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Add Optimization with Multiple Destinations

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Overview​

The example covers the following features:

  • Adding an optimization with multiple vehicles and different destination locations.
  • Defining orders with various fields (e.g., time windows, packages, weights).
  • Setting up multiple vehicles with specific constraints.
  • Displaying the optimized solution on a map.

In this optimization, multiple vehicles start their routes from a single departure point but end at different destinations, allowing for more flexible and efficient route planning.

When you run the example application:

  • An optimization is created and saved.
  • The optimized solution is returned and displayed on the map.

Create Customers and Orders​

Note

Each order must have a customer associated with it. You can either:

  • Create a new customer and assign it to the order.
  • Use an existing customer (refer to the Get Customer example).

Initializing and Adding Customers​

  1. Initialize a ProgressListener and vrp::Service.
  2. Create twelve vrp::Customer objects and set the desired fields, and add them to the database.
  3. Call the addCustomer() method from the vrp::Service using the vrp::Customer and ProgressListener and wait for the operation to be done.
ProgressListener listener;
gem::vrp::Service serv;

gem::vrp::Customer c0;
c0.setCoordinates(gem::Coordinates(48.234270, -2.133208));
c0.setAlias("c0");
c0.setPhoneNumber("+12312312");
c0.setEmail("c0@yahoo.com");
int ret = serv.addCustomer(&listener, c0);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c1;
c1.setCoordinates(gem::Coordinates(45.854137, 2.853998));
c1.setAlias("c1");
c1.setEmail("c1@yahoo.com");
c1.setPhoneNumber("+12312312");
ret = serv.addCustomer(&listener, c1);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c2(gem::Coordinates(46.199373, 0.069986));
c2.setAlias("c2");
c2.setPhoneNumber("+12312312");
c2.setEmail("c2@yahoo.com");
ret = serv.addCustomer(&listener, c2);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c3(gem::Coordinates(48.052503, 0.119726));
c3.setAlias("c3");
c3.setPhoneNumber("+12312312");
c3.setEmail("c3@yahoo.com");
ret = serv.addCustomer(&listener, c3);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c4(gem::Coordinates(44.346051, 4.694878));
c4.setAlias("c4");
c4.setPhoneNumber("+12312312");
c4.setEmail("c4@yahoo.com");
ret = serv.addCustomer(&listener, c4);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c5(gem::Coordinates(44.464582, 2.455020));
c5.setAlias("c5");
c5.setPhoneNumber("+12312312");
c5.setEmail("c5@yahoo.com");
ret = serv.addCustomer(&listener, c5);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c6(gem::Coordinates(48.656644, 5.907131));
c6.setAlias("c6");
c6.setPhoneNumber("+12312312");
c6.setEmail("c6@yahoo.com");
ret = serv.addCustomer(&listener, c6);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c7(gem::Coordinates(49.161539, 0.500580));
c7.setAlias("c7");
c7.setPhoneNumber("+12312312");
c7.setEmail("c7@yahoo.com");
ret = serv.addCustomer(&listener, c7);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c8(gem::Coordinates(47.702421, 3.384226));
c8.setAlias("c8");
c8.setPhoneNumber("+12312312");
c8.setEmail("c8@yahoo.com");
ret = serv.addCustomer(&listener, c8);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c9(gem::Coordinates(47.198274, 4.630011));
c9.setAlias("c9");
c9.setPhoneNumber("+12312312");
c9.setEmail("c9@yahoo.com");
ret = serv.addCustomer(&listener, c9);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c10(gem::Coordinates(49.655296, 2.243181));
c10.setAlias("c10");
c10.setPhoneNumber("+12312312");
c10.setEmail("c10@yahoo.com");
ret = serv.addCustomer(&listener, c10);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

gem::vrp::Customer c11(gem::Coordinates(50.719729, 2.160877));
c11.setAlias("c11");
c11.setPhoneNumber("+12312312");
c11.setEmail("c11@yahoo.com");
ret = serv.addCustomer(&listener, c11);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);

