FineCoarseMeshPair.hpp

/*

Copyright (C) University of Oxford, 2005-2011

University of Oxford means the Chancellor, Masters and Scholars of the
University of Oxford, having an administrative office at Wellington
Square, Oxford OX1 2JD, UK.

This file is part of Chaste.

Chaste 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.

Chaste 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. The offer of Chaste under the terms of the
License is subject to the License being interpreted in accordance with
English Law and subject to any action against the University of Oxford
being under the jurisdiction of the English Courts.

You should have received a copy of the GNU Lesser General Public License
along with Chaste. If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef FINECOARSEMESHPAIR_HPP_
#define FINECOARSEMESHPAIR_HPP_

#include "TetrahedralMesh.hpp"
#include "QuadraticMesh.hpp"
#include "BoxCollection.hpp"
#include "QuadraturePointsGroup.hpp"
#include "GaussianQuadratureRule.hpp"
#include "Warnings.hpp"

//#define FINECOARSEMESHPAIR_VERBOSE

template<unsigned DIM>
struct ElementAndWeights
{
    unsigned ElementNum; 
    c_vector<double,DIM+1> Weights; 
};

template <unsigned DIM>
class FineCoarseMeshPair
{
friend class TestFineCoarseMeshPair;

private:

    TetrahedralMesh<DIM,DIM>& mrFineMesh;

    TetrahedralMesh<DIM,DIM>& mrCoarseMesh;

    BoxCollection<DIM>* mpFineMeshBoxCollection;

    BoxCollection<DIM>* mpCoarseMeshBoxCollection;

    std::vector<ElementAndWeights<DIM> > mFineMeshElementsAndWeights;

    std::vector<unsigned> mNotInMesh;

    std::vector<c_vector<double,DIM+1> > mNotInMeshNearestElementWeights;

//    /** 4 values,
//     *   [0] number of points for which the containing element was found quickly (the element was
//     *       in the same box as the point,
//     *   [1] number of points for which the containing element was found more slowly (the element
//     *       was not the same box as the point, but one of the neighbouring boxes),
//     *   [2] num points found very slowly (the elemment was not in a neighbouring box, but somewhere else)
//     *   [3] num points not in the searched mesh at all
//     *
//     *  Note mCounters[3] = mNotInMesh.size() = mNotInMeshNearestElementWeights.size();
//     */
//    std::vector<unsigned> mStatisticsCounters;

    std::vector<unsigned> mStatisticsCounters;

    std::vector<unsigned> mCoarseElementsForFineNodes;

    std::vector<unsigned> mCoarseElementsForFineElementCentroids;

    void ComputeFineElementAndWeightForGivenPoint(ChastePoint<DIM>& rPoint,
                                                  bool safeMode,
                                                  unsigned boxForThisPoint,
                                                  unsigned index);

    unsigned ComputeCoarseElementForGivenPoint(ChastePoint<DIM>& rPoint,
                                               bool safeMode,
                                               unsigned boxForThisPoint);

    void SetUpBoxes(TetrahedralMesh<DIM,DIM>& rMesh,
                    double boxWidth,
                    BoxCollection<DIM>*& rpBoxCollection);

    void CollectElementsInContainingBox(BoxCollection<DIM>*& rpBoxCollection,
                                        unsigned boxIndex,
                                        std::set<unsigned>& rElementIndices);
    void CollectElementsInLocalBoxes(BoxCollection<DIM>*& rpBoxCollection,
                                     unsigned boxIndex,
                                     std::set<unsigned>& rElementIndices);

    void ResetStatisticsVariables();

public:

    FineCoarseMeshPair(TetrahedralMesh<DIM,DIM>& rFineMesh, TetrahedralMesh<DIM,DIM>& rCoarseMesh);

    ~FineCoarseMeshPair();

    void SetUpBoxesOnFineMesh(double boxWidth = -1);

    void SetUpBoxesOnCoarseMesh(double boxWidth = -1);

    void ComputeFineElementsAndWeightsForCoarseQuadPoints(GaussianQuadratureRule<DIM>& rQuadRule,
                                                          bool safeMode);

    void ComputeFineElementsAndWeightsForCoarseNodes(bool safeMode);

    void PrintStatistics();

    void ComputeCoarseElementsForFineNodes(bool safeMode);

    void ComputeCoarseElementsForFineElementCentroids(bool safeMode);

    std::vector<ElementAndWeights<DIM> >& rGetElementsAndWeights()
    {
        return mFineMeshElementsAndWeights;
    }

    std::vector<unsigned>& rGetCoarseElementsForFineNodes()
    {
        assert(mCoarseElementsForFineNodes.size() > 0);
        return mCoarseElementsForFineNodes;
    }

    std::vector<unsigned>& rGetCoarseElementsForFineElementCentroids()
    {
        assert(mCoarseElementsForFineElementCentroids.size() > 0);
        return mCoarseElementsForFineElementCentroids;
    }

    void DeleteFineBoxCollection();

    void DeleteCoarseBoxCollection();
};

#endif /*FINECOARSEMESHPAIR_HPP_*/