FasterCard/DiffusiveCurrent.cpp at main · cesare-corrado/FasterCard · GitHub

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#include<iostream>
#include<cstdlib>
#include "DiffusiveCurrent.hpp"
#include "GeometricEntities.hpp"
#include "LocalMatrices.hpp"
#include "CSROperators.hpp"
#include "Chrono.hpp"
#include "ProxyFunctions.hpp"

DiffusiveCurrent::DiffusiveCurrent()
:_ptrmesh(NULL),
_data(NULL),
_ptrIdiff(NULL),
_ptrVmn(NULL)
{
    _condmatrix.clear(1);
}


DiffusiveCurrent::~DiffusiveCurrent()
{
    clear();
}


void DiffusiveCurrent::clear()
{
    _condmatrix.clear(1);
    _ptrmesh = NULL;
    _data = NULL;
    _ptrIdiff=NULL;
    _ptrVmn=NULL;
}


void DiffusiveCurrent::initialize()
{
    if( (_ptrmesh != NULL) && (_data != NULL) )
    {
        Chrono chrono;
        chrono.start();
        // Mesh connectivity does not furnishes connections of the point with itself, hence flag to true
        _condmatrix.initialize_matrix(_ptrmesh->pointConnectivity(), true);
        CSRMatrix massmatrix;
        massmatrix.duplicate(_condmatrix);

        //now I assemble
        LocalMatrices locmat(_ptrmesh,_data);
        switch(_ptrmesh->spacedim_GeoEle())
        {
            case 1:
            {
                for(size_t iEdg=0; iEdg<_ptrmesh->num_Edges(); iEdg++)
                {
                    const Element & Ele=_ptrmesh->Edg(iEdg);
                    std::vector<double> locstiff=locmat.aniso_local_stiffness(Ele, Ele, Ele.QuadRule(0));
                    std::vector<double> locmass=locmat.local_mass(Ele, Ele, Ele.QuadRule(1));
                    assemble(Ele,  locstiff,  _condmatrix);
                    assemble(Ele,  locmass,   massmatrix);
                }
                break;
            }
            case 2:
            {
                for(size_t iTria=0; iTria<_ptrmesh->num_Trias(); iTria++)
                {
                    const Element & Ele=_ptrmesh->Tri(iTria);
                    std::vector<double> locstiff=locmat.aniso_local_stiffness(Ele, Ele, Ele.QuadRule(0));
                    std::vector<double> locmass=locmat.local_mass(Ele, Ele, Ele.QuadRule(1));
                    assemble(Ele,  locstiff, _condmatrix);
                    assemble(Ele,  locmass,   massmatrix);
                }
                for(size_t iQuad=0; iQuad<_ptrmesh->num_Quads(); iQuad++)
                {
                    const Element & Ele=_ptrmesh->Quad(iQuad);
                    std::vector<double> locstiff=locmat.aniso_local_stiffness(Ele, Ele, Ele.QuadRule(1));
                    std::vector<double> locmass=locmat.local_mass(Ele, Ele, Ele.QuadRule(1));
                    assemble(Ele,  locstiff, _condmatrix);
                    assemble(Ele,  locmass,   massmatrix);
                }
                break;
            }
            case 3:
            {
                for(size_t iTetra=0; iTetra<_ptrmesh->num_Tetras(); iTetra++)
                {
                    const Element & Ele=_ptrmesh->Tet(iTetra);
                    std::vector<double> locstiff=locmat.aniso_local_stiffness(Ele, Ele, Ele.QuadRule(0));
                    std::vector<double> locmass=locmat.local_mass(Ele, Ele, Ele.QuadRule(1));
                    assemble(Ele,  locstiff, _condmatrix);
                    assemble(Ele,  locmass,   massmatrix);
                }
                for(size_t iHexa=0; iHexa<_ptrmesh->num_Hexas(); iHexa++)
                {
                    const Element & Ele=_ptrmesh->Hex(iHexa);
                    std::vector<double> locstiff=locmat.aniso_local_stiffness(Ele, Ele, Ele.QuadRule(1));
                    std::vector<double> locmass=locmat.local_mass(Ele, Ele, Ele.QuadRule(1));
                    assemble(Ele,  locstiff, _condmatrix);
                    assemble(Ele,  locmass,   massmatrix);
                }
                break;
            }
            default:
            {
                std::cerr<<"ERROR: UNKNOWN GEOMETRIC ELEMENT DIMENSION"<<std::endl;
                exit(1);
                break;
            }
        }
        std::vector<double> mlumped=lumping(massmatrix);

        // Now divide by Mlumped
        alphInvMlumpAij(_condmatrix, mlumped, -1.0 );
        chrono.stop();
        std::cout<<"diffusive current operator evaluated in "<<chrono<<std::endl;
    }
    else
    {
        std::cerr<<"ERROR: DATA AND/OR MESH ARE NOT INITIALIZED"<<std::endl;
        exit(1);
    }
}


void DiffusiveCurrent::compute()
{
    matrixVectorProd(_condmatrix, (*_ptrVmn), (*_ptrIdiff) );
}


// Private functions
void DiffusiveCurrent::assemble(const Element & VarEle,  const std::vector<double> & lstif, CSRMatrix & globalmat)
{
    for(short int irow=0; irow<VarEle.nbV();irow++)
    {
        globalmat.addEntry(VarEle.vertices(irow), VarEle.vertices(irow), lstif[RMIndex(irow,irow,VarEle.nbV())] );
        for(short int jcol=irow+1; jcol<VarEle.nbV();jcol++)
        {
            globalmat.addEntry(VarEle.vertices(irow), VarEle.vertices(jcol), lstif[RMIndex(irow,jcol,VarEle.nbV())] );
            globalmat.addEntry(VarEle.vertices(jcol), VarEle.vertices(irow), lstif[RMIndex(jcol,irow,VarEle.nbV())] );
        }
    }
}


std::vector<double> DiffusiveCurrent::lumping(const CSRMatrix & matrix_to_lump)
{
        //it works only for square matrices.
        // It multiplies the matrix by a vector made of 1 only. This corresponds to sum up a row
        std::vector<double> mlumped(matrix_to_lump.nrows(),0.0);
        std::vector<double> tmpRHS(matrix_to_lump.nrows(),1.0);
        matrixVectorProd(matrix_to_lump, tmpRHS, mlumped );
        return(mlumped);
}