Use the airport elevation instead of the actual ground elevation when out of visible...

diff --git a/src/ATC/AILocalTraffic.cxx b/src/ATC/AILocalTraffic.cxx
index 99a8aae8f4eeed50a26540c85cfaae5e23166690..3e0c87391ca40f4bfe245bca3dcc5ec47e612b76 100644 (file)
--- a/src/ATC/AILocalTraffic.cxx
+++ b/src/ATC/AILocalTraffic.cxx
@@ -38,6 +38,7 @@ during descent to avoid occasionally landing short or long.
 
 #include <Airports/runways.hxx>
 #include <Main/globals.hxx>
+#include <Main/viewer.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/tilemgr.hxx>
 #include <simgear/math/point3d.hxx>
@@ -1511,17 +1512,24 @@ void FGAILocalTraffic::Taxi(double dt) {
 // Either this function or the logic of how often it is called
 // will almost certainly change.
 void FGAILocalTraffic::DoGroundElev() {
-
        // It would be nice if we could set the correct tile center here in order to get a correct
        // answer with one call to the function, but what I tried in the two commented-out lines
        // below only intermittently worked, and I haven't quite groked why yet.
        //SGBucket buck(pos.lon(), pos.lat());
        //aip.getSGLocation()->set_tile_center(Point3D(buck.get_center_lon(), buck.get_center_lat(), 0.0));
        
+       // Only do the proper hitlist stuff if we are within visible range of the viewer.
        double visibility_meters = fgGetDouble("/environment/visibility-m");
+       FGViewer* vw = globals->get_current_view();
+       if(dclGetHorizontalSeparation(_pos, Point3D(vw->getLongitude_deg(), vw->getLatitude_deg(), 0.0)) > visibility_meters) {
+               _aip.getSGLocation()->set_cur_elev_m(aptElev);
+               return;
+       }
+       
+       
        //globals->get_tile_mgr()->prep_ssg_nodes( acmodel_location,
        globals->get_tile_mgr()->prep_ssg_nodes( _aip.getSGLocation(),  visibility_meters );
-        Point3D scenery_center = globals->get_scenery()->get_center();
+       Point3D scenery_center = globals->get_scenery()->get_center();
        globals->get_tile_mgr()->update( _aip.getSGLocation(), visibility_meters, (_aip.getSGLocation())->get_absolute_view_pos( scenery_center ) );
        // save results of update in SGLocation for fdm...