Nektar::Collections::BwdTrans_SumFac_Tri Class Reference

Backward transform operator using sum-factorisation (Tri) More...

Inheritance diagram for Nektar::Collections::BwdTrans_SumFac_Tri:

Public Member Functions
virtual	~BwdTrans_SumFac_Tri ()
virtual void	operator() (const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &output1, Array< OneD, NekDouble > &output2, Array< OneD, NekDouble > &wsp)
	Perform operation. More...
virtual void	operator() (int dir, const Array< OneD, const NekDouble > &input, Array< OneD, NekDouble > &output, Array< OneD, NekDouble > &wsp)
Public Member Functions inherited from Nektar::Collections::Operator
	Operator (std::vector< StdRegions::StdExpansionSharedPtr > pCollExp, std::shared_ptr< CoalescedGeomData > GeomData)
	Constructor. More...
virtual COLLECTIONS_EXPORT	~Operator ()
int	GetWspSize ()
	Get the size of the required workspace. More...

Protected Attributes
const int	m_nquad0
const int	m_nquad1
const int	m_nmodes0
const int	m_nmodes1
Array< OneD, const NekDouble >	m_base0
Array< OneD, const NekDouble >	m_base1
bool	m_sortTopVertex
Protected Attributes inherited from Nektar::Collections::Operator
StdRegions::StdExpansionSharedPtr	m_stdExp
unsigned int	m_numElmt
unsigned int	m_wspSize

Private Member Functions
	BwdTrans_SumFac_Tri (vector< StdRegions::StdExpansionSharedPtr > pCollExp, CoalescedGeomDataSharedPtr pGeomData)

Detailed Description

Backward transform operator using sum-factorisation (Tri)

Definition at line 508 of file BwdTrans.cpp.

Constructor & Destructor Documentation

~BwdTrans_SumFac_Tri()

virtual Nektar::Collections::BwdTrans_SumFac_Tri::~BwdTrans_SumFac_Tri ( )

inlinevirtual

Definition at line 513 of file BwdTrans.cpp.

        {
        }

BwdTrans_SumFac_Tri()

Nektar::Collections::BwdTrans_SumFac_Tri::BwdTrans_SumFac_Tri ( vector< StdRegions::StdExpansionSharedPtr >  pCollExp, CoalescedGeomDataSharedPtr  pGeomData  )

inlineprivate

Definition at line 581 of file BwdTrans.cpp.

References Nektar::StdRegions::eBwdTrans, Nektar::LibUtilities::eModified_A, Nektar::Collections::eSumFac, Nektar::LibUtilities::eTriangle, and Nektar::Collections::GetOperatorFactory().

            : Operator  (pCollExp, pGeomData),
              m_nquad0  (m_stdExp->GetNumPoints(0)),
              m_nquad1  (m_stdExp->GetNumPoints(1)),
              m_nmodes0 (m_stdExp->GetBasisNumModes(0)),
              m_nmodes1 (m_stdExp->GetBasisNumModes(1)),
              m_base0   (m_stdExp->GetBasis(0)->GetBdata()),
              m_base1   (m_stdExp->GetBasis(1)->GetBdata())
        {
            m_wspSize = m_nquad0 * m_nmodes1 * m_numElmt;
            if(m_stdExp->GetBasis(0)->GetBasisType()
                    == LibUtilities::eModified_A)
            {
                m_sortTopVertex = true;
            }
            else
            {
                m_sortTopVertex = false;
            }
        }

Member Function Documentation

operator()() [1/2]

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

inlinevirtual

Perform operation.

Implements Nektar::Collections::Operator.

Definition at line 517 of file BwdTrans.cpp.

References ASSERTL1, Blas::Daxpy(), and Blas::Dgemm().

        {
            boost::ignore_unused(output1, output2);

            ASSERTL1(wsp.num_elements() == m_wspSize,
                     "Incorrect workspace size");

            int ncoeffs = m_stdExp->GetNcoeffs();
            int i       = 0;
            int mode    = 0;

            for (i = mode = 0; i < m_nmodes0; ++i)
            {
                Blas::Dgemm('N', 'N', m_nquad1, m_numElmt, m_nmodes1-i,
                            1.0, m_base1.get()+mode*m_nquad1, m_nquad1,
                            &input[0]+mode, ncoeffs, 0.0,
                            &wsp[i*m_nquad1*m_numElmt],       m_nquad1);
                mode += m_nmodes1-i;
            }

            // fix for modified basis by splitting top vertex mode
            if(m_sortTopVertex)
            {
                for(i = 0; i < m_numElmt; ++i)
                {
                    Blas::Daxpy(m_nquad1, input[1+i*ncoeffs],
                                m_base1.get() + m_nquad1, 1,
                                &wsp[m_nquad1*m_numElmt] + i*m_nquad1, 1);
                }

            }

            Blas::Dgemm('N', 'T', m_nquad0, m_nquad1*m_numElmt, m_nmodes0,
                        1.0, m_base0.get(), m_nquad0,
                        &wsp[0], m_nquad1*m_numElmt, 0.0,
                        &output[0], m_nquad0);
        }

operator()() [2/2]

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

inlinevirtual

Implements Nektar::Collections::Operator.

Definition at line 560 of file BwdTrans.cpp.

References ASSERTL0.

        {
            boost::ignore_unused(dir, input, output, wsp);
            ASSERTL0(false, "Not valid for this operator.");
        }

Member Data Documentation

m_base0

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Tri::m_base0

protected

Definition at line 576 of file BwdTrans.cpp.

m_base1

Array<OneD, const NekDouble> Nektar::Collections::BwdTrans_SumFac_Tri::m_base1

protected

Definition at line 577 of file BwdTrans.cpp.

m_nmodes0

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nmodes0

protected

Definition at line 574 of file BwdTrans.cpp.

m_nmodes1

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nmodes1

protected

Definition at line 575 of file BwdTrans.cpp.

m_nquad0

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nquad0

protected

Definition at line 572 of file BwdTrans.cpp.

m_nquad1

const int Nektar::Collections::BwdTrans_SumFac_Tri::m_nquad1

protected

Definition at line 573 of file BwdTrans.cpp.

m_sortTopVertex

bool Nektar::Collections::BwdTrans_SumFac_Tri::m_sortTopVertex

protected

Definition at line 578 of file BwdTrans.cpp.