//public static double timer = 0;
public void NextStep()
{
var sw = Stopwatch.StartNew();
//if (IsSolutionCompleted)
// throw new Exception("There's no available cities to next movement");
StepNumber++;
Path bestPath = null;
double bestSolution = double.MaxValue;
for (int i = 0; i < Bats.Count; i++)
{
var bat = Bats[i];
var tPath = new Path(bat.Path);
bat.NextCity(Setting.CostMatrix, bat.V);
int dst = tPath.HammingDistance(BestPath);
dst = Math.Max(dst, 2);
bat.V = BatProblem.Random.Next(1, dst);
bat.SetPath(bat.Path.TwoOpt());
double rand = BatProblem.Random.NextDouble();
if (rand > bat.R)
{
Bat bestBat = Bats[0];
for (int j = 1; j < i; j++)
{
if (Bats[j].Cost < bestBat.Cost)
{
bestBat = Bats[j];
}
var tempPath = bestBat.Path.SelfOrWithOpt(Setting.CostMatrix);
bat.SetPath(tempPath);
bat.Cost = bat.Path.GetCost(Setting.CostMatrix);
}
}
double curSolution = Function(bat.Path);
if (bestPath == null || curSolution <= bestSolution)
{
bestPath = bat.Path;
bestSolution = curSolution;
bat.R = Setting.InitialR * (1 - Math.Exp(-StepNumber * Setting.Gamma));
bat.A = Setting.Alpha * bat.A;
}
}
BestPath = bestPath;
BestCost = bestSolution;
//if (StepNumber == N + 1)
// IsSolutionCompleted = true;
//timer += sw.ElapsedMilliseconds / 1000.0;
}
//public bool IsSolutionCompleted { get; private set; } = false;
public Swarm(SwarmSetting setting)
{
Setting = setting;
N = setting.CostMatrix.GetLength(0);
for (int i = 0; i < setting.SwarmSize; i++)
{
var b = new Bat(0, N)
{
A = (double)BatProblem.Random.Next(700, 1000) / 1000.0,
R = BatProblem.Random.NextDouble(),
V = 1,
};
Bats.Add(b);
}
BestPath = new Path();
BestPath.Cities.Add(0);
}
