I'm trying to run a pedestrian simulation from sumo in omnet++. To keep it easy (i am a beginner) I decided to use the Erlangen example provided with veins and extend it with a couple of pedestrians. I added the pedestrians in sumo and ran it. It works perfectly fine: You can see the pedestrians and cars in this picture
Next I was trying to run the whole thing in omnet++. I also managed to do that but the pedestrians were not shown. Just the cars. I read these two topics:
- Communication between a car and a pedestrian in Veins
- Veins Multiple Applications in multiples Vehicle types
and added these lines into the omnetpp.ini of the example:
*.manager.moduleType = "vtype0=org.car2x.veins.nodes.Car ped_pedestrian=org.car2x.veins.nodes.Pedestrian"
*.manager.moduleName = "vtype0=carNode ped_pedestrian=pedestrianNode"
*.manager.moduleDisplayString = "vtype0=carNode ped_pedestrian=pedestrianNode"
I also changed every appearance of "node" in omnetpp.ini to "carNode" and created new entries for "pedestrianNode" and I duplicated the Car.ned file and changed the file name to Pedestrian.ned and the module name to "Pedestrian". Then I ran the whole thing again but nothing changed except that the cars' image (as shown in the simulation) changed to a grey box.
Why are the pedestrians not shown? (Did I miss something?) Do I have to tell veins (or sumo) to communicate pedestrian positions to omnet++? Why did the icon of the cars in the simulation change to a grey box?
Here are the files that I added/modified:
Edit:
I researched the TraCI definition and debugged the [source code of veins]. I found these lines of code where subscriptions are done:
{
// subscribe to list of departed and arrived vehicles, as well as simulation time
simtime_t beginTime = 0;
simtime_t endTime = SimTime::getMaxTime();
std::string objectId = "";
uint8_t variableNumber = 7;
uint8_t variable1 = VAR_DEPARTED_VEHICLES_IDS;
uint8_t variable2 = VAR_ARRIVED_VEHICLES_IDS;
uint8_t variable3 = commandInterface->getTimeStepCmd();
uint8_t variable4 = VAR_TELEPORT_STARTING_VEHICLES_IDS;
uint8_t variable5 = VAR_TELEPORT_ENDING_VEHICLES_IDS;
uint8_t variable6 = VAR_PARKING_STARTING_VEHICLES_IDS;
uint8_t variable7 = VAR_PARKING_ENDING_VEHICLES_IDS;
TraCIBuffer buf = connection->query(CMD_SUBSCRIBE_SIM_VARIABLE, TraCIBuffer() << beginTime << endTime << objectId << variableNumber << variable1 << variable2 << variable3 << variable4 << variable5 << variable6 << variable7);
processSubcriptionResult(buf);
ASSERT(buf.eof());
}
{
// subscribe to list of vehicle ids
simtime_t beginTime = 0;
simtime_t endTime = SimTime::getMaxTime();
std::string objectId = "";
uint8_t variableNumber = 1;
uint8_t variable1 = ID_LIST;
TraCIBuffer buf = connection->query(CMD_SUBSCRIBE_VEHICLE_VARIABLE, TraCIBuffer() << beginTime << endTime << objectId << variableNumber << variable1);
processSubcriptionResult(buf);
ASSERT(buf.eof());
}
I compared that to the TraCI documentation on the sumo wiki:
* the first block for simulation subscriptions: https://sumo.dlr.de/wiki/TraCI/Simulation_Value_Retrieval
* the second block of code for vehicle subscription: https://sumo.dlr.de/wiki/TraCI/Vehicle_Value_Retrieval
It seems to me that pedestrians are not included there since the persons/pedestrians have a different api (https://sumo.dlr.de/wiki/TraCI/Person_Value_Retrieval) which is not listed on the subscription page (https://sumo.dlr.de/wiki/TraCI/Object_Variable_Subscription).
Is there something I missed in the source code of veins where person subscription is done?
Is it even possible to subscribe to persons in TraCI?
