Re: [sumo-user] Controlling vehicles using TraCI

[Jakob E. <nam...@go...>]

Hello,
the command needs to be
"getvariable_plus 0xab 0x82 0 <compound> 2 0x01 8100,00 1500,00 0x04"
All traci commands have the form [getVariable, domain, variable, targetId, ...]
This even holds for simulation variables where the targetId is discarded.
regards,
Jakob

2013/7/23 Micky Sung <msu...@gm...>:
> Hi again,
>
> I've tried using the format suggested, but it throws up and error of invalid
> position. I though that this might be from my client but I tried the same
> with the Windows build of the TraciTestClient.exe and in the definition file
> I tried:
>
> "getvariable_plus 0xab 0x82 <compound> 2 0x01 8100,00 1500,00 0x04" - this
> throws up the error of "## Unknown data type: 2", to try and solve this I
> put the corresponding data types in front of the values, but then that would
> throw up the error of "Error: Answered with error to command 171: Position
> conversion requires a compound object."
>
> Thank you very much for your help in this matter,
> Micky Sung
>
>
> On 23 July 2013 11:09, Jakob Erdmann <nam...@go...> wrote:
>>
>> Hello,
>> <compound> 2 0x01 8100,00 1500,00 0x04
>> should work. (see
>>
>> https://sourceforge.net/apps/mediawiki/sumo/index.php?title=TraCI/Protocol#Position_Representations)
>> regards,
>> Jakob
>>
>> 2013/7/22 Micky Sung <msu...@gm...>:
>> > To: Jakob,
>> >
>> > Ah, of course! Thank you very much for pointing that out, I had not
>> > noticed
>> > that API. Is it the Position Conversion (0x82) command in the Get
>> > Simulation
>> > Variable?
>> >
>> > I am currently trying that now, but I am having trouble entering in the
>> > correct Position representation into the string that I enter into
>> > client. I
>> > am assigning "<compound> 2 8100,00 1500,00 0x01 0x04" into the
>> > std::string&
>> > objID given that 8100,00 and 1500,00 is the X and Y coordinates from the
>> > simulation and I am wanting the positionRoadMap conversion back. Would
>> > it be
>> > possible for you to let me know what is the correct format I need for
>> > the
>> > Position representation as I am stuck on that currently.
>> >
>> > Kind regards,
>> > Micky Sung
>> >
>> >
>> > On 22 July 2013 08:20, Jakob Erdmann <nam...@go...> wrote:
>> >>
>> >> Hello,
>> >> You will have to update the route all the time but that should be no
>> >> problem.
>> >> there is a traci call which transforms geo-coordinates into (lane,pos)
>> >> coordinates but the simulation will not let vehicles drive off-road
>> >> without some c++ hacking.
>> >> regards,
>> >> Jakob
>> >>
>> >> 2013/7/19 Micky Sung <msu...@gm...>:
>> >> > To: Everybody,
>> >> >
>> >> >   I have a predicament using SUMO, I am wanting to control a vehicle
>> >> > in
>> >> > the
>> >> > simulation using the implemented commands such as "Change Vehicle
>> >> > State
>> >> > -
>> >> > Move To" or "Change Vehicle State - Reroute" so that I can possibly
>> >> > integrate it with some form of user interactive program (for example,
>> >> > a
>> >> > driving "game") to allow user's to drive a SUMO vehicle.
>> >> >
>> >> > My scenario is this:
>> >> > ----------------------------
>> >> >   I have a simulation running and I have a client connected to the
>> >> > simulation using the TraCI interface.
>> >> >   Through this interface I am able to add a vehicle into the
>> >> > simulation
>> >> > by
>> >> > assigning it a route already defined within the simulation (i.e.
>> >> > route
>> >> > !1000) along with a speed. This new vehicle will continues along this
>> >> > route
>> >> > until the end like a standard vehicle.
>> >> >
>> >> > What I am wanting to do:
>> >> > ------------------------------------
>> >> >   After inserting this vehicle, I want to be able to control this
>> >> > vehicle's
>> >> > speed and positioning. I am able to do this already with the speed
>> >> > using
>> >> > "Change Vehicle State - Speed" with no problem. I am also wanting to
>> >> > control the vehicle's positioning directly, so, for example I could
>> >> > make
>> >> > a
>> >> > vehicle turn left and right regardless of the original route and lane
>> >> > or
>> >> > edge.
>> >> >
>> >> > Problems:
>> >> > --------------
>> >> > However, I am having problems with changing the position of the
>> >> > vehicle
>> >> > due
>> >> > to the fact that I would need the Lane ID or Edge ID or the Route ID.
>> >> > However, because I am wanting to try and make this more game-like, I
>> >> > would
>> >> > like to try and change the vehicle's position given only the
>> >> > positioning
>> >> > data (i.e GPS or the Cartesian values used in SUMO - I can use the
>> >> > Proj4's
>> >> > transformation formula to change the values back and forth with no
>> >> > problem).
>> >> >
>> >> > So, one possible solution that I had thought of would be to use the
>> >> > position to get the nearest Edge/Lane and then I could add that to
>> >> > the
>> >> > route as a bit of a work around. But my only worry with that is that
>> >> > I
>> >> > would not be able to give it a position outside of any known
>> >> > route/edge/lane.
>> >> >
>> >> > Regards,
>> >> > Micky Sung
>> >> >
>> >> >
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