public static DVRP Parse(string input)
{
if (String.IsNullOrWhiteSpace(input))
{
throw new ArgumentException(input);
}
var instance = new DVRP();
var lines = input.Split(new[] { '\n' });
for (int i = 0; i < lines.Length; i++)
{
string[] split = DVRPHelper.SplitText(lines[i]);
switch (split[0])
{
case "VRPTEST":
instance.FormatVersionNumber = split[1];
break;
case "COMMENT":
instance.Comment += lines[i].Substring(9, lines[i].Length - 9).Trim(new Char[] { ' ', '\r' }); // split[j] + " ";
break;
case "NAME":
instance.Name = split[1];
break;
case "NUM_DEPOTS":
instance.NumDepots = int.Parse(split[1]);
instance.Depots = new Depot[instance.NumDepots];
break;
case "NUM_CAPACITIES":
instance.NumCapacities = int.Parse(split[1]);
break;
case "NUM_VISITS":
instance.NumVistis = int.Parse(split[1]);
instance.Clients = new Client[instance.NumVistis];
instance.ClientID = new int[instance.NumVistis];
break;
case "NUM_LOCATIONS":
instance.NumLocations = int.Parse(split[1]);
instance.Locations = new Location[instance.NumLocations];
break;
case "NUM_VEHICLES":
instance.NumVehicles = int.Parse(split[1]);
break;
case "CAPACITIES":
instance.Capacities = int.Parse(split[1]);
break;
//case "DATA_SECTION":
case "DEPOTS":
for (int j = 0; j < instance.NumDepots; j++)
{
instance.Depots[j] = new Depot();
instance.Depots[j].depotID = int.Parse(lines[++i]);
}
break;
case "DEMAND_SECTION":
for (int j = 0; j < instance.NumVistis; j++)
{
instance.Clients[j] = new Client();
string[] clientsSplit = DVRPHelper.SplitText(lines[++i]);
instance.Clients[j].visitID = int.Parse(clientsSplit[0]);
instance.Clients[j].size = int.Parse(clientsSplit[1]);
instance.ClientID[j] = j;//int.Parse(clientsSplit[0]);
}
break;
case "LOCATION_COORD_SECTION":
for (int j = 0; j < instance.NumLocations; j++)
{
instance.Locations[j] = new Location();
string[] locationsSplit = DVRPHelper.SplitText(lines[++i]);
instance.Locations[j].locationID = int.Parse(locationsSplit[0]);
instance.Locations[j].x = int.Parse(locationsSplit[1]);
instance.Locations[j].y = int.Parse(locationsSplit[2]);
}
break;
case "DEPOT_LOCATION_SECTION":
for (int j = 0; j < instance.NumDepots; j++)
{
string[] depotLocationsSplit = DVRPHelper.SplitText(lines[++i]);
int depotId = int.Parse(depotLocationsSplit[0]);
instance.Depots.First(x => x.depotID == depotId).locationID = int.Parse(depotLocationsSplit[1]);
}
break;
case "VISIT_LOCATION_SECTION":
for (int j = 0; j < instance.NumVistis; j++)
{
string[] clientsSplit = DVRPHelper.SplitText(lines[++i]);
int visitId = int.Parse(clientsSplit[0]);
instance.Clients.First(x => x.visitID == visitId).locationID = int.Parse(clientsSplit[1]);
}
break;
case "DURATION_SECTION":
for (int j = 0; j < instance.NumVistis; j++)
{
string[] clientsSplit = DVRPHelper.SplitText(lines[++i]);
int visitId = int.Parse(clientsSplit[0]);
instance.Clients.First(x => x.visitID == visitId).unld = double.Parse(clientsSplit[1]);
}
break;
case "DEPOT_TIME_WINDOW_SECTION":
for (int j = 0; j < instance.NumDepots; j++)
{
string[] depotLocationsSplit = DVRPHelper.SplitText(lines[++i]);
int depotId = int.Parse(depotLocationsSplit[0]);
Depot d = instance.Depots.First(x => x.depotID == depotId);
d.start = double.Parse(depotLocationsSplit[1]);
d.end = double.Parse(depotLocationsSplit[2]);
}
break;
//COMMENT: TIMESTEP: 7
case "TIME_AVAIL_SECTION":
for (int j = 0; j < instance.NumVistis; j++)
{
string[] clientsSplit = DVRPHelper.SplitText(lines[++i]);
int visitId = int.Parse(clientsSplit[0]);
instance.Clients.First(x => x.visitID == visitId).time = double.Parse(clientsSplit[1]);
}
break;
case "EOF":
break;
}
}
instance.distances = new double[instance.Locations.Length, instance.Locations.Length];
for (int j = 0; j < instance.Locations.Length; j++)
{
for (int k = 0; k < instance.Locations.Length; k++)
{
instance.distances[j, k] = DVRPHelper.Distance(instance.Locations[j], instance.Locations[k]);
}
}
return(instance);
