I read the paper, below, on the FlightGear wiki. Very interesting. We've
toyed with the idea of an FDM server for a while, and there was even some
work done on JSBSim towards making that happen. Recently, HDWysong has added
the capability to use FlightGear as a visual front end for JSBSim as a
separate, scripted application. It certainly would be a huge paradigm shift.





[mailto:[EMAIL PROTECTED] On Behalf Of Petr
Sent: Tuesday, March 04, 2008 1:26 PM
To: flightgear-devel@lists.sourceforge.net
Subject: [Flightgear-devel] Suggestion to make FlightGear multiplayer
compliant with HLA


Dear FlightGear developers,

(a short introduction first: I'm a newcomer to FlightGear, my professional
profile can be found at  <http://www.linkedin.com/in/gotthard>


May I ask whether you would be interested on striving to make FlightGear
compliant with the US DoD High Level Architecture (HLA)? It could make
FlightGear more attractive.


I found that


1) several FlightGear multiplayer server feature requests at
http://sourceforge.net/projects/fgms suggest to introduce

 - subscription-based property management

 - customizable set of propagated properties

 - more efficient data propagation mechanism

 - global status for date/time, weather, AI object positions


2) also the description of "A New Architecture for FlightGear Flight
Simulator" proposes a distributed FlightGear architecture, which would allow
all users to see the same AI objects



I believe that especially the HLA Declaration Management and Data
Distributio n Management perfectly match the above mentioned demands.

Just look at Fig.2 in


It's nothing that can be achieved in a few days, but I think it's feasible.
To have a perfect solution we'd need to (probably in this order)

 - turn the FlightGear multiplayer server into a HLA RTI (run-time envir

 - implement the multiplayer protocol according to HLA standards

 - factor out (extract) the non-aircraft objects (weather, AI objects, ATC
server, etc.) to enable global status


What is your opinion? I want to start developing a HLA RTI first, so (if
you're interested) there will be plenty of time to discuss the requirements
and architectural issues.


One answer in advance: I've seen an idea to extend FlightGear to support the
DIS protocol (a HLA predecessor and c ompetitor). I believe that HLA is more
suitable for this purpose because it implements Data Distribution



Best Regards,


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