> > From: "Vivian Meazza" <[EMAIL PROTECTED]> > Date: 2005/08/11 Thu AM 07:26:23 EDT > To: "'FlightGear developers discussions'" <flightgear-devel@flightgear.org> > Subject: RE: [Flightgear-devel] Multiplayer Location Transformation to > Lat/Lon/Alt > > Alberico Family > > > Jim Wilson did a good job of pointing me in the right direction toward > > making views attached to players in a multiplayer scenario. > > > > I attack it today and made good progress, but remain bogged down by the > > transformations required. Bottom line is I need to take the 4x4 player > > position matrix and convert that to what is needed by the view properties > > (lat/lon/alt, etc.) The objective is to dynamically alter custom view(s), > > based on player positions(/orientation). > > > > A 2-part question, with hopes no one has to spend much time answering: > > 1.) Can someone point me to a good writeup on the details of the various > > coordinate systems and transformations in FG? (sorry: I'm sure that's > > been > > asked many times) > > 2.) Is there a utility method existing somewhere in the code already to do > > these specific transformations? It seems unlikely this is the first time > > someone is interested in taking the player positions and converting them > > to > > lat/lon/alt. > > > > Thanks in advance. Maybe this will all become clear to me after tomorrow > > morning's coffee(s). <sigh> > > Look in src/AIModel/AICarrier.cxx - there are several examples of > conversions from Cartesian co-ordinates to geodetic and vice versa. > > There are a wide range of utilities in simgear/math.cxx. The comments are in > the most part self-explanatory, so you will probably find what you need > there. > > Hope you succeed - we really need this one. > > Vivian >
Thanks, Vivian. Oops on the silly name (Alberico Family) on this account. :-) I'll take a look at AICarrier.cxx for conversion examples. Only 1/4 of the way thru the 1st coffee, so far. ;-) Jim (just Jim) _______________________________________________ Flightgear-devel mailing list Flightgear-devel@flightgear.org http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
