mirror of https://github.com/CGAL/cgal
294 lines
6.8 KiB
C++
294 lines
6.8 KiB
C++
// ======================================================================
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//
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// Copyright (c) 1999 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 : SegmentH3.h
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// package : H3
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// revision : $Revision$
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// revision_date : $Date$
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// author(s) : Stefan Schirra
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//
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//
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// coordinator : MPI, Saarbruecken (<Stefan.Schirra@mpi-sb.mpg.de>)
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// ======================================================================
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#ifndef CGAL_SEGMENTH3_H
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#define CGAL_SEGMENTH3_H
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#include <CGAL/LineH3.h>
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CGAL_BEGIN_NAMESPACE
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template < class R >
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class Segment_repH3 : public Ref_counted
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{
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public:
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Segment_repH3() {}
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Segment_repH3(const PointH3<R>& sp, const PointH3<R>& ep)
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: startpoint(sp), endpoint(ep) {}
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const PointH3<R> & start() const { return startpoint; }
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const PointH3<R> & end() const { return endpoint; }
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private:
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PointH3<R> startpoint, endpoint;
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};
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template < class R >
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class Simple_Segment_repH3
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{
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public:
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Simple_Segment_repH3() {}
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Simple_Segment_repH3(const PointH3<R>& sp, const PointH3<R>& ep)
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: startpoint(sp), endpoint(ep) {}
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const PointH3<R> & start() const { return startpoint; }
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const PointH3<R> & end() const { return endpoint; }
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private:
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PointH3<R> startpoint, endpoint;
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};
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template < class R_ >
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class SegmentH3
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: public R_::Segment_handle_3
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{
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public:
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typedef R_ R;
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typedef typename R::RT RT;
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typedef typename R::FT FT;
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typedef typename R::Segment_handle_3 Segment_handle_3_;
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typedef typename Segment_handle_3_::element_type Segment_ref_3;
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SegmentH3()
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: Segment_handle_3_(Segment_ref_3()) {}
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SegmentH3( const PointH3<R>& sp, const PointH3<R>& ep)
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: Segment_handle_3_(Segment_ref_3(sp, ep)) {}
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const PointH3<R> & source() const;
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const PointH3<R> & target() const;
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const PointH3<R> & start() const;
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const PointH3<R> & end() const;
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const PointH3<R> & min() const;
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const PointH3<R> & max() const;
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const PointH3<R> & vertex(int i) const;
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const PointH3<R> & point(int i) const;
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const PointH3<R> & operator[](int i) const;
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FT squared_length() const;
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DirectionH3<R>
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direction() const;
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LineH3<R> supporting_line() const;
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SegmentH3<R> opposite() const;
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SegmentH3<R> transform( const Aff_transformationH3<R> & t) const;
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Bbox_3 bbox() const;
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bool has_on(const PointH3<R> p) const;
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bool collinear_has_on(const PointH3<R> p) const;
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bool is_degenerate() const;
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bool operator==(const SegmentH3<R>& s) const;
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bool operator!=(const SegmentH3<R>& s) const;
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};
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::source() const
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{ return Ptr()->start(); }
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::target() const
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{ return Ptr()->end(); }
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::start() const
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{ return Ptr()->start(); }
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::end() const
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{ return Ptr()->end(); }
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template < class R >
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CGAL_KERNEL_INLINE
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const PointH3<R> &
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SegmentH3<R>::min() const
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{
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return
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lexicographically_xyz_smaller(target(),source()) ? 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 PointH3<R> &
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SegmentH3<R>::max() const
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{
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return lexicographically_xyz_smaller_or_equal(source(),target()) ?
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target() : source();
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}
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::vertex(int i) const
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{ return ( i%2 == 0 ) ? start() : end() ; }
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::point(int i) const
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{ return ( i%2 == 0 ) ? start() : end() ; }
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template < class R >
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inline
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const PointH3<R> &
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SegmentH3<R>::operator[](int i) const
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{ return ( i%2 == 0 ) ? start() : end() ; }
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template < class R >
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CGAL_KERNEL_INLINE
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typename SegmentH3<R>::FT
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SegmentH3<R>::squared_length() const
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{
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return (Ptr()->end() - Ptr()->start()) *
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(Ptr()->end() - Ptr()->start()) ;
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}
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template < class R >
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CGAL_KERNEL_INLINE
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DirectionH3<R>
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SegmentH3<R>::direction() const
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{ return DirectionH3<R>( Ptr()->end() - Ptr()->start() ); }
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template < class R >
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CGAL_KERNEL_INLINE
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LineH3<R>
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SegmentH3<R>::supporting_line() const
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{ return LineH3<R>(Ptr()->start(), Ptr()->end()); }
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template < class R >
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CGAL_KERNEL_INLINE
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SegmentH3<R>
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SegmentH3<R>::opposite() const
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{ return SegmentH3<R>(Ptr()->end(), Ptr()->start()); }
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template < class R >
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CGAL_KERNEL_INLINE
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SegmentH3<R>
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SegmentH3<R>::
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transform( const Aff_transformationH3<R>& t) const
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{
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return SegmentH3<R>(t.transform(Ptr()->start()),
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t.transform(Ptr()->end()) );
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}
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template < class R >
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CGAL_KERNEL_INLINE
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Bbox_3
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SegmentH3<R>::bbox() const
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{ return source().bbox() + target().bbox(); }
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#ifndef CGAL_NO_OSTREAM_INSERT_SEGMENTH3
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template < class R >
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std::ostream &operator<<(std::ostream &os, const SegmentH3<R> &s)
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{
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switch(os.iword(IO::mode))
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{
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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 << "SegmentH3(" << s.source()
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<< ", " << s.target() << ")";
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}
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}
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#endif // CGAL_NO_OSTREAM_INSERT_SEGMENTH3
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#ifndef CGAL_NO_ISTREAM_EXTRACT_SEGMENTH3
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template < class R >
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std::istream &operator>>(std::istream &is, SegmentH3<R> &s)
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{
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PointH3<R> p, q;
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is >> p >> q;
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s = SegmentH3<R>(p, q);
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return is;
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}
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#endif // CGAL_NO_ISTREAM_EXTRACT_SEGMENTH3
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template < class R >
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inline
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bool
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SegmentH3<R>::is_degenerate() const
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{ return source()==target(); }
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template < class R >
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CGAL_KERNEL_INLINE
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bool
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SegmentH3<R>::has_on(const PointH3<R> p) const
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{
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return( ( p == start() )
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|| ( p == end() )
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|| ( ( collinear(p,source(),target() )
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&&( DirectionH3<R>( p - Ptr()->start())
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!=
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DirectionH3<R>( p - Ptr()->end()))
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)
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)
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);
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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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SegmentH3<R>::collinear_has_on(const PointH3<R> p) const
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{
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return( ( p == start() )
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|| ( p == end() )
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|| ( DirectionH3<R>( p - Ptr()->start())
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!=
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DirectionH3<R>( p - Ptr()->end())
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)
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);
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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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SegmentH3<R>::operator==(const SegmentH3<R>& s) const
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{
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return ( (start() == s.start() )
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&&(end() == s.end() ) );
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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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SegmentH3<R>::operator!=(const SegmentH3<R>& s) const
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{ return ( !operator==(s) ); }
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CGAL_END_NAMESPACE
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#endif // CGAL_SEGMENTH3_H
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