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diff --git a/source/blender/freestyle/intern/stroke/Chain.h b/source/blender/freestyle/intern/stroke/Chain.h
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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_CHAIN_H__
+#define __FREESTYLE_CHAIN_H__
+
+/** \file blender/freestyle/intern/stroke/Chain.h
+ *  \ingroup freestyle
+ *  \brief Class to define a chain of viewedges.
+ *  \author Stephane Grabli
+ *  \date 09/01/2003
+ */
+
+#include "Curve.h"
+
+#include "../view_map/ViewMap.h"
+
+/*! Class to represent a 1D elements issued from the chaining process.
+ *  A Chain is the last step before the Stroke and is used in the Splitting and Creation processes.
+ */
+class Chain : public Curve
+{
+protected:
+	// tmp
+	Id * _splittingId;
+	FEdge *_fedgeB; // the last FEdge of the ViewEdge passed to the last call for push_viewedge_back().
+
+public:
+	/*! Defult constructor. */
+	Chain() : Curve()
+	{
+		_splittingId = 0;
+		_fedgeB = 0;
+	}
+
+	/*! Builds a chain from its Id. */
+	Chain(const Id& id) : Curve(id)
+	{
+		_splittingId = 0;
+		_fedgeB = 0;
+	}
+
+	/*! Copy Constructor */
+	Chain(const Chain& iBrother) : Curve(iBrother)
+	{
+		_splittingId = iBrother._splittingId;
+		_fedgeB = iBrother._fedgeB;
+	}
+
+	/*! Destructor. */
+	virtual ~Chain() {
+		// only the last splitted deletes this id
+		if (_splittingId) {
+			if (*_splittingId == _Id)
+				delete _splittingId;
+		}
+	}
+
+	/*! Returns the string "Chain" */
+	virtual string getExactTypeName() const
+	{
+		return "Chain";
+	}
+
+	/*! Adds a ViewEdge at the end of the chain
+	 *  \param iViewEdge
+	 *    The ViewEdge that must be added.
+	 *  \param orientation
+	 *    The orientation with which this ViewEdge must be processed.
+	 */
+	void push_viewedge_back(ViewEdge *iViewEdge, bool orientation);
+
+	/*! Adds a ViewEdge at the beginning of the chain
+	 *  \param iViewEdge
+	 *    The ViewEdge that must be added.
+	 *  \param orientation
+	 *    The orientation with which this ViewEdge must be processed.
+	 */
+	void push_viewedge_front(ViewEdge *iViewEdge, bool orientation);
+
+	inline void setSplittingId(Id *sid)
+	{
+		_splittingId = sid;
+	}
+
+	inline Id* getSplittingId()
+	{
+		return _splittingId;
+	}
+};
+
+#endif // __FREESTYLE_CHAIN_H__