MFEM v4.7.0
Finite element discretization library
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Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
mfem::LinearForm Class Reference

Vector with associated FE space and LinearFormIntegrators. More...

#include <linearform.hpp>

Inheritance diagram for mfem::LinearForm:
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Collaboration diagram for mfem::LinearForm:
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Public Member Functions

 LinearForm (FiniteElementSpace *f)
 Creates linear form associated with FE space *f.
 
 LinearForm (FiniteElementSpace *f, LinearForm *lf)
 Create a LinearForm on the FiniteElementSpace f, using the same integrators as the LinearForm lf.
 
 LinearForm ()
 Create an empty LinearForm without an associated FiniteElementSpace.
 
 LinearForm (FiniteElementSpace *f, real_t *data)
 Construct a LinearForm using previously allocated array data.
 
LinearFormoperator= (const LinearForm &rhs)
 Copy assignment. Only the data of the base class Vector is copied.
 
MFEM_DEPRECATED FiniteElementSpaceGetFES ()
 (DEPRECATED) Return the FE space associated with the LinearForm.
 
FiniteElementSpaceFESpace ()
 Read+write access to the associated FiniteElementSpace.
 
const FiniteElementSpaceFESpace () const
 Read-only access to the associated FiniteElementSpace.
 
void AddDomainIntegrator (LinearFormIntegrator *lfi)
 Adds new Domain Integrator. Assumes ownership of lfi.
 
void AddDomainIntegrator (LinearFormIntegrator *lfi, Array< int > &elem_marker)
 
void AddBoundaryIntegrator (LinearFormIntegrator *lfi)
 Adds new Boundary Integrator. Assumes ownership of lfi.
 
void AddBoundaryIntegrator (LinearFormIntegrator *lfi, Array< int > &bdr_attr_marker)
 Add new Boundary Integrator, restricted to the given boundary attributes.
 
void AddBdrFaceIntegrator (LinearFormIntegrator *lfi)
 Adds new Boundary Face Integrator. Assumes ownership of lfi.
 
void AddBdrFaceIntegrator (LinearFormIntegrator *lfi, Array< int > &bdr_attr_marker)
 Add new Boundary Face Integrator, restricted to the given boundary attributes.
 
void AddInteriorFaceIntegrator (LinearFormIntegrator *lfi)
 Adds new Interior Face Integrator. Assumes ownership of lfi.
 
Array< LinearFormIntegrator * > * GetDLFI ()
 Access all integrators added with AddDomainIntegrator() which are not DeltaLFIntegrators or they are DeltaLFIntegrators with non-delta coefficients.
 
Array< Array< int > * > * GetDLFI_Marker ()
 Access all domain markers added with AddDomainIntegrator(). If no marker was specified when the integrator was added, the corresponding pointer (to Array<int>) will be NULL.
 
Array< DeltaLFIntegrator * > * GetDLFI_Delta ()
 Access all integrators added with AddDomainIntegrator() which are DeltaLFIntegrators with delta coefficients.
 
Array< LinearFormIntegrator * > * GetBLFI ()
 Access all integrators added with AddBoundaryIntegrator().
 
Array< LinearFormIntegrator * > * GetFLFI ()
 Access all integrators added with AddBdrFaceIntegrator().
 
Array< LinearFormIntegrator * > * GetIFLFI ()
 Access all integrators added with AddInteriorFaceIntegrator().
 
Array< Array< int > * > * GetFLFI_Marker ()
 Access all boundary markers added with AddBdrFaceIntegrator(). If no marker was specified when the integrator was added, the corresponding pointer (to Array<int>) will be NULL.
 
void UseFastAssembly (bool use_fa)
 Which assembly algorithm to use: the new device-compatible fast assembly (true), or the legacy CPU-only algorithm (false).
 
void Assemble ()
 Assembles the linear form i.e. sums over all domain/bdr integrators.
 
virtual bool SupportsDevice () const
 Return true if assembly on device is supported, false otherwise.
 
void AssembleDelta ()
 Assembles delta functions of the linear form.
 
void Update ()
 Update the object according to the associated FE space fes.
 
void Update (FiniteElementSpace *f)
 Associate a new FE space, *f, with this object and Update() it. *‍/.
 
void Update (FiniteElementSpace *f, Vector &v, int v_offset)
 Associate a new FE space, *f, with this object and use the data of v, offset by v_offset, to initialize this object's Vector::data.
 
virtual void MakeRef (FiniteElementSpace *f, Vector &v, int v_offset)
 Make the LinearForm reference external data on a new FiniteElementSpace.
 
real_t operator() (const GridFunction &gf) const
 Return the action of the LinearForm as a linear mapping.
 
