public static void Paths(Bee bees)
{
string path = "p: ";
foreach (UInt32 vertex in bees.path)
{
path += vertex.ToString() + " ";
}
Console.WriteLine(path);
Console.WriteLine();
}
public static void CheckBestBee(Bee bee)
{
List <UInt32> p = bee.path;
p.Sort();
string lista = "p: ";
foreach (UInt32 node in bee.path)
{
lista += node.ToString() + " ";
}
Console.WriteLine(lista);
}
public static void Solve(Graph graph, UInt32 bees, UInt32 iterations, int steps)
{
/*List<UInt32> bestPath = new List<UInt32>();
* double newPath = 0;
*
*
*
* for (int k = 0; k < graph.dimension; k++)
* {
* bestPath.Add((UInt32)k);
* }
* double bestPathLength = graph.CalculateRouteLength(bestPath);
* Console.WriteLine("Best path is: " + bestPathLength);
* //Values.toFile.Add("-First best-" + 0 + "-" + bestPathLength);
* Values.AddNewValues(0, bestPathLength);*/
double bestPath;
for (int i = 0; i < iterations; i++)
{
Bee[] hive = new Bee[bees];
Bee bestBee = new Bee(graph);
for (int b = 0; b < hive.Length; b++)
{
hive[b] = new Bee(graph);
}
int epochs = 0;
while (!bestBee.IsComplete(graph))
{
//forward
int h = 0;
foreach (Bee bee in hive)
{
bee.ChooseNextNode(steps, graph, rand);
//Console.WriteLine("Bee nr {0} path count {1}", h, bee.path.Count);
h++;
}
//backward
hive = hive.OrderBy(c => c.pathValue).ToArray();
bestBee = hive[0];
double cMax = hive[0].pathValue;
double cMin = hive[hive.Length - 1].pathValue;
List <Bee> recruiters = new List <Bee>();
foreach (Bee bee in hive)
{
double ob = (cMax - bee.pathValue) / (cMax - cMin);
double probs = Math.Pow(Math.E, (-(1 - ob) / (bee.path.Count * 0.01)));
double r = rand.NextDouble();
if (r > probs)
{
bee.ChangeStatus(true);
recruiters.Add(bee);
}
else
{
bee.ChangeStatus(false);
}
}
if (recruiters.Count == 0)
{
//int l = hive.Length / 3;
for (int l = 0; l < hive.Length; l++)
{
hive[l].ChangeStatus(true);
recruiters.Add(hive[l]);
}
}
double divider = 0;
List <double> pr = new List <double>();
foreach (Bee bee in recruiters)
{
divider += (cMax - bee.pathValue) / (cMax - cMin);
}
foreach (Bee bee in recruiters)
{
pr.Add((cMax - bee.pathValue) / (cMax - cMin) / divider);
}
List <double> cumulativeProbs = new List <double>();
for (int x = 0; x < pr.Count; x++)
{
double cumPr = 0;
for (int y = x + 1; y < pr.Count; y++)
{
cumPr += pr[y];
cumulativeProbs.Add(cumPr);
}
}
foreach (Bee bee in hive)
{
if (!bee.status)
{
double rndm = rand.NextDouble();
Bee selectedBee = new Bee(graph);
selectedBee = recruiters[0];
for (int k = 0; k < cumulativeProbs.Count; k++)
{
if (rndm < cumulativeProbs[k])
{
selectedBee = recruiters[k];
break;
}
}
//bee.path.Clear();
bee.SetPath(selectedBee.path);
bee.ChangeStatus(true);
}
}
//Console.WriteLine("-----{0}", bestBee.path.Count);
epochs++;
if (bestBee.IsComplete(graph))
{
//CheckBestBee(bestBee);
//Console.WriteLine("Solve in {0} epochs", epochs);
Console.WriteLine("--Best path in iteration {0} is: {1}", i, bestBee.pathValue);
Values.AddNewValues(i, bestBee.pathValue);
//Console.WriteLine();
}
}
bestBee = new Bee(graph);
for (int l = 0; l < hive.Length; l++)
{
hive[l] = new Bee(graph);
}
}
}
