/******************************************************************************
*       SOFA, Simulation Open-Framework Architecture, development version     *
*                (c) 2006-2017 INRIA, USTL, UJF, CNRS, MGH                    *
*                                                                             *
* This program 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 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 Lesser General Public License *
* for more details.                                                           *
*                                                                             *
* You should have received a copy of the GNU Lesser General Public License    *
* along with this program. If not, see <http://www.gnu.org/licenses/>.        *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt)          *
*                                                                             *
* Contact information: contact@sofa-framework.org                             *
******************************************************************************/
#ifndef SOFA_COMPONENT_ENGINE_JOINPOINTS_H
#define SOFA_COMPONENT_ENGINE_JOINPOINTS_H
#include "config.h"

#if !defined(__GNUC__) || (__GNUC__ > 3 || (_GNUC__ == 3 && __GNUC_MINOR__ > 3))
#pragma once
#endif

#include <sofa/core/DataEngine.h>
#include <SofaBaseMechanics/MechanicalObject.h>
#include <sofa/helper/vector.h>

namespace sofa
{

namespace component
{

namespace engine
{

/*
 * This engine join points within a given distance, merging into a new point which is the "average point".
 */

template <class DataTypes>
class JoinPoints : public sofa::core::DataEngine
{
public:
    SOFA_CLASS(SOFA_TEMPLATE(JoinPoints,DataTypes),sofa::core::DataEngine);
    typedef typename DataTypes::Coord Coord;
    typedef typename DataTypes::VecCoord VecCoord;
    typedef typename DataTypes::Real Real;
    typedef sofa::defaulttype::Vec<3,Real> Vec3;

protected:

    JoinPoints();
    ~JoinPoints() {}
public:
    void init();
    void reinit();
    void update();

    virtual std::string getTemplateName() const
    {
        return templateName(this);
    }

    static std::string templateName(const JoinPoints<DataTypes>* = NULL)
    {
        return DataTypes::Name();
    }

    //Input
    Data<VecCoord > f_points;
    Data<Real> f_distance ;
    //Output
    Data<VecCoord > f_mergedPoints;



private:
    bool getNearestPoint(const typename std::list<Coord>::iterator &itCurrentPoint,
            std::list<Coord>& listPoints,
            std::list<int>& listCoeffs,
            typename std::list<Coord>::iterator &itNearestPoint,
            std::list<int>::iterator &itNearestCoeff,
            const Real& distance);

};

#if defined(SOFA_EXTERN_TEMPLATE) && !defined(SOFA_COMPONENT_ENGINE_JOINPOINTS_CPP)
#ifndef SOFA_FLOAT
extern template class SOFA_GENERAL_ENGINE_API JoinPoints<sofa::defaulttype::Vec3dTypes>;
#endif //SOFA_FLOAT
#ifndef SOFA_DOUBLE
extern template class SOFA_GENERAL_ENGINE_API JoinPoints<sofa::defaulttype::Vec3fTypes>;
#endif //SOFA_DOUBLE
#endif

} // namespace engine

} // namespace component

} // namespace sofa

#endif // SOFA_COMPONENT_ENGINE_JOINPOINTS_H
