MFEM  v3.4
Finite element discretization library
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mfem::QuadratureFunction Class Reference

Class representing a function through its values (scalar or vector) at quadrature points. More...

#include <gridfunc.hpp>

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

 QuadratureFunction ()
 Create an empty QuadratureFunction. More...
 
 QuadratureFunction (QuadratureSpace *qspace_, int vdim_=1)
 Create a QuadratureFunction based on the given QuadratureSpace. More...
 
 QuadratureFunction (QuadratureSpace *qspace_, double *qf_data, int vdim_=1)
 Create a QuadratureFunction based on the given QuadratureSpace, using the external data, qf_data. More...
 
 QuadratureFunction (Mesh *mesh, std::istream &in)
 Read a QuadratureFunction from the stream in. More...
 
virtual ~QuadratureFunction ()
 
QuadratureSpaceGetSpace () const
 Get the associated QuadratureSpace. More...
 
void SetSpace (QuadratureSpace *qspace_, int vdim_=-1)
 Change the QuadratureSpace and optionally the vector dimension. More...
 
void SetSpace (QuadratureSpace *qspace_, double *qf_data, int vdim_=-1)
 Change the QuadratureSpace, the data array, and optionally the vector dimension. More...
 
int GetVDim () const
 Get the vector dimension. More...
 
void SetVDim (int vdim_)
 Set the vector dimension, updating the size by calling Vector::SetSize(). More...
 
bool OwnsSpace ()
 Get the QuadratureSpace ownership flag. More...
 
void SetOwnsSpace (bool own)
 Set the QuadratureSpace ownership flag. More...
 
QuadratureFunctionoperator= (double value)
 Redefine '=' for QuadratureFunction = constant. More...
 
QuadratureFunctionoperator= (const Vector &v)
 Copy the data from v. More...
 
QuadratureFunctionoperator= (const QuadratureFunction &v)
 Copy the data from v. More...
 
const IntegrationRuleGetElementIntRule (int idx) const
 Get the IntegrationRule associated with mesh element idx. More...
 
void GetElementValues (int idx, Vector &values)
 Return all values associated with mesh element idx in a Vector. More...
 
void GetElementValues (int idx, Vector &values) const
 Return all values associated with mesh element idx in a Vector. More...
 
void GetElementValues (int idx, DenseMatrix &values)
 Return all values associated with mesh element idx in a DenseMatrix. More...
 
void GetElementValues (int idx, DenseMatrix &values) const
 Return all values associated with mesh element idx in a const DenseMatrix. More...
 
void Save (std::ostream &out) const
 Write the QuadratureFunction to the stream out. More...
 
- Public Member Functions inherited from mfem::Vector
 Vector ()
 Default constructor for Vector. Sets size = 0 and data = NULL. More...
 
 Vector (const Vector &)
 Copy constructor. Allocates a new data array and copies the data. More...
 
 Vector (int s)
 Creates vector of size s. More...
 
 Vector (double *_data, int _size)
 Creates a vector referencing an array of doubles, owned by someone else. More...
 
void Load (std::istream **in, int np, int *dim)
 Reads a vector from multiple files. More...
 
void Load (std::istream &in, int Size)
 Load a vector from an input stream. More...
 
void Load (std::istream &in)
 Load a vector from an input stream, reading the size from the stream. More...
 
void SetSize (int s)
 Resize the vector to size s. More...
 
void SetData (double *d)
 
void SetDataAndSize (double *d, int s)
 Set the Vector data and size. More...
 
void NewDataAndSize (double *d, int s)
 Set the Vector data and size, deleting the old data, if owned. More...
 
void MakeDataOwner ()
 
void Destroy ()
 Destroy a vector. More...
 
int Size () const
 Returns the size of the vector. More...
 
int Capacity () const
 Return the size of the currently allocated data array. More...
 
double * GetData () const
 Return a pointer to the beginning of the Vector data. More...
 
 operator double * ()
 Conversion to double *. More...
 
 operator const double * () const
 Conversion to const double *. More...
 
bool OwnsData () const
 
void StealData (double **p)
 Changes the ownership of the data; after the call the Vector is empty. More...
 
double * StealData ()
 Changes the ownership of the data; after the call the Vector is empty. More...
 
double & Elem (int i)
 Access Vector entries. Index i = 0 .. size-1. More...
 
const double & Elem (int i) const
 Read only access to Vector entries. Index i = 0 .. size-1. More...
 
double & operator() (int i)
 Access Vector entries using () for 0-based indexing. More...
 
const double & operator() (int i) const
 Read only access to Vector entries using () for 0-based indexing. More...
 
double operator* (const double *) const
 Dot product with a double * array. More...
 
double operator* (const Vector &v) const
 Return the inner-product. More...
 
Vectoroperator= (const double *v)
 Copy Size() entries from v. More...
 
Vectoroperator= (const Vector &v)
 Redefine '=' for vector = vector. More...
 