LinearFormoperator= (real_t value)
 Redefine '=' for LinearForm = constant.
 
LinearFormoperator= (const Vector &v)
 Copy the data from v.
 
 ~LinearForm ()
 Destroys linear form.
 
- Public Member Functions inherited from mfem::Vector
 Vector ()
 
 Vector (const Vector &)
 Copy constructor. Allocates a new data array and copies the data.
 
 Vector (Vector &&v)
 Move constructor. "Steals" data from its argument.
 
 Vector (int s)
 Creates vector of size s.
 
 Vector (real_t *data_, int size_)
 Creates a vector referencing an array of doubles, owned by someone else.
 
 Vector (Vector &base, int base_offset, int size_)
 Create a Vector referencing a sub-vector of the Vector base starting at the given offset, base_offset, and size size_.
 
 Vector (int size_, MemoryType mt)
 Create a Vector of size size_ using MemoryType mt.
 
 Vector (int size_, MemoryType h_mt, MemoryType d_mt)
 Create a Vector of size size_ using host MemoryType h_mt and device MemoryType d_mt.
 
template<int N, typename T = real_t>
 Vector (const T(&values)[N])
 Create a vector using a braced initializer list.
 
virtual void UseDevice (bool use_dev) const
 Enable execution of Vector operations using the mfem::Device.
 
virtual bool UseDevice () const
 Return the device flag of the Memory object used by the Vector.
 
void Load (std::istream **in, int np, int *dim)
 Reads a vector from multiple files.
 
void Load (std::istream &in, int Size)
 Load a vector from an input stream.
 
void Load (std::istream &in)
 Load a vector from an input stream, reading the size from the stream.
 
void SetSize (int s)
 Resize the vector to size s.
 
void SetSize (int s, MemoryType mt)
 Resize the vector to size s using MemoryType mt.
 
void SetSize (int s, const Vector &v)
 Resize the vector to size s using the MemoryType of v.
 
void SetData (real_t *d)
 
void SetDataAndSize (real_t *d, int s)
 Set the Vector data and size.
 
void NewDataAndSize (real_t *d, int s)
 Set the Vector data and size, deleting the old data, if owned.
 
void NewMemoryAndSize (const Memory< real_t > &mem, int s, bool own_mem)
 Reset the Vector to use the given external Memory mem and size s.
 
void MakeRef (Vector &base, int offset, int size)
 Reset the Vector to be a reference to a sub-vector of base.
 
void MakeRef (Vector &base, int offset)
 Reset the Vector to be a reference to a sub-vector of base without changing its current size.
 
void MakeDataOwner () const
 Set the Vector data (host pointer) ownership flag.
 
void Destroy ()
 Destroy a vector.
 
void DeleteDevice (bool copy_to_host=true)
 Delete the device pointer, if owned. If copy_to_host is true and the data is valid only on device, move it to host before deleting. Invalidates the device memory.
 
int Size () const
 Returns the size of the vector.
 
int Capacity () const
 Return the size of the currently allocated data array.
 
real_tGetData () const
 Return a pointer to the beginning of the Vector data.
 
MFEM_DEPRECATED operator real_t * ()
 Conversion to double *. Deprecated.
 
MFEM_DEPRECATED operator const real_t * () const
 Conversion to const double *. Deprecated.
 
real_tbegin ()
 STL-like begin.
 
real_tend ()
 STL-like end.
 
const real_tbegin () const
 STL-like begin (const version).
 
const real_tend () const
 STL-like end (const version).
 
