"Curtis L. Olson" wrote: > > Norman Vine writes: > > Christian Mayer writes: > > > > > >Norman Vine wrote: > > >> > > >> Christian Mayer writes: > > >> > > > >> >Norman Vine wrote: > > >> >> > > >> >> Well if you just wanted to drift with the wind and be 'cheesy' > > >> >> you could use the simgear direct geodetic solver to get a new lat lon > > >> >> based on current position speed and course > > >> > > >> int geo_direct_wgs_84 ( double alt, double lat1, double > > >> > > >> Need anything else ?? > > > > > >Thnks, that should do the job. > > > > The 'Brakes' could work as a simulated 'tethering device' < anchor > > > while on the ground :-) > > One thing I've noticed (from the magic carpet mode) is that if you > call geo_direct_wgs_84() with zero distance and zero direction > (i.e. zero velocity) you don't get *exactly* the starting lat/lon back > because of numerical precision issues. This is not a big deal at > higher velocities, but is a problem at very slow velocities.
Thanks, I'll take care of that (although they are used to race balloons aren't that fast...) CU, Christian -- The idea is to die young as late as possible. -- Ashley Montague Whoever that is/was; (c) by Douglas Adams would have been better... _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
