/// <summary>
/// This method needs to be called at the end of the <see cref="Evolve"/>
/// method.
/// </summary>
protected virtual void UpdateState()
{
// Update the best individual with the best fitness
BestIndividual = _population.OrderByDescending(c => c, _problem.FitnessComparer).First();
// Update generation counter
CurrentGeneration++;
// Update evolution time
var startDateTime = DateTime.Now;
EvolutionTime += DateTime.Now - startDateTime;
var oldState = _currentState;
_currentState = new GeneticAlgorithmState <T>()
{
BestIndividual = BestIndividual,
Generation = CurrentGeneration,
Evaluations = _problem.FitnessFunctionEvaluations,
ElapsedTime = EvolutionTime
};
RaiseStateChanged(oldState, _currentState);
UpdateStateAwareComponents();
}
private void RaiseStateChanged(
IGeneticAlgorithmState <T> oldState, IGeneticAlgorithmState <T> newState)
{
if (StateChanged != null)
{
StateChanged(this, new GeneticAlgorithmStateChangedEventArgs <T>(oldState, newState));
}
}
public GeneticAlgorithmStateChangedEventArgs(
IGeneticAlgorithmState oldState, IGeneticAlgorithmState newState)
{
OldState = oldState;
NewState = newState;
}
