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eclipse-sumo / sumo

Eclipse SUMO is an open source, highly portable, microscopic and continuous traffic simulation package designed to handle large networks. It allows for intermodal simulation including pedestrians and comes with a large set of tools for scenario creation.
https://eclipse.dev/sumo
Eclipse Public License 2.0
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randomTrips.py generating exactly the same outputs #8506

Closed a-huk closed 3 years ago

a-huk commented 3 years ago

I am working on VANETs and AODV. As part of my work, I need to run the same scenario in omnet++ a number of times, with different car movement each time. I use a custom downtown Manhattan map: manhattan.net.xml (see it attached).

To accomplish my goal I first generate trips via randomTrips.py with the following command: python3 /home/hukad/tools/sumo/tools/randomTrips.py -n manhattan.net.xml -e 50 -o manhattan.trips.xml

I have noticed that the trips and files are completely identical. In turn, routes generated via duarouter will in turn be the same.Could I get a confirmation of this issue? manhattan.zip

namdre commented 3 years ago

Reproducibility is a feature. You can set randomTrips option --seed to get a different (reproducible) random output or option --random to use a completely random seed.

Also, you can set duarouter option --weights.random-factor (with --seed / --random) if you want more variability in routes.