Initializing and Adding Orders​

  1. Create a vrp::OrderList and add orders to it. Each order must have a customer associated with it.
  2. Create twelve vrp::Order objects and associate one customer for each, set the desired fields, and add them to the database.
  3. Call the addOrder() method from the vrp::Service using the vrp::Order and ProgressListener and wait for the operation to be done.
gem::vrp::OrderList orders;
gem::vrp::Order order0(c0);
ret = serv.addOrder(&listener, order0, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order0);
gem::vrp::Order order1(c1);
ret = serv.addOrder(&listener, order1, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order1);
gem::vrp::Order order2(c2);
ret = serv.addOrder(&listener, order2, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order2);
gem::vrp::Order order3(c3);
ret = serv.addOrder(&listener, order3, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order3);
gem::vrp::Order order4(c4);
ret = serv.addOrder(&listener, order4, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order4);
gem::vrp::Order order5(c5);
ret = serv.addOrder(&listener, order5, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order5);
gem::vrp::Order order6(c6);
ret = serv.addOrder(&listener, order6, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order6);
gem::vrp::Order order7(c7);
ret = serv.addOrder(&listener, order7, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order7);
gem::vrp::Order order8(c8);
ret = serv.addOrder(&listener, order8, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order8);
gem::vrp::Order order9(c9);
ret = serv.addOrder(&listener, order9, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order9);
gem::vrp::Order order10(c10);
ret = serv.addOrder(&listener, order10, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order10);
gem::vrp::Order order11(c11);
ret = serv.addOrder(&listener, order11, false);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
orders.push_back(order11);

Configure Optimization Parameters​

Note

Configuration Parameters define key settings that influence the behavior of the route optimization process. These settings determine aspects such as optimization goals, search time limits, and flexibility in handling orders.

  1. Create a vrp::ConfigurationParameters object and set the desired parameters.
  2. Set the route type to RT_CustomEnd to allow vehicles to end their routes at different destinations.
gem::vrp::ConfigurationParameters configParams;
configParams.setRouteType(gem::vrp::ERouteType::RT_CustomEnd);

Create the Vehicle and Define Vehicle Constraints​

Initializing and Adding the Vehicle​

Note

Vehicles are the resources that will be used to fulfill the orders. Each vehicle can have specific constraints and capabilities.

  1. Create a vrp::VehicleList and add vehicles to it.
  2. Create two vrp::Vehicle objects and set the desired fields, such as name, type, status, and capacity.
  3. Call the addVehicle() method from the vrp::Service using the vrp::Vehicle and ProgressListener and wait for the operation to be done.
gem::vrp::VehicleList vehicles;
gem::vrp::Vehicle vehicle1;
vehicle1.setName("Vehicle 1");
vehicle1.setType(gem::vrp::EVehicleType::VT_Car);
vehicle1.setStatus(gem::vrp::EVehicleStatus::VS_Available);
vehicle1.setManufacturer("Kia");
vehicle1.setModel("Ceed");
vehicle1.setFuelType(gem::vrp::EFuelType::FT_GasolinePremium);
vehicle1.setConsumption(6.5);
vehicle1.setLicensePlate("BV01MGL");
vehicle1.setMaxWeight(350);
vehicle1.setMaxCube(10);
vehicle1.setStartTime(540); //9:00 AM in minutes
vehicle1.setEndTime(1800);   //3:00 AM (next day) in minutes

ret = serv.addVehicle(&listener, vehicle1);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
vehicles.push_back(vehicle1);

gem::vrp::Vehicle vehicle2;
vehicle2.setName("Vehicle 2");
vehicle2.setType(gem::vrp::EVehicleType::VT_Car);
vehicle2.setStatus(gem::vrp::EVehicleStatus::VS_Available);
vehicle2.setManufacturer("Kia");
vehicle2.setModel("Ceed");
vehicle2.setFuelType(gem::vrp::EFuelType::FT_GasolinePremium);
vehicle2.setConsumption(6.5);
vehicle2.setLicensePlate("BV02MGL");
vehicle2.setMaxWeight(350);
vehicle2.setMaxCube(10);
vehicle2.setStartTime(540); //9:00 AM in minutes
vehicle2.setEndTime(1800);   //3:00 AM (next day) in minutes

ret = serv.addVehicle(&listener, vehicle2);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 5000);
vehicles.push_back(vehicle2);

