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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 HLAPerspectiveViewer_hxx
+#define HLAPerspectiveViewer_hxx
+
+#include "HLAEyeTracker.hxx"
+#include "HLAObjectReferenceData.hxx"
+#include "HLAView.hxx"
+#include "HLAViewer.hxx"
+
+namespace fgviewer {
+
+class HLAPerspectiveViewerClass;
+
+class HLAPerspectiveViewer : public HLAViewer {
+public:
+    HLAPerspectiveViewer(HLAPerspectiveViewerClass* objectClass, const SGWeakPtr<simgear::HLAFederate>& federate);
+    virtual ~HLAPerspectiveViewer();
+
+    virtual void createAttributeDataElements();
+
+    const HLAView* getView() const;
+    HLAView* getView();
+    void setView(HLAView* view);
+
+    const SGVec3d& getPosition() const
+    { return _position.getValue(); }
+    void setPosition(const SGVec3d& position)
+    { _position.setValue(position); }
+
+    const SGQuatd& getOrientation() const
+    { return _orientation.getValue(); }
+    void setOrientation(const SGQuatd& orientation)
+    { _orientation.setValue(orientation); }
+
+    double getZoomFactor() const
+    { return _zoomFactor.getValue(); }
+    void setZoomFactor(double zoomFactor)
+    { _zoomFactor.setValue(zoomFactor); }
+
+    const HLAEyeTracker* getEyeTracker() const;
+    HLAEyeTracker* getEyeTracker();
+    void setEyeTracker(HLAEyeTracker* eyeTracker);
+
+    SGLocationd getLocation(const SGTimeStamp& simTime) const;
+
+    SGVec3d getLeftEyeOffset() const;
+    SGVec3d getRightEyeOffset() const;
+
+private:
+    simgear::HLAObjectReferenceData<HLAView> _view;
+    simgear::HLAVec3dData _position;
+    simgear::HLAQuat3dData _orientation;
+    simgear::HLADoubleData _zoomFactor;
+    simgear::HLAObjectReferenceData<HLAEyeTracker> _eyeTracker;
+};
+
+} // namespace fgviewer
+
+#endif