Vectoroperator= (double value)
 Redefine '=' for vector = constant. More...
 
Vectoroperator*= (double c)
 
Vectoroperator/= (double c)
 
Vectoroperator-= (double c)
 
Vectoroperator-= (const Vector &v)
 
Vectoroperator+= (const Vector &v)
 
VectorAdd (const double a, const Vector &Va)
 (*this) += a * Va More...
 
VectorSet (const double a, const Vector &x)
 (*this) = a * x More...
 
void SetVector (const Vector &v, int offset)
 
void Neg ()
 (*this) = -(*this) More...
 
void Swap (Vector &other)
 Swap the contents of two Vectors. More...
 
void median (const Vector &lo, const Vector &hi)
 v = median(v,lo,hi) entrywise. Implementation assumes lo <= hi. More...
 
void GetSubVector (const Array< int > &dofs, Vector &elemvect) const
 
void GetSubVector (const Array< int > &dofs, double *elem_data) const
 
void SetSubVector (const Array< int > &dofs, const double value)
 Set the entries listed in dofs to the given value. More...
 
void SetSubVector (const Array< int > &dofs, const Vector &elemvect)
 
void SetSubVector (const Array< int > &dofs, double *elem_data)
 
void AddElementVector (const Array< int > &dofs, const Vector &elemvect)
 Add (element) subvector to the vector. More...
 
void AddElementVector (const Array< int > &dofs, double *elem_data)
 
void AddElementVector (const Array< int > &dofs, const double a, const Vector &elemvect)
 
void SetSubVectorComplement (const Array< int > &dofs, const double val)
 Set all vector entries NOT in the 'dofs' array to the given 'val'. More...
 
void Print (std::ostream &out=mfem::out, int width=8) const
 Prints vector to stream out. More...
 
void Print_HYPRE (std::ostream &out) const
 Prints vector to stream out in HYPRE_Vector format. More...
 
void Randomize (int seed=0)
 Set random values in the vector. More...
 
double Norml2 () const
 Returns the l2 norm of the vector. More...
 
double Normlinf () const
 Returns the l_infinity norm of the vector. More...
 
double Norml1 () const
 Returns the l_1 norm of the vector. More...
 
double Normlp (double p) const
 Returns the l_p norm of the vector. More...
 
double Max () const
 Returns the maximal element of the vector. More...
 
double Min () const
 Returns the minimal element of the vector. More...
 
double Sum () const
 Return the sum of the vector entries. More...
 
double DistanceSquaredTo (const double *p) const
 Compute the square of the Euclidean distance to another vector. More...
 
double DistanceTo (const double *p) const
 Compute the Euclidean distance to another vector. More...
 
int CheckFinite () const
 
virtual ~Vector ()
 Destroys vector. More...
 
 Vector (N_Vector nv)
 Construct a wrapper Vector from SUNDIALS N_Vector. More...
 
virtual N_Vector ToNVector ()
 Return a new wrapper SUNDIALS N_Vector of type SUNDIALS_NVEC_SERIAL. More...
 
virtual void ToNVector (N_Vector &nv)
 Update an existing wrapper SUNDIALS N_Vector to point to this Vector. More...
 

Protected Attributes

QuadratureSpaceqspace
 Associated QuadratureSpace. More...
 
int vdim
 Vector dimension. More...
 
bool own_qspace
 QuadratureSpace ownership flag. More...
 
- Protected Attributes inherited from mfem::Vector
int size
 
int allocsize
 
double * data
 

Detailed Description

Class representing a function through its values (scalar or vector) at quadrature points.

Definition at line 401 of file gridfunc.hpp.

Constructor & Destructor Documentation

mfem::QuadratureFunction::QuadratureFunction ( )
inline

Create an empty QuadratureFunction.

The object can be initialized later using the SetSpace() methods.

Definition at line 411 of file gridfunc.hpp.

mfem::QuadratureFunction::QuadratureFunction ( QuadratureSpace qspace_,
int  vdim_ = 1 
)
inline

Create a QuadratureFunction based on the given QuadratureSpace.

The QuadratureFunction does not assume ownership of the QuadratureSpace.

Note
The Vector data is not initialized.

Definition at line 417 of file gridfunc.hpp.

mfem::QuadratureFunction::QuadratureFunction ( QuadratureSpace qspace_,
double *  qf_data,
int  vdim_ = 1 
)
inline

Create a QuadratureFunction based on the given QuadratureSpace, using the external data, qf_data.

The QuadratureFunction does not assume ownership of neither the QuadratureSpace nor the external data.

Definition at line 425 of file gridfunc.hpp.

mfem::QuadratureFunction::QuadratureFunction ( Mesh mesh,
std::istream &  in 
)

Read a QuadratureFunction from the stream in.

The QuadratureFunction assumes ownership of the read QuadratureSpace.

Definition at line 2572 of file gridfunc.cpp.

virtual mfem::QuadratureFunction::~QuadratureFunction ( )
inlinevirtual

Definition at line 433 of file gridfunc.hpp.

