#include <Main/fg_props.hxx>
#include <Main/globals.hxx>
+#include <osg/Transform>
+#include <osg/observer_ptr>
+
#include <simgear/math/SGMath.hxx>
#include <simgear/nasal/cppbind/Ghost.hxx>
#include <simgear/scene/util/OsgDebug.hxx>
#include <simgear/scene/util/OsgMath.hxx>
#include <simgear/debug/logstream.hxx>
-#include <osg/Transform>
-
#include <boost/bind.hpp>
#include <algorithm>