Nektar++
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Specialisation of the NodalUtil class to support nodal quad elements. More...
#include <NodalUtil.h>
Public Member Functions | |
NodalUtilQuad (int degree, Array< OneD, NekDouble > r, Array< OneD, NekDouble > s) | |
Construct the nodal utility class for a quadrilateral. More... | |
virtual | ~NodalUtilQuad () |
Public Member Functions inherited from Nektar::LibUtilities::NodalUtil | |
NekVector< NekDouble > | GetWeights () |
Obtain the integration weights for the given nodal distribution. More... | |
SharedMatrix | GetVandermonde () |
Return the Vandermonde matrix for the nodal distribution. More... | |
SharedMatrix | GetVandermondeForDeriv (int dir) |
Return the Vandermonde matrix of the derivative of the basis functions for the nodal distribution. More... | |
SharedMatrix | GetDerivMatrix (int dir) |
Return the derivative matrix for the nodal distribution. More... | |
SharedMatrix | GetInterpolationMatrix (Array< OneD, Array< OneD, NekDouble > > &xi) |
Construct the interpolation matrix used to evaluate the basis at the points xi inside the element. More... | |
Protected Member Functions | |
virtual NekVector< NekDouble > | v_OrthoBasis (const int mode) |
Return the value of the modal functions for the quad element at the nodal points m_xi for a given mode. More... | |
virtual NekVector< NekDouble > | v_OrthoBasisDeriv (const int dir, const int mode) |
Return the value of the derivative of the modal functions for the quadrilateral element at the nodal points m_xi for a given mode. More... | |
virtual boost::shared_ptr < NodalUtil > | v_CreateUtil (Array< OneD, Array< OneD, NekDouble > > &xi) |
Construct a NodalUtil object of the appropriate element type for a given set of points. More... | |
virtual NekDouble | v_ModeZeroIntegral () |
Return the value of the integral of the zero-th mode for this element. More... | |
virtual int | v_NumModes () |
Calculate the number of degrees of freedom for this element. More... | |
Protected Member Functions inherited from Nektar::LibUtilities::NodalUtil | |
NodalUtil (int degree, int dim) | |
Set up the NodalUtil object. More... | |
Protected Attributes | |
std::vector< std::pair< int, int > > | m_ordering |
Mapping from the indexing of the basis to a continuous ordering. More... | |
Protected Attributes inherited from Nektar::LibUtilities::NodalUtil | |
int | m_dim |
Dimension of the nodal element. More... | |
int | m_degree |
Degree of the nodal element. More... | |
int | m_numPoints |
Total number of nodal points. More... | |
Array< OneD, Array< OneD, NekDouble > > | m_xi |
Coordinates of the nodal points defining the basis. More... | |
Specialisation of the NodalUtil class to support nodal quad elements.
Definition at line 312 of file NodalUtil.h.
Nektar::LibUtilities::NodalUtilQuad::NodalUtilQuad | ( | int | degree, |
Array< OneD, NekDouble > | r, | ||
Array< OneD, NekDouble > | s | ||
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Construct the nodal utility class for a quadrilateral.
The constructor of this class sets up the m_ordering member variable used in the evaluation of the orthogonal basis.
degree | Polynomial order of this nodal quad. |
r | -coordinates of nodal points in the standard element. |
s | -coordinates of nodal points in the standard element. |
Definition at line 843 of file NodalUtil.cpp.
References Nektar::LibUtilities::NodalUtil::m_degree, Nektar::LibUtilities::NodalUtil::m_numPoints, m_ordering, and Nektar::LibUtilities::NodalUtil::m_xi.
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inlinevirtual |
Definition at line 319 of file NodalUtil.h.
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inlineprotectedvirtual |
Construct a NodalUtil object of the appropriate element type for a given set of points.
This function is used inside NodalUtil::GetInterpolationMatrix so that the (potentially non-square) Vandermonde matrix can be constructed to create the interpolation matrix at an arbitrary set of points in the domain.
xi | Distribution of nodal points to create utility with. |
Implements Nektar::LibUtilities::NodalUtil.
Definition at line 332 of file NodalUtil.h.
References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), and Nektar::LibUtilities::NodalUtil::m_degree.
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inlineprotectedvirtual |
Return the value of the integral of the zero-th mode for this element.
Note that for the orthogonal basis under consideration, all modes integrate to zero asides from the zero-th mode. This function is used in NodalUtil::GetWeights to determine integration weights.
Implements Nektar::LibUtilities::NodalUtil.
Definition at line 339 of file NodalUtil.h.
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inlineprotectedvirtual |
Calculate the number of degrees of freedom for this element.
Implements Nektar::LibUtilities::NodalUtil.
Definition at line 344 of file NodalUtil.h.
References Nektar::LibUtilities::NodalUtil::m_degree.
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protectedvirtual |
Return the value of the modal functions for the quad element at the nodal points m_xi for a given mode.
In a quad, we use the orthogonal basis
mode | The mode of the orthogonal basis to evaluate. |
Implements Nektar::LibUtilities::NodalUtil.
Definition at line 877 of file NodalUtil.cpp.
References Polylib::jacobfd(), Nektar::LibUtilities::NodalUtil::m_numPoints, m_ordering, Nektar::LibUtilities::NodalUtil::m_xi, and CG_Iterations::modes.
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protectedvirtual |
Return the value of the derivative of the modal functions for the quadrilateral element at the nodal points m_xi for a given mode.
mode | The mode of the orthogonal basis to evaluate. |
Implements Nektar::LibUtilities::NodalUtil.
Definition at line 904 of file NodalUtil.cpp.
References Polylib::jacobd(), Polylib::jacobfd(), Nektar::LibUtilities::NodalUtil::m_numPoints, m_ordering, Nektar::LibUtilities::NodalUtil::m_xi, and CG_Iterations::modes.
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protected |
Mapping from the indexing of the basis to a continuous ordering.
Definition at line 326 of file NodalUtil.h.
Referenced by NodalUtilQuad(), v_OrthoBasis(), and v_OrthoBasisDeriv().