mirror of https://github.com/CGAL/cgal
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
// Copyright (c) 1999-2004 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Mariette Yvinec
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// Sylvain Pion
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#ifndef CGAL_CARTESIAN_WEIGHTED_POINT_H
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#define CGAL_CARTESIAN_WEIGHTED_POINT_H
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#include <iostream>
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#include <CGAL/Kernel_traits.h>
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#include <CGAL/Dimension.h>
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#include <boost/utility/enable_if.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/logical.hpp>
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namespace CGAL {
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template < class R_ >
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class Weighted_pointC3 : public R_::Point_3
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{
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typedef typename R_::FT FT;
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public:
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typedef FT Weight;
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typedef typename R_::Point_3 Point;
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Weighted_pointC3 ()
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: Point(), _weight(0) {}
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//explicit
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Weighted_pointC3 (const Point &p)
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: Point(p), _weight(0)
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{
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// CGAL_error_msg( "Warning : truncated weight !!!");
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}
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Weighted_pointC3 (const Point &p, const Weight &w)
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: Point(p), _weight(w) {}
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// Constructors from coordinates are also provided for convenience, except
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// that they are only from Cartesian coordinates, and with no weight, so as
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// to avoid any potential ambiguity between the homogeneous weight and the
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// power weight (it should be easy enough to pass a Point explicitly in those
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// cases).
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// The enable_if complexity comes from the fact that we separate dimension 2 and 3.
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template < typename Tx, typename Ty, typename Tz >
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Weighted_pointC3 (const Tx &x, const Ty &y, const Tz &z,
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typename boost::enable_if< boost::mpl::and_<boost::is_convertible<Tx, FT>,
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boost::is_convertible<Ty, FT>,
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boost::is_convertible<Tz, FT>,
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boost::mpl::bool_<CGAL::Ambient_dimension<Point>::value == 3> > >::type* = 0)
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: Point(x, y, z), _weight(0) {}
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const Point & point() const
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{
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return *this;
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}
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const Weight & weight() const
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{
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return _weight;
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}
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private:
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Weight _weight;
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};
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template < class R_ >
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std::ostream &
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operator<<(std::ostream &os, const Weighted_pointC3<R_> &p)
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{
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switch(get_mode(os))
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{
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case IO::ASCII :
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return os << p.point() << " " << p.weight();
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case IO::BINARY :
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os << p.point();
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write(os, p.weight());
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return os;
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default:
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return os << "Weighted_point(" << p.point() << ", " << p.weight() << ")";
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}
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}
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template < class R_ >
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std::istream &
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operator>>(std::istream &is, Weighted_pointC3<R_> &wp)
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{
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typename Weighted_pointC3<R_>::Weight w;
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typename Weighted_pointC3<R_>::Point p;
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is >> p;
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if(!is) return is;
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if(is_ascii(is))
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is >> w;
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else
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read(is, w);
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if (is)
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wp = Weighted_point_3<R_>(p,w);
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return is;
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}
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} // namespace CGAL
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#endif // CGAL_CARTESIAN_WEIGHTED_POINT_H
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