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+// Copyright (C) 2009 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef HLASceneObject_hxx
+#define HLASceneObject_hxx
+
+#include <osg/Node>
+#include <osg/PagedLOD>
+#include <osg/ref_ptr>
+
+#include <simgear/hla/HLAObjectClass.hxx>
+#include <simgear/hla/HLALocation.hxx>
+
+#include "HLAObjectReferenceData.hxx"
+
+namespace fgviewer {
+
+class HLASceneObjectClass;
+
+class HLASceneObject : public simgear::HLAObjectInstance {
+public:
+    HLASceneObject(HLASceneObjectClass* objectClass, const SGWeakPtr<simgear::HLAFederate>& federate);
+    virtual ~HLASceneObject();
+
+    virtual void createAttributeDataElements();
+
+    virtual void discoverInstance(const simgear::RTIData& tag);
+    virtual void removeInstance(const simgear::RTIData& tag);
+
+    virtual void registerInstance(simgear::HLAObjectClass* objectClass);
+    virtual void deleteInstance(const simgear::RTIData& tag);
+
+    const HLASceneObject* getSceneObject() const;
+    HLASceneObject* getSceneObject();
+    void setSceneObject(HLASceneObject* sceneObject);
+
+    virtual SGLocationd getLocation(const SGTimeStamp& timeStamp) const;
+
+    simgear::HLADataElement* getModelDataElement();
+
+    osg::Node* getNode();
+
+protected:
+    SGLocationd _getRelativeLocation(const SGTimeStamp& timeStamp) const;
+    // Return the velocities of this current object without taking the referenced velocities into account
+    SGVec3d _getRelativeAngularVelocity() const;
+    SGVec3d _getRelativeLinearVelocity() const;
+
+    void _setModelFileName(const std::string& fileName);
+
+private:
+    class _ModelDataElement;
+    class _Transform;
+
+    // Add the transform node to the scenegraph
+    void _addToSceneGraph();
+    // Remove the transform node from the scenegraph
+    void _removeFromSceneGraph();
+
+    // The location of this object
+    SGSharedPtr<simgear::HLAAbstractLocation> _location;
+    // If this object is living relative to an other one, this one is non zero
+    simgear::HLAObjectReferenceData<HLASceneObject> _sceneObject;
+
+    // The top level transform node for this scene object
+    osg::ref_ptr<_Transform> _transform;
+    osg::ref_ptr<osg::PagedLOD> _pagedLOD;
+};
+
+} // namespace fgviewer
+
+#endif