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[sumo-user] Emission Output Timer

Hello SUMO developers,

First of all I would like to thank you for the very nicely written and
commented source code. As well as for the useful documentation. It really
helps to implement own features :)

I am using SUMO for a project were I implemented a own car following model
into the source code. My simulation environment contains up to 4000 cars
and for the system to reach steady state I have to run he simulation for
approximately an hour. But if I want to generate an output with the option:
--emission-output <FILE> ; the simulation will take forever and just the
output of 60 seconds is almost 1GB of data.

I am searching for a way to generate output only for a given timeframe in
the simulation. Is there any way to do that?

I am also aware of the fact that I can save a state and then run the
simulation from said state. But since my car follow model has quite a lot
of variables with internal memory I would have to find a way to output them
in the saving of a state file. So this would be a more cumbersome option to
implement.

I assume to have located the structure for the output of the emission data
to be in the function "void MSFullExport::writeVehicles(OutputDevice& of)"
in the file MSFullExport.cpp. I tried to wrap an if statement as if(SIMTIME
> <TIME>) around the output inside the function, but it didn't help.

I hope there is a workaround for my issue. Would be glad about any
suggestions or hints on how to tackle my issue.

Thanks in advance for helping!

BR,

Damiano Schirinzi

master in mechanical engineering
ETH Z├╝rich
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