/usr/include/dolfin/mesh/MeshEntity.h is in libdolfin-dev 1.4.0+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 | // Copyright (C) 2006-2011 Anders Logg
//
// This file is part of DOLFIN.
//
// DOLFIN is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// DOLFIN is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
//
// Modified by Andre Massing, 2009.
// Modified by Garth N. Wells, 2012.
//
// First added: 2006-05-11
// Last changed: 2013-06-23
#ifndef __MESH_ENTITY_H
#define __MESH_ENTITY_H
#include <cmath>
#include <iostream>
#include <dolfin/geometry/Point.h>
#include "Mesh.h"
namespace dolfin
{
//class Mesh;
class Point;
/// A MeshEntity represents a mesh entity associated with
/// a specific topological dimension of some _Mesh_.
class MeshEntity
{
public:
/// Default Constructor
MeshEntity() : _mesh(0), _dim(0), _local_index(0) {}
/// Constructor
///
/// *Arguments*
/// mesh (_Mesh_)
/// The mesh.
/// dim (std::size_t)
/// The topological dimension.
/// index (std::size_t)
/// The index.
MeshEntity(const Mesh& mesh, std::size_t dim, std::size_t index);
/// Destructor
virtual ~MeshEntity();
/// Initialize mesh entity with given data
///
/// *Arguments*
/// mesh (_Mesh_)
/// The mesh.
/// dim (std::size_t)
/// The topological dimension.
/// index (std::size_t)
/// The index.
void init(const Mesh& mesh, std::size_t dim, std::size_t index);
/// Comparision Operator
///
/// *Arguments*
/// another (_MeshEntity_)
/// Another mesh entity
///
/// *Returns*
/// bool
/// True if the two mesh entities are equal.
bool operator==(const MeshEntity& e) const
{
return (_mesh == e._mesh && _dim == e._dim
&& _local_index == e._local_index);
}
/// Comparision Operator
///
/// *Arguments*
/// another (MeshEntity)
/// Another mesh entity.
///
/// *Returns*
/// bool
/// True if the two mesh entities are NOT equal.
bool operator!=(const MeshEntity& e) const
{ return !operator==(e); }
/// Return mesh associated with mesh entity
///
/// *Returns*
/// _Mesh_
/// The mesh.
const Mesh& mesh() const
{ return *_mesh; }
/// Return topological dimension
///
/// *Returns*
/// std::size_t
/// The dimension.
std::size_t dim() const
{ return _dim; }
/// Return index of mesh entity
///
/// *Returns*
/// std::size_t
/// The index.
std::size_t index() const
{ return _local_index; }
/// Return global index of mesh entity
///
/// *Returns*
/// std::size_t
/// The global index. Set to
/// std::numerical_limits<std::size_t>::max() if global index
/// has not been computed
std::size_t global_index() const
{ return _mesh->topology().global_indices(_dim)[_local_index]; }
/// Return local number of incident mesh entities of given
/// topological dimension
///
/// *Arguments*
/// dim (std::size_t)
/// The topological dimension.
///
/// *Returns*
/// std::size_t
/// The number of local incident MeshEntity objects of given
/// dimension.
std::size_t num_entities(std::size_t dim) const
{ return _mesh->topology()(_dim, dim).size(_local_index); }
/// Return global number of incident mesh entities of given
/// topological dimension
///
/// *Arguments*
/// dim (std::size_t)
/// The topological dimension.
///
/// *Returns*
/// std::size_t
/// The number of global incident MeshEntity objects of given
/// dimension.
std::size_t num_global_entities(std::size_t dim) const
{ return _mesh->topology()(_dim, dim).size_global(_local_index); }
/// Return array of indices for incident mesh entitites of given
/// topological dimension
///
/// *Arguments*
/// dim (std::size_t)
/// The topological dimension.
///
/// *Returns*
/// std::size_t
/// The index for incident mesh entities of given dimension.
const unsigned int* entities(std::size_t dim) const
{ return _mesh->topology()(_dim, dim)(_local_index); }
/// Return unique mesh ID
///
/// *Returns*
/// std::size_t
/// The unique mesh ID.
std::size_t mesh_id() const
{ return _mesh->id(); }
/// Check if given entity is incident
///
/// *Arguments*
/// entity (_MeshEntity_)
/// The entity.
///
/// *Returns*
/// bool
/// True if the given entity is incident
bool incident(const MeshEntity& entity) const;
/// Compute local index of given incident entity (error if not
/// found)
///
/// *Arguments*
/// entity (_MeshEntity_)
/// The mesh entity.
///
/// *Returns*
/// std::size_t
/// The local index of given entity.
std::size_t index(const MeshEntity& entity) const;
/// Compute midpoint of cell
///
/// *Returns*
/// _Point_
/// The midpoint of the cell.
Point midpoint() const;
// Note: Not a subclass of Variable for efficiency!
/// Return informal string representation (pretty-print)
///
/// *Arguments*
/// verbose (bool)
/// Flag to turn on additional output.
///
/// *Returns*
/// std::string
/// An informal representation of the function space.
std::string str(bool verbose) const;
protected:
// Friends
friend class MeshEntityIterator;
template<typename T> friend class MeshEntityIteratorBase;
friend class SubsetIterator;
// The mesh
Mesh const * _mesh;
// Topological dimension
std::size_t _dim;
// Local index of entity within topological dimension
std::size_t _local_index;
};
}
#endif
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