64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
#include "GeneticAlgorithm.h"
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#include <iostream>
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#include <vector>
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Solution* GeneticAlgorithm::algorithm()
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{
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std::cout << "Running genetic algorithm\n";
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Solution* best = (*(this->population))[0];
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float bestFitness = this->fitness(best);
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int nPop = this->population->size();
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for (int gen = 0; gen < this->generations; gen++)
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{
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std::cout << "Generation " << gen << "\n";
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std::cout << "Population size: " << nPop << "\n";
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// Fitness
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std::vector<float> scores {};
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for (Solution* individual : *(this->population))
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{
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//individual->print();
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float fitness = this->fitness(individual);
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scores.push_back(fitness);
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if (fitness > bestFitness)
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{
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best = individual;
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bestFitness = fitness;
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}
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}
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// Selection
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Solutions* children = new Solutions {};
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for (int i = 0; i < nPop; i += 2)
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{
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Solution* p1 = this->selection(this->population, &scores);
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Solution* p2 = this->selection(this->population, &scores);
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std::cout << "Selected parents 1 and 2 \n";
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if (p1 == nullptr || p2 == nullptr)
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throw std::runtime_error("Failed to do selection");
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Solution* c1 = NULL;
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Solution* c2 = NULL;
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// Crossover
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std::cout << "Doing crossover\n";
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this->crossover(this->rCross, p1, p2, &c1, &c2);
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if (c1 == nullptr || c2 == nullptr)
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throw std::runtime_error("Failed to do crossover");
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// Mutation
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std::cout << "Mutating c1\n";
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this->mutate(c1, rMut);
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std::cout << "Mutating c2\n";
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this->mutate(c2, rMut);
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children->push_back(c1);
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children->push_back(c2);
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}
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this->population = children;
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}
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return best;
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}
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