Added support for shared JSBSim engine and system configurations in fgdata.

Adds $FG_ROOT/Aircraft/Generic/JSBSim/{Engines,Systems} to the JSBSim
engines and system search paths. Internally JSBSim already searches
$aircraft_dir/Engines and $aircraft_dir/Systems.
A file in $aircraft_dir/{Engines,Systems} have higher priority than one
in the shared directories.

diff --git a/src/FDM/JSBSim/JSBSim.cxx b/src/FDM/JSBSim/JSBSim.cxx
index 45b4b9e841f08004262844fc5a4b5c309d4ed2c8..03bc13dbeda1abf97e7b4eda2729b4621fd00229 100644 (file)
--- a/src/FDM/JSBSim/JSBSim.cxx
+++ b/src/FDM/JSBSim/JSBSim.cxx
@@ -215,11 +215,11 @@ FGJSBsim::FGJSBsim( double dt )
 
     SGPath aircraft_path( fgGetString("/sim/aircraft-dir") );
 
-    SGPath engine_path( fgGetString("/sim/aircraft-dir") );
-    engine_path.append( "Engine" );
+    SGPath engine_path( fgGetString("/sim/fg-root") );
+    engine_path.append( "Aircraft/Generic/JSBSim/Engines" );
 
-    SGPath systems_path( fgGetString("/sim/aircraft-dir") );
-    systems_path.append( "Systems" );
+    SGPath systems_path( fgGetString("/sim/fg-root") );
+    systems_path.append( "Aircraft/Generic/JSBSim/Systems" );
 
 // deprecate sim-time-sec for simulation/sim-time-sec
 // remove alias with increased configuration file version number (2.1 or later)