| 17 | } |
| 18 | |
| 19 | void GeneticAlgo::crossover(net::NeuralNet mom, net::NeuralNet dad, net::NeuralNet *offspring1, net::NeuralNet *offspring2) { |
| 20 | float crossoverDeterminer = (float)rand() / (float)RAND_MAX; |
| 21 | if(crossoverDeterminer > crossoverRate) { |
| 22 | *offspring1 = mom; |
| 23 | *offspring2 = dad; |
| 24 | return; |
| 25 | } |
| 26 | |
| 27 | std::vector<double> offspring1Weights; |
| 28 | std::vector<double> offspring2Weights; |
| 29 | std::vector<double> momWeights = mom.getWeights(); |
| 30 | std::vector<double> dadWeights = dad.getWeights(); |
| 31 | |
| 32 | /// Crossover index must be a minimum of 1 and a maxiumum of the second to last index of the weights |
| 33 | int crossoverIndex = (rand() % (momWeights.size() - 2)) + 1; |
| 34 | |
| 35 | for(int a = 0; a < crossoverIndex; a++) { |
| 36 | offspring1Weights.push_back(momWeights[a]); |
| 37 | offspring2Weights.push_back(dadWeights[a]); |
| 38 | } |
| 39 | for(unsigned int a = crossoverIndex; a < momWeights.size(); a++) { |
| 40 | offspring1Weights.push_back(dadWeights[a]); |
| 41 | offspring2Weights.push_back(momWeights[a]); |
| 42 | } |
| 43 | |
| 44 | *offspring1 = net::NeuralNet(mom); |
| 45 | offspring1->setWeights(offspring1Weights); |
| 46 | *offspring2 = net::NeuralNet(dad); |
| 47 | offspring2->setWeights(offspring2Weights); |
| 48 | |
| 49 | std::vector<double>().swap(offspring1Weights); |
| 50 | std::vector<double>().swap(offspring2Weights); |
| 51 | std::vector<double>().swap(momWeights); |
| 52 | std::vector<double>().swap(dadWeights); |
| 53 | } |
| 54 | |
| 55 | void GeneticAlgo::mutate(net::NeuralNet *net) { |
| 56 | std::vector<double> weights = net->getWeights(); |
nothing calls this directly
no test coverage detected