Geometry< T > Class Template Reference

Geometry stores the geometry imposed on a mesh. More...

#include <Geometry.h>

Public Types
using	value_type = T
	Value type.

Public Member Functions
template<typename U, typename V, typename W> requires std::is_convertible_v<std::remove_cvref_t<U>, std::vector<std::vector<std::int32_t>>> and std::is_convertible_v<std::remove_cvref_t<V>, std::vector<T>> and std::is_convertible_v<std::remove_cvref_t<W>, std::vector<std::int64_t>>
	Geometry (std::shared_ptr< const common::IndexMap > index_map, U &&dofmaps, const std::vector< fem::CoordinateElement< typename std::remove_reference_t< typename V::value_type > > > &elements, V &&x, int dim, W &&input_global_indices)
	Constructor of object that holds mesh geometry data.
	Geometry (const Geometry &)=default
	Copy constructor.
	Geometry (Geometry &&)=default
	Move constructor.
	~Geometry ()=default
	Destructor.
Geometry &	operator= (const Geometry &)=delete
	Copy assignment.
Geometry &	operator= (Geometry &&)=default
	Move assignment.
int	dim () const
	Return dimension of the Euclidean coordinate system.
md::mdspan< const std::int32_t, md::dextents< std::size_t, 2 > >	dofmap () const
	DofMap for the geometry.
md::mdspan< const std::int32_t, md::dextents< std::size_t, 2 > >	dofmap (std::size_t i) const
	Degree-of-freedom map associated with the ith coordinate map element in the geometry.
std::shared_ptr< const common::IndexMap >	index_map () const
	Index map for the geometry 'degrees-of-freedom'.
std::span< const value_type >	x () const
	Access geometry degrees-of-freedom data (const version).
std::span< value_type >	x ()
	Access geometry degrees-of-freedom data (non-const version).
const std::vector< fem::CoordinateElement< value_type > > &	cmaps () const
	The elements that describes the geometry map.
const fem::CoordinateElement< value_type > &	cmap () const
	The element that describes the geometry map.
const std::vector< std::int64_t > &	input_global_indices () const
	Global user indices.

Detailed Description

template<std::floating_point T>
class dolfinx::mesh::Geometry< T >

Geometry stores the geometry imposed on a mesh.

Constructor & Destructor Documentation

Geometry()

template<std::floating_point T>

template<typename U, typename V, typename W>
requires std::is_convertible_v<std::remove_cvref_t<U>, std::vector<std::vector<std::int32_t>>> and std::is_convertible_v<std::remove_cvref_t<V>, std::vector<T>> and std::is_convertible_v<std::remove_cvref_t<W>, std::vector<std::int64_t>>

Geometry ( std::shared_ptr< const common::IndexMap > index_map, U && dofmaps, const std::vector< fem::CoordinateElement< typename std::remove_reference_t< typename V::value_type > > > & elements, V && x, int dim, W && input_global_indices )

inline

Constructor of object that holds mesh geometry data.

The geometry 'degree-of-freedom map' is a logically rectangular array (row-major) where each row corresponds to a cell, and the columns are the indices in the coordinate array of the cell coordinate degree-of-freedom. For each cell type there is a geometry degree-of-freedom map.

Parameters

[in]	index_map	Index map associated with the geometry degrees-of-freedom.
[in]	dofmaps	The geometry (point) dofmaps for each cell type in the mesh. For a cell of a given type, the dofmap gives the position in the point array of each local geometry node of the cell. Each cell type has its own dofmap. Each dofmap uses row-major storage.
[in]	elements	Elements that describe cell geometry maps. element[i] is the coordinate element associated with dofmaps[i].
[in]	x	Point coordinates. The shape is (num_points, 3) and the storage is row-major.
[in]	dim	The geometric dimension (0 < dim <= 3).
[in]	input_global_indices	'Global' input index of each point, commonly from a mesh input file.

Member Function Documentation

cmap()

template<std::floating_point T>

const fem::CoordinateElement< value_type > & cmap ( ) const

inline

The element that describes the geometry map.

Returns

The coordinate/geometry element

cmaps()

template<std::floating_point T>

const std::vector< fem::CoordinateElement< value_type > > & cmaps ( ) const

inline

The elements that describes the geometry map.

The coordinate element cmaps()[i] corresponds to the degree-of-freedom map dofmap(i).

Returns

The coordinate/geometry elements.

dofmap() [1/2]

template<std::floating_point T>

md::mdspan< const std::int32_t, md::dextents< std::size_t, 2 > > dofmap ( ) const

inline

DofMap for the geometry.

Returns

A 2D array with shape (num_cells, dofs_per_cell).

dofmap() [2/2]

template<std::floating_point T>

md::mdspan< const std::int32_t, md::dextents< std::size_t, 2 > > dofmap ( std::size_t i ) const

inline

Degree-of-freedom map associated with the ith coordinate map element in the geometry.

Parameters

[in]

i

Index of the requested degree-of-freedom map. The degree-of-freedom map corresponds to the geometry element cmaps()[i].

Returns

A dofmap array, with shape (num_cells, dofs_per_cell).

index_map()

template<std::floating_point T>

std::shared_ptr< const common::IndexMap > index_map ( ) const

inline

Index map for the geometry 'degrees-of-freedom'.

Returns

Index map for the geometry dofs.

x() [1/2]

template<std::floating_point T>

std::span< value_type > x ( )

inline

Access geometry degrees-of-freedom data (non-const version).

Returns

The flattened row-major geometry data, where the shape is (num_points, 3).

x() [2/2]

template<std::floating_point T>

std::span< const value_type > x ( ) const

inline

Access geometry degrees-of-freedom data (const version).

Returns

The flattened row-major geometry data, where the shape is (num_points, 3).

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

• /__w/dolfinx/dolfinx/cpp/dolfinx/io/vtk_utils.h
• /__w/dolfinx/dolfinx/cpp/dolfinx/mesh/Geometry.h