/// <summary>
/// Breed
/// </summary>
private void Breed()
{
// Logs Setup
int weightMutationNb = 0;
int addConnectionNb = 0;
int addNodeNb = 0;
int enableDisableConnectionNb = 0;
_mutationLogs = "";
while (_nextEvaluationGenomes.Count() < _config.populationSize)
{
Genome child = null;
Genome mom = null;
Genome dad = null;
// Get Child
Species species = null;
int maxToKeep = ((_config.populationSize * _config.percentageToKeep) / 100) - 1;
if (_config.species)
{
species = GetRandomSpecies(_r);
}
if (_config.crossover)
{
if (species != null)
{
mom = GetRandomGenome(species, _r);
dad = GetRandomGenome(species, _r);
}
else
{
mom = _genomes[UnityEngine.Random.Range(0, maxToKeep)];
dad = _genomes[UnityEngine.Random.Range(0, maxToKeep)];
}
// Crossover between Mom & Dad
child = mom.Fitness >= dad.Fitness ? Genome.Crossover(mom, dad, _r, _config.disabledConnectionInheritChance) : Genome.Crossover(dad, mom, _r, _config.disabledConnectionInheritChance);
}
else
{
child = species != null ? new Genome(GetRandomGenome(species, _r)) : new Genome(_genomes[UnityEngine.Random.Range(0, maxToKeep)]);
}
// Weights Mutation
if ((float)_r.NextDouble() < _config.mutationRate)
{
child.WeightsMutation(_r);
weightMutationNb++;
}
if (_config.genomeMutations)
{
// Add Connection Mutation
if ((float)_r.NextDouble() < _config.addConnectionRate)
{
// If for Logs
if (child.AddConnectionMutation(_r, _connectionInnovation, 10))
{
addConnectionNb++;
}
}
// Add Node Mutation
if ((float)_r.NextDouble() < _config.addNodeRate)
{
child.AddNodeMutation(_r, _connectionInnovation, _nodeInnovation);
addNodeNb++;
}
// Enable/Disable a Random Connection
if ((float)_r.NextDouble() < _config.enableDisableRate)
{
// If for Logs
if (child.EnableOrDisableRandomConnection())
{
enableDisableConnectionNb++;
}
}
}
// Add Child to Next Evaluation Genomes
_nextEvaluationGenomes.Add(child);
}
_mutationLogs += string.Format(
"Weights Mutation: {0}, Add Connection: {1}, Add Node: {2}, Enable/Disable Connection: {3}\nCrossover is {4}, Genome Mutations is {5}, Species is {6}",
weightMutationNb,
addConnectionNb,
addNodeNb,
enableDisableConnectionNb,
_config.crossover,
_config.genomeMutations,
_config.species
);
_genomes.Clear();
_genomes = new List <Genome>(_nextEvaluationGenomes);
_nextEvaluationGenomes = new List <Genome>();
}
/// <summary>
/// Breed
/// </summary>
private Genome Breed(Genome mom = null, Genome dad = null)
{
Genome child = null;
// Get Child
if (dad != null && mom != null)
{
// Crossover between Mom & Dad
if (mom.Fitness >= dad.Fitness)
{
child = Genome.Crossover(mom, dad, _r, _config.disabledConnectionInheritChance);
}
else
{
child = Genome.Crossover(dad, mom, _r, _config.disabledConnectionInheritChance);
}
}
else
{
int maxToKeep = ((_currentPop * _config.percentageToKeep) / 100) - 1;
mom = _genomes[UnityEngine.Random.Range(0, maxToKeep)];
dad = _genomes[UnityEngine.Random.Range(0, maxToKeep)];
// Crossover between Mom & Dad
if (mom.Fitness >= dad.Fitness)
{
child = Genome.Crossover(mom, dad, _r, _config.disabledConnectionInheritChance);
}
else
{
child = Genome.Crossover(dad, mom, _r, _config.disabledConnectionInheritChance);
}
}
// Weights Mutation
if ((float)_r.NextDouble() < _config.mutationRate)
{
child.WeightsMutation(_r);
}
if (_config.genomeMutations)
{
// Add Connection Mutation
if ((float)_r.NextDouble() < _config.addConnectionRate)
{
child.AddConnectionMutation(_r, _connectionInnovation, 10);
}
// Add Node Mutation
if ((float)_r.NextDouble() < _config.addNodeRate)
{
child.AddNodeMutation(_r, _connectionInnovation, _nodeInnovation);
}
// Enable/Disable a Random Connection
if ((float)_r.NextDouble() < _config.enableDisableRate)
{
child.EnableOrDisableRandomConnection();
}
}
return(child);
}