| Re: [sumo-user] Polygon coordinates via TraCI |
_______________________________________________Hi Jakob,
i traced down the error and found out that it is caused by a specific polygon in the polygon description file. When I detect this polygon during runtime to prevent the application from reading out its shape (see attached minimal example), it totally works for every other polygon. So the error is potentially linked to the polygon’s definition. I also attached the polygon description file to this mail.
Regards,
Marc
Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von Jakob Erdmann
Gesendet: Freitag, 12. Oktober 2018 22:20
An: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] Polygon coordinates via TraCI
I am unable to reproduce the issue (testing with 1.0.1 and also with 0.32.0).
Please provide a minimal TraCI script that causes the error on your side.
Am Fr., 12. Okt. 2018 um 19:46 Uhr schrieb Marc Zofka <zofka@xxxxxx>:
Hi Jakob,
I checked your hints from the last mail:
· The error appears regardless of whether I call polygon.getShape() immediately after TraCIAPI::connect() or after setting up some subscriptions.
· I am using the following code
[…]
const std::vector<std::string> polygon_ids = polygon.getIDList();
for(std::size_t i=0; i < polygon_ids.size(); i++)
{
const std::string id = polygon_ids.at(i);
const std::string type = polygon.getType(id);
const TraCIPositionVector shape = polygon.getShape(id);
const TraCIColor color = polygon.getColor(id);
Polygon p(id, type, shape, color);
}
[…]
and the error only occurs, if polygon.getShape(id) is called. The error does not occur when I comment polygon.getShape() out.
I also tried to comment *only* polygon.getType() out, since I had assumed that its invocation might could have caused the problem, but the error persisted.
So from my point of view, I assume that the problem is directly linked to the polygon.getShape() function.
I would appreciate any ideas.
Best regards,
Marc
Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von Jakob Erdmann
Gesendet: Freitag, 12. Oktober 2018 11:59
An: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] Polygon coordinates via TraCI
- Can you reproduce the error when polygon.getShape() is the only traci call (after initialization)?
- Can you retrieve other polygon values without error?
Am Fr., 12. Okt. 2018 um 10:28 Uhr schrieb Marc Zofka <zofka@xxxxxx>:
Hi,
we are working with SUMO-GUI v.032 and the TraCI C++ code from v0.32.
Best regards,
Marc
Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von Jakob Erdmann
Gesendet: Freitag, 12. Oktober 2018 09:00
An: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] Polygon coordinates via TraCI
Hello,
shape retrieval is working in our currents tests. The error might be caused by mixing client version 1.0.0+ with sumo version 0.32.0 (there was a protocol change in 1.0.0)
regards,
Jakob
Am Do., 11. Okt. 2018 um 08:59 Uhr schrieb Marc Zofka <zofka@xxxxxx>:
Dear Sumo-Users,
we tried to access the polygon information within the C++ TraCI, as proposed in a former issue (see below):
[…]
const std::string id = polygon_ids.at(i);
const std::string type = polygon.getType(id);
const TraCIPositionVector shape = polygon.getShape(id);
[…]
Unfortunately, we obtain the following error in the SUMO-GUI (v0.32)
Error: Storage::writeUnsignedByte(): Invalid value, not in [0, 255]
Quitting (on error).
when we execute the polygon.getShape() method (see above), which is defined in TraCIAPI.cpp as follows:
// ---------------------------------------------------------------------------
// TraCIAPI::PolygonScope-methods
// ---------------------------------------------------------------------------
[…]
TraCIPositionVector
TraCIAPI::PolygonScope::getShape(const std::string& polygonID) const {
return myParent.getPolygon(CMD_GET_POLYGON_VARIABLE, VAR_SHAPE, polygonID);
}
[…]
Can you recommend how we could solve that issue?
Regards,
Marc
Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von Jakob Erdmann
Gesendet: Mittwoch, 12. September 2018 12:44
An: Sumo project User discussions <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] Polygon coordinates via TraCI
2018-09-12 12:42 GMT+02:00 Thomas Thorn <thorn@xxxxxx>:
Hello everybody,
I am new to sumo. I use sumo 0.32 and was wondering if it is possible to get the coordinates of a polygon via TraCI.
Best regards,
Thomas
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