public void Mutate(Genotype genotype, MutationResults results)
{
// We require a synapse to split
if (genotype.SynapseCount == 0)
{
return;
}
// Pick a synapse at random
var synapseIndex = Random.Range(0, genotype.SynapseCount);
var synapseGene = genotype.SynapseGenes.ElementAt(synapseIndex);
// Generate an innovation id for the operation
var innovationId = innovations.GetNeuronInnovationId(
synapseGene.fromNeuronId,
synapseGene.toNeuronId,
synapseGene.InnovationId
);
// If the genotype already contains the innovation id, bail
if (genotype.Contains(innovationId))
{
return;
}
var neuronGene = NeuronGene.Random(innovationId);
var neuronGenes = new GeneList <NeuronGene>(genotype.NeuronGenes);
neuronGenes.Add(neuronGene);
genotype.NeuronGenes = neuronGenes;
var synapseGenes = new GeneList <SynapseGene>(genotype.SynapseGenes);
var synapseGene1 = new SynapseGene(innovationId + 0,
synapseGene.fromNeuronId,
neuronGene.InnovationId,
true, 0.5f);
synapseGenes.Add(synapseGene1);
var synapseGene2 = new SynapseGene(innovationId + 1,
neuronGene.InnovationId,
synapseGene.toNeuronId,
true, 0.5f);
synapseGenes.Add(synapseGene2);
genotype.SynapseGenes = synapseGenes;
results.addedNeurons += 1;
results.addedSynapses += 2;
}
public void Mutate(Genotype genotype, MutationResults results)
{
var innovationIds = genotype.NeuronGenes.InnovationIds;
for (int i = 0; i < innovationIds.Count; i++)
{
if (Random.value < p)
{
var innovationId = innovationIds[i];
genotype.NeuronGenes[innovationId] = NeuronGene.Random(innovationId);
results.replacedNeurons++;
}
}
}
public static NeuronGene FromPrototype(NeuronGene other)
{
return(NeuronGene.Random(other.InnovationId));
}