90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
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// Copyright (c) 1997-2000
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Kernel_d/include/CGAL/Kernel_d/Pair_d.h $
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// $Id: Pair_d.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Michael Seel <seel@mpi-sb.mpg.de>
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#ifndef CGAL_PAIR_D_H
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#define CGAL_PAIR_D_H
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#include <CGAL/basic.h>
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#include <CGAL/Handle_for.h>
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namespace CGAL {
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template <class R> class Segment_d;
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template <class R> class Ray_d;
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template <class R> class Line_d;
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template <class R>
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class Pair_d
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{
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typedef Pair_d<R> Self;
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typedef typename R::Point_d Point_d;
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typedef typename R::Vector_d Vector_d;
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typedef typename R::Direction_d Direction_d;
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Point_d _p[2];
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friend class Line_d<R>;
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friend class Ray_d<R>;
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friend class Segment_d<R>;
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/* Any line object in $d$ - space is defined by two points |_p1| and |_p2|
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respectively. There exists an orientation from _p1 to _p2. */
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public:
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Pair_d(int d = 0) { _p[0]=_p[1]=Point_d(d); }
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Pair_d(const Point_d& p, const Point_d& q)
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{ CGAL_assertion_msg((p.dimension() == q.dimension()),
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"Pair_d::constructor: source and target must have the same dimension.");
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_p[0]=p; _p[1]=q;
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}
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bool is_degenerate() const
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{ return (_p[0] == _p[1]); }
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Vector_d vector() const
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{ return (_p[1] - _p[0]); }
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Direction_d direction() const
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{ return vector().direction(); }
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void read(std::istream& is)
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{
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switch( get_mode(is) ) {
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case CGAL::IO::ASCII :
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is >> _p[0] >> _p[1]; break;
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case CGAL::IO::BINARY :
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CGAL::read(is, _p[0]); CGAL::read(is, _p[1]); break;
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default:
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CGAL_error_msg("\nStream must be in ascii or binary mode\n");
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}
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}
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void print(std::ostream& os, const char* _name) const
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{
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switch( get_mode(os) ) {
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case CGAL::IO::ASCII :
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os << _p[0] << " " << _p[1]; break;
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case CGAL::IO::BINARY :
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CGAL::write(os, _p[0]); CGAL::write(os, _p[1]); break;
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default :
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os << _name << "(" << _p[0] << ", " << _p[1] << ")"; break;
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}
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}
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}; // Pair_d<R>
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} //namespace CGAL
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#endif //CGAL_PAIR_D_H
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