Memory< real_t > & GetMemory ()
 Return a reference to the Memory object used by the Vector.
 
const Memory< real_t > & GetMemory () const
 Return a reference to the Memory object used by the Vector, const version.
 
void SyncMemory (const Vector &v) const
 Update the memory location of the vector to match v.
 
void SyncAliasMemory (const Vector &v) const
 Update the alias memory location of the vector to match v.
 
bool OwnsData () const
 Read the Vector data (host pointer) ownership flag.
 
void StealData (real_t **p)
 Changes the ownership of the data; after the call the Vector is empty.
 
real_tStealData ()
 Changes the ownership of the data; after the call the Vector is empty.
 
real_tElem (int i)
 Access Vector entries. Index i = 0 .. size-1.
 
const real_tElem (int i) const
 Read only access to Vector entries. Index i = 0 .. size-1.
 
real_toperator() (int i)
 Access Vector entries using () for 0-based indexing.
 
const real_toperator() (int i) const
 Read only access to Vector entries using () for 0-based indexing.
 
real_toperator[] (int i)
 Access Vector entries using [] for 0-based indexing.
 
const real_toperator[] (int i) const
 Read only access to Vector entries using [] for 0-based indexing.
 
real_t operator* (const real_t *) const
 Dot product with a double * array.
 
real_t operator* (const Vector &v) const
 Return the inner-product.
 
Vectoroperator= (const real_t *v)
 Copy Size() entries from v.
 
Vectoroperator= (const Vector &v)
 Copy assignment.
 
Vectoroperator= (Vector &&v)
 Move assignment.
 
Vectoroperator= (real_t value)
 Redefine '=' for vector = constant.
 
Vectoroperator*= (real_t c)
 
Vectoroperator*= (const Vector &v)
 Component-wise scaling: (*this)(i) *= v(i)
 
Vectoroperator/= (real_t c)
 
Vectoroperator/= (const Vector &v)
 Component-wise division: (*this)(i) /= v(i)
 
Vectoroperator-= (real_t c)
 
Vectoroperator-= (const Vector &v)
 
Vectoroperator+= (real_t c)
 
Vectoroperator+= (const Vector &v)
 
VectorAdd (const real_t a, const Vector &Va)
 (*this) += a * Va
 
VectorSet (const real_t a, const Vector &x)
 (*this) = a * x
 
void SetVector (const Vector &v, int offset)
 
void AddSubVector (const Vector &v, int offset)
 
void Neg ()
 (*this) = -(*this)
 
void Reciprocal ()
 (*this)(i) = 1.0 / (*this)(i)
 
void Swap (Vector &other)
 Swap the contents of two Vectors.
 
void cross3D (const Vector &vin, Vector &vout) const
 
void median (const Vector &lo, const Vector &hi)
 v = median(v,lo,hi) entrywise. Implementation assumes lo <= hi.
 
void GetSubVector (const Array< int > &dofs, Vector &elemvect) const
 Extract entries listed in dofs to the output Vector elemvect.
 
void GetSubVector (const Array< int > &dofs, real_t *elem_data) const
 Extract entries listed in dofs to the output array elem_data.
 
void SetSubVector (const Array< int > &dofs, const real_t value)
 Set the entries listed in dofs to the given value.
 
void SetSubVector (const Array< int > &dofs, const Vector &elemvect)
 Set the entries listed in dofs to the values given in the elemvect Vector. Negative dof values cause the -dof-1 position in this Vector to receive the -val from elemvect.
 
void SetSubVector (const Array< int > &dofs, real_t *elem_data)
 Set the entries listed in dofs to the values given the , elem_data array. Negative dof values cause the -dof-1 position in this Vector to receive the -val from elem_data.
 
void AddElementVector (const Array< int > &dofs, const Vector &elemvect)
 Add elements of the elemvect Vector to the entries listed in dofs. Negative dof values cause the -dof-1 position in this Vector to add the -val from elemvect.
 
void AddElementVector (const Array< int > &dofs, real_t *elem_data)
 Add elements of the elem_data array to the entries listed in dofs. Negative dof values cause the -dof-1 position in this Vector to add the -val from elem_data.
 
void AddElementVector (const Array< int > &dofs, const real_t a, const Vector &elemvect)
 Add times the elements of the elemvect Vector to the entries listed in dofs. Negative dof values cause the -dof-1 position in this Vector to add the -a*val from elemvect.
 
void SetSubVectorComplement (const Array< int > &dofs, const real_t val)
 Set all vector entries NOT in the dofs Array to the given val.
 
void Print (std::ostream &out=mfem::out, int width=8) const
 Prints vector to stream out.
 
void Print (adios2stream &out, const std::string &variable_name) const
 
void Print_HYPRE (std::ostream &out) const
 Prints vector to stream out in HYPRE_Vector format.
 
void PrintHash (std::ostream &out) const
 Print the Vector size and hash of its data.
 
void Randomize (int seed=0)
 Set random values in the vector.
 
real_t Norml2 () const
 Returns the l2 norm of the vector.
 
