mirror of https://github.com/CGAL/cgal
284 lines
6.1 KiB
C++
284 lines
6.1 KiB
C++
// ======================================================================
|
|
//
|
|
// Copyright (c) 2000 The CGAL Consortium
|
|
//
|
|
// This software and related documentation is part of an INTERNAL release
|
|
// of the Computational Geometry Algorithms Library (CGAL). It is not
|
|
// intended for general use.
|
|
//
|
|
// ----------------------------------------------------------------------
|
|
//
|
|
// release :
|
|
// release_date :
|
|
//
|
|
// file : include/CGAL/Cartesian/Segment_2.h
|
|
// revision : $Revision$
|
|
// revision_date : $Date$
|
|
// author(s) : Andreas Fabri, Herve Bronnimann
|
|
// coordinator : INRIA Sophia-Antipolis (Mariette.Yvinec@sophia.inria.fr)
|
|
//
|
|
// ======================================================================
|
|
|
|
#ifndef CGAL_CARTESIAN_SEGMENT_2_H
|
|
#define CGAL_CARTESIAN_SEGMENT_2_H
|
|
|
|
#include <CGAL/Twotuple.h>
|
|
#include <CGAL/Cartesian/predicates_on_points_2.h>
|
|
|
|
CGAL_BEGIN_NAMESPACE
|
|
|
|
template < class R_ >
|
|
class SegmentC2
|
|
: public R_::template Handle<Twotuple<typename R_::Point_2> >::type
|
|
{
|
|
CGAL_VC7_BUG_PROTECTED
|
|
typedef typename R_::FT FT;
|
|
typedef typename R_::Point_2 Point_2;
|
|
typedef typename R_::Direction_2 Direction_2;
|
|
typedef typename R_::Line_2 Line_2;
|
|
typedef typename R_::Segment_2 Segment_2;
|
|
typedef typename R_::Aff_transformation_2 Aff_transformation_2;
|
|
|
|
typedef Twotuple<Point_2> rep;
|
|
typedef typename R_::template Handle<rep>::type base;
|
|
|
|
public:
|
|
typedef R_ R;
|
|
|
|
SegmentC2()
|
|
: base(rep()) {}
|
|
|
|
SegmentC2(const Point_2 &sp, const Point_2 &ep)
|
|
: base(rep(sp, ep)) {}
|
|
|
|
bool is_horizontal() const;
|
|
bool is_vertical() const;
|
|
bool has_on(const Point_2 &p) const;
|
|
bool collinear_has_on(const Point_2 &p) const;
|
|
|
|
bool operator==(const SegmentC2 &s) const;
|
|
bool operator!=(const SegmentC2 &s) const;
|
|
|
|
const Point_2 & source() const
|
|
{
|
|
return Ptr()->e0;
|
|
}
|
|
const Point_2 & target() const
|
|
{
|
|
return Ptr()->e1;
|
|
}
|
|
|
|
const Point_2 & start() const;
|
|
const Point_2 & end() const;
|
|
|
|
const Point_2 & min() const;
|
|
const Point_2 & max() const;
|
|
const Point_2 & vertex(int i) const;
|
|
const Point_2 & point(int i) const;
|
|
const Point_2 & operator[](int i) const;
|
|
|
|
FT squared_length() const;
|
|
|
|
Direction_2 direction() const;
|
|
Line_2 supporting_line() const;
|
|
Segment_2 opposite() const;
|
|
Segment_2 transform(const Aff_transformation_2 &t) const
|
|
{
|
|
return SegmentC2<R>(t.transform(source()), t.transform(target()));
|
|
}
|
|
|
|
bool is_degenerate() const;
|
|
Bbox_2 bbox() const;
|
|
};
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
SegmentC2<R>::operator==(const SegmentC2<R> &s) const
|
|
{
|
|
if (identical(s))
|
|
return true;
|
|
return source() == s.source() && target() == s.target();
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
SegmentC2<R>::operator!=(const SegmentC2<R> &s) const
|
|
{
|
|
return !(*this == s);
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::start() const
|
|
{
|
|
return source();
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::end() const
|
|
{
|
|
