mirror of https://github.com/CGAL/cgal
324 lines
7.8 KiB
C++
324 lines
7.8 KiB
C++
// ======================================================================
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//
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// Copyright (c) 2000 The CGAL Consortium
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//
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// This software and related documentation is part of an INTERNAL release
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// of the Computational Geometry Algorithms Library (CGAL). It is not
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// intended for general use.
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//
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// ----------------------------------------------------------------------
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//
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// release :
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// release_date :
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//
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// file : include/CGAL/Cartesian/Vector_2.h
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// revision : $Revision$
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// revision_date : $Date$
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// author(s) : Andreas Fabri, Herve Bronnimann
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// coordinator : INRIA Sophia-Antipolis (Mariette.Yvinec@sophia.inria.fr)
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//
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// ======================================================================
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#ifndef CGAL_CARTESIAN_VECTOR_2_H
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#define CGAL_CARTESIAN_VECTOR_2_H
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#include <CGAL/Cartesian/redefine_names_2.h>
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CGAL_BEGIN_NAMESPACE
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template < class R_ >
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class VectorC2 CGAL_ADVANCED_KERNEL_PARTIAL_SPEC
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: public R_::Vector_handle_2
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{
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public:
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typedef R_ R;
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typedef typename R::FT FT;
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typedef typename R::RT RT;
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typedef typename R::Vector_handle_2 Vector_handle_2_;
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typedef typename Vector_handle_2_::element_type Vector_ref_2;
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#ifndef CGAL_CFG_NO_ADVANCED_KERNEL
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typedef VectorC2<R,Cartesian_tag> Self;
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typedef typename R::Point_2 Point_2;
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typedef typename R::Direction_2 Direction_2;
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typedef typename R::Line_2 Line_2;
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typedef typename R::Ray_2 Ray_2;
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typedef typename R::Triangle_2 Triangle_2;
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typedef typename R::Segment_2 Segment_2;
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typedef typename R::Iso_rectangle_2 Iso_rectangle_2;
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typedef typename R::Aff_transformation_2 Aff_transformation_2;
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typedef typename R::Circle_2 Circle_2;
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#else
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typedef VectorC2<R> Self;
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typedef typename R::Point_2_base Point_2;
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typedef typename R::Direction_2_base Direction_2;
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typedef typename R::Line_2_base Line_2;
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typedef typename R::Ray_2_base Ray_2;
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typedef typename R::Triangle_2_base Triangle_2;
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typedef typename R::Segment_2_base Segment_2;
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typedef typename R::Iso_rectangle_2_base Iso_rectangle_2;
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typedef typename R::Aff_transformation_2_base Aff_transformation_2;
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typedef typename R::Circle_2_base Circle_2;
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#endif
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VectorC2()
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: Vector_handle_2_(Vector_ref_2()) {}
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VectorC2(const Null_vector &)
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: Vector_handle_2_(Vector_ref_2(FT(0), FT(0))) {}
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VectorC2(const Point_2 &p)
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: Vector_handle_2_(p) {}
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VectorC2(const Point_2 &a, const Point_2 &b)
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: Vector_handle_2_(b-a) {}
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VectorC2(const Direction_2 &d)
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: Vector_handle_2_(d) {}
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VectorC2(const FT &x, const FT &y)
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: Vector_handle_2_(Vector_ref_2(x, y)) {}
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VectorC2(const FT &hx, const FT &hy, const FT &hw)
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{
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if (hw != FT(1))
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initialize_with(Vector_ref_2(hx/hw, hy/hw));
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else
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initialize_with(Vector_ref_2(hx, hy));
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}
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bool operator==(const Self &v) const;
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bool operator!=(const Self &v) const;
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bool operator==(const Null_vector &) const;
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bool operator!=(const Null_vector &p) const;
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const FT & x() const
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{
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return Ptr()->e0;
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}
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const FT & y() const
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{
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return Ptr()->e1;
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}
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const FT & hx() const
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{
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return x();
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}
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const FT & hy() const
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{
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return y();
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}
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FT hw() const
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{
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return FT(1);
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}
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const FT & cartesian(int i) const;
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const FT & operator[](int i) const;
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FT homogeneous(int i) const;
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int dimension() const
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{
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return 2;
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}
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Self operator+(const Self &w) const;
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Self operator-(const Self &w) const;
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Self operator-() const;
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FT operator*(const Self &w) const;
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FT squared_length() const;
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Self operator/(const FT &c) const;
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Direction_2 direction() const;
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Self perpendicular(const Orientation &o) const;
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Self transform(const Aff_transformation_2 &t) const
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{
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return t.transform(*this);
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}
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};
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#ifdef CGAL_CFG_TYPENAME_BUG
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#define typename
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#endif
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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VectorC2<R CGAL_CTAG>::operator==(const VectorC2<R CGAL_CTAG> &v) const
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{
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if (identical(v))
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return true;
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return x() == v.x() && y() == v.y();