real_t Normlinf () const
 Returns the l_infinity norm of the vector.
 
real_t Norml1 () const
 Returns the l_1 norm of the vector.
 
real_t Normlp (real_t p) const
 Returns the l_p norm of the vector.
 
real_t Max () const
 Returns the maximal element of the vector.
 
real_t Min () const
 Returns the minimal element of the vector.
 
real_t Sum () const
 Return the sum of the vector entries.
 
real_t DistanceSquaredTo (const real_t *p) const
 Compute the square of the Euclidean distance to another vector.
 
real_t DistanceSquaredTo (const Vector &p) const
 Compute the square of the Euclidean distance to another vector.
 
real_t DistanceTo (const real_t *p) const
 Compute the Euclidean distance to another vector.
 
real_t DistanceTo (const Vector &p) const
 Compute the Euclidean distance to another vector.
 
int CheckFinite () const
 Count the number of entries in the Vector for which isfinite is false, i.e. the entry is a NaN or +/-Inf.
 
virtual ~Vector ()
 Destroys vector.
 
virtual const real_tRead (bool on_dev=true) const
 Shortcut for mfem::Read(vec.GetMemory(), vec.Size(), on_dev).
 
virtual const real_tHostRead () const
 Shortcut for mfem::Read(vec.GetMemory(), vec.Size(), false).
 
virtual real_tWrite (bool on_dev=true)
 Shortcut for mfem::Write(vec.GetMemory(), vec.Size(), on_dev).
 
virtual real_tHostWrite ()
 Shortcut for mfem::Write(vec.GetMemory(), vec.Size(), false).
 
virtual real_tReadWrite (bool on_dev=true)
 Shortcut for mfem::ReadWrite(vec.GetMemory(), vec.Size(), on_dev).
 
virtual real_tHostReadWrite ()
 Shortcut for mfem::ReadWrite(vec.GetMemory(), vec.Size(), false).
 

Protected Member Functions

bool HaveDeltaLocations ()
 If true, the delta locations are not (re)computed during assembly.
 
void ResetDeltaLocations ()
 Force (re)computation of delta locations.
 

Protected Attributes

FiniteElementSpacefes
 FE space on which the LinearForm lives. Not owned.
 
LinearFormExtensionext = nullptr
 Extension for supporting different assembly levels.
 
bool fast_assembly = false
 Should we use the device-compatible fast assembly algorithm (false by default)
 
int extern_lfs = 0
 Indicates the LinearFormIntegrators stored in domain_integs, domain_delta_integs, boundary_integs, and boundary_face_integs are owned by another LinearForm.
 
Array< LinearFormIntegrator * > domain_integs
 Set of Domain Integrators to be applied.
 
Array< Array< int > * > domain_integs_marker
 
Array< DeltaLFIntegrator * > domain_delta_integs
 Separate array for integrators with delta function coefficients.
 
Array< LinearFormIntegrator * > boundary_integs
 Set of Boundary Integrators to be applied.
 
Array< Array< int > * > boundary_integs_marker
 Entries are not owned.
 
Array< LinearFormIntegrator * > boundary_face_integs
 Set of Boundary Face Integrators to be applied.
 
Array< Array< int > * > boundary_face_integs_marker
 Entries not owned.
 
Array< LinearFormIntegrator * > interior_face_integs
 Set of Internal Face Integrators to be applied.
 
Array< int > domain_delta_integs_elem_id
 The element ids where the centers of the delta functions lie.
 
Array< IntegrationPointdomain_delta_integs_ip
 The reference coordinates where the centers of the delta functions lie.
 
- Protected Attributes inherited from mfem::Vector
Memory< real_tdata
 
int size
 

Detailed Description

Vector with associated FE space and LinearFormIntegrators.

Definition at line 24 of file linearform.hpp.

Constructor & Destructor Documentation

◆ LinearForm() [1/4]

mfem::LinearForm::LinearForm ( FiniteElementSpace f)
inline

Creates linear form associated with FE space *f.

The pointer f is not owned by the newly constructed object.

Definition at line 88 of file linearform.hpp.

◆ LinearForm() [2/4]

mfem::LinearForm::LinearForm ( FiniteElementSpace f,
LinearForm lf 
)

Create a LinearForm on the FiniteElementSpace f, using the same integrators as the LinearForm lf.

The pointer f is not owned by the newly constructed object.

