Hi Emmanuel,
good finding.
It seems, that I am mixing up different coordinate systems in line 389
of Rotorpart.cpp
float relgrav = Math::dot3(_normal,_rotor->getGravDirection());
While _normal is within the coordinate system of the helicopter,
_rotor->getGravDirection() is in the world coordinate system.
The enclosed patch should fix this. Unfortunately flightgear does not
run on my machine actually. I would be thankful, if someone could check,
if the patch works.
Best regards,
Maik
BARANGER Emmanuel schrieb am 21.02.2009 20:28:
Hi all,
After some tests, I just discovered something amusing in FG.
In fact, you do not know can be, but the gravity is reversed between
the northern hemisphere and southern hemisphere. Finally it is the
impression that it was ;)
Look the Bo105 in northen hemisphere : http://helijah.free.fr/LFKJ2.png
the same in southern hemisphere : http://helijah.free.fr/FACT2.png
Or the Aircrane (blades longer) in northen hemisphere :
http://helijah.free.fr/LFKJ.png
and in southern hemisphere : http://helijah.free.fr/FACT.png
Although this will not interfere with many of us. Many of us live in
the northern hemisphere. But what should we say to those who live in
the southern hemisphere ?
Funny is not it ?
Best regards. Emmanuel
--
BARANGER Emmanuel
http://helijah.free.fr
http://helijah.free.fr/flightgear/hangar.htm
http://helijah.free.fr/flightgear/H4-Hercules.htm
http://helijah.free.fr/flightgear/flightgear.htm
http://www.jamendo.com/fr/album/27163
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Index: Rotor.cpp
===================================================================
RCS file: /var/cvs/FlightGear-0.9/source/src/FDM/YASim/Rotor.cpp,v
retrieving revision 1.30
diff -u -p -r1.30 Rotor.cpp
--- Rotor.cpp 27 Jul 2008 16:25:15 -0000 1.30
+++ Rotor.cpp 22 Feb 2009 12:30:29 -0000
@@ -830,6 +830,7 @@ void Rotor::calcLiftFactor(float* v, flo
//store the gravity direction
Glue::geodUp(s->pos, _grav_direction);
+ s->velGlobalToLocal(_grav_direction, _grav_direction);
}
void Rotor::findGroundEffectAltitude(Ground * ground_cb,State *s)
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