/usr/include/dolfin/mesh/CellType.h is in libdolfin1.3-dev 1.3.0+dfsg-2.
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 | // Copyright (C) 2006-2009 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 Kristoffer Selim, 2008.
// Modified by Andre Massing, 2009-2010.
// Modified by Jan Blechta 2013
//
// First added: 2006-06-05
// Last changed: 2013-08-26
#ifndef __CELL_TYPE_H
#define __CELL_TYPE_H
#include <string>
#include <vector>
namespace dolfin
{
class Cell;
class MeshEditor;
class MeshEntity;
template <typename T> class MeshFunction;
class Point;
/// This class provides a common interface for different cell types.
/// Each cell type implements mesh functionality that is specific to
/// a certain type of cell.
class CellType
{
public:
/// Enum for different cell types
enum Type { point, interval, triangle, tetrahedron };
/// Constructor
CellType(Type cell_type, Type facet_type);
/// Destructor
virtual ~CellType();
/// Create cell type from type (factory function)
static CellType* create(Type type);
/// Create cell type from string (factory function)
static CellType* create(std::string type);
/// Convert from string to cell type
static Type string2type(std::string type);
/// Convert from cell type to string
static std::string type2string(Type type);
/// Return type of cell
Type cell_type() const { return _cell_type; }
/// Return type of cell for facets
Type facet_type() const { return _facet_type; }
/// Return topological dimension of cell
virtual std::size_t dim() const = 0;
/// Return number of entitites of given topological dimension
virtual std::size_t num_entities(std::size_t dim) const = 0;
/// Return number of vertices for entity of given topological dimension
virtual std::size_t num_vertices(std::size_t dim) const = 0;
/// Return orientation of the cell (assuming flat space)
virtual std::size_t orientation(const Cell& cell) const = 0;
/// Return orientation of the cell relative to given up direction
std::size_t orientation(const Cell& cell, const Point& up) const;
/// Create entities e of given topological dimension from vertices v
virtual void create_entities(std::vector<std::vector<std::size_t> >& e,
std::size_t dim, const unsigned int* v) const = 0;
/// Refine cell uniformly
virtual void refine_cell(Cell& cell, MeshEditor& editor,
std::size_t& current_cell) const = 0;
/// Compute (generalized) volume of mesh entity
virtual double volume(const MeshEntity& entity) const = 0;
/// Compute diameter of mesh entity
virtual double diameter(const MeshEntity& entity) const = 0;
/// Compute inradius of cell
virtual double inradius(const Cell& cell) const;
/// Compute dim*inradius/circumradius for given cell
virtual double radius_ratio(const Cell& cell) const;
/// Compute squared distance to given point
virtual double squared_distance(const Cell& cell, const Point& point) const = 0;
/// Compute component i of normal of given facet with respect to the cell
virtual double normal(const Cell& cell, std::size_t facet, std::size_t i) const = 0;
/// Compute of given facet with respect to the cell
virtual Point normal(const Cell& cell, std::size_t facet) const = 0;
/// Compute normal to given cell (viewed as embedded in 3D)
virtual Point cell_normal(const Cell& cell) const = 0;
/// Compute the area/length of given facet with respect to the cell
virtual double facet_area(const Cell& cell, std::size_t facet) const = 0;
// FIXME: The order() function should be reimplemented and use one common
// FIXME: implementation for all cell types, just as we have for ordered()
/// Order entities locally
virtual void order(Cell& cell,
const std::vector<std::size_t>& local_to_global_vertex_indices) const = 0;
/// Check if entities are ordered
bool ordered(const Cell& cell,
const std::vector<std::size_t>& local_to_global_vertex_indices) const;
/// Check whether given point collides with cell
virtual bool collides(const Cell& cell, const Point& point) const = 0;
/// Check whether given entity collides with cell
virtual bool collides(const Cell& cell, const MeshEntity& entity) const = 0;
/// Return description of cell type
virtual std::string description(bool plural) const = 0;
protected:
Type _cell_type;
Type _facet_type;
// Sort vertices based on global entity indices
static void sort_entities(std::size_t num_vertices,
unsigned int* vertices,
const std::vector<std::size_t>& local_to_global_vertex_indices);
private:
// Check if list of vertices is increasing
static bool increasing(std::size_t num_vertices, const unsigned int* vertices,
const std::vector<std::size_t>& local_to_global_vertex_indices);
// Check that <entity e0 with vertices v0> <= <entity e1 with vertices v1>
static bool increasing(std::size_t n0, const unsigned int* v0,
std::size_t n1, const unsigned int* v1,
std::size_t num_vertices, const unsigned int* vertices,
const std::vector<std::size_t>& local_to_global_vertex_indices);
};
}
#endif
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