A class that performs interpolation from an E-vector to quadrature point values and/or derivatives (Q-vectors). More...

#include <quadinterpolator.hpp>

Collaboration diagram for mfem::QuadratureInterpolator:

Public Types
enum	EvalFlags { VALUES = 1 << 0 , DERIVATIVES = 1 << 1 , DETERMINANTS = 1 << 2 , PHYSICAL_DERIVATIVES = 1 << 3 }

Public Member Functions
	QuadratureInterpolator (const FiniteElementSpace &fes, const IntegrationRule &ir)

	QuadratureInterpolator (const FiniteElementSpace &fes, const QuadratureSpace &qs)

void	DisableTensorProducts (bool disable=true) const
	Disable the use of tensor product evaluations, for tensor-product elements, e.g. quads and hexes. By default, tensor product evaluations are enabled.

void	EnableTensorProducts () const
	Enable the use of tensor product evaluations, for tensor-product elements, e.g. quads and hexes. By default, this option is enabled.

bool	UsesTensorProducts () const
	Query the current tensor product evaluation mode.

QVectorLayout	GetOutputLayout () const
	Query the current output Q-vector layout. The default value is QVectorLayout::byNODES.

void	SetOutputLayout (QVectorLayout layout) const
	Set the desired output Q-vector layout. The default value is QVectorLayout::byNODES.

void	Mult (const Vector &e_vec, unsigned eval_flags, Vector &q_val, Vector &q_der, Vector &q_det) const
	Interpolate the E-vector e_vec to quadrature points.

void	Values (const Vector &e_vec, Vector &q_val) const
	Interpolate the values of the E-vector e_vec at quadrature points.

void	Derivatives (const Vector &e_vec, Vector &q_der) const
	Interpolate the derivatives (with respect to reference coordinates) of the E-vector e_vec at quadrature points.

void	PhysDerivatives (const Vector &e_vec, Vector &q_der) const
	Interpolate the derivatives in physical space of the E-vector e_vec at quadrature points.

void	Determinants (const Vector &e_vec, Vector &q_det) const
	Compute the determinants of the derivatives (with respect to reference coordinates) of the E-vector e_vec at quadrature points.

void	MultTranspose (unsigned eval_flags, const Vector &q_val, const Vector &q_der, Vector &e_vec) const
	Perform the transpose operation of Mult(). (TODO)

Static Public Attributes
static const int	MAX_NQ2D = 100

static const int	MAX_ND2D = 100

static const int	MAX_VDIM2D = 3

static const int	MAX_NQ3D = 1000

static const int	MAX_ND3D = 1000

static const int	MAX_VDIM3D = 3

Protected Attributes
const FiniteElementSpace *	fespace
	Not owned.

const QuadratureSpace *	qspace
	Not owned.

const IntegrationRule *	IntRule
	Not owned.

QVectorLayout	q_layout
	Output Q-vector layout.

bool	use_tensor_products
	Tensor product evaluation mode.

Vector	d_buffer
	Auxiliary device buffer.

Friends
class	FiniteElementSpace

Detailed Description

A class that performs interpolation from an E-vector to quadrature point values and/or derivatives (Q-vectors).

An E-vector represents the element-wise discontinuous version of the FE space and can be obtained, for example, from a GridFunction using the Operator returned by FiniteElementSpace::GetElementRestriction().

The target quadrature points in the elements can be described either by an IntegrationRule (all mesh elements must be of the same type in this case) or by a QuadratureSpace.

Definition at line 29 of file quadinterpolator.hpp.

Member Enumeration Documentation

◆ EvalFlags

enum mfem::QuadratureInterpolator::EvalFlags

Enumerator
VALUES	Evaluate the values at quadrature points.
DERIVATIVES	Evaluate the derivatives at quadrature points.
DETERMINANTS	Assuming the derivative at quadrature points form a matrix, this flag can be used to compute and store their determinants. This flag can only be used in Mult().
PHYSICAL_DERIVATIVES	Evaluate the physical derivatives.

Definition at line 51 of file quadinterpolator.hpp.

