mirror of https://github.com/CGAL/cgal
274 lines
5.9 KiB
C++
274 lines
5.9 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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// release :
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// release_date : 2000, August 16
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//
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// source : webS2/S2.lw
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// file : include/CGAL/SimpleCartesian/PointS2.h
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// package : S2 (1.7)
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// maintainer : Stefan Schirra <stschirr@mpi-sb.mpg.de>
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// revision : 1.6
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// revision_date : 27 Jun 2000
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// author(s) : Stefan Schirra
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// based on code by
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// Andreas Fabri and
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// Herve Brönnimann
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//
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// coordinator : MPI, Saarbrücken
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// ======================================================================
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#ifndef CGAL_POINTS2_H
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#define CGAL_POINTS2_H
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CGAL_BEGIN_NAMESPACE
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template < class FT >
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class PointS2
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{
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public:
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PointS2() {}
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PointS2(const Origin& ) : e0(FT(0)), e1(FT(0)) {}
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PointS2(const FT& hx, const FT& hy, const FT& hw);
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PointS2(const FT& x, const FT& y);
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bool operator==(const PointS2<FT>& p) const;
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bool operator!=(const PointS2<FT>& p) const;
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const FT& hx() const;
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const FT& hy() const;
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FT hw() const;
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const FT& x() const;
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const FT& y() const;
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FT cartesian(int i) const;
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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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Bbox_2 bbox() const;
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PointS2<FT> transform(const Aff_transformationS2<FT>& ) const;
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// protected:
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PointS2(const VectorS2<FT>& v);
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FT e0;
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FT e1;
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};
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CGAL_END_NAMESPACE
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#include <CGAL/Origin.h>
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#include <CGAL/SimpleCartesian/VectorS2.h>
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#include <CGAL/SimpleCartesian/Aff_transformationS2.h>
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#include <CGAL/Bbox_2.h>
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#include <CGAL/number_utils.h>
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CGAL_BEGIN_NAMESPACE
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template < class FT >
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CGAL_KERNEL_CTOR_INLINE
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PointS2<FT>::PointS2(const VectorS2<FT>& v)
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{ e0 = v.e0; e1 = v.e1; }
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template < class FT >
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CGAL_KERNEL_CTOR_INLINE
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PointS2<FT>::PointS2(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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{ e0 = hx/hw; e1 = hy/hw; }
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else
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{ e0 = hx; e1 = hy; }
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}
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template < class FT >
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CGAL_KERNEL_CTOR_INLINE
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PointS2<FT>::PointS2(const FT& x, const FT& y)
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{ e0 = x; e1 = y; }
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template < class FT >
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inline
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bool
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PointS2<FT>::operator==(const PointS2<FT>& p) const
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{ return ((x() == p.x()) && (y() == p.y())) ; }
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template < class FT >
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inline
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bool
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PointS2<FT>::operator!=(const PointS2<FT>& p) const
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{ return !(*this == p); }
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template < class FT >
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inline
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const FT&
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PointS2<FT>::x() const
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{ return e0; }
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template < class FT >
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inline
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const FT&
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PointS2<FT>::y() const
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{ return e1 ; }
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template < class FT >
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CGAL_KERNEL_INLINE
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FT
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PointS2<FT>::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 FT >
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inline
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FT
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PointS2<FT>::operator[](int i) const
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{ return cartesian(i); }
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template < class FT >
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inline
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int
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PointS2<FT>::dimension() const
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{ return 2; }
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template < class FT >
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inline
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const FT&
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PointS2<FT>::hx() const
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{ return e0; }
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template < class FT >
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inline
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const FT&
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PointS2<FT>::hy() const
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{ return e1; }
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template < class FT >
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inline
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FT
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PointS2<FT>::hw() const
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{ return FT(1); }
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template < class FT >
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inline
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FT
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PointS2<FT>::homogeneous(int i) const
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{
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CGAL_kernel_precondition( (i>=0) && (i<=2) );
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if (i<2) return cartesian(i);
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return FT(1);
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}
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template < class FT >
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inline
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PointS2<FT>
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operator+(const PointS2<FT>& p, const VectorS2<FT>& v)
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{ return PointS2<FT>(p.x() + v.x(), p.y() + v.y()) ; }
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template < class FT >
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inline
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PointS2<FT>
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operator-(const PointS2<FT>& p, const VectorS2<FT>& v)
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{ return PointS2<FT>(p.x() - v.x(), p.y() - v.y()) ; }
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template < class FT >
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inline
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PointS2<FT>
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operator+(const Origin& , const VectorS2<FT>& v)
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{ return PointS2<FT>(v) ; }
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template < class FT >
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inline
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PointS2<FT> operator-(const Origin& , const VectorS2<FT>& v)
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{ return PointS2<FT>(-v) ; }
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template < class FT >
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inline
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VectorS2<FT>
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operator-(const PointS2<FT>& p, const PointS2<FT>& q)
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{ return VectorS2<FT>(p.x() - q.x(), p.y() - q.y()) ; }
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template < class FT >
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inline
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VectorS2<FT>
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operator-(const PointS2<FT>& p, const Origin& )
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{ return VectorS2<FT>(p) ; }
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template < class FT >
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inline
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VectorS2<FT>
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operator-(const Origin& , const PointS2<FT>& p)
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{ return VectorS2<FT>(-p.x(), -p.y()) ; }
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template < class FT >
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CGAL_KERNEL_INLINE
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PointS2<FT>
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PointS2<FT>::transform( const Aff_transformationS2<FT>& t) const
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{ return t.transform(*this); }
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template < class FT >
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CGAL_KERNEL_INLINE
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Bbox_2
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PointS2<FT>::bbox() const
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{
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double bx = CGAL::to_double(x());
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double by = CGAL::to_double(y());
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return Bbox_2(bx,by, bx,by);
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}
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#ifndef CGAL_NO_OSTREAM_INSERT_POINTS2
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template < class FT >
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std::ostream&
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operator<<(std::ostream& os, const PointS2<FT>& p)
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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 << p.x() << ' ' << p.y();
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case IO::BINARY :
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write(os, p.x());
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write(os, p.y());
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return os;
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default:
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return os << "PointS2(" << p.x() << ", " << p.y() << ')';
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}
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}
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#endif // CGAL_NO_OSTREAM_INSERT_POINTS2
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#ifndef CGAL_NO_ISTREAM_EXTRACT_POINTS2
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template < class FT >
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std::istream&
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operator>>(std::istream& is, PointS2<FT>& p)
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{
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FT x, y;
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switch(is.iword(IO::mode))
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{
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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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CGAL_kernel_assertion_msg(false,"Stream must be in ascii or binary mode");
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// throw ios_base::failure("Stream must be in ascii or binary mode");
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}
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p = PointS2<FT>(x, y);
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return is;
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}
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#endif // CGAL_NO_ISTREAM_EXTRACT_POINTS2
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CGAL_END_NAMESPACE
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#endif // CGAL_POINTS2_H
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