Reference documentation for deal.II version Git 180dc024a7 2020-01-22 00:40:46 -0500
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Public Member Functions | Static Public Attributes | Private Attributes | List of all members
TensorProductPolynomialsConst< dim > Class Template Reference

#include <deal.II/base/tensor_product_polynomials_const.h>

Inheritance diagram for TensorProductPolynomialsConst< dim >:
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Public Member Functions

template<class Pol >
 TensorProductPolynomialsConst (const std::vector< Pol > &pols)
 
void output_indices (std::ostream &out) const
 
void set_numbering (const std::vector< unsigned int > &renumber)
 
const std::vector< unsigned int > & get_numbering () const
 
const std::vector< unsigned int > & get_numbering_inverse () const
 
void evaluate (const Point< dim > &unit_point, std::vector< double > &values, std::vector< Tensor< 1, dim >> &grads, std::vector< Tensor< 2, dim >> &grad_grads, std::vector< Tensor< 3, dim >> &third_derivatives, std::vector< Tensor< 4, dim >> &fourth_derivatives) const override
 
double compute_value (const unsigned int i, const Point< dim > &p) const
 
template<int order>
Tensor< order, dim > compute_derivative (const unsigned int i, const Point< dim > &p) const
 
Tensor< 1, dim > compute_grad (const unsigned int i, const Point< dim > &p) const
 
Tensor< 2, dim > compute_grad_grad (const unsigned int i, const Point< dim > &p) const
 
unsigned int n () const
 
std::string name () const override
 
virtual std::unique_ptr< ScalarPolynomialsBase< dim > > clone () const override
 
- Public Member Functions inherited from ScalarPolynomialsBase< dim >
 ScalarPolynomialsBase (const unsigned int deg, const unsigned int n_polynomials)
 
 ScalarPolynomialsBase (ScalarPolynomialsBase< dim > &&)=default
 
 ScalarPolynomialsBase (const ScalarPolynomialsBase< dim > &)=default
 
virtual ~ScalarPolynomialsBase ()=default
 
unsigned int n () const
 
unsigned int degree () const
 
virtual std::size_t memory_consumption () const
 

Static Public Attributes

static const unsigned int dimension = dim
 

Private Attributes

TensorProductPolynomials< dim > tensor_polys
 
std::vector< unsigned int > index_map
 
std::vector< unsigned int > index_map_inverse
 

Detailed Description

template<int dim>
class TensorProductPolynomialsConst< dim >

Tensor product of given polynomials and a locally constant function. This class inherits most of its functionality from TensorProductPolynomials. It works similarly to that class but adds a constant function for the last index.

Author
Timo Heister, 2012

Definition at line 39 of file tensor_product_polynomials.h.

Constructor & Destructor Documentation

◆ TensorProductPolynomialsConst()

template<int dim>
template<class Pol >
TensorProductPolynomialsConst< dim >::TensorProductPolynomialsConst ( const std::vector< Pol > &  pols)

Constructor. pols is a vector of objects that should be derived or otherwise convertible to one-dimensional polynomial objects. It will be copied element by element into a private variable.

Member Function Documentation

◆ output_indices()

template<int dim>
void TensorProductPolynomialsConst< dim >::output_indices ( std::ostream &  out) const

Print the list of tensor_polys indices to out.

Definition at line 31 of file tensor_product_polynomials_const.cc.

◆ set_numbering()

template<int dim>
void TensorProductPolynomialsConst< dim >::set_numbering ( const std::vector< unsigned int > &  renumber)

Set the ordering of the polynomials. Requires renumber.size()==tensor_polys.n(). Stores a copy of renumber.

Definition at line 48 of file tensor_product_polynomials_const.cc.

◆ get_numbering()

template<int dim>
const std::vector<unsigned int>& TensorProductPolynomialsConst< dim >::get_numbering ( ) const

Give read access to the renumber vector.

◆ get_numbering_inverse()

template<int dim>
const std::vector<unsigned int>& TensorProductPolynomialsConst< dim >::get_numbering_inverse ( ) const

Give read access to the inverse renumber vector.

◆ evaluate()

template<int dim>
void TensorProductPolynomialsConst< dim >::evaluate ( const Point< dim > &  unit_point,
std::vector< double > &  values,
std::vector< Tensor< 1, dim >> &  grads,
std::vector< Tensor< 2, dim >> &  grad_grads,
std::vector< Tensor< 3, dim >> &  third_derivatives,
std::vector< Tensor< 4, dim >> &  fourth_derivatives 
) const
overridevirtual

Compute the value and the first and second derivatives of each tensor product polynomial at unit_point.

The size of the vectors must either be equal 0 or equal n(). In the first case, the function will not compute these values.

If you need values or derivatives of all tensor product polynomials then use this function, rather than using any of the compute_value(), compute_grad() or compute_grad_grad() functions, see below, in a loop over all tensor product polynomials.

