public RecombinationOutput Recombine(Genotype a, Genotype b)
{
IList<Genotype> offsprings = new List<Genotype>();
int nbrChild = UnityEngine.Random.Range(minChild, maxChild);
for (var i = 0; i < nbrChild; ++i)
{
Genotype g = new Genotype();
Extension e;
// 50% chance to inherit the base extension from one of the parents.
if (Probability.Test(0.5))
e = a.Root;
else
e = b.Root;
g.Root = e.LocalClone();
recombinaison(g.Root, a.Root, b.Root);
// Mutations
if (Probability.Test(0.3))
{
Mutation mutation = new Mutation();
mutation.AddGeneticModifier(new Blur(new Set(new[] { "root" }, Set.Mode.Blacklist), new Set(new[] { "scale" }), 0.1f));
//mutation.AddGeneticModifier(new Addition(new Set(new[] { "Motor" }, Set.Mode.Whitelist), new Set(new[] { "scale" }), 2));
g.Mutate(mutation);
}
offsprings.Add(g);
}
return new RecombinationOutput(offsprings);
}
public void Evolve()
{
//Evolve pop
var newPopulation = new List <Genotype>();
//Breed using routlette wheel selection
for (int i = 0; i < Population.Count / 2; ++i)
{
var parent1 = RouletteWheelSelection(Population);
var parent2 = RouletteWheelSelection(Population);
//Crossover
Genotype offspring1 = parent1, offspring2 = parent2;
OnePointCrossover(parent1, parent2, ref offspring1, ref offspring2);
//Mutate offspring
offspring1.Mutate(mutationRate);
offspring2.Mutate(mutationRate);
offspring1.FixEndPoints();
offspring2.FixEndPoints();
newPopulation.Add(offspring1);
newPopulation.Add(offspring2);
}
//Maintain fittest from previous population.
newPopulation[0] = FittestGenotype();
//Regenerate lower portion of the population to preserve diversity
for (int i = newPopulation.Count - newPopulation.Count / 6; i < newPopulation.Count; i++)
{
newPopulation[i] = new Genotype();
}
Population = newPopulation;
foreach (Genotype g in Population)
{
Phenotype.CreatePhenotype(g);
}
currentGeneration++;
generationLabel.text = "Generation " + currentGeneration;
if (autosaveToggle && currentGeneration % autosaveGenerationInterval == 0)
{
string json = SavePopulation();
FileInfo file = new FileInfo(Application.persistentDataPath + "/" + sessionNameInputField.text + "/"
+ "autosavePopulation" + currentGeneration / autosaveGenerationInterval + ".json");
file.Directory.Create();
File.WriteAllText(file.FullName, json);
}
results.Clear();
internalTimer = 0.0f;
}