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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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