Constructor & Destructor Documentation

◆ QuadratureInterpolator() [1/2]

mfem::QuadratureInterpolator::QuadratureInterpolator	(	const FiniteElementSpace &	fes,
		const IntegrationRule &	ir )

Definition at line 22 of file quadinterpolator.cpp.

◆ QuadratureInterpolator() [2/2]

mfem::QuadratureInterpolator::QuadratureInterpolator	(	const FiniteElementSpace &	fes,
		const QuadratureSpace &	qs )

Definition at line 38 of file quadinterpolator.cpp.

Member Function Documentation

◆ Derivatives()

void mfem::QuadratureInterpolator::Derivatives	(	const Vector &	e_vec,
		Vector &	q_der ) const

Interpolate the derivatives (with respect to reference coordinates) of the E-vector e_vec at quadrature points.

Definition at line 713 of file quadinterpolator.cpp.

◆ Determinants()

void mfem::QuadratureInterpolator::Determinants	(	const Vector &	e_vec,
		Vector &	q_det ) const

Compute the determinants of the derivatives (with respect to reference coordinates) of the E-vector e_vec at quadrature points.

Definition at line 727 of file quadinterpolator.cpp.

◆ DisableTensorProducts()

void mfem::QuadratureInterpolator::DisableTensorProducts ( bool disable = true ) const

inline

Disable the use of tensor product evaluations, for tensor-product elements, e.g. quads and hexes. By default, tensor product evaluations are enabled.

See also: EnableTensorProducts(), UsesTensorProducts().

Definition at line 72 of file quadinterpolator.hpp.

◆ EnableTensorProducts()

void mfem::QuadratureInterpolator::EnableTensorProducts ( ) const

inline

Enable the use of tensor product evaluations, for tensor-product elements, e.g. quads and hexes. By default, this option is enabled.

See also: DisableTensorProducts(), UsesTensorProducts().

Definition at line 78 of file quadinterpolator.hpp.

◆ GetOutputLayout()

QVectorLayout mfem::QuadratureInterpolator::GetOutputLayout ( ) const

inline

Query the current output Q-vector layout. The default value is QVectorLayout::byNODES.

See also: SetOutputLayout().

Definition at line 87 of file quadinterpolator.hpp.

◆ Mult()

void mfem::QuadratureInterpolator::Mult	(	const Vector &	e_vec,
		unsigned	eval_flags,
		Vector &	q_val,
		Vector &	q_der,
		Vector &	q_det ) const

Interpolate the E-vector e_vec to quadrature points.

The eval_flags are a bitwise mask of constants from the EvalFlags enumeration. When the VALUES flag is set, the values at quadrature points are computed and stored in the Vector q_val. Similarly, when one of the flags DERIVATIVES or PHYSICAL_DERIVATIVES is set, the derivatives (with respect to reference or physical coordinates, respectively) are computed and stored in q_der. Only one of the flags DERIVATIVES or PHYSICAL_DERIVATIVES can be set in a call. When the DETERMINANTS flag is set, it is assumed that the derivatives (with respect to reference coordinates) form a matrix at each quadrature point (i.e. the associated FiniteElementSpace is a vector space) and their determinants are computed and stored in q_det.

The layout of the input E-vector, e_vec, must be consistent with the evaluation mode: if tensor-product evaluations are enabled, then tensor-product elements, must use the ElementDofOrdering::LEXICOGRAPHIC layout; otherwise – ElementDofOrdering::NATIVE layout. See FiniteElementSpace::GetElementRestriction().

Definition at line 459 of file quadinterpolator.cpp.

◆ MultTranspose()

void mfem::QuadratureInterpolator::MultTranspose	(	unsigned	eval_flags,
		const Vector &	q_val,
		const Vector &	q_der,
		Vector &	e_vec ) const

Perform the transpose operation of Mult(). (TODO)

Definition at line 694 of file quadinterpolator.cpp.

◆ PhysDerivatives()

void mfem::QuadratureInterpolator::PhysDerivatives	(	const Vector &	e_vec,
		Vector &	q_der ) const

Interpolate the derivatives in physical space of the E-vector e_vec at quadrature points.

Definition at line 720 of file quadinterpolator.cpp.

◆ SetOutputLayout()

void mfem::QuadratureInterpolator::SetOutputLayout ( QVectorLayout layout ) const

inline

Set the desired output Q-vector layout. The default value is QVectorLayout::byNODES.