The integrators in lf are copied as pointers and they are not owned by the newly constructed LinearForm.

Definition at line 19 of file linearform.cpp.

◆ LinearForm() [3/4]

mfem::LinearForm::LinearForm ( )
inline

Create an empty LinearForm without an associated FiniteElementSpace.

The associated FiniteElementSpace can be set later using one of the methods: Update(FiniteElementSpace *) or Update(FiniteElementSpace *, Vector &, int).

Definition at line 104 of file linearform.hpp.

◆ LinearForm() [4/4]

mfem::LinearForm::LinearForm ( FiniteElementSpace f,
real_t data 
)
inline

Construct a LinearForm using previously allocated array data.

The LinearForm does not assume ownership of data which is assumed to be of size at least f->GetVSize(). Similar to the Vector constructor for externally allocated array, the pointer data can be NULL. The data array can be replaced later using the method SetData().

Definition at line 112 of file linearform.hpp.

◆ ~LinearForm()

mfem::LinearForm::~LinearForm ( )

Destroys linear form.

Definition at line 423 of file linearform.cpp.

Member Function Documentation

◆ AddBdrFaceIntegrator() [1/2]

void mfem::LinearForm::AddBdrFaceIntegrator ( LinearFormIntegrator lfi)

Adds new Boundary Face Integrator. Assumes ownership of lfi.

Definition at line 89 of file linearform.cpp.

◆ AddBdrFaceIntegrator() [2/2]

void mfem::LinearForm::AddBdrFaceIntegrator ( LinearFormIntegrator lfi,
Array< int > &  bdr_attr_marker 
)

Add new Boundary Face Integrator, restricted to the given boundary attributes.

Assumes ownership of lfi. The array bdr_attr_marker is stored internally as a pointer to the given Array<int> object.

Definition at line 96 of file linearform.cpp.

◆ AddBoundaryIntegrator() [1/2]

void mfem::LinearForm::AddBoundaryIntegrator ( LinearFormIntegrator lfi)

Adds new Boundary Integrator. Assumes ownership of lfi.

Definition at line 76 of file linearform.cpp.

◆ AddBoundaryIntegrator() [2/2]

void mfem::LinearForm::AddBoundaryIntegrator ( LinearFormIntegrator lfi,
Array< int > &  bdr_attr_marker 
)

Add new Boundary Integrator, restricted to the given boundary attributes.

Assumes ownership of lfi. The array bdr_attr_marker is stored internally as a pointer to the given Array<int> object.

Definition at line 82 of file linearform.cpp.

◆ AddDomainIntegrator() [1/2]

void mfem::LinearForm::AddDomainIntegrator ( LinearFormIntegrator lfi)

Adds new Domain Integrator. Assumes ownership of lfi.

Definition at line 45 of file linearform.cpp.

◆ AddDomainIntegrator() [2/2]

void mfem::LinearForm::AddDomainIntegrator ( LinearFormIntegrator lfi,
Array< int > &  elem_marker 
)

Adds new Domain Integrator restricted to certain elements specified by the elem_attr_marker.

Definition at line 60 of file linearform.cpp.

◆ AddInteriorFaceIntegrator()

void mfem::LinearForm::AddInteriorFaceIntegrator ( LinearFormIntegrator lfi)

Adds new Interior Face Integrator. Assumes ownership of lfi.

Definition at line 103 of file linearform.cpp.

◆ Assemble()

void mfem::LinearForm::Assemble ( )

Assembles the linear form i.e. sums over all domain/bdr integrators.

When UseFastAssembly(true) has been called and the linearform assembly is compatible with device execution, it will be executed on the device.

Definition at line 172 of file linearform.cpp.

◆ AssembleDelta()

void mfem::LinearForm::AssembleDelta ( )

Assembles delta functions of the linear form.

Definition at line 369 of file linearform.cpp.

◆ FESpace() [1/2]

FiniteElementSpace * mfem::LinearForm::FESpace ( )
inline

Read+write access to the associated FiniteElementSpace.

Definition at line 129 of file linearform.hpp.

◆ FESpace() [2/2]

const FiniteElementSpace * mfem::LinearForm::FESpace ( ) const
inline

Read-only access to the associated FiniteElementSpace.

Definition at line 131 of file linearform.hpp.

◆ GetBLFI()

Array< LinearFormIntegrator * > * mfem::LinearForm::GetBLFI ( )
inline

Access all integrators added with AddBoundaryIntegrator().

