public static int CompareTo(FitnessGenome one, FitnessGenome two)
{
if (one.fitness > two.fitness)
{
return(1);
}
else if (one.fitness < two.fitness)
{
return(-1);
}
return(0);
}
// Runs one generation
public void Evaluate()
{
// Reset everything for next generation
foreach (Species s in species)
{
s.Reset(random);
}
fitnessMap.Clear();
speciesMap.Clear();
nextGenGenomes.Clear();
highestFitness = float.MinValue;
fittestGenome = null;
int count1 = 0;
int count2 = 0;
// Place genomes into species
foreach (Genome g in genomes)
{
count1++;
bool foundSpecies = false;
foreach (Species s in species)
{
count2++;
if (Genome.CompatibilityDistance(g, s.mascot, C1, C2, C3) < DT)
{ // compatibility distance is less than DT, so genome belongs to this species
s.members.Add(g);
speciesMap[g] = s;
foundSpecies = true;
break;
}
}
if (!foundSpecies)
{ // if there is no appropiate species for genome, make a new one
Species newSpecies = new Species(g);
species.Add(newSpecies);
Debug.Log("New species created. Species amount: " + species.Count + ", g.Nodes.Count = " + g.Nodes.Count);
speciesMap[g] = newSpecies;
}
}
// Remove unused species
//using(IEnumerator<Species> sEnumerator = species.GetEnumerator())
//{
// while (sEnumerator.MoveNext())
// {
// Species s = sEnumerator.Current;
// if (!s.members.Any())
// {
// sEnumerator
// }
// }
//}
foreach (Species s in species.ToList())
{
if (!s.members.Any())
{
species.Remove(s);
}
}
// Evaluate genomes and assign score
foreach (Genome g in genomes)
{
Species s = speciesMap[g]; // Get species of the genome
float score = evaluateGenome(g); // fitness of Genome
float adjustedScore = score / speciesMap[g].members.Count;
s.AddAdjustedFitness(adjustedScore);
s.fitnessPop.Add(new FitnessGenome(g, adjustedScore));
fitnessMap[g] = adjustedScore;
if (score > highestFitness)
{
highestFitness = score;
fittestGenome = g;
}
}
// put best genome from each species into next generation
// species = species.OrderByDescending(s => s.fitnessPop).ToList();
foreach (Species s in species)
{
float bestFitness = 0;
FitnessGenome fittestInSpecies = new FitnessGenome();
foreach (FitnessGenome fit in s.fitnessPop)
{
if (fit.fitness > bestFitness)
{
fittestInSpecies = fit;
bestFitness = fit.fitness;
}
}
if (fittestInSpecies.genome.Nodes.Count != 0)
{
// Debug.Log("OMG, g.Nodes.Count == 0 row 224");
nextGenGenomes.Add(fittestInSpecies.genome);
}
}
// Breed the rest of the genomes
while (nextGenGenomes.Count < populationSize)
{ // replace removed genomes by randomly breeding
Species s = getRandomSpeciesBiasedAjdustedFitness(random);
Genome p1 = getRandomGenomeBiasedAdjustedFitness(s, random);
Genome p2 = getRandomGenomeBiasedAdjustedFitness(s, random);
Genome child = new Genome();
if (fitnessMap[p1] >= fitnessMap[p2])
{
child.Crossover(p1, p2);
}
else
{
child.Crossover(p2, p1);
}
if (random.NextDouble() < MUTATION_RATE)
{
child.Mutation();
}
if (random.NextDouble() < ADD_CONNECTION_RATE)
{
//Debug.Log("Adding connection mutation...");
child.AddConnectionMutation(connectionInnovation, 10);
}
if (random.NextDouble() < ADD_NODE_RATE)
{
//Debug.Log("Adding node mutation...");
child.AddNodeMutation(nodeInnovation, connectionInnovation);
}
nextGenGenomes.Add(child);
}
genomes = nextGenGenomes;
nextGenGenomes = new List <Genome>();
}
public void Evaluate(float[] scores)
{
// reset everything
foreach (Species s in species)
{
s.ResetSpecies(new System.Random());
}
scoreMap.Clear();
speciesMap.Clear();
nextGenGenomes.Clear();
highestScore = float.MinValue;
fittestGenome = null;
// place genomes into species
foreach (Genome g in genomes)
{
bool foundSpecies = false;
foreach (Species s in species)
{
if (Genome.CompatibilityDist(g, s.mascot, c1, c2, c3) < dt)
{
s.members.Add(g);
speciesMap.Add(g, s);
foundSpecies = true;
break;
}
}
if (!foundSpecies) // make new species
{
Species newSpecies = new Species(g);
