Re: [Flightgear-devel] Coordinate Systems

[Curtis L. O. <cu...@fl...>]

Michael Maier writes:
> I working on an airship simulation and I am trying to connect the
> Flight Gear scenery with my simulation. I have some problems with
> the coordinates. Can you please help me to find the transfer
> function from the velocity I get from my simulation to the
> coordinates of the world systems of Flight Gear.  Thanks a lot for
> your help.

If you can convert your coordinates to longitude, latitude, and
altitude, then you should be able to render your position pretty
easily in FlightGear.  

If you are wondering how to calculate a new lon/lat in a wgs_84 world
given a heading and velocity, have a look at
simgear/math/sg_geodesy.hxx.  If you want to just use a spherical
world, have a look at simgear/math/polar3d.hxx.  

However, I'm the last one you want to ask advice on building your
flight model.  I imagine their are better/more efficient ways to do
this so that you just do this expensive conversion of coordinate
systems once in the end???

Regards,

Curt.
-- 
Curtis Olson   Human Factors Research Lab       FlightGear Project
Twin Cities    cu...@hf...                cu...@fl...
Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org