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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __FREESTYLE_MODIFIERS_H__
+#define __FREESTYLE_MODIFIERS_H__
+
+/** \file blender/freestyle/intern/stroke/Modifiers.h
+ *  \ingroup freestyle
+ *  \brief modifiers...
+ *  \author Stephane Grabli
+ *  \date 05/01/2003
+ */
+
+#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