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Re: [sumo-dev] Lead vehicle type in Wiedemann car-following model
The function MSCFModel_Wiedemann::_v does not have access to the lead vehicle.
You must either add another parameter to that function and modify the call to _v in MSCFModel_Wiedemann::followSpeed or you just do your printing in
MSCFModel_Wiedemann::followSpeed before the call to _v (i.e. pred->getID()).
I advise seeking programming guidance on your campus as you will run into lots of questions like these and general programming help is beyond the scope of this mailing list.

regards,
Jakob

2018-04-06 1:12 GMT+02:00 Umair Durrani <durraniu@xxxxxxxxxxx>:
Thanks for your help.

Coming back to the lead vehicle, how do I use the pred object? To clarify, I mean that for the veh object I get the information from MSVehicle.h and MSVehicleType.h files. For example within the _v() function, I can do:

std::cout << veh->getID();

But where do I get the ID and other attributes of pred?  Could you please give me an example of printing the lead vehicle ID and type/class in the _v() function?

I am really thankful for your patience and help.



best regards,
Umair Durrani 
Ph.D. Candidate
Civil and Environmental Engineering

On Thu, Apr 5, 2018 at 2:39 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx> wrote:
You need a working installation of python and then the version.h file is automatically generated during the build process.


2018-04-05 20:32 GMT+02:00 Umair Durrani <durraniu@xxxxxxxxxxx>:
Thanks. I have downloaded it from github.

However, when I build it I get an error:  Cannot open include file: 'version.h': No such file or directory  

So, I opened an github issue:  Error: Cannot open include file: 'version.h': No such file or directory #3967 on sumo master.  

best regards,
Umair Durrani 
Ph.D. Candidate
Civil and Environmental Engineering

On Thu, Apr 5, 2018 at 2:27 PM, Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx> wrote:
the files at http://sumo.dlr.de/wiki/Downloads#SUMO_-_Latest_Development_Version are only updated during the night. If you download tomorrow you should be able to get them there.
Alternatively, download them directly from github: https://github.com/DLR-TS/sumo/archive/master.zip

regards,
Jakob

2018-04-05 17:16 GMT+02:00 Umair Durrani <durraniu@xxxxxxxxxxx>:
Hi Jakob,

Thanks for your reply. I see that you made changes few hours ago.  I'm very new to git/github and developement so please bear with me. 

Based on the commit ID you provided, I found that the changes are shown on this URL: https://github.com/DLR-TS/sumo/commit/8f43c4a6874690c0a41443b1efbead0e4384f921  

So, I thought when I download the development version from this link: (http://sumo.dlr.de/wiki/Downloads#SUMO_-_Latest_Development_Version)  I'd get the new files

However, I don't see any changes in the files. Where can I download the latest development version that includes those followSpeed() changes that you recently made?



best regards,
Umair Durrani 
Ph.D. Candidate
Civil and Environmental Engineering

On Thu, Apr 5, 2018 at 3:31 AM, Jakob Erdmann <namdre.sumo@xxxxxxxxxxxxxx> wrote:
Hello,
in the very latest development version (8f43c4a6874690c0a41443b1efbead0e4384f921) the followSpeed() API includes a parameter for the lead vehicle. Note, that in some calling contexts, this value may be a nullpointer
regards,
Jakob

2018-04-03 20:23 GMT+02:00 Umair Durrani <durraniu@xxxxxxxxxxx>:
Hi,

I am looking into the Wiedemann model and related
​.​
cpp and .h files in the development version of SUMO.   

Is there a way to print or do something with the LEAD vehicle type in the MSCFModel_Wiedemann.cpp?. I found 'gap2pred' and 'predspeed' but nothing like 'predType' or 'predClass'.

Ideally, I want to change the behavior of following vehicle if the lead vehicle class is a truck. 

best regards,
Umair Durrani 
Ph.D. Candidate
Civil and Environmental Engineering


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