Member Function Documentation

const IntegrationRule& mfem::QuadratureFunction::GetElementIntRule ( int  idx) const
inline

Get the IntegrationRule associated with mesh element idx.

Definition at line 489 of file gridfunc.hpp.

void mfem::QuadratureFunction::GetElementValues ( int  idx,
Vector values 
)
inline

Return all values associated with mesh element idx in a Vector.

The result is stored in the Vector values as a reference to the global values.

Inside the Vector values, the index i+vdim*j corresponds to the i-th vector component at the j-th quadrature point.

Definition at line 594 of file gridfunc.hpp.

void mfem::QuadratureFunction::GetElementValues ( int  idx,
Vector values 
) const
inline

Return all values associated with mesh element idx in a Vector.

The result is stored in the Vector values as a copy of the global values.

Inside the Vector values, the index i+vdim*j corresponds to the i-th vector component at the j-th quadrature point.

Definition at line 601 of file gridfunc.hpp.

void mfem::QuadratureFunction::GetElementValues ( int  idx,
DenseMatrix values 
)
inline

Return all values associated with mesh element idx in a DenseMatrix.

The result is stored in the DenseMatrix values as a reference to the global values.

Inside the DenseMatrix values, the (i,j) entry corresponds to the i-th vector component at the j-th quadrature point.

Definition at line 613 of file gridfunc.hpp.

void mfem::QuadratureFunction::GetElementValues ( int  idx,
DenseMatrix values 
) const
inline

Return all values associated with mesh element idx in a const DenseMatrix.

The result is stored in the DenseMatrix values as a copy of the global values.

Inside the DenseMatrix values, the (i,j) entry corresponds to the i-th vector component at the j-th quadrature point.

Definition at line 620 of file gridfunc.hpp.

QuadratureSpace* mfem::QuadratureFunction::GetSpace ( ) const
inline

Get the associated QuadratureSpace.

Definition at line 436 of file gridfunc.hpp.

int mfem::QuadratureFunction::GetVDim ( ) const
inline

Get the vector dimension.

Definition at line 463 of file gridfunc.hpp.

QuadratureFunction & mfem::QuadratureFunction::operator= ( double  value)

Redefine '=' for QuadratureFunction = constant.

Definition at line 2586 of file gridfunc.cpp.

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

Copy the data from v.

The size of v must be equal to the size of the QuadratureSpace qspace.

Definition at line 2592 of file gridfunc.cpp.

QuadratureFunction & mfem::QuadratureFunction::operator= ( const QuadratureFunction v)

Copy the data from v.

The QuadratureFunctions v and *this must have QuadratureSpaces with the same size.

Definition at line 2599 of file gridfunc.cpp.

bool mfem::QuadratureFunction::OwnsSpace ( )
inline

Get the QuadratureSpace ownership flag.

Definition at line 470 of file gridfunc.hpp.

void mfem::QuadratureFunction::Save ( std::ostream &  out) const

Write the QuadratureFunction to the stream out.

Definition at line 2604 of file gridfunc.cpp.

void mfem::QuadratureFunction::SetOwnsSpace ( bool  own)
inline

Set the QuadratureSpace ownership flag.

Definition at line 473 of file gridfunc.hpp.

void mfem::QuadratureFunction::SetSpace ( QuadratureSpace qspace_,
int  vdim_ = -1 
)
inline

Change the QuadratureSpace and optionally the vector dimension.

If the new QuadratureSpace is different from the current one, the QuadratureFunction will not assume ownership of the new space; otherwise, the ownership flag remains the same.

If the new vector dimension vdim_ < 0, the vector dimension remains the same.

The data size is updated by calling Vector::SetSize().

Definition at line 569 of file gridfunc.hpp.

void mfem::QuadratureFunction::SetSpace ( QuadratureSpace qspace_,
double *  qf_data,
int  vdim_ = -1 
)
inline

Change the QuadratureSpace, the data array, and optionally the vector dimension.

If the new QuadratureSpace is different from the current one, the QuadratureFunction will not assume ownership of the new space; otherwise, the ownership flag remains the same.

If the new vector dimension vdim_ < 0, the vector dimension remains the same.

The data array is replaced by calling Vector::NewDataAndSize().

Definition at line 581 of file gridfunc.hpp.

void mfem::QuadratureFunction::SetVDim ( int  vdim_)
inline

Set the vector dimension, updating the size by calling Vector::SetSize().

Definition at line 466 of file gridfunc.hpp.

Member Data Documentation

bool mfem::QuadratureFunction::own_qspace
protected

QuadratureSpace ownership flag.

Definition at line 406 of file gridfunc.hpp.

QuadratureSpace* mfem::QuadratureFunction::qspace
protected

Associated QuadratureSpace.

Definition at line 404 of file gridfunc.hpp.

int mfem::QuadratureFunction::vdim
protected

Vector dimension.

Definition at line 405 of file gridfunc.hpp.


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