internal::GenericDoFsPerObject Struct Reference

#include <deal.II/fe/fe_data.h>

Static Public Member Functions
template<int dim>
static GenericDoFsPerObject	generate (const FiniteElementData< dim > &fe)

Public Attributes
std::vector< std::vector< unsigned int > >	dofs_per_object_exclusive
std::vector< std::vector< unsigned int > >	dofs_per_object_inclusive
std::vector< std::vector< unsigned int > >	object_index
std::vector< std::vector< unsigned int > >	first_object_index_on_face

Detailed Description

Internal data structure for setting up FiniteElementData. It stores for each object the (inclusive/exclusive) number of degrees of freedoms, as well as the index of its first degree of freedom within a cell and the index of the first d-dimensional object within each face. Here, inclusive means "the number of DoFs located on this object as well as the lower-dimensional objects that bound it", and exclusive is then the number not including the lower-dimensional objects.

The information is saved as a vector of vectors. One can query the inclusive number of dofs of the i-th d-dimensional object via: dofs_per_object_inclusive[d][i].

As an example, the data is shown for a quadratic wedge. Which consists of 6 vertices, 9 lines, and 5 faces (two triangles and three quadrilaterals).

           vertices            lines                  faces      cell
dpo_excl  1 1 1 1 1 1 | 1 1 1 1  1  1  1  1  1 |  0  0  1  1  1 |  0
dpo_incl  1 1 1 1 1 1 | 3 3 3 3  3  3  3  3  3 |  6  6  9  9  9 | 18
obj_index 0 1 2 3 4 5 | 6 7 8 9 10 11 12 13 14 | 15 15 15 16 17 | 18

The above table has these numbers because of the following considerations:

• For each triangular face:

  dpo_excl  1  1  1 | 1  1  1 |  0
  obj_index 0  1  2 | 3  4  5 |  6

• For each quadrilateral face:

  dpo_excl  1  1  1  1 | 1  1  1  1 |  1
  obj_index 0  1  2  3 | 4  5  6  7 |  8

The index of the first d-dimensional object within each face results as:

                        vertices      lines       face
first_obj_index_on_face 0 0 0 0 0 | 3 3 4 4 4 | 6 6 8 8 8

Definition at line 182 of file fe_data.h.

Member Function Documentation

generate()

template<int dim>

static GenericDoFsPerObject internal::GenericDoFsPerObject::generate ( const FiniteElementData< dim > &  fe )

static

Function that fills the fields based on a provided finite element.

Member Data Documentation

dofs_per_object_exclusive

std::vector<std::vector<unsigned int> > internal::GenericDoFsPerObject::dofs_per_object_exclusive

Exclusive number of degrees of freedom per object.

Definition at line 187 of file fe_data.h.

dofs_per_object_inclusive

std::vector<std::vector<unsigned int> > internal::GenericDoFsPerObject::dofs_per_object_inclusive

Inclusive number of degrees of freedom per object.

Definition at line 192 of file fe_data.h.

object_index

std::vector<std::vector<unsigned int> > internal::GenericDoFsPerObject::object_index

First index of an object.

Definition at line 197 of file fe_data.h.

first_object_index_on_face

std::vector<std::vector<unsigned int> > internal::GenericDoFsPerObject::first_object_index_on_face

First index of an object within a face.

Definition at line 202 of file fe_data.h.

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The documentation for this struct was generated from the following file:

• include/deal.II/fe/fe_data.h