Implements ScalarPolynomialsBase< dim >.

Definition at line 128 of file tensor_product_polynomials_const.cc.

◆ compute_value()

template<int dim>
double TensorProductPolynomialsConst< dim >::compute_value ( const unsigned int  i,
const Point< dim > &  p 
) const

Compute the value of the ith tensor product polynomial at unit_point. Here i is given in tensor product numbering.

Note, that using this function within a loop over all tensor product polynomials is not efficient, because then each point value of the underlying (one-dimensional) polynomials is (unnecessarily) computed several times. Instead use the compute() function with values.size()==n() to get the point values of all tensor polynomials all at once and in a much more efficient way.

Definition at line 68 of file tensor_product_polynomials_const.cc.

◆ compute_derivative()

template<int dim>
template<int order>
Tensor<order, dim> TensorProductPolynomialsConst< dim >::compute_derivative ( const unsigned int  i,
const Point< dim > &  p 
) const

Compute the orderth derivative of the ith tensor product polynomial at unit_point. Here i is given in tensor product numbering.

Note, that using this function within a loop over all tensor product polynomials is not efficient, because then each derivative value of the underlying (one-dimensional) polynomials is (unnecessarily) computed several times. Instead use the compute() function, see above, with the size of the appropriate parameter set to n() to get the point value of all tensor polynomials all at once and in a much more efficient way.

Template Parameters
orderThe derivative order.

◆ compute_grad()

template<int dim>
Tensor< 1, dim > TensorProductPolynomialsConst< dim >::compute_grad ( const unsigned int  i,
const Point< dim > &  p 
) const

Compute the grad of the ith tensor product polynomial at unit_point. Here i is given in tensor product numbering.

Note, that using this function within a loop over all tensor product polynomials is not efficient, because then each derivative value of the underlying (one-dimensional) polynomials is (unnecessarily) computed several times. Instead use the compute() function, see above, with grads.size()==n() to get the point value of all tensor polynomials all at once and in a much more efficient way.

Definition at line 96 of file tensor_product_polynomials_const.cc.

◆ compute_grad_grad()

template<int dim>
Tensor< 2, dim > TensorProductPolynomialsConst< dim >::compute_grad_grad ( const unsigned int  i,
const Point< dim > &  p 
) const

Compute the second derivative (grad_grad) of the ith tensor product polynomial at unit_point. Here i is given in tensor product numbering.

Note, that using this function within a loop over all tensor product polynomials is not efficient, because then each derivative value of the underlying (one-dimensional) polynomials is (unnecessarily) computed several times. Instead use the compute() function, see above, with grad_grads.size()==n() to get the point value of all tensor polynomials all at once and in a much more efficient way.

Definition at line 112 of file tensor_product_polynomials_const.cc.

◆ n()

template<int dim>
unsigned int TensorProductPolynomialsConst< dim >::n ( ) const

Return the number of tensor product polynomials plus the constant function. For n 1d polynomials this is ndim+1.

◆ name()

template<int dim>
std::string TensorProductPolynomialsConst< dim >::name ( ) const
overridevirtual

Return the name of the space, which is TensorProductPolynomialsConst.

Implements ScalarPolynomialsBase< dim >.

◆ clone()

template<int dim>
std::unique_ptr< ScalarPolynomialsBase< dim > > TensorProductPolynomialsConst< dim >::clone ( ) const
overridevirtual

A sort of virtual copy constructor, this function returns a copy of the polynomial space object. Derived classes need to override the function here in this base class and return an object of the same type as the derived class.

Some places in the library, for example the constructors of FE_Poly, need to make copies of polynomial spaces without knowing their exact type. They do so through this function.

Implements ScalarPolynomialsBase< dim >.

Definition at line 204 of file tensor_product_polynomials_const.cc.

Member Data Documentation

◆ dimension

template<int dim>
const unsigned int TensorProductPolynomialsConst< dim >::dimension = dim
static

Access to the dimension of this object, for checking and automatic setting of dimension in other classes.

Definition at line 55 of file tensor_product_polynomials_const.h.

◆ tensor_polys

template<int dim>
TensorProductPolynomials<dim> TensorProductPolynomialsConst< dim >::tensor_polys
private

The TensorProductPolynomials object

Definition at line 198 of file tensor_product_polynomials_const.h.

◆ index_map

template<int dim>
std::vector<unsigned int> TensorProductPolynomialsConst< dim >::index_map
private

Index map for reordering the polynomials.

Definition at line 203 of file tensor_product_polynomials_const.h.

◆ index_map_inverse

template<int dim>
std::vector<unsigned int> TensorProductPolynomialsConst< dim >::index_map_inverse
private

Index map for reordering the polynomials.

Definition at line 208 of file tensor_product_polynomials_const.h.


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