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}
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template < class R >
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inline
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bool
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VectorC2<R CGAL_CTAG>::operator!=(const VectorC2<R CGAL_CTAG> &v) const
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{
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return !(*this == v);
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}
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template < class R >
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inline
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bool
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VectorC2<R CGAL_CTAG>::operator==(const Null_vector &) const
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{
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return CGAL_NTS is_zero(x()) && CGAL_NTS is_zero(y());
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}
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template < class R >
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inline
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bool
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VectorC2<R CGAL_CTAG>::operator!=(const Null_vector &v) const
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{
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return !(*this == v);
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}
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template < class R >
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CGAL_KERNEL_INLINE
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const typename VectorC2<R CGAL_CTAG>::FT &
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VectorC2<R CGAL_CTAG>::cartesian(int i) const
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{
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CGAL_kernel_precondition( (i == 0) || (i == 1) );
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return (i == 0) ? x() : y();
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}
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template < class R >
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inline
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const typename VectorC2<R CGAL_CTAG>::FT &
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VectorC2<R CGAL_CTAG>::operator[](int i) const
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{
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return cartesian(i);
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename VectorC2<R CGAL_CTAG>::FT
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VectorC2<R CGAL_CTAG>::homogeneous(int i) const
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{
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return (i == 2) ? FT(1) : cartesian(i);
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}
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template < class R >
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CGAL_KERNEL_INLINE
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VectorC2<R CGAL_CTAG>
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VectorC2<R CGAL_CTAG>::operator+(const VectorC2<R CGAL_CTAG> &w) const
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{
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return VectorC2<R CGAL_CTAG>(x() + w.x(), y() + w.y());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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VectorC2<R CGAL_CTAG>
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VectorC2<R CGAL_CTAG>::operator-(const VectorC2<R CGAL_CTAG> &w) const
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{
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return VectorC2<R CGAL_CTAG>(x() - w.x(), y() - w.y());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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VectorC2<R CGAL_CTAG>
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VectorC2<R CGAL_CTAG>::operator-() const
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{
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return VectorC2<R CGAL_CTAG>(-x(), -y());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename VectorC2<R CGAL_CTAG>::FT
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VectorC2<R CGAL_CTAG>::operator*(const VectorC2<R CGAL_CTAG> &w) const
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{
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return x() * w.x() + y() * w.y();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename VectorC2<R CGAL_CTAG>::FT
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VectorC2<R CGAL_CTAG>::squared_length() const
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{
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return CGAL_NTS square(x()) + CGAL_NTS square(y());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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VectorC2<R CGAL_CTAG>
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VectorC2<R CGAL_CTAG>::
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operator/(const typename VectorC2<R CGAL_CTAG>::FT &c) const
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{
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return VectorC2<R CGAL_CTAG>( x()/c, y()/c);
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}
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template < class R >
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inline
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typename VectorC2<R CGAL_CTAG>::Direction_2
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VectorC2<R CGAL_CTAG>::direction() const
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{
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return Direction_2(*this);
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}
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template < class R >
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CGAL_KERNEL_MEDIUM_INLINE
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VectorC2<R CGAL_CTAG>
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VectorC2<R CGAL_CTAG>::perpendicular(const Orientation &o) const
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{
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CGAL_kernel_precondition( o != COLLINEAR );
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if (o == COUNTERCLOCKWISE)
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return VectorC2<R CGAL_CTAG>(-y(), x());
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else
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return VectorC2<R CGAL_CTAG>(y(), -x());
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}
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#ifndef CGAL_NO_OSTREAM_INSERT_VECTORC2
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template < class R >
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std::ostream &
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operator<<(std::ostream &os, const VectorC2<R CGAL_CTAG> &v)
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{
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switch(os.iword(IO::mode)) {
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case IO::ASCII :
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return os << v.x() << ' ' << v.y();
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case IO::BINARY :
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write(os, v.x());
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write(os, v.y());
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return os;
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default:
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return os << "VectorC2(" << v.x() << ", " << v.y() << ')';
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}
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}
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#endif // CGAL_NO_OSTREAM_INSERT_VECTORC2
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#ifndef CGAL_NO_ISTREAM_EXTRACT_VECTORC2
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template < class R >
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std::istream &
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operator>>(std::istream &is, VectorC2<R CGAL_CTAG> &p)
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{
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typename VectorC2<R CGAL_CTAG>::FT x, y;
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switch(is.iword(IO::mode)) {
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case IO::ASCII :
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is >> x >> y;
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break;
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case IO::BINARY :
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read(is, x);
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read(is, y);
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break;
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default:
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std::cerr << "" << std::endl;
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std::cerr << "Stream must be in ascii or binary mode" << std::endl;
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break;
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}
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if (is)
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p = VectorC2<R CGAL_CTAG>(x, y);
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return is;
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}
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#endif // CGAL_NO_ISTREAM_EXTRACT_VECTORC2
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#ifdef CGAL_CFG_TYPENAME_BUG
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#undef typename
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#endif
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CGAL_END_NAMESPACE
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#endif // CGAL_CARTESIAN_VECTOR_2_H
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