Curtis L. Olson wrote:
> Andy Ross wrote:
> > Uh, stupid question: where do I stick the number? I can't imagine
> > this is difficult to fix.
>
> Should be a breeze.
>
> Essentially you are assuming that the runway elevation field in the
> FGInterface structure is getting updated externally by FlightGear, but
> FlightGear treats everything from FGInterface on down as 'read only'.
Roger that; I think I get it now. I don't have hardware at work to
test against, but if someone is in a rush and wants to guinea-pig for
a bit, the following patch to YASim.cxx should fix it. Comments in
JSBSim indicate that the scenery object is returning meters from MSL,
but I didn't investigate far enough to be sure I got the units right.
Andy
RCS file: /var/cvs/FlightGear-0.7/FlightGear/src/FDM/YASim/YASim.cxx,v
retrieving revision 1.8
diff -u -r1.8 YASim.cxx
--- YASim.cxx 24 Dec 2001 12:54:04 -0000 1.8
+++ YASim.cxx 15 Feb 2002 17:39:14 -0000
@@ -225,7 +225,11 @@
wind[0] = get_V_north_airmass() * FT2M;
wind[1] = get_V_east_airmass() * FT2M;
wind[2] = get_V_down_airmass() * FT2M;
- double ground = get_Runway_altitude() * FT2M;
+
+ // The ground elevation doesn't come from FGInterface; query it
+ // from the scenery and set it for others to find.
+ double ground = scenery.get_cur_elev();
+ set_Runway_altitude(ground * FT2M);
--
Andrew J. Ross NextBus Information Systems
Senior Software Engineer Emeryville, CA
[EMAIL PROTECTED] http://www.nextbus.com
"Men go crazy in conflagrations. They only get better one by one."
- Sting (misquoted)
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