/usr/include/dolfin/mesh/MeshQuality.h is in libdolfin-dev 2016.2.0-2.
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 | // Copyright (C) 2013 Garth N. Wells
//
// 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/>.
//
// First added: 2013-10-07
// Last changed:
#ifndef __MESH_QUALITY_H
#define __MESH_QUALITY_H
#include <string>
#include <utility>
#include <vector>
#include <boost/multi_array.hpp>
#include <memory>
#include "Cell.h"
namespace dolfin
{
class Mesh;
/// The class provides functions to quantify mesh quality
class MeshQuality
{
public:
/// Compute the radius ratio for all cells.
///
/// *Returns*
/// CellFunction<double>
/// The cell radius ratio radius ratio geometric_dimension *
/// * inradius / circumradius (geometric_dimension
/// is normalization factor). It has range zero to one.
/// Zero indicates a degenerate element.
///
/// *Example*
/// .. note::
///
/// std::shared_ptr<Mesh> mesh(new UnitCubeMesh(4, 4, 4));
/// CellFunction<double> = MeshQuality::radius_ratio(mesh);
static CellFunction<double>
radius_ratios(std::shared_ptr<const Mesh> mesh);
/// Compute the minimum and maximum radius ratio of cells
/// (across all processes)
///
/// *Returns*
/// std::pair<double, double>
/// The [minimum, maximum] cell radii ratio (geometric_dimension *
/// * inradius / circumradius, geometric_dimension
/// is normalization factor). It has range zero to one.
/// Zero indicates a degenerate element.
///
/// *Example*
/// .. note::
///
/// Mesh UnitCubeMesh(4, 4, 4);
/// std::pair<double, double> ratios
/// = MeshQuality::radius_ratio_min_max(mesh);
/// double min_ratio = ratios.first;
/// double max_ratio = ratios.second;
static std::pair<double, double> radius_ratio_min_max(const Mesh& mesh);
/// Create (ratio, number of cells) data for creating a histogram
/// of cell quality
static std::pair<std::vector<double>, std::vector<double> >
radius_ratio_histogram_data(const Mesh& mesh,
std::size_t num_bins = 50);
/// Create Matplotlib string to plot cell quality histogram
static std::string
radius_ratio_matplotlib_histogram(const Mesh& mesh,
std::size_t num_intervals = 50);
/// Get internal dihedral angles of a tetrahedral cell
static void dihedral_angles(const Cell& cell, std::vector<double>& dh_angle);
/// Get internal minimum and maximum dihedral angles of a 3D mesh
static std::pair<double, double>
dihedral_angles_min_max(const Mesh& mesh);
/// Create (dihedral angles, number of cells) data for creating a histogram
/// of dihedral
static std::pair<std::vector<double>, std::vector<double> >
dihedral_angles_histogram_data(const Mesh& mesh,
std::size_t num_bins = 100);
/// Create Matplotlib string to plot dihedral angles quality histogram
static std::string
dihedral_angles_matplotlib_histogram(const Mesh& mesh,
std::size_t num_intervals = 100);
};
}
#endif
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