static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
TSPImage image = new TSPImage(IMAGE_WIDTH, IMAGE_HEIGHT);
Thread thread = new Thread(() => Solve(image));
thread.Start();
image.Display();
}
static void Solve(TSPImage image)
{
TSPCity[] cities = TSPTour.RandomCities(CITIES_COUNT, IMAGE_WIDTH, IMAGE_HEIGHT);
TSPTour initial = TSPTour.RandomTour(cities);
TSPStats results;
try {
results = SimulatedAnnealing.Solve(ANNEALING_PARAMETERS, initial, image);
image.DrawTour(results);
} catch (ObjectDisposedException e) {
// ignore window closed
}
}
public static TSPStats Solve(AnnealingParameters parms, IAnnealingSolution initial, TSPImage image)
{
IAnnealingSolution best, state, neighbor;
best = initial;
state = initial;
Random rand = new Random();
double heat = parms.Heat;
int iterations = 0;
while (heat > parms.MinHeat)
{
for (int i = 0; i < parms.Settle; i++)
{
iterations++;
if ((iterations % 10000) == 0)
{
Console.WriteLine("{0,4}: {1}", best.Score(), heat);
image.DrawTour(new TSPStats {
solution = best,
iterations = iterations,
working = true,
heat = heat,
});
}
neighbor = state.Neighbor();
if (neighbor.Score() < state.Score())
{
state = neighbor;
}
else if (rand.NextDouble() < Math.Exp((state.Score() - neighbor.Score()) / heat))
{
state = neighbor;
}
if (state.Score() < best.Score())
{
best = state;
}
}
heat *= parms.Alpha;
}
return(new TSPStats {
solution = best,
iterations = iterations,
working = false,
heat = heat,
});
}
