Hello, the answer is (A). The special handling in (B) is only done to simplify our regression tests. regards, Jakob
2017-10-19 8:50 GMT+02:00 Marc Rene Zofka via sumo-user < [email protected]>: > Hi, > > i've got a question concerning the appropriate way of implementing and > using TraCI C++ for controlling sumo externally. > > Currently, there seems to be two distinct ways of, e.g., subscribing to > sumo quantities (such as vehicle position and speed): > > > (A) According to [1]: Here, an exemplary minimal TraCIClient is > demonstrated which makes use of function calls which are inherited directly > from the TraCIAPI class, such as simulationStep() or close(). Also, here i > could subscribe to variables using TraCIAPI::SimulationScope:: > subscribe(...). > > > (B) The TraCITestClient, which is also provided with sumo, demonstrates > two ways of subscribing to variables: > On the one hand, variables are subscribed using the beforementioned call > to the subscribe() function oft he TraXIAPI class. On the other side, in > the run() method, the function commandSubscribeObjectVariable() from the > TraCITestClient itself is used to subscribe to variables. > > So now looking at the details, both are calling > > * TraCIAPI ::send_commandSubscribeObjectVariable() and > > * TraCIAPI:: check_resultState() > from the base class, but seem to handle the following steps differently: > Whereas TraCIAPI::SimulationScope::subscribe() calls > check_commandGetResult() and readVariableSubscription() additionally, the > other way the TraCITestClient, first, handles possibly thrown exceptions, > then secondly and more important, calls TraCITestClient:: > validateSubscribe(). > > So, my question is what is the appropriate way of variable subscription? > > Best regards! > > > [1] http://sumo.dlr.de/wiki/TraCI/C%2B%2BTraCIAPI > > > ------------------------------------------------------------ > ------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > sumo-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sumo-user > _______________________________________________ > sumo-user mailing list > [email protected] > To change your delivery options, retrieve your password, or unsubscribe > from this list, visit > https://dev.eclipse.org/mailman/listinfo/sumo-user >
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