146 lines
3.2 KiB
C++
146 lines
3.2 KiB
C++
// Copyright (c) 2003,2004 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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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Apollonius_graph_2/include/CGAL/Hyperbola_ray_2.h $
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// $Id: Hyperbola_ray_2.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Menelaos Karavelas <mkaravel@iacm.forth.gr>
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#ifndef CGAL_HYPERBOLA_RAY_2_H
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#define CGAL_HYPERBOLA_RAY_2_H
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#include <CGAL/license/Apollonius_graph_2.h>
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#include <CGAL/Hyperbola_segment_2.h>
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namespace CGAL {
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template < class Gt >
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class Hyperbola_ray_2 : public Hyperbola_segment_2< Gt >
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{
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public:
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typedef Sign Hyperbola_direction;
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typedef CGAL::Hyperbola_segment_2<Gt> Base;
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typedef typename Base::Site_2 Site_2;
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typedef typename Base::Point_2 Point_2;
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typedef typename Base::Segment_2 Segment_2;
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typedef typename Gt::Ray_2 Ray_2;
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typedef typename Base::FT FT;
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// typedef typename R::RT FT;
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// typedef double FT;
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// typedef CGAL::Point_2< Cartesian<double> > Point_2;
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// typedef CGAL::Segment_2< Cartesian<double> > Segment_2;
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// typedef CGAL::Ray_2< Cartesian<double> > Ray_2;
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using Base::t;
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using Base::f;
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protected:
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#if defined(__POWERPC__) && \
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defined(__GNUC__) && (__GNUC__ == 3 ) && (__GNUC_MINOR__ == 4)
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// hack to avoid nasty warning for G++ 3.4 on Darwin
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static FT OFFSET()
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{
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return FT(10000);
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}
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#else
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static const FT& OFFSET()
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{
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static const FT offset_(10000);
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return offset_;
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}
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#endif
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template< class Stream >
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inline
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void draw_ray(Stream &W) const
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{
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W << Ray_2(this->p1, this->p2);
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}
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Site_2 _f1, _f2;
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Point_2 _p;
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Hyperbola_direction _dir;
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public:
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Hyperbola_ray_2() : Hyperbola_segment_2< Gt >() {}
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Hyperbola_ray_2(const Site_2 &f1, const Site_2 &f2,
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const Point_2 &p,
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const Hyperbola_direction& direction) :
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Hyperbola_segment_2< Gt >(f1, f2, p, p),
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_f1(f1), _f2(f2), _p(p), _dir(direction)
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{
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FT t1 = t(this->p1);
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if ( direction == POSITIVE ) {
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this->p2 = f(t1 + this->STEP * OFFSET());
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} else {
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this->p2 = f(t1 - this->STEP * OFFSET());
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}
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}
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template<class QTWIDGET>
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void draw_qt(QTWIDGET& s)
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{
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if ( CGAL::is_zero(this->r) ) {
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draw_ray(s);
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return;
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}
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double width = s.x_max() - s.x_min();
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double height = s.y_max() - s.y_min();
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if ( width > height ) {
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this->STEP = height / 100.0;
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} else {
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this->STEP = width / 100.0;
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}
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FT t1 = t(this->p1);
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if ( _dir == POSITIVE ) {
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this->p2 = f(t1 + this->STEP * OFFSET());
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} else {
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this->p2 = f(t1 - this->STEP * OFFSET());
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}
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Hyperbola_segment_2< Gt >::draw(s);
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}
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template< class Stream >
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inline
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void draw(Stream& s) const
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{
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if ( CGAL::is_zero(this->r) ) {
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draw_ray(s);
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return;
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}
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Hyperbola_segment_2< Gt >::draw(s);
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}
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};
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template< class Stream, class Gt >
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inline
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Stream& operator<<(Stream &s, const Hyperbola_ray_2<Gt> &H)
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{
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H.draw(s);
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return s;
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}
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} //namespace CGAL
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#endif // CGAL_HYPERBOLA_RAY_2_H
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