dolfinx::mesh::TopologyComputation Namespace Reference

This class implements a set of basic algorithms that automate the computation of mesh entities and connectivity. More...

Functions
std::tuple< std::shared_ptr< graph::AdjacencyList< std::int32_t > >, std::shared_ptr< graph::AdjacencyList< std::int32_t > >, std::shared_ptr< common::IndexMap > >	compute_entities (MPI_Comm comm, const Topology &topology, int dim)
	Compute mesh entities of given topological dimension by computing entity-to-vertex connectivity (dim, 0), and cell-to-entity connectivity (tdim, dim) More...
std::array< std::shared_ptr< graph::AdjacencyList< std::int32_t > >, 2 >	compute_connectivity (const Topology &topology, int d0, int d1)
	Compute connectivity (d0 -> d1) for given pair of topological dimensions. More...

Detailed Description

This class implements a set of basic algorithms that automate the computation of mesh entities and connectivity.

Function Documentation

compute_connectivity()

std::array< std::shared_ptr< graph::AdjacencyList< std::int32_t > >, 2 > dolfinx::mesh::TopologyComputation::compute_connectivity	(	const Topology &	topology,
		int	d0,
		int	d1
	)

Compute connectivity (d0 -> d1) for given pair of topological dimensions.

Parameters

[in]	topology	The topology
[in]	d0	The dimension of the nodes in the adjacency list
[in]	d1	The dimension of the edges in the adjacency list

Returns

The connectivities [(d0, d1), (d1, d0)] if they are computed. If (d0, d1) already exists then a nullptr is returned. If (d0, d1) is computed and the computation of (d1, d0) was required as part of computing (d0, d1), the (d1, d0) is returned as the second entry. The second entry is otherwise nullptr.

compute_entities()

std::tuple< std::shared_ptr< graph::AdjacencyList< std::int32_t > >, std::shared_ptr< graph::AdjacencyList< std::int32_t > >, std::shared_ptr< common::IndexMap > > dolfinx::mesh::TopologyComputation::compute_entities	(	MPI_Comm	comm,
		const Topology &	topology,
		int	dim
	)

Compute mesh entities of given topological dimension by computing entity-to-vertex connectivity (dim, 0), and cell-to-entity connectivity (tdim, dim)

Parameters

[in]	comm	MPI Communicator
[in]	topology	Mesh topology
[in]	dim	The dimension of the entities to create

Returns

Tuple of (cell-entity connectivity, entity-vertex connectivity, index map). If the entities already exist, then {nullptr, nullptr, nullptr} is returned.