}
public void FindCycle(int v, int k, double pathLen, double time, double capacity)
{
if (pathLen >= bestPathLen || time > dvrp.Depots[0].end)
{
return;
}
if (k == depth)
{
double distToDepot = DVRPHelper.Distance(act_cycle[act_cycle.Count - 1], act_cycle[0]);
double timeToDepot = distToDepot / dvrp.Speed;
if (pathLen + distToDepot < bestPathLen && time + timeToDepot < dvrp.Depots[0].end)
{
bestPathLen = pathLen + distToDepot;
act_cycle.Add(dvrp.Locations[dvrp.Depots[0].locationID]);
best_cycle = new List <Location>(act_cycle);
arrivalTimes.Add(time + timeToDepot);
bestArrivalsTimes = new List <double>(arrivalTimes);
act_cycle.RemoveAt(act_cycle.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
}
return;
}
for (int i = 0; i < clientsId.Length; i++)
{
if (!used[i])
{
used[i] = true;
if (capacity + dvrp.Clients[clientsId[i]].size > 0)
{
double dist = dvrp.distances[v, dvrp.Clients[clientsId[i]].locationID];
double t = dist / dvrp.Speed;
double tWait = 0;//czas oczekiwania na przyjscie zgłoszenia
if (dvrp.Clients[clientsId[i]].time < cutOff * dvrp.Depots[0].end && time < dvrp.Clients[clientsId[i]].time)
{
tWait = dvrp.Clients[clientsId[i]].time - time;
}
arrivalTimes.Add(time + t + tWait);
act_cycle.Add(dvrp.Locations[dvrp.Clients[clientsId[i]].locationID]);
FindCycle(dvrp.Locations[dvrp.Clients[clientsId[i]].locationID].locationID, k + 1, pathLen + dist, time + t + tWait + dvrp.Clients[clientsId[i]].unld, capacity + dvrp.Clients[clientsId[i]].size);
act_cycle.RemoveAt(act_cycle.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
}
else if (capacity + dvrp.Clients[clientsId[i]].size == 0)
{
double distToClient = dvrp.distances[v, dvrp.Clients[clientsId[i]].locationID];
double timeToClient = distToClient / dvrp.Speed;
double tWait = 0;//czas oczekiwania na przyjscie zgłoszenia
if (dvrp.Clients[clientsId[i]].time < cutOff * dvrp.Depots[0].end && time < dvrp.Clients[clientsId[i]].time)
{
tWait = dvrp.Clients[clientsId[i]].time - time;
}
arrivalTimes.Add(time + timeToClient + tWait);
double distToDepot = dvrp.distances[dvrp.Clients[clientsId[i]].locationID, dvrp.Depots[0].locationID];
double timeToDepot = distToDepot / dvrp.Speed;
arrivalTimes.Add(time + timeToClient + tWait + dvrp.Clients[clientsId[i]].unld + timeToDepot);
act_cycle.Add(dvrp.Locations[dvrp.Clients[clientsId[i]].locationID]);
act_cycle.Add(dvrp.Locations[dvrp.Depots[0].locationID]);
depth++;
FindCycle(0, k + 2, pathLen + distToClient + distToDepot, time + timeToClient + tWait + dvrp.Clients[clientsId[i]].unld + timeToDepot, dvrp.Capacities);
depth--;
act_cycle.RemoveAt(act_cycle.Count - 1);
act_cycle.RemoveAt(act_cycle.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
}
else
{
double distCD = 0; // distance from prev client to depot
double distDC = 0; //disttance from depot to client
if (act_cycle.Count > 0)
{
distCD = dvrp.distances[act_cycle[act_cycle.Count - 1].locationID, dvrp.Depots[0].locationID];
}
distDC = dvrp.distances[dvrp.Depots[0].locationID, dvrp.Clients[clientsId[i]].locationID];
double tCD = distCD / dvrp.Speed;
arrivalTimes.Add(time + tCD);
double tDC = distDC / dvrp.Speed;
double tWait = 0;//czas oczekiwania na przyjscie zgłoszenia
if (dvrp.Clients[clientsId[i]].time < cutOff * dvrp.Depots[0].end && time < dvrp.Clients[clientsId[i]].time)
{
tWait = dvrp.Clients[clientsId[i]].time - time;
}
arrivalTimes.Add(time + tCD + tDC + tWait);
act_cycle.Add(dvrp.Locations[dvrp.Depots[0].locationID]);
depth++;
act_cycle.Add(dvrp.Locations[dvrp.Clients[clientsId[i]].locationID]);
FindCycle(dvrp.Clients[clientsId[i]].locationID, k + 2, pathLen + distCD + distDC, time + tCD + tDC + tWait, dvrp.Capacities + dvrp.Clients[clientsId[i]].size);
depth--;
act_cycle.RemoveAt(act_cycle.Count - 1);
act_cycle.RemoveAt(act_cycle.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
arrivalTimes.RemoveAt(arrivalTimes.Count - 1);
}
used[i] = false;
}
}
}
