/// <summary>
/// Find the same kind of gene in its genes, if there is one.
/// </summary>
public Gene GetGene(int innovationNb)
{
if (Genes == null)
{
return(null);
}
return(Genes.FirstOrDefault(x => x.InnovationNb == innovationNb));
}
public INode MutateAddNode()
{
int innovation = (int)RandomHelpers.GetRandomBiasingLow(
Genes.Min(g => g.Innovation), Genes.Max(g => g.Innovation)
);
IGene oldGene = Genes.FirstOrDefault(g => g.Innovation <= innovation);
if (oldGene == null)
{
oldGene = Genes[new Random().Next(Genes.Count)];
}
INode newNode = new Node(NodeType.Hidden);
// Disable the old connection
oldGene.IsExpressed = false;
// Add new connections
IGene newGeneIn = new Gene(
oldGene.NodeOut,
newNode,
GetNextInnovation(),
1
);
IGene newGeneOut = new Gene(
newNode,
oldGene.NodeIn,
GetNextInnovation(),
oldGene.Weight
);
Nodes.Add(newNode);
Genes.Add(newGeneIn);
Genes.Add(newGeneOut);
return(newNode);
}
/// <summary>
/// cut this Gene and those after
/// </summary>
/// <param name="gene"></param>
public void cut(Gene gene)
{
Genes.RemoveRange(Genes.FirstOrDefault(x => x == gene), Genes.Count);
}