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Re: [sumo-user] I am unable to start sumo from c++ by using libtraci

Dear Milad,

 

I have added answers and comments directly below your questions.

 

Best regards

Mirko

 

 

 

 

-----Original-Nachricht-----

Betreff: Re: [sumo-user] I am unable to start sumo from c++ by using libtraci

Datum: 2024-01-16T15:17:57+0100

Von: "Milad Sasha" <milad.sasha70@xxxxxxxxx>

An: "Mirko Barthauer" <m.barthauer@xxxxxxxxxxx>

 

 

 

Dear Mirko
 
Thank you so much for your help and support. Actually I have some misunderstandings as follows:
1- do I need to start SUMO Home in my c++ client? If so could you please tell me how since the example in document is for python traci not for libtraci and libsumo
 
"SUMO_HOME" is the identifier of an environment variable we use inside SUMO for retrieving the valid SUMO installation. The python interface uses it to import the right traci and sumolib modules. No need here, just get the include path to libtraci or libsumo right.
 
2- to include libsumo I include the path to the include folder in the header file of my c++ program and included all the include files in that folder except for libtraci
 
Can't help much here. Please have a look at general C++ resources or the help of the IDE you work with to get the paths right.
 
3- when I try to use namespace library it has an error. I think I have not included libtraci properly. 
 
Same as question 2.
 
4- if there is no need for arguments in start function of simulation class, so where should I input the path to sumo.exe?
 
This is a misunderstanding. The path to sumo.exe is part of the vector of string argument you give to the start function (just as in the Python interface and the libtraci & libsumo examples). In case the directory of sumo.exe is referenced in the "PATH" environment variable, you can omit the full path and just call the application.
 
I know my questions are a lot but I really appreciate if you can help me with this. Thank you so much in advance.
 
 
Best regards
Milad Sashurpour 

On Tue, Jan 16, 2024 at 2:25 AM Mirko Barthauer <m.barthauer@xxxxxxxxxxx> wrote:

Dear Milad,

 

there are two things to consider:

  • libtraci namespace (but as long as you have libsumo installed, the actual code for running sumo is the same)
  • libtraci::Simulation::start will take the full call to sumo (path to sumo and command line arguments) - you don't separate that into two arguments but have to provide one vector of strings containing all (as in the example you adapted)

Best regards

Mirko

 

 

 

-----Original-Nachricht-----

Betreff: [sumo-user] I am unable to start sumo from c++ by using libtraci

Datum: 2024-01-16T02:06:57+0100

Von: "Milad Sasha via sumo-user" <sumo-user@xxxxxxxxxxx>

An: "sumo-user@xxxxxxxxxxx" <sumo-user@xxxxxxxxxxx>

 

 

 

Good Morning
 
I hope this email finds you well. I am currently trying to start sumo from an unreal engine c++ program. importing libtraci library was successful. However , I cannot start sumo based on the sample in libtraci documentation. here is my code:
 
 
 
 std::string sumoPath = "C:\Users\simone\Downloads\sumo-1.19.0\bin\sumo-gui"; 

 std::vector<std::string> sumoArgs = { "-n", "C:\Users\simone\Downloads\sumo-1.19.0\bin\montreal1.net" };

libsumo::Simulation::start(sumoPath, sumoArgs);

 // Simulate for 5 steps
 for (int i = 0; i < 5; i++) {
    libsumo::Simulation::step();
 }

  libsumo::Simulation::close();
 
 
 
However, I think I am entering the argument wrong. What should be the argument of the start method?
start({"sumo", "-n", "net.net.xml"});
 
 
I appreciate your help and answer my question. Thank you so much.
 
Best regards,
Milad
 


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