Using Netanim in NS-3 : how to positionate a node

[Arij Souai]

Hi everyone,

I need you help please !

Im a biginner  in using NS-3 

So i want to know how can i set a constant position for a node,

In fact when i run ./NetAnim , it shows nodes in disorder , so i want them to be clear whith a convinient size too. 

can you help me if you know please ? 

thank you.

[Gabriel Ferreira]

You need to put something like this in your simulation.

Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();

    for (uint16_t i = 0; i < numberOfNodes; i++)

    {

        positionAlloc->Add (Vector(X, Y, Z));

    }

    MobilityHelper mobility;

    mobility.SetMobilityModel("ns3::ConstantPositionMobilityModel");

    mobility.SetPositionAllocator(positionAlloc);

    mobility.Install(your_node_container);

[shreya mishra]

Hello,

What if I have the x and y coordinates of nodes in a file for around 11k nodes. How can I do then?

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[Gabriel Ferreira]

I would read the coordinates into an array of arrays
e.g. double xyz[][] = [[x0,y0,y0],[x1,y1,z1];
then
e.g. positionAlloc->Add(Vector(xyz[i][0], xyz[i][1], xyz[i][2]));

[shreya mishra]

Thanks a lot for your response . I'm still a little confused about reading the file that contains the coords... I'll try doing as you suggested.

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[Arij Souai]

Thanks a lot for your help !  It works .

ᐧ

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[Juan Antonio Arízaga Silva]

This fie has the information you need

examples/wireless/wifi-simple-adhoc-grid.cc

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[shreya mishra]

Hello,

I can place the nodes as per my pre-defined coordinates. However, I cannot map the node IDs predefined by me corresponding to the coordinates. Is there a way to do so? Because in Vector function I can only give the coordinates. 

Please let me know

Thanks in advance

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[Gabriel Ferreira]

I'm not sure if there is a "correct" way to do this.
I would create all the nodes in the correct order, matching the coordinate file, and then assign their positions as shown before. 
You could also install the mobility model + coordinate individually (e.g. by replacing the coordinate vector with a map using the NodeId as a key).

[shreya mishra]

Okay... I'll try doing the same...

Thanks for your help.

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[shreya mishra]

Hello,

Do you think I can simulate elevations in NS3? By that I mean movement of drones 

Thanks in advance

Shreya