private void Mutate(IGenome genome, double soften = 1)
{
if (new Random().NextDouble() < GenerationParameters.MutateAddNodeProbability / Math.Max(soften, 1))
{
genome.MutateAddNode();
}
else if (new Random().NextDouble() < GenerationParameters.MutateAddGeneProbability / Math.Max(soften, 1))
{
genome.MutateAddGene(Population.Genomes.SelectMany(g => g.Genes));
}
else
{
if (new Random().NextDouble() < GenerationParameters.MutateAllGeneWeightsProbability)
{
genome.MutateGeneWeights(GeneMutationType.AdjustWeight, GeneParameters.MutateGeneWeightFactor, 1);
}
if (new Random().NextDouble() < GenerationParameters.MutateGeneExpressionProbability)
{
genome.MutateGeneExpression();
}
if (new Random().NextDouble() < GenerationParameters.MutateGeneReExpressionProbability)
{
genome.MutateGeneReExpress();
}
IGene geneCandidate = genome.Genes[new Random().Next(genome.Genes.Count)];
if (new Random().NextDouble() < GenerationParameters.MutateGeneWeightProbability)
{
geneCandidate.MutateWeight(GeneMutationType.AdjustWeight, GeneParameters.MutateGeneWeightFactor);
}
}
}
public void Spawn(int size, IGenome initialGenome = null)
{
IGenome genome = initialGenome ?? new Genome(numberOfInputs, numberOfOutputs);
if (initialGenome == null)
{
genome.MutateGeneWeights(GeneMutationType.ReplaceWeight, 1, 1);
}
Genomes = Enumerable.Range(0, size).Select(i => genome.Copy()).ToList();
}