public Phenotype(Neat neat, NeatChromosome chromosome, InnovationCacher currentGeneration)
{
_layerMap = new Dictionary <int, IList <NeatNeuron> >();
_neat = neat;
Chromosome = chromosome;
MutateAndBuild(currentGeneration);
}
private void MutateAndBuild(InnovationCacher currentGeneration)
{
if (ShouldAddConnection())
{
BuildFromGenes();
AddRandomConnection(currentGeneration);
}
else
{
if (ShouldAddNeuron())
{
AddRandomNeuron(currentGeneration);
}
else
{
ShuffleWeights();
}
BuildFromGenes();
}
}
private void AddRandomNeuron(InnovationCacher currentGeneration)
{
var randGene = GetRandomEnabledGene();
var index = Chromosome.NeuronCount;
var g1 = new NeatGene(_neat, randGene.From, index);
g1.Weight = 1.0;
g1.Recursive = randGene.Recursive;
currentGeneration.AssignHistory(g1);
var g2 = new NeatGene(_neat, index, randGene.To);
g2.Weight = randGene.Weight;
g2.Recursive = randGene.Recursive;
currentGeneration.AssignHistory(g2);
randGene.Enabled = false;
Chromosome.AppendGene(g1);
Chromosome.AppendGene(g2);
}
private void AddRandomConnection(InnovationCacher currentGeneration)
{
var neuronPair = GetTwoUnconnectedNeurons();
var fromNeuron = neuronPair[0];
var toNeuron = neuronPair[1];
var newConnectionGene = new NeatGene(_neat, _neurons.IndexOf(fromNeuron), _neurons.IndexOf(toNeuron));
if (fromNeuron.Layer > toNeuron.Layer)
{
if (!_neat.Structure.AllowRecurrentConnections)
{
throw new Exception("Illegal recurrent connection");
}
newConnectionGene.Recursive = true;
}
currentGeneration.AssignHistory(newConnectionGene);
var inConnection = new NeatNeuron.Connection();
inConnection.Recursive = newConnectionGene.Recursive;
inConnection.Neuron = fromNeuron;
inConnection.Weight = newConnectionGene.Weight;
toNeuron.Connections.Add(inConnection);
var outConnection = new NeatNeuron.Connection();
outConnection.Recursive = newConnectionGene.Recursive;
outConnection.Neuron = toNeuron;
outConnection.Weight = newConnectionGene.Weight;
outConnection.OutGoing = true;
fromNeuron.Connections.Add(outConnection);
Chromosome.AppendGene(newConnectionGene);
CategorizeNeuronsIntoLayers();
}
public SpeciesManager(Neat neat)
{
_neat = neat;
_innovationCacher = new InnovationCacher();
_species = new List <Species>();
}