Re: [sumo-devel] Bus stops/people in TraCI

[Jakob E. <nam...@go...>]

Hello,

> 1) I understand the command VAR_BUS_STOP_WAITING is supposed to return the number of people waiting at a bus stop. On inspecting the code, it seems that people are not waiting at bus stops, but on edges, therefore this command always returns 0. Is there a solution to this (e.g., adding a command to retrieve the number of people waiting on an edge, updating MSPerson to add waiting people to a stop)?

Retrieving the people waiting on an edge would be easy. See the code
in MSPersonControl::boardAnyWaiting(MSEdge* edge, MSVehicle* vehicle)
in MSPersonControl.cpp:159
Probably a check for distance to the bus stop would be needed
eventually (see http://sumo-sim.org/trac.wsgi/ticket/1058#ticket).

> 2) It would be nice to access/update information about persons in the simulation using TraCI, however this doesn't seem to be possible. Would this be something I could develop (e.g., working off TraCIServerAPI_Vehicle) or something that the SUMO team/others would have to implement?

You could probably take TraCIServerAPI_Vehicle as a template and build
this yourself. If you send us a patch we will include it in the trunk.
It would be a good idea to take the TraCI tests for vehicles (see
tests/traci) as a template as well and put in some person tests.
If you are planning on using the python TraCI API it will need to be
extended to cover persons as well.

Since it may still be quite a long time until we need TraCI persons
ourselves I would encourage you to implement this yourself if you have
some development experience.
Feel free to discuss questions about the code on the mailing list with us.

best regards,
Jakob