/usr/include/CGAL/Vector_2.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.
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// 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) : Andreas Fabri, Stefan Schirra
#ifndef CGAL_VECTOR_2_H
#define CGAL_VECTOR_2_H
#include <CGAL/Origin.h>
#include <CGAL/Kernel/mpl.h>
#include <CGAL/assertions.h>
#include <boost/type_traits/is_same.hpp>
#include <CGAL/Kernel/Return_base_tag.h>
#include <CGAL/representation_tags.h>
#include <CGAL/Dimension.h>
namespace CGAL {
template <class R_>
class Vector_2 : public R_::Kernel_base::Vector_2
{
typedef typename R_::RT RT;
typedef typename R_::FT FT;
typedef typename R_::Segment_2 Segment_2;
typedef typename R_::Ray_2 Ray_2;
typedef typename R_::Line_2 Line_2;
typedef typename R_::Point_2 Point_2;
typedef typename R_::Direction_2 Direction_2;
typedef typename R_::Aff_transformation_2 Aff_transformation_2;
typedef typename R_::Kernel_base::Vector_2 RVector_2;
typedef Vector_2 Self;
CGAL_static_assertion((boost::is_same<Self, typename R_::Vector_2>::value));
public:
typedef Dimension_tag<2> Ambient_dimension;
typedef Dimension_tag<0> Feature_dimension;
typedef RVector_2 Rep;
typedef typename R_::Cartesian_const_iterator_2 Cartesian_const_iterator;
const Rep& rep() const
{
return *this;
}
Rep& rep()
{
return *this;
}
typedef R_ R;
Vector_2() {}
Vector_2(const RVector_2& v)
: RVector_2(v) {}
Vector_2(const Point_2& a, const Point_2& b)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), a, b)) {}
explicit Vector_2(const Segment_2 &s)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), s)) {}
explicit Vector_2(const Ray_2 &r)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), r)) {}
explicit Vector_2(const Line_2 &l)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), l)) {}
Vector_2(const Null_vector &v)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), v)) {}
template < typename T1, typename T2 >
Vector_2(const T1 &x, const T2 &y)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), x,y)) {}
Vector_2(const RT &x, const RT &y, const RT &w)
: RVector_2(typename R::Construct_vector_2()(Return_base_tag(), x,y,w)) {}
typename cpp11::result_of<typename R::Compute_x_2(Vector_2)>::type
x() const
{
return R().compute_x_2_object()(*this);
}
typename cpp11::result_of<typename R::Compute_y_2(Vector_2)>::type
y() const
{
return R().compute_y_2_object()(*this);
}
typename cpp11::result_of<typename R::Compute_y_2(Vector_2)>::type
cartesian(int i) const
{
CGAL_kernel_precondition( (i == 0) || (i == 1) );
return (i==0) ? x() : y();
}
typename cpp11::result_of<typename R::Compute_x_2(Vector_2)>::type
operator[](int i) const
{
return cartesian(i);
}
Cartesian_const_iterator cartesian_begin() const
{
return typename R::Construct_cartesian_const_iterator_2()(*this);
}
Cartesian_const_iterator cartesian_end() const
{
return typename R::Construct_cartesian_const_iterator_2()(*this,2);
}
typename cpp11::result_of<typename R::Compute_hx_2(Vector_2)>::type
hx() const
{
return R().compute_hx_2_object()(*this);
}
typename cpp11::result_of<typename R::Compute_hy_2(Vector_2)>::type
hy() const
{
return R().compute_hy_2_object()(*this);
}
typename cpp11::result_of<typename R::Compute_hw_2(Vector_2)>::type
hw() const
{
return R().compute_hw_2_object()(*this);
}
typename cpp11::result_of<typename R::Compute_hx_2(Vector_2)>::type
homogeneous(int i) const
{
