Hi Bart,
Here are some snippets. For getSubscriptionResults():
* auto sub_results = Vehicle::getSubscriptionResults(name.c_str());
for (auto r : sub_results) { pt_LogDbg("- Ego subscr result type 0x%x:
'%s'", r.first, r.second->getString().c_str()); }*
I'm using a context subscription really (only report within a specific
radius):
* libsumo::SubscriptionResults subscriptionResults; if
(prefLogSumoCalls) pt_Log("SUMO call:
Vehicle::getContextSubscriptionResults(%s)", name.c_str());
subscriptionResults =
Vehicle::getContextSubscriptionResults(name.c_str()); // Go through
results (parse) std::string entity_id; for (auto e : subscriptionResults)
{ entity_id = e.first; //pt_LogDbg("- Ego ctx subscr result type
'%s'", entity_id.c_str()); auto res = e.second; for (auto r : res) {
//pt_LogDbg(" - subscr result var 0x%x value '%s''", r.first,
r.second->getString().c_str()); switch (r.first) { case
libsumo::VAR_ANGLE: vehicle->angle =
ParseDouble(r.second->getString()); break; case
libsumo::VAR_POSITION3D:*
* // Convert string to Vector3-like struct
ParsePosition(r.second->getString(), vehicle->position); break;
case libsumo::VAR_TYPE: //pt_LogDbg("VAR_TYPE='%s'",
r.second->getString().c_str()); vehicle->type_sumo =
r.second->getString();*
* break;*
* //////////////// etc default: pt_LogWarn("Var 0x%x
is not parsed; fix the source", r.first); break; } } }*
Hope that helps,
Ruud
On Mon, Dec 4, 2023 at 11:35 PM T Eenachtacht via sumo-user <
[email protected]> wrote:
> 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
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>
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