species.Add(newSpecies);
speciesMap.Add(g, newSpecies);
}
}
// remove dead species
foreach (Species s in species.ToList())
{
if (s.members.Count == 0)
{
species.Remove(s);
}
}
if (species.Count > 11)
{
dt += 0.04f;
ConsoleLogger.Log("dt: " + dt.ToString());
}
else if (species.Count < 9)
{
dt -= 0.04f;
ConsoleLogger.Log("dt: " + dt.ToString());
}
ConsoleLogger.Log("No. species: " + species.Count.ToString());
// evaluate genomes and assign fitness
foreach (Genome g in genomes)
{
Species s = speciesMap[g];
float score = scores.ToList()[genomes.IndexOf(g)];
float adjustedScore = score / speciesMap[g].members.Count;
s.AddAdjustedFitness(adjustedScore);
s.fitnessPop.Add(new FitnessGenome(g, adjustedScore));
scoreMap.Add(g, adjustedScore);
if (score > highestScore)
{
highestScore = score;
fittestGenome = g;
}
}
// put best genomes from species into next generation
foreach (Species s in species)
{
// sort genomes by fitness
s.fitnessPop.Sort(FitnessGenomeComparator.CompareTo);
s.fitnessPop.Reverse();
FitnessGenome fittestInSpecies = s.fitnessPop[0];
nextGenGenomes.Add(fittestInSpecies.genome);
}
Random rand = new Random();
// breed genomes
while (nextGenGenomes.Count < populationSize)
{
Species s = GetRandomSpeciesBiasedAdjustedFitness(rand);
Genome p1 = GetRandomGenomeBiasedAdjustedFitness(s, rand);
if (rand.NextDouble() < _INTER_SPECIES_RATE)
{
s = GetRandomSpeciesBiasedAdjustedFitness(rand);
}
Genome p2 = GetRandomGenomeBiasedAdjustedFitness(s, rand);
Genome child;
if (scoreMap[p1] >= scoreMap[p2])
{
child = Genome.Crossover(p1, p2);
}
else
{
child = Genome.Crossover(p2, p1);
}
if (rand.NextDouble() < _MUTATION_RATE)
{
child.ValueMutation();
}
if (rand.NextDouble() < _ADD_CONONECTION_RATE)
{
child.AddConnectionMutation();
}
if (rand.NextDouble() < _ADD_NODE_RATE)
{
child.AddNodeMutation();
}
nextGenGenomes.Add(child);
}
genomes = nextGenGenomes;
nextGenGenomes = new List <Genome>();
}
public void EvaluateGeneration()
{
_lastGenerationResults.Clear();
_evaluatedGenomes.Clear();
for (int i = 0; i < _genomes.Count; i++)
{
var genome = _genomes[i];
var fitnessGenome = new FitnessGenome()
{
Fitness = EvaluateGenome(genome), Genome = genome
};
_evaluatedGenomes.Add(fitnessGenome);
}
//Sort Collections
_evaluatedGenomes = _evaluatedGenomes.OrderByDescending(g => g.Fitness).ToList();
_lastGenerationResults.AddRange(_evaluatedGenomes);
//kill the 9/10 worst genomes
var cutoffIndex = _evaluatedGenomes.Count / 10;
_evaluatedGenomes = _evaluatedGenomes.Take(cutoffIndex).ToList();
//find next generation population
_nextGeneration.Clear();
// save champ
var champion = _evaluatedGenomes.First();
FittestGenome = champion;
_nextGeneration.Add(champion.Genome);
while (_nextGeneration.Count() < _neatConfiguration.PopulationSize)
{
if (_random.NextDouble() > _neatConfiguration.ASexualReproductionRate)
{
var parent1 = _evaluatedGenomes[_random.Next(_evaluatedGenomes.Count)];
FitnessGenome parent2;
do
{
parent2 = _evaluatedGenomes[_random.Next(_evaluatedGenomes.Count)];
} while (parent2 == parent1);
Genome child;
if (parent1.Fitness > parent2.Fitness)
{
child = _crossFunctionStrategy.GenerateOffspring(parent1.Genome, parent2.Genome);
}
else
{
child = _crossFunctionStrategy.GenerateOffspring(parent2.Genome, parent1.Genome);
}
if (_random.NextDouble() < _neatConfiguration.MutationRate)
{
_weightMutation.Mutate(ref child);
}
if (_random.NextDouble() < _neatConfiguration.AddConnectionRate)
{
_addConnectionMutation.Mutate(ref child);
}
if (_random.NextDouble() < _neatConfiguration.AddNodeRate)
{
_addNodeMutation.Mutate(ref child);
}
_nextGeneration.Add(child);
}
else
{
var parent = _evaluatedGenomes[_random.Next(_evaluatedGenomes.Count)];
var child = parent.Genome.Copy();
_weightMutation.Mutate(ref child);
_nextGeneration.Add(child);
}
}
//Transfer next generation to current generation
_genomes.Clear();
_genomes.AddRange(_nextGeneration);
}