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diff --git a/source/blender/freestyle/intern/stroke/Modifiers.h b/source/blender/freestyle/intern/stroke/Modifiers.h
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+//
+//  Filename         : Modifiers.h
+//  Author           : Stephane Grabli
+//  Purpose          : modifiers...
+//  Date of creation : 05/01/2003
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  Copyright (C) : Please refer to the COPYRIGHT file distributed 
+//   with this source distribution. 
+//
+//  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef  MODIFIERS_H
+# define MODIFIERS_H
+
+# include "TimeStamp.h"
+
+/* ----------------------------------------- *
+ *                                           *
+ *              modifiers                 *
+ *                                           *
+ * ----------------------------------------- */
+/*! Base class for modifiers.
+ *  Modifiers are used in the
+ *  Operators in order to "mark"
+ *  the processed Interface1D.
+ */
+template<class Edge>
+struct EdgeModifier : public unary_function<Edge,void>
+{
+  /*! Default construction */
+  EdgeModifier() : unary_function<Edge,void>() {}
+  /*! the () operator */
+  virtual void operator()(Edge& iEdge) {}
+};
+
+/*! Modifier that sets the time stamp
+ *  of an Interface1D to the time stamp
+ *  of the system.
+ */
+template<class Edge>
+struct TimestampModifier : public EdgeModifier<Edge>
+{
+  /*! Default constructor */
+  TimestampModifier() : EdgeModifier<Edge>() {}
+  /*! The () operator. */
+  virtual void operator()(Edge& iEdge) 
+  {
+    TimeStamp *timestamp = TimeStamp::instance();
+    iEdge.SetTimeStamp(timestamp->getTimeStamp());
+  }
+};
+
+#endif // MODIFIERS_H