sudo sumo --remote-port 47000 -c map.sumocfg &
#include <iostream>
#include <stdlib.h>
#include <string>
#include "TraCIAPI.h"
class Client : public TraCIAPI {
public:
Client() {};
~Client() {};
};
int main(int argc, char* argv[]) {
Client client;
int order = atoi(argv[1]);
client.connect("localhost", 47000);
std::cout << "run 5 steps ...\n";
TraCIAPI::VehicleScope vehicleScope(client);
while(true ) {
client.simulationStep();
libsumo::TraCIPosition pos =
vehicleScope.getPosition(std::to_string(order));
std::cout << pos.x << ", " << pos.y << std::endl;
}
std::cout << "time in ms: " << client.simulation.getCurrentTime() << "\n";
client.close();
}
Here is my client code.
I run sumo like this: sudo sumo --remote-port 47000 -c map.sumocfg &
Then I run client program: ./client 1
So the program should continuously print the position of vehicle with id 1. It
is printing for some time, and after some time the program is throwing the
following error:
terminate called after throwing an instance of 'tcpip::SocketException'
what(): .. Answered with error to command (164), [description: Vehicle '1'
is not known]
Aborted (core dumped)
What might have caused this error?
Muktadir
________________________________
From: [email protected] <[email protected]> on behalf
of Mirko Barthauer <[email protected]>
Sent: Saturday, September 8, 2018 11:40:12 PM
To: [email protected]
Subject: Re: [sumo-user] Getting information from simulated vehicle
You have full control over the simulation duration. As long as the while loop
is executed, your simulation continues. Jakob just wrote it as some sample code
to adapt to your purpose. Could be something like:
runSim = True
steps = 0
while runSim:
traci.simulationStep()
steps += 1
# stop criterion - can be any other condition
runSim = steps < 3600
Regards
Mirko
Am 08.09.2018 um 17:56 schrieb Muktadir R Chowdhury (mrchwdhr):
Will the following loop continue to run till the simulation finishes?
while True:
traci.simulationStep()
Muktadir
________________________________
From: [email protected]<mailto:[email protected]>
<[email protected]><mailto:[email protected]> on behalf
of Jakob Erdmann <[email protected]><mailto:[email protected]>
Sent: Friday, September 7, 2018 6:47:54 PM
To: Sumo project User discussions
Subject: Re: [sumo-user] Getting information from simulated vehicle
Yes.
2018-09-07 14:35 GMT+02:00 Muktadir R Chowdhury (mrchwdhr)
<[email protected]<mailto:[email protected]>>:
Regarding client ordering: the process that spawns the clients just needs to
assign an arbitrary running number and this number is given after connecting
with the setOrder command.
Does it mean setting up the order in which the clients will be served by Traci
server?
Muktadir
________________________________
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> on behalf
of Jakob Erdmann <[email protected]<mailto:[email protected]>>
Sent: Friday, September 7, 2018 6:09:03 PM
To: Sumo project User discussions
Subject: Re: [sumo-user] Getting information from simulated vehicle
The web service technology employed by TraaS can be used in a local network
without involving the world wide web.
Regarding client ordering: the process that spawns the clients just needs to
assign an arbitrary running number and this number is given after connecting
with the setOrder command.
2018-09-07 13:56 GMT+02:00 Muktadir R Chowdhury (mrchwdhr)
<[email protected]<mailto:[email protected]>>:
My client program can not be web-based. So I am left with the first option and
I am using C++ Traci API.
When using TraCI in multi-client mode, all clients have to connect at the
beginning and all of them have to run at least a loop similar to
while True:
traci.simulationStep()
According to document: "Please note that in multi client scenarios you must
explicity specify the execution order of the clients using the
SetOrder-command<http://sumo.dlr.de/wiki/TraCI/Control-related_commands#Command_0x03:_SetOrder>."
Do I also have to do it here? If so how can I do it?
I don't need my client to interfere with the simulation. I just want the
simulation to run and the clients will get info as needed.
Muktadir
________________________________
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> on behalf
of Jakob Erdmann <[email protected]<mailto:[email protected]>>
Sent: Friday, September 7, 2018 5:19:58 PM
To: Sumo project User discussions
Subject: Re: [sumo-user] Getting information from simulated vehicle
When using TraCI in multi-client mode, all clients have to connect at the
beginning and all of them have to run at least a loop similar to
while True:
traci.simulationStep()
Alternatively, you can use TraaS (TraCI as a Service) which acts as a single
client and collects commands from an arbitrary number of web service clients
and forwards them to sumo. (http://traas.sourceforge.net/cms/)
TraaS is already part of sumo and can be found in sumo/bin.
regards,
Jakob
2018-09-07 13:12 GMT+02:00 Muktadir R Chowdhury (mrchwdhr)
<[email protected]<mailto:[email protected]>>:
Thanks for your reply. Ok I will upgrade my SUMO.
According to this http://sumo.dlr.de/wiki/TraCI#V2X_simulation , "When started
with the --remote-port
<INT><http://sumo.dlr.de/wiki/Basics/Notation#Referenced_Data_Types> option,
SUMO<http://sumo.dlr.de/wiki/SUMO> only prepares the simulation and waits for
all external applications to connect and take over the control. ".
That means client connected to SUMO is responsible for running the simulation.
But, what I want to do is SUMO will run as soon as I issue the command "sumo
--remote-port <INT> --num-clients <INT>". Then each client (correspond to a
vehicle) will connect to SUMO and request some vehicle specific information
(like current position etc.).
Can you please give me a pointer on how can I do this?
Muktadir
________________________________
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> on behalf
of Jakob Erdmann <[email protected]<mailto:[email protected]>>
Sent: Friday, September 7, 2018 4:58:36 PM
To: Sumo project User discussions
Subject: Re: [sumo-user] Getting information from simulated vehicle
Multi-client support is only available since version 0.31.0. I recommend
upgrading to version 1.0.0, though.
regards,
Jakob
2018-09-07 12:56 GMT+02:00 Muktadir R Chowdhury (mrchwdhr)
<[email protected]<mailto:[email protected]>>:
How can I specify the number of clients when starting SUMO, I am using SUMO
version 0.25 and it is saying "no option with the name 'num-clients' exists."
Muktadir
________________________________
From: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>> on behalf
of Jakob Erdmann <[email protected]<mailto:[email protected]>>
Sent: Friday, September 7, 2018 4:19:59 PM
To: Sumo project User discussions
Subject: Re: [sumo-user] Getting information from simulated vehicle
Yes, as long as you know the number of clients in advance.
2018-09-07 12:05 GMT+02:00 Muktadir R Chowdhury (mrchwdhr)
<[email protected]<mailto:[email protected]>>:
I want to achieve the following in SUMO:
(1) SUMO will run in a specified port. Let's say there are "n" vehicles in the
simulation.
(2) SUMO will keep running while "n" client will connect to SUMO, and each
client will print location information of each of the vehicles in regular
interval.
Is it possible to do?
Muktadir Chowdhury
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