MFEM
v4.0
Finite element discretization library
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Class representing a function through its values (scalar or vector) at quadrature points. More...
#include <gridfunc.hpp>
Public Member Functions | |
QuadratureFunction () | |
Create an empty QuadratureFunction. More... | |
QuadratureFunction (const QuadratureFunction &orig) | |
Copy constructor. The QuadratureSpace ownership flag, own_qspace, in the new object is set to false. 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 () |
QuadratureSpace * | GetSpace () 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... | |
QuadratureFunction & | operator= (double value) |
Redefine '=' for QuadratureFunction = constant. More... | |
QuadratureFunction & | operator= (const Vector &v) |
Copy the data from v. More... | |
QuadratureFunction & | operator= (const QuadratureFunction &v) |
Copy assignment. Only the data of the base class Vector is copied. More... | |
const IntegrationRule & | GetElementIntRule (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... | |
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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... | |
Vector (int size_, MemoryType mt) | |
Create a Vector of size size_ using MemoryType mt. More... | |
void | UseDevice (bool use_dev) const |
Enable execution of Vector operations using the mfem::Device. More... | |
bool | UseDevice () const |
Return the device flag of the Memory object used by the Vector. 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 | SetSize (int s, MemoryType mt) |
Resize the vector to size s using MemoryType mt. More... | |
void | SetSize (int s, Vector &v) |
Resize the vector to size s using the MemoryType of v. 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 | NewMemoryAndSize (const Memory< double > &mem, int s, bool own_mem) |
Reset the Vector to use the given external Memory mem and size s. More... | |
void | MakeDataOwner () const |
Set the Vector data (host pointer) ownership flag. More... | |
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... | |
Memory< double > & | GetMemory () |
Return a reference to the Memory object used by the Vector. More... | |
const Memory< double > & | GetMemory () const |
Return a reference to the Memory object used by the Vector, const version. More... | |
void | SyncMemory (const Vector &v) |
Update the memory location of the vector to match v. More... | |
void | SyncAliasMemory (const Vector &v) |
Update the alias memory location of the vector to match v. More... | |
bool | OwnsData () const |
Read the Vector data (host pointer) ownership flag. More... | |
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... | |
Vector & | operator= (const double *v) |
Copy Size() entries from v. More... | |
Vector & | operator= (const Vector &v) |
Copy assignment. More... | |
Vector & | operator= (double value) |
Redefine '=' for vector = constant. More... | |
Vector & | operator*= (double c) |
Vector & | operator/= (double c) |
Vector & | operator-= (double c) |
Vector & | operator-= (const Vector &v) |
Vector & | operator+= (const Vector &v) |
Vector & | Add (const double a, const Vector &Va) |
(*this) += a * Va More... | |
Vector & | Set (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 |
Count the number of entries in the Vector for which isfinite is false, i.e. the entry is a NaN or +/-Inf. More... | |
virtual | ~Vector () |
Destroys vector. More... | |
const double * | Read (bool on_dev=true) const |
Shortcut for mfem::Read(vec.GetMemory(), vec.Size(), on_dev). More... | |
const double * | HostRead () const |
Shortcut for mfem::Read(vec.GetMemory(), vec.Size(), false). More... | |
double * | Write (bool on_dev=true) |
Shortcut for mfem::Write(vec.GetMemory(), vec.Size(), on_dev). More... | |
double * | HostWrite () |
Shortcut for mfem::Write(vec.GetMemory(), vec.Size(), false). More... | |
double * | ReadWrite (bool on_dev=true) |
Shortcut for mfem::ReadWrite(vec.GetMemory(), vec.Size(), on_dev). More... | |
double * | HostReadWrite () |
Shortcut for mfem::ReadWrite(vec.GetMemory(), vec.Size(), false). 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 | |
QuadratureSpace * | qspace |
Associated QuadratureSpace. More... | |
int | vdim |
Vector dimension. More... | |
bool | own_qspace |
QuadratureSpace ownership flag. More... | |
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Memory< double > | data |
int | size |
Class representing a function through its values (scalar or vector) at quadrature points.
Definition at line 494 of file gridfunc.hpp.
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Create an empty QuadratureFunction.
The object can be initialized later using the SetSpace() methods.
Definition at line 504 of file gridfunc.hpp.
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Copy constructor. The QuadratureSpace ownership flag, own_qspace, in the new object is set to false.
Definition at line 509 of file gridfunc.hpp.
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Create a QuadratureFunction based on the given QuadratureSpace.
The QuadratureFunction does not assume ownership of the QuadratureSpace.
Definition at line 516 of file gridfunc.hpp.
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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 524 of file gridfunc.hpp.
mfem::QuadratureFunction::QuadratureFunction | ( | Mesh * | mesh, |
std::istream & | in | ||
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Read a QuadratureFunction from the stream in.
The QuadratureFunction assumes ownership of the read QuadratureSpace.
Definition at line 2850 of file gridfunc.cpp.
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Definition at line 532 of file gridfunc.hpp.
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Get the IntegrationRule associated with mesh element idx.
Definition at line 591 of file gridfunc.hpp.
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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 696 of file gridfunc.hpp.
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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 703 of file gridfunc.hpp.
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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 715 of file gridfunc.hpp.
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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 722 of file gridfunc.hpp.
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Get the associated QuadratureSpace.
Definition at line 535 of file gridfunc.hpp.
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Get the vector dimension.
Definition at line 562 of file gridfunc.hpp.
QuadratureFunction & mfem::QuadratureFunction::operator= | ( | double | value | ) |
Redefine '=' for QuadratureFunction = constant.
Definition at line 2864 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 associated QuadratureSpace qspace.
Definition at line 2870 of file gridfunc.cpp.
QuadratureFunction & mfem::QuadratureFunction::operator= | ( | const QuadratureFunction & | v | ) |
Copy assignment. Only the data of the base class Vector is copied.
The QuadratureFunctions v and *this must have QuadratureSpaces with the same size.
Definition at line 2877 of file gridfunc.cpp.
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Get the QuadratureSpace ownership flag.
Definition at line 569 of file gridfunc.hpp.
void mfem::QuadratureFunction::Save | ( | std::ostream & | out | ) | const |
Write the QuadratureFunction to the stream out.
Definition at line 2882 of file gridfunc.cpp.
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Set the QuadratureSpace ownership flag.
Definition at line 572 of file gridfunc.hpp.
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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 671 of file gridfunc.hpp.
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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 683 of file gridfunc.hpp.
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Set the vector dimension, updating the size by calling Vector::SetSize().
Definition at line 565 of file gridfunc.hpp.
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QuadratureSpace ownership flag.
Definition at line 499 of file gridfunc.hpp.
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Associated QuadratureSpace.
Definition at line 497 of file gridfunc.hpp.
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Vector dimension.
Definition at line 498 of file gridfunc.hpp.