mirror of https://github.com/CGAL/cgal
308 lines
6.3 KiB
C++
308 lines
6.3 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_3.h
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// revision : $Revision$
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// revision_date : $Date$
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// author : Andreas Fabri
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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_3_H
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#define CGAL_CARTESIAN_VECTOR_3_H
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#include <CGAL/Origin.h>
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#include <CGAL/Threetuple.h>
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CGAL_BEGIN_NAMESPACE
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template < class R_ >
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class VectorC3
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: public R_::template Handle<Threetuple<typename R_::FT> >::type
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{
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CGAL_VC7_BUG_PROTECTED
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typedef typename R_::FT FT;
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typedef typename R_::Point_3 Point_3;
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typedef typename R_::Vector_3 Vector_3;
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typedef typename R_::Direction_3 Direction_3;
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typedef typename R_::Aff_transformation_3 Aff_transformation_3;
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typedef Threetuple<FT> rep;
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typedef typename R_::template Handle<rep>::type base;
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public:
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typedef R_ R;
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VectorC3()
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: base(rep()) {}
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VectorC3(const Null_vector &)
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: base(rep(FT(0), FT(0), FT(0))) {}
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VectorC3(const Point_3 &p)
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: base(p) {}
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VectorC3(const Point_3 &a, const Point_3 &b)
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: base(b-a) {}
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VectorC3(const Direction_3 &d)
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: base(d) {}
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VectorC3(const FT &x, const FT &y, const FT &z)
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: base(rep(x, y, z)) {}
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VectorC3(const FT &x, const FT &y, const FT &z, const FT &w)
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{
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if (w != FT(1))
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initialize_with(rep(x/w, y/w, z/w));
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else
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initialize_with(rep(x, y, z));
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}
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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 & z() const
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{
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return Ptr()->e2;
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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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const FT & hz() const
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{
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return z();
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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 3;
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}
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Vector_3 operator+(const VectorC3 &w) const;
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Vector_3 operator-(const VectorC3 &w) const;
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Vector_3 operator-() const;
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Vector_3 operator/(const FT &c) const;
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FT operator*(const VectorC3 &w) const;
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FT squared_length() const;
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Direction_3 direction() const;
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Vector_3 transform(const Aff_transformation_3 &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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template < class R >
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inline
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bool
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operator==(const VectorC3<R> &v, const VectorC3<R> &w)
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{
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return w.x() == v.x() && w.y() == v.y() && w.z() == v.z();
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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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operator!=(const VectorC3<R> &v, const VectorC3<R> &w)
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{
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return !(v == w);
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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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operator==(const VectorC3<R> &v, const Null_vector &)
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{
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return CGAL_NTS is_zero(v.x()) && CGAL_NTS is_zero(v.y()) &&
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CGAL_NTS is_zero(v.z());
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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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operator==(const Null_vector &n, const VectorC3<R> &v)
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{
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return v == n;
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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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operator!=(const VectorC3<R> &v, const Null_vector &n)
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{
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return !(v == n);
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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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operator!=(const Null_vector &n, const VectorC3<R> &v)
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{
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return !(v == n);
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}
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template < class R >
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inline
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const typename VectorC3<R>::FT &
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VectorC3<R>::cartesian(int i) const
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{
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CGAL_kernel_precondition( (i>=0) && (i<3) );
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if (i==0) return x();
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if (i==1) return y();
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return z();
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}
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template < class R >
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inline
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const typename VectorC3<R>::FT &
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VectorC3<R>::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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typename VectorC3<R>::FT
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VectorC3<R>::homogeneous(int i) const
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{
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if (i==3) return FT(1);
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return cartesian(i);
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}
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template < class R >
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inline
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typename VectorC3<R>::Vector_3
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VectorC3<R>::
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operator+(const VectorC3<R> &w) const
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{
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return VectorC3<R>(x() + w.x(), y() + w.y(), z() + w.z());
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}
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template < class R >
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inline
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typename VectorC3<R>::Vector_3
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VectorC3<R>::operator-(const VectorC3<R> &w) const
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{
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return VectorC3<R>(x() - w.x(), y() - w.y(), z() - w.z());
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}
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template < class R >
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inline
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typename VectorC3<R>::Vector_3
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VectorC3<R>::operator-() const
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{
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return R().construct_opposite_vector_3_object()(*this);
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}
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template < class R >
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inline
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typename VectorC3<R>::FT
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VectorC3<R>::operator*(const VectorC3<R> &w) const
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{
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return x() * w.x() + y() * w.y() + z() * w.z();
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}
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template < class R >
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inline
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typename VectorC3<R>::FT
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VectorC3<R>::squared_length() const
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{
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return CGAL_NTS square(x()) + CGAL_NTS square(y()) + CGAL_NTS square(z());
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}
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template < class R >
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inline
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typename VectorC3<R>::Vector_3
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VectorC3<R>::
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operator/(const typename VectorC3<R>::FT &c) const
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{
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return VectorC3<R>(x()/c, y()/c, z()/c);
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}
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template < class R >
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inline
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typename VectorC3<R>::Direction_3
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VectorC3<R>::direction() const
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{
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return Direction_3(*this);
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}
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#ifndef CGAL_CARTESIAN_NO_OSTREAM_INSERT_VECTORC3
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template < class R >
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std::ostream &
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operator<<(std::ostream &os, const VectorC3<R> &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() << ' ' << v.z();
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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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write(os, v.z());
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return os;
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default:
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os << "VectorC3(" << v.x() << ", " << v.y() << ", " << v.z() << ")";
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return os;
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}
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}
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#endif // CGAL_CARTESIAN_NO_OSTREAM_INSERT_VECTORC3
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#ifndef CGAL_CARTESIAN_NO_ISTREAM_EXTRACT_VECTORC3
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template < class R >
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std::istream &
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operator>>(std::istream &is, VectorC3<R> &p)
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{
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typename R::FT x, y, z;
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switch(is.iword(IO::mode)) {
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case IO::ASCII :
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is >> x >> y >> z;
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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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read(is, z);
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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 = VectorC3<R>(x, y, z);
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return is;
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}
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#endif // CGAL_CARTESIAN_NO_ISTREAM_EXTRACT_VECTORC3
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CGAL_END_NAMESPACE
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#endif // CGAL_CARTESIAN_VECTOR_3_H
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