What calls the initialize method in application CPP file in veins?

Question

void myAPP::initialize(int stage) {
    ....
}

I am trying to understand what calls? I have done the tictoc tutorial but the initialize method in there does not have int stage as a parameter. Can someone shine some light?

Answer 1

Multi-stage initialization (i.e. initialize with stage parameter) is used by the simulation environment if a module contains redefined numInitStages() method.

Example 1:
No redefinition numInitStages() in the class.
The simulation environment calls method:

• initialize()

Example 2:
The class contains:

int numInitStages() const { return 3; }
void initialize(int stage);

The simulation environment calls methods:

• initialize(0)

• initialize(1)

• initialize(2)

TicToc examples don't have numInitStages() so initialize() without parameters is called.