+
+    def evaluate(self):
+        sum = 0
+        for i, c in enumerate(self.coords):
+            if i + 1 > len(self.coords) - 1:
+                break
+            nextCoord = self.coords[i + 1]
+            # calculate distance
+            sum += sqrt((nextCoord[0] - c[0]) ** 2 + (nextCoord[1] - c[1]) ** 2)
+        return sum
+
+    def crossover(self, element2: 'Element') -> 'Element':
+        childCoords = self.coords[1:int(len(self.coords) / 2)]
+        for coord in element2.coords:
+            if coord not in childCoords and coord not in END_COORD + START_COORD:
+                childCoords.append(coord)
+
+            if len(childCoords) == len(element2.coords):
+                break
+        return Traveling(START_COORD + childCoords + END_COORD)
+
+    def mutation(self):
+        first = randint(1, len(self.coords) - 2)
+        second = randint(1, len(self.coords) - 2)
+        self.coords[first], self.coords[second] = self.coords[second], self.coords[first]
+        self.fitness = self.evaluate()
+
+    def __repr__(self):
+        return str(self.coords)
+
+
+firstGeneration = [Traveling(START_COORD + sample(COORDS, len(COORDS)) + END_COORD) for _ in range(100)]
+mutationProbability = float(0.1)
+
+ga = GeneticAlgorithm(firstGeneration, mutationProbability)
+movementList = ga.run()
+