problem in understanding the 4 argument of .AddTraceSource

[Kapil Kumar sharma]

.AddTraceSource ("CourseChange",
"The value of the position and/or velocity vector changed",
MakeTraceSourceAccessor (&MobilityModel::m_courseChangeTrace),

"ns3::MobilityModel::CourseChangeCallback")

l have problem in understanding what the last argument means. From what i have understood from the previous example was that in "ns3::MobilityModel::CourseChangeCallback" meant a typedef for the tracedvalue type

Can anyone please elaborate on this?

[Zhang Chenke]

I have the same problem as you. Have you solved it?

[Tommaso Pecorella]

The 4th argument is to allow a check of the callback parameters. Meaning that the function you use as a callback must have the same parameters as the "MobilityModel::CourseChangeCallback" one.