DOLFINx
DOLFINx C++ interface
cell_types.h
1 // Copyright (C) 2019-2020 Garth N. Wells
2 //
3 // This file is part of DOLFINx (https://www.fenicsproject.org)
4 //
5 // SPDX-License-Identifier: LGPL-3.0-or-later
6 
7 #pragma once
8 
9 #include <array>
10 #include <basix/cell.h>
11 #include <dolfinx/graph/AdjacencyList.h>
12 #include <map>
13 #include <set>
14 #include <string>
15 #include <vector>
16 
17 namespace dolfinx::mesh
18 {
19 
21 enum class CellType : int
22 {
23  // NOTE: Simplex cells have index > 0, see mesh::is_simplex
24  point = 1,
25  interval = 2,
26  triangle = 3,
27  tetrahedron = 4,
28  quadrilateral = -4,
29  pyramid = -5,
30  prism = -6,
31  hexahedron = -8
32 };
33 
37 std::string to_string(CellType type);
38 
42 CellType to_type(const std::string& cell);
43 
45 CellType cell_entity_type(CellType type, int d, int index);
46 
53 CellType cell_facet_type(CellType type, int index);
54 
58 
61 graph::AdjacencyList<int> get_sub_entities(CellType type, int dim0, int dim1);
62 
64 int cell_dim(CellType type);
65 
70 int cell_num_entities(CellType type, int dim);
71 
75 bool is_simplex(CellType type);
76 
80 int num_cell_vertices(CellType type);
81 
82 // [dim, entity] -> closure{sub_dim, (sub_entities)}
83 
87 std::map<std::array<int, 2>, std::vector<std::set<int>>>
88 cell_entity_closure(CellType cell_type);
89 
91 basix::cell::type cell_type_to_basix_type(CellType celltype);
92 
94 CellType cell_type_from_basix_type(basix::cell::type celltype);
95 
96 } // namespace dolfinx::mesh
This class provides a static adjacency list data structure. It is commonly used to store directed gra...
Definition: AdjacencyList.h:26
Mesh data structures and algorithms on meshes.
Definition: DofMap.h:30
CellType cell_facet_type(CellType type, int index)
Return facet type of cell For simplex and hypercube cell types, this is independent of the facet inde...
Definition: cell_types.cpp:77
int cell_dim(CellType type)
Return topological dimension of cell type.
Definition: cell_types.cpp:157
CellType cell_entity_type(CellType type, int d, int index)
Return type of cell for entity of dimension d at given entity index.
Definition: cell_types.cpp:64
CellType cell_type_from_basix_type(basix::cell::type celltype)
Get a cell type from a Basix cell type.
Definition: cell_types.cpp:306
int num_cell_vertices(CellType type)
Number vertices for a cell type.
Definition: cell_types.cpp:218
graph::AdjacencyList< int > get_entity_vertices(CellType type, int dim)
Return list of entities, where entities(e, k) is the local vertex index for the kth vertex of entity ...
Definition: cell_types.cpp:105
basix::cell::type cell_type_to_basix_type(CellType celltype)
Convert a cell type to a Basix cell type.
Definition: cell_types.cpp:283
std::map< std::array< int, 2 >, std::vector< std::set< int > > > cell_entity_closure(CellType cell_type)
Closure entities for a cell, i.e., all lower-dimensional entities attached to a cell entity....
Definition: cell_types.cpp:224
int cell_num_entities(CellType type, int dim)
Number of entities of dimension dim.
Definition: cell_types.cpp:182
CellType
Cell type identifier.
Definition: cell_types.h:22
bool is_simplex(CellType type)
Check if cell is a simplex.
Definition: cell_types.cpp:216
std::string to_string(CellType type)
Get the cell string type for a cell type.
Definition: cell_types.cpp:17
CellType to_type(const std::string &cell)
Get the cell type from a cell string.
Definition: cell_types.cpp:42
graph::AdjacencyList< int > get_sub_entities(CellType type, int dim0, int dim1)
Get entities of dimension dim1 and that make up entities of dimension dim0.
Definition: cell_types.cpp:112