These are quite unusual symptoms.
- the most likely cause is outdated graphics drivers. Try updating.
- it would look somewhat like this if you used the option --mesosim
(disable it if this is the case)
- it might look like this if your cars are going very fast. You could add
the option --step-length 0.1 to get more frames
regards,
Jakob


2016-07-01 22:04 GMT+02:00 <[email protected]>:

> Hello there,
>
> I am new to sumo and now building my first simulations, so forgive me if
> this has been discussed before. A search through these lists did not reveal
> something.
>
> When I use sumo-gui, the vehicles appear only at the edges of the screen.
> When they pass the edge, they disappear, only to reappear at the other edge
> of the screen (see screenshot). Between the edges, the vehicles are not
> visible.
> So, it's basically like vehicles flashing at the edges of the screen, while
> the simulation runs normally.
> I tried switching colours to the road and the vehicles but nothing
> changed.
> Any ideas would be most welcome!
>
> Thank you!
> Antonis[image: sumo vehicles.png]
>
>
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