MonodomainStiffnessMatrixAssembler.hpp

/*

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*/

#ifndef MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_
#define MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_


#include "AbstractCardiacFeVolumeIntegralAssembler.hpp"
#include "HeartConfig.hpp"
#include "AbstractCardiacTissue.hpp"

template<unsigned ELEMENT_DIM, unsigned SPACE_DIM>
class MonodomainStiffnessMatrixAssembler
   : public AbstractCardiacFeVolumeIntegralAssembler<ELEMENT_DIM, SPACE_DIM, 1, false /*no vectors*/, true/*assembles matrices*/, NORMAL>
{
public:
    c_matrix<double,1*(ELEMENT_DIM+1),1*(ELEMENT_DIM+1)>
        ComputeMatrixTerm(
                c_vector<double, ELEMENT_DIM+1> &rPhi,
                c_matrix<double, SPACE_DIM, ELEMENT_DIM+1> &rGradPhi,
                ChastePoint<SPACE_DIM> &rX,
                c_vector<double,1> &rU,
                c_matrix<double, 1, SPACE_DIM> &rGradU /* not used */,
                Element<ELEMENT_DIM,SPACE_DIM>* pElement)
    {
        const c_matrix<double, SPACE_DIM, SPACE_DIM>& sigma_i = this->mpCardiacTissue->rGetIntracellularConductivityTensor(pElement->GetIndex());

        c_matrix<double, SPACE_DIM, ELEMENT_DIM+1> temp = prod(sigma_i, rGradPhi);
        c_matrix<double, ELEMENT_DIM+1, ELEMENT_DIM+1> grad_phi_sigma_i_grad_phi =
            prod(trans(rGradPhi), temp);

        return grad_phi_sigma_i_grad_phi;
    }

    MonodomainStiffnessMatrixAssembler(AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* pMesh,
                             AbstractCardiacTissue<ELEMENT_DIM,SPACE_DIM>* pTissue)
        : AbstractCardiacFeVolumeIntegralAssembler<ELEMENT_DIM,SPACE_DIM,1,false,true,NORMAL>(pMesh,pTissue)
    {
    }
};

#endif /*MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_*/