public Node SwapGenome(Node from, Node to, int fromIndex, int toIndex)
{
_currentExplorationCount = 0;
InteractingNode = null;
Random r = new Random();
TargetIndex = fromIndex;
Mode = TargetMode.Get;
VisitNode(from);
Node result = new Analyser().Analyse(new StringTokenizer(to.ToString()));
Mode = TargetMode.Set;
TargetIndex = toIndex;
VisitNode(result);
return(result);
}
private void CreateNextGeneration()
{
List <Node> nextGeneration = new List <Node>();
Node g = _currentGeneration.LastOrDefault();
for (int i = 0; i < PopulationSize; i += 2)
{
int pidx1 = RouletteSelection();
int pidx2 = RouletteSelection();
var parent1 = _currentGeneration[pidx1];
var parent2 = _currentGeneration[pidx2];
Node child1, child2;
if (_random.NextDouble() < CrossoverRate)
{
child1 = CrossOver(parent1, parent2);
child2 = CrossOver(parent2, parent1);
}
else
{
child1 = parent1;
child2 = parent2;
}
int nbTry = 0;
int maxTry = 10;
Node child1Backup = new Analyser().Analyse(new StringTokenizer(child1.ToString()));
Node child2Backup = new Analyser().Analyse(new StringTokenizer(child2.ToString()));
do
{
child1 = child1Backup;
_mutationVisitor.Mutate(ref child1);
nbTry++;
} while (nbTry < maxTry && (!NodeContainsVariable(child1, "A") || !NodeContainsVariable(child1, "B")));
if (nbTry == maxTry)
{
child1 = child1Backup;
}
nbTry = 0;
do
{
child2 = child2Backup;
_mutationVisitor.Mutate(ref child2);
nbTry++;
} while (nbTry < maxTry && (!NodeContainsVariable(child2, "A") || !NodeContainsVariable(child2, "B")));
if (nbTry == maxTry)
{
child2 = child2Backup;
}
nextGeneration.Add(child1);
nextGeneration.Add(child2);
}
if (g != null)
{
nextGeneration[0] = g;
}
_currentGeneration.Clear();
_currentGeneration.AddRange(nextGeneration);
}