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. More...
void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp) final
void	CheckFactors (StdRegions::FactorMap factors, int coll_phys_offset) override
	Check the validity of the supplied factor map. More...
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData, StdRegions::FactorMap factors)
	Constructor. More...
virtual	~Operator ()=default
virtual COLLECTIONS_EXPORT void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output0, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp=NullNekDouble1DArray)=0
	Perform operation. More...
virtual COLLECTIONS_EXPORT void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp=NullNekDouble1DArray)=0
virtual COLLECTIONS_EXPORT void	CheckFactors (StdRegions::FactorMap factors, int coll_phys_offset)=0
	Check the validity of the supplied factor map. More...
unsigned int	GetWspSize ()
	Get the size of the required workspace. More...
unsigned int	GetNumElmt ()
	Get number of elements. More...
StdRegions::StdExpansionSharedPtr	GetExpSharedPtr ()
	Get expansion pointer. More...
unsigned int	GetInputSize ()
unsigned int	GetOutputSize ()

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 More...
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 More...
unsigned int	m_outputSize
	number of modes or quadrature points that are taken as output from an operator More...

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

Additional Inherited Members
Protected Member Functions inherited from Nektar::Collections::Operator
virtual int	v_GetInputSize ()
	This purely virtual function needs to be set-up for every operator inside Collections. It is responsible for returning the size of input collection, that the operator is applied on either in physical or coefficient space. More...
virtual int	v_GetOutputSize ()
	This purely virtual function needs to be set-up for every operator inside Collections. It is responsible for returning the output size either in physical or coefficient space of an operator inside Collections. More...
Protected Member Functions inherited from Nektar::Collections::PhysDeriv_Helper
	PhysDeriv_Helper ()

Detailed Description

Phys deriv operator using standard matrix approach.

Definition at line 76 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< StdRegions::StdExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData, StdRegions::FactorMap  factors  )

inlineprivate

Definition at line 206 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

CheckFactors()

void Nektar::Collections::PhysDeriv_StdMat::CheckFactors ( StdRegions::FactorMap  factors, int  coll_phys_offset  )

inlineoverridevirtual

Check the validity of the supplied factor map.

Implements Nektar::Collections::Operator.

Definition at line 193 of file PhysDeriv.cpp.

    {
        ASSERTL0(false, "Not valid for this operator.");
    }

References ASSERTL0.

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 84 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.get(), 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 145 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.get(), 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 203 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 201 of file PhysDeriv.cpp.

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

m_derivMat

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

protected

Definition at line 200 of file PhysDeriv.cpp.

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

m_dim

int Nektar::Collections::PhysDeriv_StdMat::m_dim

protected

Definition at line 202 of file PhysDeriv.cpp.

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