public CPPNNEATGenome(ICPPNNEATGA parentGA, CPPNNEATGenome <PType> parent, CPPNNEATGenome <PType> partner)
: this(parentGA)
{
var differences = new DifferenceAnalysis(parent.GeneCollection, partner.GeneCollection);
var disjointAndExcessSource = differences.FirstCollection;
if (partner.Score > parent.Score)
{
disjointAndExcessSource = differences.SecondCollection;
}
else if (partner.Score == parent.Score)
{
disjointAndExcessSource = (MathExtensions.RandomNumber() <= 0.5) ? differences.FirstCollection :
differences.SecondCollection;
}
Func <CPPNNEATLinkGene, CPPNNEATLinkGene, Complex> weightSelector = null;
if (MathExtensions.RandomNumber() <= parentGA.MateByAveragingRate)
{
weightSelector = (first, second) => (first.Weight + second.Weight) / 2;
}
else
{
weightSelector = (first, second) => (MathExtensions.RandomNumber() <= 0.5) ? first.Weight : second.Weight;
}
foreach (var match in differences.Matches)
{
var geneToCopy = match.FirstCollection;
var newGene = geneToCopy.Copy();
newGene.Enabled = true;
newGene.Weight = weightSelector(match.FirstCollection, match.SecondCollection);
GeneCollection.TryAddLinkGene(newGene);
if ((!match.FirstCollection.Enabled || !match.SecondCollection.Enabled) &&
MathExtensions.RandomNumber() <= parentGA.DisableGeneRate)
{
GeneCollection.DisableLinkGene(newGene.InnovationNumber);
}
}
foreach (var linkGene in disjointAndExcessSource
.Disjoint.Union(disjointAndExcessSource.Excess))
{
GeneCollection.TryAddLinkGene(linkGene.Copy());
}
}
private static double GetAverageFunctionDifference(CPPNNEATGenome <PType> genome1,
CPPNNEATGenome <PType> genome2)
{
var functionDifferenceMap = genome1.GeneCollection.ActivationFunctions.GroupBy(func => func.Label)
.ToDictionary(group => group.Key, group => group.Count());
foreach (var activationFunctionGroup in genome2.GeneCollection.ActivationFunctions.GroupBy(func => func.Label))
{
if (!functionDifferenceMap.ContainsKey(activationFunctionGroup.Key))
{
functionDifferenceMap[activationFunctionGroup.Key] = 0;
}
functionDifferenceMap[activationFunctionGroup.Key] =
Math.Abs(functionDifferenceMap[activationFunctionGroup.Key] -
activationFunctionGroup.Count());
}
return(functionDifferenceMap.Average(pair => pair.Value));
}