/// <summary>
/// Mutates the genome by creating a new connection.
/// </summary>
public void Mutate_Link()
{
//Get first node to connect. It is random.
NodeGene nodeGene_a = NodeGenes.RandomValue(Random).Take(1).ElementAt(0);
IEnumerable <NodeGene> temp_subset = NodeGenes.Values.Where(a => a.NodeGenePattern.X > nodeGene_a.NodeGenePattern.X);
if (temp_subset.Count() == 0)
{
return; //TODO handle this too
}
NodeGene nodeGene_b = temp_subset.ElementAt(Random.Next(temp_subset.Count())); //Get a random gene with a higher X value.
ConnectionGene connectionGene = Pedigree.Create_ConnectionGene(nodeGene_a, nodeGene_b, Pedigree.Mutation_WeightRandom * (Random.NextDouble() * 2 - 1),
true);
if (ConnectionGenes.ContainsKey(connectionGene.ConnectionGenePattern.InnovationNumber)) //Can only happen if it already existed in the tracker.
{
return; //TODO think of how to handle this, maybe have a retry somewhere?
}
ConnectionGenes.Add(connectionGene.ConnectionGenePattern.InnovationNumber, connectionGene);
}