Nektar::Collections::PhysDeriv_StdMat Class Reference

Phys deriv operator using standard matrix approach. More...

Inheritance diagram for Nektar::Collections::PhysDeriv_StdMat:

Public Member Functions
	~PhysDeriv_StdMat () final=default
void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output0, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp) final
	Perform operation.
void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp) final
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< LocalRegions::ExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
	Constructor.
virtual	~Operator ()=default
virtual COLLECTIONS_EXPORT void	UpdateFactors (StdRegions::FactorMap factors)
	Update the supplied factor map.
virtual COLLECTIONS_EXPORT void	UpdateVarcoeffs (StdRegions::VarCoeffMap &varcoeffs)
	Update the supplied variable coefficients.
unsigned int	GetWspSize ()
	Get the size of the required workspace.
unsigned int	GetNumElmt ()
	Get number of elements.
StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer.
unsigned int	GetInputSize (void)
unsigned int	GetOutputSize (void)
unsigned int	GetPhysSize (void)
unsigned int	GetCoeffSize (void)

Protected Attributes
Array< OneD, DNekMatSharedPtr >	m_derivMat
Array< TwoD, const NekDouble >	m_derivFac
int	m_dim
int	m_coordim
Protected Attributes inherited from Nektar::Collections::Operator
bool	m_isDeformed
StdRegions::StdExpansionSharedPtr	m_stdExp
unsigned int	m_numElmt
	number of elements that the operator is applied on
unsigned int	m_nqe
unsigned int	m_wspSize
unsigned int	m_inputSize
	number of modes or quadrature points that are passed as input to an operator
unsigned int	m_outputSize
	number of modes or quadrature points that are taken as output from an operator

Private Member Functions
	PhysDeriv_StdMat (vector< LocalRegions::ExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData, StdRegions::FactorMap factors)

Additional Inherited Members
Protected Member Functions inherited from Nektar::Collections::PhysDeriv_Helper
	PhysDeriv_Helper ()

Detailed Description

Phys deriv operator using standard matrix approach.

Definition at line 79 of file PhysDeriv.cpp.

Constructor & Destructor Documentation

~PhysDeriv_StdMat()

Nektar::Collections::PhysDeriv_StdMat::~PhysDeriv_StdMat ( )

finaldefault

PhysDeriv_StdMat()

Nektar::Collections::PhysDeriv_StdMat::PhysDeriv_StdMat ( vector< LocalRegions::ExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData, StdRegions::FactorMap  factors  )

inlineprivate

Definition at line 203 of file PhysDeriv.cpp.

        : Operator(pCollExp, pGeomData, factors), PhysDeriv_Helper()
    {
        int nqtot = pCollExp[0]->GetTotPoints();
        m_dim     = pCollExp[0]->GetShapeDimension();
        m_coordim = pCollExp[0]->GetCoordim();
 
        // set up a PhysDeriv StdMat.
        m_derivMat = Array<OneD, DNekMatSharedPtr>(m_dim);
        for (int i = 0; i < m_dim; ++i)
        {
            Array<OneD, NekDouble> tmp(nqtot), tmp1(nqtot);
            m_derivMat[i] =
                MemoryManager<DNekMat>::AllocateSharedPtr(nqtot, nqtot);
            for (int j = 0; j < nqtot; ++j)
            {
                Vmath::Zero(nqtot, tmp, 1);
                tmp[j] = 1.0;
                m_stdExp->PhysDeriv(i, tmp, tmp1);
                Vmath::Vcopy(nqtot, &tmp1[0], 1,
                             &(m_derivMat[i]->GetPtr())[0] + j * nqtot, 1);
            }
        }
        m_derivFac = pGeomData->GetDerivFactors(pCollExp);
        m_wspSize  = 3 * nqtot * m_numElmt;
    }

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), m_coordim, m_derivFac, m_derivMat, m_dim, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_stdExp, Nektar::Collections::Operator::m_wspSize, Vmath::Vcopy(), and Vmath::Zero().

Member Function Documentation

operator()() [1/2]

void Nektar::Collections::PhysDeriv_StdMat::operator() ( const Array< OneD, const NekDouble > &  input, Array< OneD, NekDouble > &  output0, Array< OneD, NekDouble > &  output1, Array< OneD, NekDouble > &  output2, Array< OneD, NekDouble > &  wsp  )

inlinefinalvirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 87 of file PhysDeriv.cpp.

