Russell Suter <[EMAIL PROTECTED]> said: > Jon S Berndt wrote: > > > On Fri, 13 Feb 2004 08:22:15 -0800 > > Andy Ross <[EMAIL PROTECTED]> wrote: > > > >> Jon S. Berndt wrote: > >> > >>> Can the view offset or rendering code (whatever it is that draws the > >>> 3D aircraft models) move the origin of the set of vertices that > >>> defines the model per-frame so that the CG aligns with that reported > >>> by the FDM? > >> > >> > >> Well, yes, because they're just properties. But unless I > >> misunderstand you, you don't want to do that. The FDM reports the > >> lat/lon/alt of the aircraft coordinate origin, not the c.g., no? > >> > >> Andy > > > > > > No. > > > > JSBSim currently (the version in in FlightGear, anyhow), reports the > > position of the CG, since that is what the EOM natively tracks, > > anyhow. We can *report* anything, though of course, as we have > > intimate knowledge of euler angles, CG position, and offset from the > > CG (dynamic) to any other point on the aircraft at any time. > > So then the pilot's eyepoint is relative to the dynamic CG? I guess I > just assumed JSBSim reported a position from a > fixed point on the aircraft. Ack! Would your VRP then become the point > from which the pilot's eyepoint is derived?
That's the whole idea. The only real change is JSBSim will now be reporting aircraft position from a fixed location on the aircraft. Jon, I forget, what exactly is the reason for defining a VRP in the config file? I thought that JSBSim already knew where the nose was. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
