private Genome Crossover()
{
var mother = Genomes.GetRandomElement();
var father = Genomes.GetRandomElement();
while (father == mother)
{
father = Genomes.GetRandomElement();
}
if (mother.Fitness < father.Fitness)
{
var tmp = father;
father = mother;
mother = tmp;
}
var childGenome = new Genome();
foreach (var node in mother.NodeGenes.Values)
{
childGenome.AddNodeGene(new NodeGene(node));
}
foreach (var motherConnectionGene in mother.ConnectionGenes)
{
ConnectionGene newChildConnection;
var coinToss = RandomGenerator.GetCoinToss();
var connectionGeneId = motherConnectionGene.Key;
if (father.ConnectionGenes.ContainsKey(connectionGeneId))
{
if (coinToss)
{
newChildConnection = new ConnectionGene(motherConnectionGene.Value);
}
else
{
newChildConnection = new ConnectionGene(father.ConnectionGenes[connectionGeneId]);
}
}
else
{
newChildConnection = new ConnectionGene(motherConnectionGene.Value);
}
childGenome.AddConnectionGene(newChildConnection, connectionGeneId);
}
return(childGenome);
}
public Genome Breed()
{
Genome childGenome;
if (Genomes.Count > 1 && RandomGenerator.GetRandomResult(Config.CrossoverChance))
{
childGenome = Crossover();
}
else
{
childGenome = new Genome(Genomes.GetRandomElement());
}
childGenome.TryMutate();
return(childGenome);
}