integration_domains.h File Reference

Functions for computing integration domains. More...

#include "Form.h"
#include <algorithm>
#include <array>
#include <cassert>
#include <cstdint>
#include <dolfinx/graph/AdjacencyList.h>
#include <dolfinx/mesh/Topology.h>
#include <ranges>
#include <span>
#include <vector>

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Namespaces
namespace	dolfinx
	Top-level namespace.
namespace	dolfinx::fem
	Finite element method functionality.

Functions
template<int num_cells>
std::array< std::int32_t, 2 *num_cells >	get_cell_facet_pairs (std::int32_t f, std::span< const std::int32_t > cells, const graph::AdjacencyList< std::int32_t > &c_to_f)
template<int num_cells>
std::array< std::int32_t, 2 *num_cells >	get_cell_entity_pairs (std::int32_t e, std::span< const std::int32_t > cells, const graph::AdjacencyList< std::int32_t > &c_to_e)
std::vector< std::int32_t >	compute_integration_domains (IntegralType integral_type, const mesh::Topology &topology, std::span< const std::int32_t > entities)
	Given an integral type and a set of entities, computes and return data for the entities that should be integrated over.

Detailed Description

Functions for computing integration domains.

Function Documentation

get_cell_entity_pairs()

template<int num_cells>

std::array< std::int32_t, 2 *num_cells > get_cell_entity_pairs	(	std::int32_t	e,
		std::span< const std::int32_t >	cells,
		const graph::AdjacencyList< std::int32_t > &	c_to_e )

Helper function to get an array of of (cell, local_entity) pairs corresponding to a given entity index.

Note

If the entity is connected to multiple cells, the first one is picked.

Parameters

[in]	e	entity index
[in]	cells	List of cells incident to the entity
[in]	c_to_e	Cell to entity connectivity

Returns

Vector of (cell, local_entity) pairs

get_cell_facet_pairs()

template<int num_cells>

std::array< std::int32_t, 2 *num_cells > get_cell_facet_pairs	(	std::int32_t	f,
		std::span< const std::int32_t >	cells,
		const graph::AdjacencyList< std::int32_t > &	c_to_f )

Helper function to get an array of (cell, local_facet) pairs corresponding to a given facet index.

Parameters

[in]	f	Facet index
[in]	cells	List of cells incident to the facet
[in]	c_to_f	Cell to facet connectivity

Returns

Vector of (cell, local_facet) pairs