Definition at line 180 of file linearform.hpp.

◆ GetDLFI()

Array< LinearFormIntegrator * > * mfem::LinearForm::GetDLFI ( )
inline

Access all integrators added with AddDomainIntegrator() which are not DeltaLFIntegrators or they are DeltaLFIntegrators with non-delta coefficients.

Definition at line 168 of file linearform.hpp.

◆ GetDLFI_Delta()

Array< DeltaLFIntegrator * > * mfem::LinearForm::GetDLFI_Delta ( )
inline

Access all integrators added with AddDomainIntegrator() which are DeltaLFIntegrators with delta coefficients.

Definition at line 177 of file linearform.hpp.

◆ GetDLFI_Marker()

Array< Array< int > * > * mfem::LinearForm::GetDLFI_Marker ( )
inline

Access all domain markers added with AddDomainIntegrator(). If no marker was specified when the integrator was added, the corresponding pointer (to Array<int>) will be NULL.

Definition at line 173 of file linearform.hpp.

◆ GetFES()

MFEM_DEPRECATED FiniteElementSpace * mfem::LinearForm::GetFES ( )
inline

(DEPRECATED) Return the FE space associated with the LinearForm.

Deprecated:
Use FESpace() instead.

Definition at line 126 of file linearform.hpp.

◆ GetFLFI()

Array< LinearFormIntegrator * > * mfem::LinearForm::GetFLFI ( )
inline

Access all integrators added with AddBdrFaceIntegrator().

Definition at line 183 of file linearform.hpp.

◆ GetFLFI_Marker()

Array< Array< int > * > * mfem::LinearForm::GetFLFI_Marker ( )
inline

Access all boundary markers added with AddBdrFaceIntegrator(). If no marker was specified when the integrator was added, the corresponding pointer (to Array<int>) will be NULL.

Definition at line 191 of file linearform.hpp.

◆ GetIFLFI()

Array< LinearFormIntegrator * > * mfem::LinearForm::GetIFLFI ( )
inline

Access all integrators added with AddInteriorFaceIntegrator().

Definition at line 186 of file linearform.hpp.

◆ HaveDeltaLocations()

bool mfem::LinearForm::HaveDeltaLocations ( )
inlineprotected

If true, the delta locations are not (re)computed during assembly.

Definition at line 75 of file linearform.hpp.

◆ MakeRef()

void mfem::LinearForm::MakeRef ( FiniteElementSpace f,
Vector v,
int  v_offset 
)
virtual

Make the LinearForm reference external data on a new FiniteElementSpace.

This method changes the FiniteElementSpace associated with the LinearForm *f and sets the data of the Vector v (plus the v_offset) as external data in the LinearForm.

Note
This version of the method will also perform bounds checks when the build option MFEM_DEBUG is enabled.

Reimplemented in mfem::ParLinearForm.

Definition at line 364 of file linearform.cpp.

◆ operator()()

real_t mfem::LinearForm::operator() ( const GridFunction gf) const
inline

Return the action of the LinearForm as a linear mapping.

Linear forms are linear functionals which map GridFunctions to the real numbers. This method performs this mapping which in this case is equivalent as an inner product of the LinearForm and GridFunction.

Definition at line 242 of file linearform.hpp.

◆ operator=() [1/3]

LinearForm & mfem::LinearForm::operator= ( const LinearForm rhs)
inline

Copy assignment. Only the data of the base class Vector is copied.

It is assumed that this object and rhs use FiniteElementSpaces that have the same size.

Note
Defining this method overwrites the implicitly defined copy assignment operator.

Definition at line 121 of file linearform.hpp.

◆ operator=() [2/3]

LinearForm & mfem::LinearForm::operator= ( const Vector v)

Copy the data from v.

The size of v must be equal to the size of the associated FiniteElementSpace fes.

Definition at line 416 of file linearform.cpp.

◆ operator=() [3/3]

LinearForm & mfem::LinearForm::operator= ( real_t  value)

Redefine '=' for LinearForm = constant.

Definition at line 410 of file linearform.cpp.

◆ ResetDeltaLocations()

void mfem::LinearForm::ResetDeltaLocations ( )
inlineprotected

Force (re)computation of delta locations.

Definition at line 79 of file linearform.hpp.

◆ SupportsDevice()

bool mfem::LinearForm::SupportsDevice ( ) const
virtual

Return true if assembly on device is supported, false otherwise.

