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diff --git a/source/blender/freestyle/intern/geometry/FastGrid.h b/source/blender/freestyle/intern/geometry/FastGrid.h
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+//
+//  Filename         : FastGrid.h
+//  Author(s)        : Stephane Grabli
+//  Purpose          : Class to define a cell grid surrounding the
+//                     bounding box of the scene
+//  Date of creation : 30/07/2002
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  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  FASTGRID_H
+# define FASTGRID_H
+
+# include "Grid.h"
+# include <cassert>
+/*! Class to define a regular grid used for ray
+ *  casting computations 
+ *  We don't use a hashtable here. The grid is 
+ *  explicitly stored for faster computations.
+ *  However, this might result in significant
+ *  increase in memory usage (compared to the regular grid)
+ */
+
+class LIB_GEOMETRY_EXPORT FastGrid : public Grid
+{
+ public:
+
+  FastGrid() : Grid() {
+    _cells = NULL;
+    _cells_size = 0;
+  }
+  
+  virtual ~FastGrid() {
+    clear();
+  }
+
+  /*! clears the grid
+   *  Deletes all the cells, clears the hashtable,
+   *  resets size, size of cell, number of cells.
+   */
+  virtual void clear();
+  
+  /*! Sets the different parameters of the grid
+   *    orig
+   *      The grid origin
+   *    size
+   *      The grid's dimensions
+   *    nb
+   *      The number of cells of the grid
+   */
+  virtual void configure(const Vec3r& orig, const Vec3r& size, unsigned nb);
+  
+  /*! returns the cell whose coordinates are pased as argument */
+  Cell* getCell(const Vec3u& p) ;
+ 
+  /*! Fills the case p with the cell iCell */
+  virtual void fillCell(const Vec3u& p, Cell& cell);
+
+protected:
+
+  Cell**	_cells;
+  unsigned	_cells_size;
+};
+
+#endif // FASTGRID_H