AdjustFitnesses()
{
float total = 0;
for (int i = 0; i < m_vecMembers.Count; i++)
{
CGenome member = m_vecMembers[i];
float fitness = member.Fitness();
if (m_iAge < _params.YoungAgeThreshold)
{
fitness *= _params.YoungFitnessBonus;
}
else if (m_iAge > _params.OldAgeThreshold)
{
fitness *= _params.OldAgePenalty;
}
total += fitness;
// Calculation of fitness sharing
float adjustedFitness = fitness / m_vecMembers.Count;
member.SetAdjustedFitness(adjustedFitness);
}
}
AddMember(CGenome genome)
{
if (genome.Fitness() > m_dBestFitness)
{
m_dBestFitness = genome.Fitness();
m_iGensWithoutImproving = 0;
m_Leader = genome;
}
m_vecMembers.Add(genome);
/*
* m_vecMembers.Sort(delegate (CGenome a, CGenome b) {
* return b.Fitness().CompareTo(a.Fitness());
* });*/
}
CSpecies(CGenome leader, int speciesID)
{
m_vecMembers = new List <CGenome> ();
m_iSpeciesID = speciesID;
m_dBestFitness = leader.Fitness();
m_Leader = leader;
m_vecMembers.Add(leader);
}
TournamentSelection(int numSelections)
{
double bestFitness = 0;
CGenome best = m_Population[0];
for (int i = 0; i < numSelections; i++)
{
CGenome genome = m_Population[Random.Range(0, m_Population.Count)];
if (genome.Fitness() > bestFitness)
{
best = genome;
bestFitness = genome.Fitness();
}
}
return(best);
}
DetermineBestParent(CGenome mum, CGenome dad)
{
if (mum.Fitness() == dad.Fitness())
{
if (mum.NumGenes() == dad.NumGenes())
{
if (Random.value < 0.5)
{
return(ParentType.Mum);
}
else
{
return(ParentType.Dad);
}
}
else
{
/*
* Choose the parent with the fewest genes because
* the fitness is the same.
*/
if (mum.NumGenes() < dad.NumGenes())
{
return(ParentType.Mum);
}
else
{
return(ParentType.Dad);
}
}
}
else
{
if (mum.Fitness() > dad.Fitness())
{
return(ParentType.Mum);
}
else
{
return(ParentType.Dad);
}
}
}
SpawnLeaders(List <CGenome> newPopulation)
{
for (int i = 0; i < m_vecSpecies.Count; i++)
{
CSpecies species = m_vecSpecies[i];
CGenome baby = species.Leader();
Debug.Log("spawning leader (" + baby.Fitness() + "): " + baby.ID() + " for " + species.ID());
newPopulation.Add(baby);
}
return(newPopulation.Count);
}
