internal GeneticAlgorithm(
IMutator <T> mutator,
ICrossOver <T> crossOver,
IPopulationCreator <T> populationCreator,
int populationSize,
double mutationProbability,
int maxGenerations,
int eliteSize,
double solutionPrecision,
Func <T[], int> fitnessFunction)
{
this.mutator = mutator;
this.crossOver = crossOver;
this.populationCreator = populationCreator;
this.populationSize = populationSize;
this.mutationProbability = mutationProbability;
this.fitnessFunction = fitnessFunction;
this.maxGenerations = maxGenerations;
this.eliteSize = eliteSize;
this.solutionPrecision = solutionPrecision;
}
/// <summary>
/// Creates a new population.
/// </summary>
/// <param name="population">The current population.</param>
/// <param name="elite">The elite operator.</param>
/// <param name="mutate">The mutate operator.</param>
/// <param name="crossover">The crossover operator.</param>
/// <param name="diversify">The diversify operator.</param>
/// <returns></returns>
public Population CreateNewPopulation(Population population, IElite elite, IMutate mutate, ICrossOver crossover, IDiversify diversify)
{
IChromosome parent1, parent2;
IChromosome child1 = null, child2 = null;
// create a new population
var nextPopulation = new Population();
// copy all elites to the new population
elite?.Process(population, nextPopulation);
// make sure the population is diversified enough
diversify?.Process(nextPopulation, population.Count);
// while next population is not filled completely
while (nextPopulation.Count < population.Count)
{
// select 2 parents
DoTournament(population, out parent1, out parent2);
// perform crossover so we get 2 children
crossover?.Process(parent1, parent2, out child1, out child2);
// mutate both children
mutate?.Process(child1);
mutate?.Process(child2);
// and add the children to the next population
nextPopulation.Add(child1);
if (nextPopulation.Count < population.Count)
{
nextPopulation.Add(child2);
}
}
return(nextPopulation);
}
/// <summary>
/// Adds the specified crossover operator
/// </summary>
/// <param name="elite">The crossover operator</param>
public void Add(ICrossOver crossover)
{
_crossover = crossover;
}