CGAL_kernel_precondition( (i >= 0) || (i <= 2) );
return (i==0) ? hx() : (i==1)? hy() : hw();
}
int dimension() const
{
return 2;
}
Vector_2 operator-() const
{
return R().construct_opposite_vector_2_object()(*this);
}
Vector_2 operator-(const Vector_2& v) const
{
return R().construct_difference_of_vectors_2_object()(*this,v);
}
Vector_2 operator+(const Vector_2& v) const
{
return R().construct_sum_of_vectors_2_object()(*this,v);
}
Vector_2 operator/(const RT& c) const
{
return R().construct_divided_vector_2_object()(*this,c);
}
Vector_2 operator/(const typename First_if_different<FT,RT>::Type & c) const
{
return R().construct_divided_vector_2_object()(*this,c);
}
FT squared_length() const
{
return R().compute_squared_length_2_object()(*this);
}
Direction_2 direction() const
{
return R().construct_direction_2_object()(*this);
}
Vector_2 perpendicular(const Orientation &o) const
{
return R().construct_perpendicular_vector_2_object()(*this,o);
}
Vector_2 transform(const Aff_transformation_2 &t) const
{
return t.transform(*this);
}
};
template < class R >
inline
bool
operator==(const Vector_2<R> &v, const Null_vector &n)
{
return R().equal_2_object()(v, n);
}
template < class R >
inline
bool
operator==(const Null_vector &n, const Vector_2<R> &v)
{
return v == n;
}
template < class R >
inline
bool
operator!=(const Vector_2<R> &v, const Null_vector &n)
{
return !(v == n);
}
template < class R >
inline
bool
operator!=(const Null_vector &n, const Vector_2<R> &v)
{
return !(v == n);
}
template <class R >
std::ostream&
insert(std::ostream& os, const Vector_2<R>& v, const Cartesian_tag&)
{
switch(os.iword(IO::mode)) {
case IO::ASCII :
return os << v.x() << ' ' << v.y();
case IO::BINARY :
write(os, v.x());
write(os, v.y());
return os;
default:
return os << "VectorC2(" << v.x() << ", " << v.y() << ')';
}
}
template <class R >
std::ostream&
insert(std::ostream& os, const Vector_2<R>& v, const Homogeneous_tag&)
{
switch(os.iword(IO::mode))
{
case IO::ASCII :
return os << v.hx() << ' ' << v.hy() << ' ' << v.hw();
case IO::BINARY :
write(os, v.hx());
write(os, v.hy());
write(os, v.hw());
return os;
default:
return os << "VectorH2(" << v.hx() << ", "
<< v.hy() << ", "
<< v.hw() << ')';
}
}
template < class R >
std::ostream&
operator<<(std::ostream& os, const Vector_2<R>& v)
{
return insert(os, v, typename R::Kernel_tag() );
}
template <class R >
std::istream&
extract(std::istream& is, Vector_2<R>& v, const Cartesian_tag&)
{
typename R::FT x, y;
switch(is.iword(IO::mode)) {
case IO::ASCII :
is >> x >> y;
break;
case IO::BINARY :
read(is, x);
read(is, y);
break;
default:
std::cerr << "" << std::endl;
std::cerr << "Stream must be in ascii or binary mode" << std::endl;
break;
}
if (is)
v = Vector_2<R>(x, y);
return is;
}
template <class R >
std::istream&
extract(std::istream& is, Vector_2<R>& v, const Homogeneous_tag&)
{
typename R::RT hx, hy, hw;
switch(is.iword(IO::mode))
{
case IO::ASCII :
is >> hx >> hy >> hw;
break;
case IO::BINARY :
read(is, hx);
read(is, hy);
read(is, hw);
break;
default:
std::cerr << "" << std::endl;
std::cerr << "Stream must be in ascii or binary mode" << std::endl;
break;
}
v = Vector_2<R>(hx, hy, hw);
return is;
}
template < class R >
std::istream&
operator>>(std::istream& is, Vector_2<R>& v)
{
return extract(is, v, typename R::Kernel_tag() );
}
} //namespace CGAL
#endif // CGAL_VECTOR_2_H
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