mirror of https://github.com/CGAL/cgal
310 lines
7.6 KiB
C++
310 lines
7.6 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/Segment_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_SEGMENT_2_H
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#define CGAL_CARTESIAN_SEGMENT_2_H
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#include <CGAL/Cartesian/redefine_names_2.h>
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#include <CGAL/Cartesian/predicates_on_points_2.h>
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CGAL_BEGIN_NAMESPACE
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template < class R_ >
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class SegmentC2 CGAL_ADVANCED_KERNEL_PARTIAL_SPEC
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: public R_::Segment_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::Segment_handle_2 Segment_handle_2_;
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typedef typename Segment_handle_2_::element_type Segment_ref_2;
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#ifndef CGAL_CFG_NO_ADVANCED_KERNEL
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typedef SegmentC2<R,Cartesian_tag> Self;
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typedef typename R::Point_2 Point_2;
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typedef typename R::Vector_2 Vector_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::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 SegmentC2<R> Self;
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typedef typename R::Point_2_base Point_2;
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typedef typename R::Vector_2_base Vector_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::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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SegmentC2()
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: Segment_handle_2_(Segment_ref_2()) {}
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SegmentC2(const Point_2 &sp, const Point_2 &ep)
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: Segment_handle_2_(Segment_ref_2(sp, ep)) {}
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bool is_horizontal() const;
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bool is_vertical() const;
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bool has_on(const Point_2 &p) const;
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bool collinear_has_on(const Point_2 &p) const;
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bool operator==(const Self &s) const;
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bool operator!=(const Self &s) const;
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const Point_2 & source() const
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{
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return Ptr()->e0;
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}
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const Point_2 & target() const
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{
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return Ptr()->e1;
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}
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const Point_2 & start() const;
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const Point_2 & end() const;
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const Point_2 & min() const;
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const Point_2 & max() const;
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const Point_2 & vertex(int i) const;
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const Point_2 & point(int i) const;
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const Point_2 & operator[](int i) const;
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FT squared_length() const;
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Direction_2 direction() const;
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Line_2 supporting_line() const;
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Self opposite() const;
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Self transform(const Aff_transformation_2 &t) const
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{
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return Self(t.transform(source()), t.transform(target()));
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}
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bool is_degenerate() const;
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Bbox_2 bbox() const;
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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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inline
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bool
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SegmentC2<R CGAL_CTAG>::operator==(const SegmentC2<R CGAL_CTAG> &s) const
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{
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if (identical(s))
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return true;
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return source() == s.source() && target() == s.target();
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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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SegmentC2<R CGAL_CTAG>::operator!=(const SegmentC2<R CGAL_CTAG> &s) const
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{
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return !(*this == s);
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}
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template < class R >
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inline
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::start() const
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{
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return source();
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}
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template < class R >
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inline
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::end() const
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{
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return target();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::min() const
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{
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return lexicographically_xy_smaller(source(),target()) ? source() : target();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::max() const
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{
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return lexicographically_xy_smaller(source(),target()) ? target() : source();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::vertex(int i) const
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{
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return (i%2 == 0) ? source() : target();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::point(int i) const
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{
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return (i%2 == 0) ? source() : target();
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}
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template < class R >
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inline
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const typename SegmentC2<R CGAL_CTAG>::Point_2 &
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SegmentC2<R CGAL_CTAG>::operator[](int i) const
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{
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return vertex(i);
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename SegmentC2<R CGAL_CTAG>::FT
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SegmentC2<R CGAL_CTAG>::squared_length() const
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{
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return squared_distance(source(), target());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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typename SegmentC2<R CGAL_CTAG>::Direction_2
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SegmentC2<R CGAL_CTAG>::direction() const
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{
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return Direction_2( target() - source() );
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}
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template < class R >
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inline
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typename SegmentC2<R CGAL_CTAG>::Line_2
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SegmentC2<R CGAL_CTAG>::supporting_line() const
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{
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return Line_2(*this);
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}
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template < class R >
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inline
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SegmentC2<R CGAL_CTAG>
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SegmentC2<R CGAL_CTAG>::opposite() const
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{
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return SegmentC2<R CGAL_CTAG>(target(), source());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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Bbox_2
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SegmentC2<R CGAL_CTAG>::bbox() const
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{
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return source().bbox() + target().bbox();
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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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SegmentC2<R CGAL_CTAG>::is_degenerate() const
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{
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return source() == target();
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}
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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SegmentC2<R CGAL_CTAG>::is_horizontal() const
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{
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return y_equal(source(), target());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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SegmentC2<R CGAL_CTAG>::is_vertical() const
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{
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return x_equal(source(), target());
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}
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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SegmentC2<R CGAL_CTAG>::
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has_on(const typename SegmentC2<R CGAL_CTAG>::Point_2 &p) const
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{
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return are_ordered_along_line(source(), p, target());
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}
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template < class R >
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CGAL_KERNEL_MEDIUM_INLINE
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bool
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SegmentC2<R CGAL_CTAG>::
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collinear_has_on(const typename SegmentC2<R CGAL_CTAG>::Point_2 &p) const
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{
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return collinear_are_ordered_along_line(source(), p, target());
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}
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#ifndef CGAL_NO_OSTREAM_INSERT_SEGMENTC2
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template < class R >
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std::ostream &
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operator<<(std::ostream &os, const SegmentC2<R CGAL_CTAG> &s)
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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 << s.source() << ' ' << s.target();
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case IO::BINARY :
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return os << s.source() << s.target();
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default:
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return os << "SegmentC2(" << s.source() << ", " << s.target() << ")";
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}
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}
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#endif // CGAL_NO_OSTREAM_INSERT_SEGMENTC2
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#ifndef CGAL_NO_ISTREAM_EXTRACT_SEGMENTC2
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template < class R >
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std::istream &
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operator>>(std::istream &is, SegmentC2<R CGAL_CTAG> &s)
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{
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typename SegmentC2<R CGAL_CTAG>::Point_2 p, q;
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is >> p >> q;
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if (is)
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s = SegmentC2<R CGAL_CTAG>(p, q);
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return is;
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}
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#endif // CGAL_NO_ISTREAM_EXTRACT_SEGMENTC2
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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_SEGMENT_2_H
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