public bool IsCompatible(IGenome genome)
{
// Calculate compatibility distance between the two genomes
GeneComparer comparer = new GeneComparer();
IEnumerable <IGene> matchingGenes = genome.Genes.Intersect(Genes, comparer);
if (matchingGenes.Count() == 0)
{
return(false);
}
double averageWeightDifference = matchingGenes.Average(g =>
Math.Abs(g.Weight - Genes.First(gs => gs.Innovation == g.Innovation).Weight)
);
IEnumerable <IGene> differingGenes = genome.Genes.Concat(Genes).Except(matchingGenes, comparer);
// Disjoint/Excess genes
IEnumerable <IGene> disjointGenes = differingGenes
.Where(dg => dg.Innovation < matchingGenes.Max(g => g.Innovation));
int disjointCount = disjointGenes.ToList().Count();
int excessCount = differingGenes.Except(disjointGenes, comparer).ToList().Count();
IGenome largestGenome = Size() >= genome.Size() ? this : genome;
int normalisation = largestGenome.Size() > GenomeParameters.GeneNormalisationThreshold ? largestGenome.Size() : 1;
double compatibilityDistance = ((disjointCount * GenomeParameters.DisjointGeneCompatibilityFactor) / normalisation) +
((excessCount * GenomeParameters.ExcessGeneCompatibilityFactor) / normalisation) +
(averageWeightDifference * GenomeParameters.AverageWeightDifferenceFactor);
return(compatibilityDistance < GenomeParameters.CompatibilityDistanceThreshold);
}
/// <summary>
/// Returns the Last gene in the chromosome.
/// Helper method that is typically used when Non-pheno type genes exist within the chromosome.
/// </summary>
/// <returns></returns>
public Gene FirstGene()
{
return(Genes.First());
}
T GetGeneValue <T>(string name) where T : struct
{
return(Genes.First(g => g.Name == name).Value.As <T>());
}