    {
        int nPhys = m_stdExp->GetTotPoints();
        int ntot  = m_numElmt * nPhys;
        Array<OneD, NekDouble> tmp0, tmp1, tmp2;
        Array<OneD, Array<OneD, NekDouble>> Diff(3);
        Array<OneD, Array<OneD, NekDouble>> out(3);
        out[0] = output0;
        out[1] = output1;
        out[2] = output2;
 
        for (int i = 0; i < m_dim; ++i)
        {
            Diff[i] = wsp + i * ntot;
        }
 
        // calculate local derivatives
        for (int i = 0; i < m_dim; ++i)
        {
            Blas::Dgemm('N', 'N', m_derivMat[i]->GetRows(), m_numElmt,
                        m_derivMat[i]->GetColumns(), 1.0,
                        m_derivMat[i]->GetRawPtr(), m_derivMat[i]->GetRows(),
                        input.data(), nPhys, 0.0, &Diff[i][0], nPhys);
        }
 
        // calculate full derivative
        if (m_isDeformed)
        {
            for (int i = 0; i < m_coordim; ++i)
            {
                Vmath::Zero(ntot, out[i], 1);
                for (int j = 0; j < m_dim; ++j)
                {
                    Vmath::Vvtvp(ntot, m_derivFac[i * m_dim + j], 1, Diff[j], 1,
                                 out[i], 1, out[i], 1);
                }
            }
        }
        else
        {
            Array<OneD, NekDouble> t;
            for (int i = 0; i < m_coordim; ++i)
            {
                Vmath::Zero(ntot, out[i], 1);
                for (int e = 0; e < m_numElmt; ++e)
                {
                    for (int j = 0; j < m_dim; ++j)
                    {
                        Vmath::Svtvp(m_nqe, m_derivFac[i * m_dim + j][e],
                                     Diff[j] + e * m_nqe, 1, out[i] + e * m_nqe,
                                     1, t = out[i] + e * m_nqe, 1);
                    }
                }
            }
        }
    }

References Blas::Dgemm(), m_coordim, m_derivFac, m_derivMat, m_dim, Nektar::Collections::Operator::m_isDeformed, Nektar::Collections::Operator::m_nqe, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_stdExp, Vmath::Svtvp(), Vmath::Vvtvp(), and Vmath::Zero().

operator()() [2/2]

void Nektar::Collections::PhysDeriv_StdMat::operator() ( int  dir, const Array< OneD, const NekDouble > &  input, Array< OneD, NekDouble > &  output, Array< OneD, NekDouble > &  wsp  )

inlinefinalvirtual

Implements Nektar::Collections::Operator.

Definition at line 148 of file PhysDeriv.cpp.

    {
        int nPhys = m_stdExp->GetTotPoints();
        int ntot  = m_numElmt * nPhys;
        Array<OneD, NekDouble> tmp0, tmp1, tmp2;
        Array<OneD, Array<OneD, NekDouble>> Diff(3);
 
        for (int i = 0; i < m_dim; ++i)
        {
            Diff[i] = wsp + i * ntot;
        }
 
        // calculate local derivatives
        for (int i = 0; i < m_dim; ++i)
        {
            Blas::Dgemm('N', 'N', m_derivMat[i]->GetRows(), m_numElmt,
                        m_derivMat[i]->GetColumns(), 1.0,
                        m_derivMat[i]->GetRawPtr(), m_derivMat[i]->GetRows(),
                        input.data(), nPhys, 0.0, &Diff[i][0], nPhys);
        }
 
        // calculate full derivative
        Vmath::Zero(ntot, output, 1);
        if (m_isDeformed)
        {
            for (int j = 0; j < m_dim; ++j)
            {
                Vmath::Vvtvp(ntot, m_derivFac[dir * m_dim + j], 1, Diff[j], 1,
                             output, 1, output, 1);
            }
        }
        else
        {
            Array<OneD, NekDouble> t;
            for (int e = 0; e < m_numElmt; ++e)
            {
                for (int j = 0; j < m_dim; ++j)
                {
                    Vmath::Svtvp(m_nqe, m_derivFac[dir * m_dim + j][e],
                                 Diff[j] + e * m_nqe, 1, output + e * m_nqe, 1,
                                 t = output + e * m_nqe, 1);
                }
            }
        }
    }

References Blas::Dgemm(), m_derivFac, m_derivMat, m_dim, Nektar::Collections::Operator::m_isDeformed, Nektar::Collections::Operator::m_nqe, Nektar::Collections::Operator::m_numElmt, Nektar::Collections::Operator::m_stdExp, Vmath::Svtvp(), Vmath::Vvtvp(), and Vmath::Zero().

Member Data Documentation

m_coordim

int Nektar::Collections::PhysDeriv_StdMat::m_coordim

protected

Definition at line 200 of file PhysDeriv.cpp.

Referenced by operator()(), and PhysDeriv_StdMat().

m_derivFac

Array<TwoD, const NekDouble> Nektar::Collections::PhysDeriv_StdMat::m_derivFac

protected

Definition at line 198 of file PhysDeriv.cpp.

Referenced by operator()(), operator()(), and PhysDeriv_StdMat().

m_derivMat

Array<OneD, DNekMatSharedPtr> Nektar::Collections::PhysDeriv_StdMat::m_derivMat

protected

Definition at line 197 of file PhysDeriv.cpp.

Referenced by operator()(), operator()(), and PhysDeriv_StdMat().

m_dim

int Nektar::Collections::PhysDeriv_StdMat::m_dim

protected

Definition at line 199 of file PhysDeriv.cpp.

Referenced by operator()(), operator()(), and PhysDeriv_StdMat().