public Organism[] Solve(bool prune)
{
var leaderboard = new Leaderboard(5, prune);
var organisms = new List <Organism>();
var generations = 0;
for (int i = 0; i < 50; i++)
{
Organism organism = new Organism(this, problem);
organisms.Add(organism);
leaderboard.AddOrganism(organism);
}
if (includedOrganisms != null)
{
foreach (var organism in includedOrganisms.Select(i => i.Clone(this)))
{
organisms.Add(organism);
leaderboard.AddOrganism(organism);
}
}
var best = default(Organism);
var worst = default(Organism);
var bestCost = double.MaxValue;
var worstCost = 0d;
var newBest = false;
while (generations < 2000)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
generations++;
newBest = false;
foreach (var organism in organisms)
{
organism.Tick();
leaderboard.AddOrganism(organism);
if (organism.Solution.CostTotal < bestCost)
{
bestCost = organism.Solution.CostTotal;
best = organism;
newBest = true;
}
if (organism.Solution.CostTotal > worstCost)
{
worstCost = organism.Solution.CostTotal;
worst = organism;
}
}
if (RandomHelper.GetShort(10) == 1)
{
organisms.Remove(worst);
Organism clone = best.Clone(this);
organisms.Add(clone);
}
else if (RandomHelper.GetShort(30) == 1)
{
organisms.Remove(worst);
var index = RandomHelper.GetShort(organisms.Count);
Organism clone = organisms[index].Clone(this);
organisms.Add(clone);
}
else if (RandomHelper.GetShort(100) == 1)
{
organisms.Remove(worst);
int index = RandomHelper.GetShort(organisms.Count);
Organism mother = best;
Organism father = organisms[index];
Organism child = mother.MakeCrossOver(father);
organisms.Add(child);
}
worst = null;
worstCost = 0d;
if (newBest)
{
Console.WriteLine(generations + ": Current (" + bestCost + ", " + best.Solution.IncompletenessPenalty + "): " + best.ToString());
}
}
Console.WriteLine("Done.");
return(leaderboard.GetBest());
}