Reimplemented in mfem::ParLinearForm.

Definition at line 108 of file linearform.cpp.

◆ Update() [1/3]

void mfem::LinearForm::Update ( )

Update the object according to the associated FE space fes.

This method should be called when the associated FE space fes has been updated, e.g. after its associated Mesh object has been refined.

Note
This method does not perform assembly.

Definition at line 348 of file linearform.cpp.

◆ Update() [2/3]

void mfem::LinearForm::Update ( FiniteElementSpace f)
inline

Associate a new FE space, *f, with this object and Update() it. *‍/.

Definition at line 219 of file linearform.hpp.

◆ Update() [3/3]

void mfem::LinearForm::Update ( FiniteElementSpace f,
Vector v,
int  v_offset 
)

Associate a new FE space, *f, with this object and use the data of v, offset by v_offset, to initialize this object's Vector::data.

Note
This method does not perform assembly.

Definition at line 354 of file linearform.cpp.

◆ UseFastAssembly()

void mfem::LinearForm::UseFastAssembly ( bool  use_fa)

Which assembly algorithm to use: the new device-compatible fast assembly (true), or the legacy CPU-only algorithm (false).

If not set, the default value is false. If used, this method must be called before assembly.

Definition at line 162 of file linearform.cpp.

Member Data Documentation

◆ boundary_face_integs

Array<LinearFormIntegrator*> mfem::LinearForm::boundary_face_integs
protected

Set of Boundary Face Integrators to be applied.

Definition at line 62 of file linearform.hpp.

◆ boundary_face_integs_marker

Array<Array<int>*> mfem::LinearForm::boundary_face_integs_marker
protected

Entries not owned.

Definition at line 63 of file linearform.hpp.

◆ boundary_integs

Array<LinearFormIntegrator*> mfem::LinearForm::boundary_integs
protected

Set of Boundary Integrators to be applied.

Definition at line 57 of file linearform.hpp.

◆ boundary_integs_marker

Array<Array<int>*> mfem::LinearForm::boundary_integs_marker
protected

Entries are not owned.

Definition at line 59 of file linearform.hpp.

◆ domain_delta_integs

Array<DeltaLFIntegrator*> mfem::LinearForm::domain_delta_integs
protected

Separate array for integrators with delta function coefficients.

Definition at line 54 of file linearform.hpp.

◆ domain_delta_integs_elem_id

Array<int> mfem::LinearForm::domain_delta_integs_elem_id
protected

The element ids where the centers of the delta functions lie.

Definition at line 69 of file linearform.hpp.

◆ domain_delta_integs_ip

Array<IntegrationPoint> mfem::LinearForm::domain_delta_integs_ip
protected

The reference coordinates where the centers of the delta functions lie.

Definition at line 72 of file linearform.hpp.

◆ domain_integs

Array<LinearFormIntegrator*> mfem::LinearForm::domain_integs
protected

Set of Domain Integrators to be applied.

Definition at line 45 of file linearform.hpp.

◆ domain_integs_marker

Array<Array<int>*> mfem::LinearForm::domain_integs_marker
protected

Element attribute marker (should be of length mesh->attributes.Max() or 0 if mesh->attributes is empty) Includes all by default. 0 - ignore attribute 1 - include attribute

Definition at line 51 of file linearform.hpp.

◆ ext

LinearFormExtension* mfem::LinearForm::ext = nullptr
protected

Extension for supporting different assembly levels.

Definition at line 33 of file linearform.hpp.

◆ extern_lfs

int mfem::LinearForm::extern_lfs = 0
protected

Indicates the LinearFormIntegrators stored in domain_integs, domain_delta_integs, boundary_integs, and boundary_face_integs are owned by another LinearForm.

Definition at line 42 of file linearform.hpp.

◆ fast_assembly

bool mfem::LinearForm::fast_assembly = false
protected

Should we use the device-compatible fast assembly algorithm (false by default)

Definition at line 37 of file linearform.hpp.

◆ fes

FiniteElementSpace* mfem::LinearForm::fes
protected

FE space on which the LinearForm lives. Not owned.

Definition at line 30 of file linearform.hpp.

◆ interior_face_integs

Array<LinearFormIntegrator*> mfem::LinearForm::interior_face_integs
protected

Set of Internal Face Integrators to be applied.

Definition at line 66 of file linearform.hpp.


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