NS3 (3.37) Python

[tamuct ccilab]

I am trying to convert the manet-routing-compare.cc to a python code for educational purpose.

I am stuck here at line 306:
Ptr<PositionAllocator> taPositionAlloc = pos.Create()->GetObject<PositionAllocator>();

What i did is:

pos = ns.core.ObjectFactory()

pos.SetTypeId("ns3::RandomRectanglePositionAllocator")

pos.Set("X", ns.core.StringValue("ns3::UniformRandomVariable[Min=0.0|Max=300.0]"))

pos.Set("Y", ns.core.StringValue("ns3::UniformRandomVariable[Min=0.0|Max=1500.0]"))

taPositionAlloc = pos.Create()

streamIndex += taPositionAlloc.AssignStreams(streamIndex)

ssSpeed = f"ns3::UniformRandomVariable[Min=0.0|Max={nodeSpeed}]"

ssPause = f"ns3::ConstantRandomVariable[Constant={nodePause}]"

mobilityAdhoc.SetMobilityModel("ns3::RandomWaypointMobilityModel",

"Speed",

ns.core.StringValue(ssSpeed),

"Pause",

ns.core.StringValue(ssPause),

"PositionAllocator",

ns.core.PointerValue(taPositionAlloc))

mobilityAdhoc.SetPositionAllocator(taPositionAlloc)

This gives me the error:

TypeError: Template method resolution failed:
  void ns3::MobilityHelper::SetPositionAllocator(ns3::Ptr<ns3::PositionAllocator> allocator) =>
    TypeError: could not convert argument 1
  Failed to instantiate "SetPositionAllocator(ns3::Ptr<ns3::Object>&)"
  Failed to instantiate "SetPositionAllocator(ns3::Ptr<ns3::Object>*)"
  Failed to instantiate "SetPositionAllocator(ns3::Ptr<ns3::Object>)"

I know Type conversion is not as straight forward in python. Is there any workaround?
How can i get the PositionAllocator object in python?

[Gabriel Ferreira]

Use 

taPositionAlloc = ns.CreateObject("RandomRectanglePositionAllocator")
taPositionAlloc.SetAttribute("X", ns.StringValue("ns3::UniformRandomVariable[Min=0.0|Max=300.0]"))
taPositionAlloc.SetAttribute("Y", ns.StringValue("ns3::UniformRandomVariable[Min=0.0|Max=1500.0]"))
mobilityAdhoc.SetPositionAllocator (taPositionAlloc)


You can see more examples in the following link
https://github.com/Gabrielcarvfer/ns3_for_education/blob/master/100_network_topologies_and_mobility.ipynb

[tamuct ccilab]

Thank you.