Jim: I don't know if you noticed, but Mathias Frohlich pointed out some adjustments that were needed in our new Visual Reference Point calculation, which I have now taken care of. The position as reported in JSBSim.cxx must be changed to the method that is currently commented out (from JSBSim CVS). Also, we must actually report the VRP in our JSBSim aircraft config files. This will involve incrementing of our config file format version number to 1.61 - at which time it will be critical to post new aircraft FDM models and code changes to FlightGear CVS repositories simultaneously.
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. 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. 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? Jon _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
