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/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
* Copyright (C) 2009-2011, IGG Team, LSIIT, University of Strasbourg           *
*                                                                              *
* This library is free software; you can redistribute it and/or modify it      *
* under the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* This library 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 Lesser General Public License  *
* for more details.                                                            *
*                                                                              *
* You should have received a copy of the GNU Lesser General Public License     *
* along with this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
* Web site: http://cgogn.u-strasbg.fr/                                         *
* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

#ifndef __FILTERING_FUNCTORS_H__
#define __FILTERING_FUNCTORS_H__

#include "Topology/generic/functor.h"

namespace CGoGN
{

namespace Algo
{

namespace Filtering
{

template <typename MAP, typename T>
class FunctorAverage : public FunctorMap<MAP>
{
protected:
	const AttributeHandler<T>& attr ;
	T sum ;
	unsigned int count ;
public:
	FunctorAverage(MAP& map, const AttributeHandler<T>& a) : FunctorMap<MAP>(map), attr(a), sum(0), count(0)
	{}
	bool operator()(Dart d)
	{
		sum += attr[d] ;
		++count ;
		return false ;
	}
	inline void reset() { sum = T(0) ; count = 0 ; }
	inline T getSum() { return sum ; }
	inline T getAverage() { return sum / typename T::DATA_TYPE(count) ; }
} ;

} // namespace Filtering

} // namespace Algo

} // namespace CGoGN

#endif