问题
I was wondering how can I start writing a program able to send message when a vehicle is close to the RSU. First, I still get confused by some definitions, but, little by little, I think I will learn veins.
module = simulation.getModuleByPath("rsu[0]");
c = MobilityAccess().get(module)->getCurrentPosition();
I found this part of code in this thread: Getting the location of two different modules
But still have some questions:
1) Module
is what kind of object? I would guess TraCIMobility*
2) How about simulation
? I have no idea.
So, could anyone please first explain to me how to get RSU coordinates in the TraCIDemo11p.cc?
Thanks!
回答1:
If you investigate the Veins 4.4 tutorial simulation (e.g., by running it in OMNeT++'s TkEnv), you will see that rsu[0]
contains a submodule named mobility
which is of type BaseMobility
. If you investigate the BaseMobility
class you will see that it has a method getCurrentPosition()
. Presumably from reading the OMNeT++ user manual you already know how to get a pointer to any module in your simulation.
Put this knowledge together and you have found one way (of many possible ways) to get the position of a (named) node in a Veins simulation.
Assuming you are using Veins 4.4, the following code can be executed by any OMNeT++ module in the simulation to get the position of a node named rsu[0]
:
Coord pos = check_and_cast<BaseMobility*>(getSimulation()->getModuleByPath("rsu[0].mobility"))->getCurrentPosition();
回答2:
Additionally, If you need a dynamic way to get the RSU coordinates. Mainly if you have a scenario with more than one RSU, you can use "findSubModule":
BaseMobility *baseMob;
baseMob = FindModule<BaseMobility*>::findSubModule(getParentModule());
Coord rsuCoord = baseMob->getCurrentPosition();
Hope this can help someone.
Cheers.
来源:https://stackoverflow.com/questions/42361852/how-to-get-rsu-coordinate-from-tracidem11p-cc