/usr/include/CGAL/Triangulation_utils_3.h is in libcgal-dev 4.2-5ubuntu1.
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 | // Copyright (c) 1999 INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
// You can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
// Author(s) : Monique Teillaud <Monique.Teillaud@sophia.inria.fr>
#ifndef CGAL_TRIANGULATION_UTILS_3_H
#define CGAL_TRIANGULATION_UTILS_3_H
#include <CGAL/basic.h>
#include <CGAL/triangulation_assertions.h>
#include <CGAL/Triangulation_utils_2.h>
namespace CGAL {
// We use the following template class in order to avoid having a static data
// member of a non-template class which would require src/Triangulation_3.C .
template < class T = void >
struct Triangulation_utils_base_3
{
static const char tab_next_around_edge[4][4];
static const int tab_vertex_triple_index[4][3];
};
template < class T >
const char Triangulation_utils_base_3<T>::tab_next_around_edge[4][4] = {
{5, 2, 3, 1},
{3, 5, 0, 2},
{1, 3, 5, 0},
{2, 0, 1, 5} };
template < class T >
const int Triangulation_utils_base_3<T>::tab_vertex_triple_index[4][3] = {
{1, 3, 2},
{0, 2, 3},
{0, 3, 1},
{0, 1, 2}
};
// We derive from Triangulation_cw_ccw_2 because we still use cw() and ccw()
// in the 2D part of the code. Ideally, this should go away when we re-use
// T2D entirely.
struct Triangulation_utils_3
: public Triangulation_cw_ccw_2,
public Triangulation_utils_base_3<>
{
static int next_around_edge(const int i, const int j)
{
// index of the next cell when turning around the
// oriented edge vertex(i) vertex(j) in 3d
CGAL_triangulation_precondition( ( i >= 0 && i < 4 ) &&
( j >= 0 && j < 4 ) &&
( i != j ) );
return tab_next_around_edge[i][j];
}
static int vertex_triple_index(const int i, const int j)
{
// indexes of the jth vertex of the facet of a cell
// opposite to vertx i
CGAL_triangulation_precondition( ( i >= 0 && i < 4 ) &&
( j >= 0 && j < 3 ) );
return tab_vertex_triple_index[i][j];
}
};
} //namespace CGAL
#endif // CGAL_TRIANGULATION_UTILS_3_H
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