DistanceMapCalculator.hpp

/*

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*/
#ifndef DISTANCEMAPCALCULATOR_HPP_
#define DISTANCEMAPCALCULATOR_HPP_

#include <vector>
#include <queue>

#include "UblasIncludes.hpp"
#include "AbstractTetrahedralMesh.hpp"

template<unsigned ELEMENT_DIM, unsigned SPACE_DIM>
class DistanceMapCalculator
{
private:
    friend class TestDistanceMapCalculator;

    AbstractTetrahedralMesh<ELEMENT_DIM, SPACE_DIM>& mrMesh;
    unsigned mNumNodes;
    unsigned mLo;
    unsigned mHi;
    bool mWorkOnEntireMesh;
    unsigned *mNumHalosPerProcess;
    std::vector<unsigned> mHaloNodeIndices;
    unsigned mRoundCounter;
    unsigned mPopCounter;
    unsigned mTargetNodeIndex;
    bool mSingleTarget;
    c_vector<double, SPACE_DIM> mTargetNodePoint;

    std::priority_queue<std::pair<double, unsigned> > mActivePriorityNodeIndexQueue;

    bool WorkOnLocalQueue(std::vector<double>& rNodeDistances);

    bool UpdateQueueFromRemote(std::vector<double>& rNodeDistances);

    void PushLocal(double priority, unsigned nodeIndex)
    {

        if (mLo<=nodeIndex && nodeIndex<mHi)
        {
            //Push a negative priority so that the lowest one (nearest the surface) is popped first
            mActivePriorityNodeIndexQueue.push(std::pair<double, unsigned>(-priority, nodeIndex));
        }
    }

public:

    DistanceMapCalculator(AbstractTetrahedralMesh<ELEMENT_DIM, SPACE_DIM>& rMesh);

    ~DistanceMapCalculator()
    {
        delete [] mNumHalosPerProcess;
    }

    void ComputeDistanceMap(const std::vector<unsigned>& rSourceNodeIndices,
                            std::vector<double>& rNodeDistances);

    double SingleDistance(unsigned sourceNodeIndex, unsigned destinationNodeIndex);
};

#endif /*DISTANCEMAPCALCULATOR_HPP_*/