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diff --git a/source/blender/freestyle/intern/view_map/HeuristicGridDensityProviderFactory.cpp b/source/blender/freestyle/intern/view_map/HeuristicGridDensityProviderFactory.cpp
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+//
+//  Filename         : HeuristicGridDensityProviderFactory.cpp
+//  Author(s)        : Alexander Beels
+//  Purpose          : Class to define a cell grid surrounding
+//                     the projected image of a scene
+//  Date of creation : 2011-2-8
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  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.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "HeuristicGridDensityProviderFactory.h"
+
+HeuristicGridDensityProviderFactory::HeuristicGridDensityProviderFactory(real sizeFactor, unsigned numFaces)
+	: sizeFactor(sizeFactor), numFaces(numFaces)
+{
+}
+
+HeuristicGridDensityProviderFactory::~HeuristicGridDensityProviderFactory () {}
+
+auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const real proscenium[4]) 
+{
+	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, proscenium, sizeFactor));
+	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, proscenium, numFaces));
+	if ( avg->cellSize() > p23->cellSize() ) {
+		return (auto_ptr<GridDensityProvider>) p23;
+	} else {
+		return (auto_ptr<GridDensityProvider>) avg;
+	}
+}
+
+auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox, const GridHelpers::Transform& transform) 
+{
+	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, bbox, transform, sizeFactor));
+	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, bbox, transform, numFaces));
+	if ( avg->cellSize() > p23->cellSize() ) {
+		return (auto_ptr<GridDensityProvider>) p23;
+	} else {
+		return (auto_ptr<GridDensityProvider>) avg;
+	}
+}
+
+auto_ptr<GridDensityProvider> HeuristicGridDensityProviderFactory::newGridDensityProvider(OccluderSource& source) 
+{
+	real proscenium[4];
+	GridDensityProvider::calculateOptimalProscenium(source, proscenium);
+	auto_ptr<AverageAreaGridDensityProvider> avg(new AverageAreaGridDensityProvider(source, proscenium, sizeFactor));
+	auto_ptr<Pow23GridDensityProvider> p23(new Pow23GridDensityProvider(source, proscenium, numFaces));
+	if ( avg->cellSize() > p23->cellSize() ) {
+		return (auto_ptr<GridDensityProvider>) p23;
+	} else {
+		return (auto_ptr<GridDensityProvider>) avg;
+	}
+}
+