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+//
+//  Written by David Megginson, started January 2000.
+//  Adopted for standalone fgpanel application by Torsten Dreyer, August 2009
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License as
+//  published by the Free Software Foundation; either version 2 of the
+//  License, or (at your option) any later version.
+//
+//  This program 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
+//  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 FGPANELTRANSFORMATION_HXX
+#define FGPANELTRANSFORMATION_HXX
+
+#include <simgear/math/interpolater.hxx>
+#include <simgear/props/condition.hxx>
+#include <simgear/props/props.hxx>
+
+/**
+ * A transformation for a layer.
+ */
+class FGPanelTransformation : public SGConditional {
+public:
+  enum Type {
+    XSHIFT,
+    YSHIFT,
+    ROTATION
+  };
+
+  FGPanelTransformation ();
+  virtual ~FGPanelTransformation ();
+
+  Type type;
+  SGConstPropertyNode_ptr node;
+  float min;
+  float max;
+  bool has_mod;
+  float mod;
+  float factor;
+  float offset;
+  SGInterpTable *table;
+};
+
+#endif