MeshTopology.h

Note

The documentation on this page was automatically extracted from the DOLFIN C++ code and may need to be edited or expanded.

class MeshTopology

MeshTopology stores the topology of a mesh, consisting of mesh entities and connectivity (incidence relations for the mesh entities). Note that the mesh entities don’t need to be stored, only the number of entities and the connectivity. Any numbering scheme for the mesh entities is stored separately in a MeshFunction over the entities.

A mesh entity e may be identified globally as a pair e = (dim, i), where dim is the topological dimension and i is the index of the entity within that topological dimension.

MeshTopology()

Create empty mesh topology

MeshTopology(const MeshTopology &topology)

Copy constructor

MeshTopology &operator=(const MeshTopology &topology)

Assignment

std::size_t dim() const

Return topological dimension

std::size_t size(std::size_t dim) const

Return number of entities for given dimension

std::size_t size_global(std::size_t dim) const

Return global number of entities for given dimension

std::size_t ghost_offset(std::size_t dim) const

Return number of regular (non-ghost) entities or equivalently, the offset of where ghost entities begin

void clear()

Clear all data

void clear(std::size_t d0, std::size_t d1)

Clear data for given pair of topological dimensions

void init(std::size_t dim)

Initialize topology of given maximum dimension

void init(std::size_t dim, std::size_t local_size, std::size_t global_size)

Set number of local entities (local_size) and global entities (global_size) for given topological dimension dim

void init_global_indices(std::size_t dim, std::size_t size)

Initialize storage for global entity numbering for entities of dimension dim

void init_ghost(std::size_t dim, std::size_t index)

Initialise the offset index of ghost entities for this dimension

void set_global_index(std::size_t dim, std::size_t local_index, std::size_t global_index)

Set global index for entity of dimension dim and with local index

const std::vector<std::size_t> &global_indices(std::size_t d) const

Get local-to-global index map for entities of topological dimension d

bool have_global_indices(std::size_t dim) const

Check if global indices are available for entities of dimension dim

bool have_shared_entities(unsigned int dim) const

Check whether there are any shared entities calculated of dimension dim

std::map<std::int32_t, std::set<unsigned int>> &shared_entities(unsigned int dim)

Return map from shared entities (local index) to processes that share the entity

const std::map<std::int32_t, std::set<unsigned int>> &shared_entities(unsigned int dim) const

Return map from shared entities (local index) to process that share the entity (const version)

std::vector<unsigned int> &cell_owner()

Return mapping from local ghost cell index to owning process Since ghost cells are at the end of the range, this is just a vector over those cells

const std::vector<unsigned int> &cell_owner() const

Return mapping from local ghost cell index to owning process (const version) Since ghost cells are at the end of the range, this is just a vector over those cells

dolfin::MeshConnectivity &operator()(std::size_t d0, std::size_t d1)

Return connectivity for given pair of topological dimensions

const dolfin::MeshConnectivity &operator()(std::size_t d0, std::size_t d1) const

Return connectivity for given pair of topological dimensions

size_t hash() const

Return hash based on the hash of cell-vertex connectivity

std::string str(bool verbose) const

Return informal string representation (pretty-print)