omnet++veins

How to get RSU node coordinates in veins?

I'm used Veins 5.0 in my simulation environment.

There are currently 4 RSU nodes in use. The omnetpp.ini code is as follows:

omnetpp.ini

*.fRSU[0].mobility.x = 125
*.fRSU[0].mobility.y = 125
*.fRSU[0].mobility.z = 3
...

Here is the C++ code for RSU:

fRSUBehavior.cc

posX = check_and_cast<BaseMobility*>(getSimulation() -> getModuleByPath("fRSU[0].mobility.x")) -> getPositionAt(simTime()).x;
posY = check_and_cast<BaseMobility*>(getSimulation() -> getModuleByPath("fRSU[0].mobility.y")) -> getPositionAt(simTime()).y;
EV << "X: " << posX << " Y: " << posY << std::endl;

In this file I want to get the location of that node. However, the value of the log output is always defined as 0.

How should I modify the code?

Solution

  • The getModuleByPath("fRSU[0].mobility.x")) is unlikely to work. The module name is very likely fRSU[0].mobility, that is, it does not include the parameter name. Very likely, the getModuleByPath returns a Null pointer and, by chance, your program does not crash but you are instead reading somewhat sensible values.