How do I take actions every step in Veins?

Question

I am using Veins to implement a scenario in which I shall update a vehicle's route every time step characterized by the step selfmsg. In which module shall I find this behavior? I want to add some more functions to this module in the application layer by extending it. Is it possible to do that?

Answer 1

You can take advantage of the fact that SUMO updates the positions of all vehicles at exactly the same time. By extension, Veins (I am assuming you are using version 4a2) will update the OMNeT++ positions of all vehicles at exactly the same time. See the Veins tutorial demo application for how to execute code whenever the position changes. Indeed, this will make sure that all code is running within in a single OMNeT++ event, which seems to be what you want.