return target();
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::min() const
|
|
{
|
|
return lexicographically_xy_smaller(source(),target()) ? source() : target();
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::max() const
|
|
{
|
|
return lexicographically_xy_smaller(source(),target()) ? target() : source();
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::vertex(int i) const
|
|
{
|
|
return (i%2 == 0) ? source() : target();
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::point(int i) const
|
|
{
|
|
return (i%2 == 0) ? source() : target();
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
const typename SegmentC2<R>::Point_2 &
|
|
SegmentC2<R>::operator[](int i) const
|
|
{
|
|
return vertex(i);
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
typename SegmentC2<R>::FT
|
|
SegmentC2<R>::squared_length() const
|
|
{
|
|
return squared_distance(source(), target());
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
typename SegmentC2<R>::Direction_2
|
|
SegmentC2<R>::direction() const
|
|
{
|
|
return Direction_2( target() - source() );
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
typename SegmentC2<R>::Line_2
|
|
SegmentC2<R>::supporting_line() const
|
|
{
|
|
return Line_2(*this);
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
typename SegmentC2<R>::Segment_2
|
|
SegmentC2<R>::opposite() const
|
|
{
|
|
return SegmentC2<R>(target(), source());
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
Bbox_2
|
|
SegmentC2<R>::bbox() const
|
|
{
|
|
return source().bbox() + target().bbox();
|
|
}
|
|
|
|
template < class R >
|
|
inline
|
|
bool
|
|
SegmentC2<R>::is_degenerate() const
|
|
{
|
|
return source() == target();
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
bool
|
|
SegmentC2<R>::is_horizontal() const
|
|
{
|
|
return y_equal(source(), target());
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
bool
|
|
SegmentC2<R>::is_vertical() const
|
|
{
|
|
return x_equal(source(), target());
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_INLINE
|
|
bool
|
|
SegmentC2<R>::
|
|
has_on(const typename SegmentC2<R>::Point_2 &p) const
|
|
{
|
|
return are_ordered_along_line(source(), p, target());
|
|
}
|
|
|
|
template < class R >
|
|
CGAL_KERNEL_MEDIUM_INLINE
|
|
bool
|
|
SegmentC2<R>::
|
|
collinear_has_on(const typename SegmentC2<R>::Point_2 &p) const
|
|
{
|
|
return collinear_are_ordered_along_line(source(), p, target());
|
|
}
|
|
|
|
#ifndef CGAL_NO_OSTREAM_INSERT_SEGMENTC2
|
|
template < class R >
|
|
std::ostream &
|
|
operator<<(std::ostream &os, const SegmentC2<R> &s)
|
|
{
|
|
switch(os.iword(IO::mode)) {
|
|
case IO::ASCII :
|
|
return os << s.source() << ' ' << s.target();
|
|
case IO::BINARY :
|
|
return os << s.source() << s.target();
|
|
default:
|
|
return os << "SegmentC2(" << s.source() << ", " << s.target() << ")";
|
|
}
|
|
}
|
|
#endif // CGAL_NO_OSTREAM_INSERT_SEGMENTC2
|
|
|
|
#ifndef CGAL_NO_ISTREAM_EXTRACT_SEGMENTC2
|
|
template < class R >
|
|
std::istream &
|
|
operator>>(std::istream &is, SegmentC2<R> &s)
|
|
{
|
|
typename R::Point_2 p, q;
|
|
|
|
is >> p >> q;
|
|
|
|
if (is)
|
|
s = SegmentC2<R>(p, q);
|
|
return is;
|
|
}
|
|
#endif // CGAL_NO_ISTREAM_EXTRACT_SEGMENTC2
|
|
|
|
CGAL_END_NAMESPACE
|
|
|
|
#endif // CGAL_CARTESIAN_SEGMENT_2_H
|