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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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+++ b/source/blender/freestyle/intern/stroke/Chain.h
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+//
+//  Filename         : Chain.h
+//  Author(s)        : Stephane Grabli
+//  Purpose          : Class to define a chain of viewedges.
+//  Date of creation : 09/01/2003
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  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  CHAIN_H
+# define CHAIN_H
+
+# include "../view_map/ViewMap.h"
+# include "Curve.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 // CHAIN_H