Define Vehicle Constraints​

Note

Vehicle constraints define the limitations and requirements applied to a vehicle during the route optimization process. Ensure that the vehicle operates within its capabilities, such as time windows, capacity, distance, and revenue.

  1. Create a vrp::VehicleConstraints object and set the desired constraints.
  2. Add these constraints to a vrp::VehicleConstraintsList.
gem::vrp::VehicleConstraintsList vehConstraintsList;
gem::vrp::VehicleConstraints vehConstr1;
vehConstr1.setStartDate(gem::Time(2020, 8, 7)); // August 7, 2020
vehConstr1.setMaxDistance(2000);
vehConstraintsList.push_back(vehConstr1);

Create Departure and Destinations​

Note

Departures define the starting points for vehicle routes, while destinations define the final stops. These locations play a key role in optimizing route efficiency.

  1. Create a vrp::Departure object for the vehicles' starting point.
  2. Create two vrp::Destination objects for the vehicles' ending points.
gem::vrp::Departure departure;
departure.setAlias("departure");
departure.setCoordinates(gem::Coordinates(48.618893, -1.353635));

gem::vrp::Destination destination1;
destination1.setAlias("destination 1");
destination1.setCoordinates(gem::Coordinates(47.617484, 1.152466));

gem::vrp::Destination destination2;
destination2.setAlias("destination 2");
destination2.setCoordinates(gem::Coordinates(48.286149, 1.248859));

Create the Optimization​

Note

An optimization represents a set of orders, vehicles, constraints, and other parameters that define a routing problem.

  1. Create a vrp::Optimization object.
  2. Assign the OrderList, ConfigurationParameters, VehicleList, VehicleConstraintsList, Departure, and Destinations to the optimization.
gem::vrp::Optimization optimization;
optimization.setOrders(orders);
optimization.setConfigurationParameters(configParams);
optimization.setVehicles(vehicles);
optimization.setDepartures({ departure });
optimization.setDestinations({ destination1, destination2 });
optimization.setVehiclesConstraints(vehConstraintsList); // the set of vehicle constraints from vehConstr1 will be applied on both vehicles

Displaying Orders on the Map​

Once the orders have been added, we can display them on the map.

Initialize Map Components​

  1. Create a MapServiceListener, OpenGLContext, and MapView.
MapViewListenerImpl mapListener;
auto oglContext = session.produceOpenGLContext(Environment::WindowFrameworks::Available, "AddOptimizationWithMultipleDestinations");
gem::StrongPointer<gem::MapView> mapView = gem::MapView::produce(oglContext, &mapListener);

Highlight Orders and Departures​

  1. Create a LandmarkList and CoordinatesList using the OrderList, Departure, and Destinations.
  2. Instruct the MapView to highlight the landmarks (orders, departure, and destinations).
  3. For better visibility, create a PolygonGeographicArea from the CoordinatesList, and center the MapView on this area.
gem::LandmarkList lmks;
gem::CoordinatesList coords;

for (int i = 0; i < optimization.getDepartures().size(); i++)
{
    gem::Landmark landmark;
    landmark.setName(optimization.getDepartures()[i].getAlias());
    landmark.setCoordinates(optimization.getDepartures()[i].getCoordinates());
    landmark.setImage(gem::Icon::Core::GreenBall);

    lmks.push_back(landmark);
    coords.push_back(optimization.getDepartures()[i].getCoordinates());
}

