[sumo-user] getSubscriptionResults in libtraci / C++

[T Eenachtacht <t188012021@xxxxxxxxx>]

Dear All,

    Does anyone have
      experience, or can send a link to documentation, on how to process
      results from a subscription in C++ using libtraci? I need to
      convert the following from Python into C++. The subscription is
      for multiple types of variables. (not only VAR_ARRIVED_VEHICLES_IDS).

In Python the implementation is rather straightforward with the documentation (e.g. in https://sumo.dlr.de/docs/TraCI/Interfacing_TraCI_from_Python.html).

results = traci.simulation.getSubscriptionResults()

for vehicle_id in results[tc.VAR_ARRIVED_VEHICLES_IDS]:

# process vehicle_id

This can be converted to C++ like this:

libsumo::TraCIResults results = libtraci::Simulation::getSubscriptionResults();

//std::map<int, std::shared_ptr<libsumo::TraCIResult> > libsumo::TraCIResults

for (auto entry : results) {

int i = entry.first;

shared_ptr<libsumo::TraCIResult> result = entry.second;

How can the TraCIResults be filtered for ' libsumo::VAR_ARRIVED_VEHICLES_ID' values, and

how to get the id values from the result?

Thanks for the help,

Bart Netten