Abstract class for integrators that support delta coefficients. More...

#include <lininteg.hpp>

Inheritance diagram for mfem::DeltaLFIntegrator:

Collaboration diagram for mfem::DeltaLFIntegrator:

Public Member Functions
bool	IsDelta () const
	Returns true if the derived class instance uses a delta coefficient.

void	GetDeltaCenter (Vector &center)
	Returns the center of the delta coefficient.

virtual void	AssembleDeltaElementVect (const FiniteElement &fe, ElementTransformation &Trans, Vector &elvect)=0
	Assemble the delta coefficient at the IntegrationPoint set in Trans which is assumed to map to the delta coefficient center.

Public Member Functions inherited from mfem::LinearFormIntegrator
virtual bool	SupportsDevice () const
	Method probing for assembly on device.

virtual void	AssembleDevice (const FiniteElementSpace &fes, const Array< int > &markers, Vector &b)
	Method defining assembly on device.

virtual void	AssembleRHSElementVect (const FiniteElement &el, ElementTransformation &Tr, Vector &elvect)=0

virtual void	AssembleRHSElementVect (const FiniteElement &el, FaceElementTransformations &Tr, Vector &elvect)

virtual void	AssembleRHSElementVect (const FiniteElement &el1, const FiniteElement &el2, FaceElementTransformations &Tr, Vector &elvect)

virtual	~LinearFormIntegrator ()

Public Member Functions inherited from mfem::Integrator
	Integrator (const IntegrationRule *ir=NULL)
	Create a new Integrator, optionally providing a prescribed quadrature rule to use in assembly.

virtual void	SetIntRule (const IntegrationRule *ir)
	Prescribe a fixed IntegrationRule to use, or set to null to let the integrator choose an appropriate rule.

void	SetIntegrationRule (const IntegrationRule &ir)
	Prescribe a fixed IntegrationRule to use. Sets the NURBS patch integration rule to null.

void	SetNURBSPatchIntRule (NURBSMeshRules *pr)
	Sets an integration rule for use on NURBS patches.

bool	HasNURBSPatchIntRule () const
	Check if a NURBS patch integration rule has been set.

const IntegrationRule *	GetIntRule () const
	Directly return the IntRule pointer (possibly null) without checking for NURBS patch rules or falling back on a default.

const IntegrationRule *	GetIntegrationRule () const
	Equivalent to GetIntRule, but retained for backward compatibility with applications.

Protected Member Functions
	DeltaLFIntegrator (Coefficient &q, const IntegrationRule *ir=NULL)
	This constructor should be used by derived classes that use a scalar DeltaCoefficient.

	DeltaLFIntegrator (VectorCoefficient &vq, const IntegrationRule *ir=NULL)
	This constructor should be used by derived classes that use a VectorDeltaCoefficient.

Protected Member Functions inherited from mfem::LinearFormIntegrator
	LinearFormIntegrator (const IntegrationRule *ir=NULL)

Protected Member Functions inherited from mfem::Integrator
const IntegrationRule *	GetIntegrationRule (const FiniteElement &trial_fe, const FiniteElement &test_fe, const ElementTransformation &trans) const
	Returns an integration rule based on the arguments and internal state of the Integrator object.

const IntegrationRule *	GetIntegrationRule (const FiniteElement &el, const ElementTransformation &trans) const
	Returns an integration rule based on the arguments and internal state. (Version for identical trial_fe and test_fe)

virtual const IntegrationRule *	GetDefaultIntegrationRule (const FiniteElement &trial_fe, const FiniteElement &test_fe, const ElementTransformation &trans) const
	Subclasses should override to choose a default integration rule.

Protected Attributes
DeltaCoefficient *	delta

VectorDeltaCoefficient *	vec_delta

Protected Attributes inherited from mfem::Integrator
const IntegrationRule *	IntRule

NURBSMeshRules *	patchRules = nullptr

Detailed Description

Abstract class for integrators that support delta coefficients.

Definition at line 59 of file lininteg.hpp.

Constructor & Destructor Documentation

◆ DeltaLFIntegrator() [1/2]

mfem::DeltaLFIntegrator::DeltaLFIntegrator	(	Coefficient &	q,
		const IntegrationRule *	ir = NULL )

inlineprotected

This constructor should be used by derived classes that use a scalar DeltaCoefficient.

Definition at line 67 of file lininteg.hpp.

◆ DeltaLFIntegrator() [2/2]

mfem::DeltaLFIntegrator::DeltaLFIntegrator	(	VectorCoefficient &	vq,
		const IntegrationRule *	ir = NULL )

inlineprotected

This constructor should be used by derived classes that use a VectorDeltaCoefficient.

Definition at line 74 of file lininteg.hpp.

Member Function Documentation

◆ AssembleDeltaElementVect()

virtual void mfem::DeltaLFIntegrator::AssembleDeltaElementVect	(	const FiniteElement &	fe,
		ElementTransformation &	Trans,
		Vector &	elvect )

pure virtual

Assemble the delta coefficient at the IntegrationPoint set in Trans which is assumed to map to the delta coefficient center.

Note: This method should be called for one mesh element only, including in parallel, even when the center of the delta coefficient is shared by multiple elements.

Implemented in mfem::DomainLFGradIntegrator, mfem::DomainLFIntegrator, mfem::VectorDomainLFGradIntegrator, mfem::VectorDomainLFIntegrator, mfem::VectorFEDomainLFCurlIntegrator, mfem::VectorFEDomainLFDivIntegrator, and mfem::VectorFEDomainLFIntegrator.

◆ GetDeltaCenter()

void mfem::DeltaLFIntegrator::GetDeltaCenter ( Vector & center )

inline

Returns the center of the delta coefficient.

Definition at line 85 of file lininteg.hpp.

◆ IsDelta()

bool mfem::DeltaLFIntegrator::IsDelta ( ) const

inline

Returns true if the derived class instance uses a delta coefficient.

Definition at line 82 of file lininteg.hpp.

Member Data Documentation

◆ delta

DeltaCoefficient* mfem::DeltaLFIntegrator::delta

protected

Definition at line 62 of file lininteg.hpp.

◆ vec_delta

VectorDeltaCoefficient* mfem::DeltaLFIntegrator::vec_delta