This file is indexed.

/usr/include/CGAL/Homogeneous/DirectionH3.h is in libcgal-dev 4.7-4.

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
// Copyright (c) 1999  
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel).  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 Lesser 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)     : Stefan Schirra
 
#ifndef CGAL_HOMOGENEOUS_DIRECTION_3_H
#define CGAL_HOMOGENEOUS_DIRECTION_3_H

#include <CGAL/kernel_config.h>
#include <CGAL/array.h>
#include <CGAL/Handle_for.h>
#include <CGAL/number_utils.h>
namespace CGAL {

template < class R_ >
class DirectionH3
{
   typedef typename R_::RT                   RT;
   typedef typename R_::FT                   FT;
   typedef typename R_::Point_3              Point_3;
   typedef typename R_::Vector_3             Vector_3;
   typedef typename R_::Segment_3            Segment_3;
   typedef typename R_::Line_3               Line_3;
   typedef typename R_::Ray_3                Ray_3;

    typedef cpp11::array<RT, 4>              Rep;
    typedef typename R_::template Handle<Rep>::type  Base;
 
    Base base;

public:

    typedef R_                 R;

  DirectionH3() {}

  //DirectionH3(const Point_3 & p )
    //: base(p) {}

  DirectionH3(const Vector_3 & v )
  { *this = v.direction(); }

  DirectionH3(const Line_3 & l )
  { *this = l.rep().direction(); }

  DirectionH3(const Ray_3 & r )
  { *this = r.direction(); }

  DirectionH3(const Segment_3 & s )
  { *this = s.direction(); }

  // the fourth argument is not documented.  Should go away ?
  DirectionH3(const RT& x, const RT& y,
              const RT& z, const RT& w = RT(1) )
    : base( w >= RT(0) ? CGAL::make_array(x, y, z, w)
                       : CGAL::make_array<RT>(-x, -y, -z, -w) ) {}

  bool  is_degenerate() const;

  bool  operator==( const DirectionH3<R>& d) const;
  bool  operator!=( const DirectionH3<R>& d) const;

  Vector_3    to_vector() const;
  Vector_3    vector() const { return to_vector(); }

  const RT & dx() const { return get_pointee_or_identity(base)[0]; }
  const RT & dy() const { return get_pointee_or_identity(base)[1]; }
  const RT & dz() const { return get_pointee_or_identity(base)[2]; }
  const RT & x()  const { return get_pointee_or_identity(base)[0]; }
  const RT & y()  const { return get_pointee_or_identity(base)[1]; }
  const RT & z()  const { return get_pointee_or_identity(base)[2]; }
  const RT & hx() const { return get_pointee_or_identity(base)[0]; }
  const RT & hy() const { return get_pointee_or_identity(base)[1]; }
  const RT & hz() const { return get_pointee_or_identity(base)[2]; }
};

template <class R >
CGAL_KERNEL_INLINE
bool
DirectionH3<R>::operator==( const DirectionH3<R>& d) const
{
  return ( ( hx()*d.hy() == hy()*d.hx() )
        &&( hx()*d.hz() == hz()*d.hx() )
        &&( hy()*d.hz() == hz()*d.hy() )
        &&( CGAL_NTS sign( hx() ) == CGAL_NTS sign( d.hx() ) )
        &&( CGAL_NTS sign( hy() ) == CGAL_NTS sign( d.hy() ) )
        &&( CGAL_NTS sign( hz() ) == CGAL_NTS sign( d.hz() ) ) );
}

template <class R >
inline
bool
DirectionH3<R>::operator!=( const DirectionH3<R>& d) const
{ return !operator==(d); }

template <class R >
CGAL_KERNEL_INLINE
bool
DirectionH3<R>::is_degenerate() const
{ return ((hx() == RT(0)) && (hy() == RT(0)) && (hz() == RT(0))); }

template <class R >
inline
typename DirectionH3<R>::Vector_3
DirectionH3<R>::to_vector() const
{ return Vector_3(dx(), dy(), dz(), RT(1)); }

template <class R>
CGAL_KERNEL_INLINE
DirectionH3<R>
cross_product( const DirectionH3<R>& d1,
               const DirectionH3<R>& d2)
{ return cross_product(d1.to_vector(),d2.to_vector()).direction(); }

} //namespace CGAL

#endif // CGAL_HOMOGENEOUS_DIRECTION_3_H