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Setup a multiple aircrafts arena

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Setup a multiple aircrafts arena

Postby Droogie » Sun Feb 17, 2019 2:01 pm

Hi,
I would like to send flight data (position...) over socket of multiple aircrafts (without running FlightGear if possible), and to collect and display all these data in one instance of FlightGear,
How can I do this ?
Thanks
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Re: Setup a multiple aircrafts arena

Postby wkitty42 » Sun Feb 17, 2019 8:17 pm

if flightgear is not running, where do you expect to send the data?
maybe you can be more clear about what you are attempting to do?
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Re: Setup a multiple aircrafts arena

Postby vanosten » Mon Feb 18, 2019 6:06 am

I guess you want to somehow calculate flightdata for other planes outside of FlightGear and then just transmit the data to your single FG instance. There are IMO 2 possibilities: use e.g Telnet to manipulate AI objects - that will only be visible for your FG instance. Or use multiplayer to make it visible for everyone (or only yourself if you use a privte MP server). You do not have to use an FG indtance to send data to MP. E.g. OpenRadar uses a Java implementation to talk to MP.

In case you intend to do something in Python with MP, then please let me know.
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Re: Setup a multiple aircrafts arena

Postby Droogie » Wed Feb 20, 2019 9:40 pm

As vanosten mentioned, I have my own engine, and other aircrafts behavior are calculated in this application, and all I have to do is send their positions to flightgear over udp connection so it can be rendered.
But the problem is that I don’t know the protocol to send data of multiple aircrafts.
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Re: Setup a multiple aircrafts arena

Postby drR0ckso » Wed Apr 10, 2019 12:35 pm

Your best resource is the wiki for this question. The multiplayer protocol is documented there and it's behavior explained. Alternatively, you could use python and telnet to the status port of a MP server (5001), and feed that information into your engine through other means.
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Re: Setup a multiple aircrafts arena

Postby ORZMUD » Wed Apr 24, 2019 4:51 am

This is something I was also toying around a few months ago (almost a year!), but didn't had the time to complete.
I was using ADSB data captured from a FM antenna feed to a raspberry pi with an rtl-sdr decoder and was trying to display the traffic in FGFS.

Let me know if this is something similar to what you're trying to achieve, I'm interested.

Regards,
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Re: Setup a multiple aircrafts arena

Postby Hooray » Sat May 04, 2019 12:35 pm

there is a dedicated interfacing mechanism called "external fdm" for exactly this sort of thing
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Re: Setup a multiple aircrafts arena

Postby ORZMUD » Mon May 06, 2019 4:44 am

Thanks @Hooray for the tip.
I'll start the search.

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