Hi,
> I think this will also involve changes to the aircraft 3D model
> specification. The VRP is the agreed-upon common Visual Reference Point
> between the FDM and 3D model representations of an aircraft. The FDM (at
> least JSBSim) specifies points in the aircraft structural frame in units of
> inches, in our configuration file. In turn, the lat/lon/alt of the VRP is
> reported to FlightGear via the JSBSim FGInterface object.
>
> This also raises a potential conflict (one of perhaps a few): If an
> aircraft 3D model is used by more than a single FDM, does this have
> implications for proper placement of an aircraft model? I am unfamiliar
> with how YASim provides positioning information to FlightGear.
Since in JSBSim the reference point is a configuration option, there are no
conflicts anymore.
If, say XXXSim can only report positions of the left wing tip (just to give a
boring example), JSBSim is gracefully able to use this visual model too. Just
locate the JSBSim VRP at the left wingtip ...
I think we can also have the best compatibility for 1.60 files when we take
the static center of gravity for a default value of the VRP. Since previously
the dynamic center of gravity was reported to FGInterface the static one will
hopefully be close to the static one.
> Also, the pilot eyepoint as provided by JSBSim needs to be used correctly
> to properly place the actual pilot viewpoint correctly. For something like
> the B-747 this is important to get right: as the gear touches down for a
> B-747 landing the pilot is still considerably higher off the ground.
By the way, I don't know what the eyepoint is used for. I thought it is only
used to compute the accelerations of the pilots head?
> Currently, it appears that pilot eyepoint is not being provided to
> FlightGear from JSBSim. Can anyone verify this? Is that being picked up
> some other way?
Ah, ok. I had this impression too. Therefore my question above.
And no, I can't find a place where the eyepoint is reported to FGInterface.
Greetings
Mathias
--
Mathias Fr�hlich, email: [EMAIL PROTECTED]
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