/usr/include/dolfin/geometry/GeometryPredicates.h is in libdolfin-dev 2017.2.0.post0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// 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: 2016-11-21
// Last changed: 2017-09-22
#ifndef __GEOMETRY_PREDICATES_H
#define __GEOMETRY_PREDICATES_H
#include <vector>
#include <dolfin/log/LogStream.h>
#include "Point.h"
namespace dolfin
{
/// This class implements geometric predicates, i.e. function that
/// return either true or false.
class GeometryPredicates
{
public:
/// Check whether simplex is degenerate
static bool is_degenerate(const std::vector<Point>& simplex,
std::size_t gdim);
/// Check whether simplex is degenerate (2D version)
static bool is_degenerate_2d(const std::vector<Point>& simplex);
/// Check whether simplex is degenerate (3D version)
static bool is_degenerate_3d(const std::vector<Point>& simplex);
/// Check whether simplex is finite (not Inf or NaN)
static bool is_finite(const std::vector<Point>& simplex);
/// Check whether simplex is finite (not Inf or NaN)
static bool is_finite(const std::vector<double>& simplex);
/// Check whether the convex hull is degenerate
static bool convex_hull_is_degenerate(const std::vector<Point>& p,
std::size_t gdim);
private:
// Implementations of is_degenerate
static bool _is_degenerate_2d(const std::vector<Point>& simplex);
static bool _is_degenerate_3d(const std::vector<Point>& simplex);
};
}
#endif
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