for (int i = 0; i < orders.size(); i++)
{
    gem::Landmark landmark;
    landmark.setName(orders[i].getAlias());
    landmark.setCoordinates(orders[i].getCoordinates());
    landmark.setImage(gem::Icon::Core::BlueBall);

    lmks.push_back(landmark);
    coords.push_back(orders[i].getCoordinates());
}

for (int i = 0; i < optimization.getDestinations().size(); i++)
{
    gem::Landmark landmark;
    landmark.setName(optimization.getDestinations()[i].getAlias());
    landmark.setCoordinates(optimization.getDestinations()[i].getCoordinates());
    landmark.setImage(gem::Icon::Core::RedBall);

    lmks.push_back(landmark);
    coords.push_back(optimization.getDestinations()[i].getCoordinates());
}

mapView->activateHighlight(lmks);
gem::PolygonGeographicArea polyArea(coords);
mapView->centerOnArea(polyArea);

ret = WAIT_UNTIL(std::bind(&MapViewListenerImpl::IsFinished, &mapListener), 15000);

Run the Optimization​

  1. Call the addOptimization() method from vrp::Service, passing the Optimization object and the ProgressListener.
  2. After the operation is finished, a solution for optimization will be generated. To view the solution, you need to call the getSolution method from the optimization, which will return a vrp::RouteList containing the optimization results.
std::shared_ptr<gem::vrp::Request> request = std::make_shared<gem::vrp::Request>();
ret = serv.addOptimization(&listener, optimization, request);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 10000);

WAIT_UNTIL([&]() {
    serv.getRequest(&listener, request, request->id);
    WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 7000);
    return request->status == gem::vrp::ERequestStatus::eFinished;
    }, 40000);

gem::vrp::RouteList routes;
ret = optimization.getSolution(&listener, routes);
WAIT_UNTIL(std::bind(&ProgressListener::IsFinished, &listener), 10000);

Display Routes on the Map​

Once the optimization is complete and a solution has been found, we can display the solution on the map.

  1. Ensure that the operation was done, and a solution was found.
  2. Create a MarkerCollection of type Polyline for each route.
  3. Add the route shapes to the MarkerCollection.
  4. Set the MarkerCollection in the map view preferences.
  5. After highlighting on the map, center the screen over the routes.
if (listener.IsFinished() && listener.GetError() == gem::KNoError && ret == gem::KNoError)
{
    std::cout << "Problem optimized successfully" << std::endl;
    PrintRoutesOnConsole(routes);

    gem::CoordinatesList shape0 = routes[0].getShape();
    gem::CoordinatesList shape1 = routes[1].getShape();

    // Display route shapes on map
    auto col1 = gem::MarkerCollection(gem::EMarkerType::MT_Polyline, "shape0");
    col1.add(gem::Marker(shape0));
    mapView->preferences().markers().add(col1);

    auto col2 = gem::MarkerCollection(gem::EMarkerType::MT_Polyline, "shape1");
    col2.add(gem::Marker(shape1));
    gem::MarkerCollectionRenderSettings markerCollDisplaySettings;
    markerCollDisplaySettings.polylineInnerColor = gem::Rgba(0, 0, 255, 0);
    mapView->preferences().markers().add(col2, markerCollDisplaySettings);

    ret = WAIT_UNTIL(std::bind(&MapViewListenerImpl::IsFinished, &mapListener), 15000);

    gem::CoordinatesList shapesCoordinates;
    shapesCoordinates.insert(shapesCoordinates.end(), shape0.begin(), shape0.end());
    shapesCoordinates.insert(shapesCoordinates.end(), shape1.begin(), shape1.end());

    gem::PolygonGeographicArea polyArea(shapesCoordinates);
    mapView->centerOnArea(polyArea);
    ret = WAIT_UNTIL(std::bind(&MapViewListenerImpl::IsFinished, &mapListener), 15000);

    WAIT_UNTIL_WINDOW_CLOSE();
}
else
    std::cout << "Problem couldn't be optimized" << std::endl;
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