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diff --git a/source/blender/freestyle/intern/geometry/FastGrid.cpp b/source/blender/freestyle/intern/geometry/FastGrid.cpp
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+++ b/source/blender/freestyle/intern/geometry/FastGrid.cpp
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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 *****
+ */
+
+/** \file blender/freestyle/intern/geometry/FastGrid.h
+ *  \ingroup freestyle
+ *  \brief Class to define a cell grid surrounding the bounding box of the scene
+ *  \author Stephane Grabli
+ *  \date 30/07/2002
+ */
+
+#include "FastGrid.h"
+
+#include "BKE_global.h"
+
+void FastGrid::clear()
+{
+	if (!_cells)
+		return;
+
+	for (unsigned int i = 0; i < _cells_size; i++) {
+		if (_cells[i])
+			delete _cells[i];
+	}
+	delete[] _cells;
+	_cells = NULL;
+	_cells_size = 0;
+
+	Grid::clear();
+}
+
+void FastGrid::configure(const Vec3r& orig, const Vec3r& size, unsigned nb)
+{
+	Grid::configure(orig, size, nb);
+	_cells_size = _cells_nb[0] * _cells_nb[1] * _cells_nb[2];
+	_cells = new Cell*[_cells_size];
+	memset(_cells, 0, _cells_size * sizeof(*_cells));
+}
+
+Cell *FastGrid::getCell(const Vec3u& p)
+{
+#if 0
+	if (G.debug & G_DEBUG_FREESTYLE) {
+		cout << _cells << " " << p << " " << _cells_nb[0] << "-" << _cells_nb[1] << "-" << _cells_nb[2]
+		     << " " << _cells_size << endl;
+	}
+#endif
+	assert(_cells || ("_cells is a null pointer"));
+	assert((_cells_nb[0] * (p[2] * _cells_nb[1] + p[1]) + p[0]) < _cells_size);
+	assert(p[0] < _cells_nb[0]);
+	assert(p[1] < _cells_nb[1]);
+	assert(p[2] < _cells_nb[2]);
+	return _cells[_cells_nb[0] * (p[2] * _cells_nb[1] + p[1]) + p[0]];
+}
+
+void FastGrid::fillCell(const Vec3u& p, Cell& cell)
+{
+	assert(_cells || ("_cells is a null pointer"));
+	assert((_cells_nb[0] * (p[2] * _cells_nb[1] + p[1]) + p[0]) < _cells_size);
+	assert(p[0] < _cells_nb[0]);
+	assert(p[1] < _cells_nb[1]);
+	assert(p[2] < _cells_nb[2]);
+	_cells[_cells_nb[0] * (p[2] * _cells_nb[1] + p[1]) + p[0]] = &cell;
+}