Hoi Robin,

Robin van Steenbergen wrote:
>> Hello people from the FlightGear team,
>>
>> Let me first introduce myself ;)
> 
>> I'm a home cockpit builder from Eindhoven, The Netherlands, and I'm  
>> researching the possibility of using FlightGear as a flight  
>> dynamics server for medium to large cockpit setups.
>> Amongst other things I'm developing my own instruments in OpenGL,  
>> and we're using FS2004 for the visual system (since the European  
>> scenery in FlightGear is still somewhat, absent.). Our goal would  
>> be to use the FlightGear system in an educational simulator for a  
>> Fokker F28 aircraft, at the school I'm about to attend (Aerospace  
>> Engineering in Delft).

Looks like a nice project!

>> The only hiccup in the system right now is tying every bit  
>> together. The instruments render perfectly and FS2004 works a treat  
>> as a visual display (like the PS1 guys do), but the network still  
>> causes some trouble. Main thing is that I can't find the  
>> documentation for the protocol used by FlightGear for data I/O. The  
>> Wiki has the docs for the HTTP and the telnet protocol, but pulling  
>> large amounts of data out of that is pretty impossible.
>> Note that everything is connected through a LAN and the ideal case  
>> would be to use a multicast to connect some systems together, but  
>> I'm still unsure whether that's possible. The packet format used by  
>> FlightGear is the main concern right now.

The documentation is in the source code. In your case it's located in
FlightGear/src/Network/net_ctrls.hxx and/or 
FlightGear/src/Network/net_fdm.hxx

There is also a small example application located in 
FlightGear/examples/netfdm

Erik
-- 
http://www.ehtw.info (Dutch)    Future of Enschede Airport Twente
http://www.ehofman.com/fgfs     FlightGear Flight Simulator

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