See also: GetOutputLayout().

Definition at line 92 of file quadinterpolator.hpp.

◆ UsesTensorProducts()

bool mfem::QuadratureInterpolator::UsesTensorProducts ( ) const

inline

Query the current tensor product evaluation mode.

See also: DisableTensorProducts(), EnableTensorProducts().

Definition at line 82 of file quadinterpolator.hpp.

◆ Values()

void mfem::QuadratureInterpolator::Values	(	const Vector &	e_vec,
		Vector &	q_val ) const

Interpolate the values of the E-vector e_vec at quadrature points.

Definition at line 706 of file quadinterpolator.cpp.

Friends And Related Symbol Documentation

◆ FiniteElementSpace

friend class FiniteElementSpace

friend

Definition at line 32 of file quadinterpolator.hpp.

Member Data Documentation

◆ d_buffer

Vector mfem::QuadratureInterpolator::d_buffer

mutableprotected

Auxiliary device buffer.

Definition at line 40 of file quadinterpolator.hpp.

◆ fespace

const FiniteElementSpace* mfem::QuadratureInterpolator::fespace

protected

Not owned.

Definition at line 34 of file quadinterpolator.hpp.

◆ IntRule

const IntegrationRule* mfem::QuadratureInterpolator::IntRule

protected

Not owned.

Definition at line 36 of file quadinterpolator.hpp.

◆ MAX_ND2D

const int mfem::QuadratureInterpolator::MAX_ND2D = 100

static

Definition at line 44 of file quadinterpolator.hpp.

◆ MAX_ND3D

const int mfem::QuadratureInterpolator::MAX_ND3D = 1000

static

Definition at line 48 of file quadinterpolator.hpp.

◆ MAX_NQ2D

const int mfem::QuadratureInterpolator::MAX_NQ2D = 100

static

Definition at line 43 of file quadinterpolator.hpp.

◆ MAX_NQ3D

const int mfem::QuadratureInterpolator::MAX_NQ3D = 1000

static

Definition at line 47 of file quadinterpolator.hpp.

◆ MAX_VDIM2D

const int mfem::QuadratureInterpolator::MAX_VDIM2D = 3

static

Definition at line 45 of file quadinterpolator.hpp.

◆ MAX_VDIM3D

const int mfem::QuadratureInterpolator::MAX_VDIM3D = 3

static

Definition at line 49 of file quadinterpolator.hpp.

◆ q_layout

QVectorLayout mfem::QuadratureInterpolator::q_layout

mutableprotected

Output Q-vector layout.

Definition at line 37 of file quadinterpolator.hpp.

◆ qspace

const QuadratureSpace* mfem::QuadratureInterpolator::qspace

protected

Not owned.

Definition at line 35 of file quadinterpolator.hpp.

◆ use_tensor_products

bool mfem::QuadratureInterpolator::use_tensor_products

mutableprotected

Tensor product evaluation mode.

Definition at line 39 of file quadinterpolator.hpp.

The documentation for this class was generated from the following files:

fem/quadinterpolator.hpp
fem/quadinterpolator.cpp

Public Types

Public Member Functions

Static Public Attributes

Protected Attributes

Friends

Detailed Description

Member Enumeration Documentation

◆ EvalFlags

Constructor & Destructor Documentation

◆ QuadratureInterpolator() [1/2]

◆ QuadratureInterpolator() [2/2]

Member Function Documentation

◆ Derivatives()

◆ Determinants()

◆ DisableTensorProducts()

◆ EnableTensorProducts()

◆ GetOutputLayout()

◆ Mult()

◆ MultTranspose()

◆ PhysDerivatives()

◆ SetOutputLayout()

◆ UsesTensorProducts()

◆ Values()

Friends And Related Symbol Documentation

◆ FiniteElementSpace

Member Data Documentation

◆ d_buffer

◆ fespace

◆ IntRule

◆ MAX_ND2D

◆ MAX_ND3D

◆ MAX_NQ2D

◆ MAX_NQ3D

◆ MAX_VDIM2D

◆ MAX_VDIM3D

◆ q_layout

◆ qspace

◆ use_tensor_products