155 lines
4.2 KiB
C++
155 lines
4.2 KiB
C++
// Copyright (c) 1999
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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/function_objects.h $
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// $Id: function_objects.h 8bb22d5 2020-03-26T14:23:37+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) : Stefan Schirra
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#ifndef CGAL_KERNEL_D_FUNCTION_OBJECTS_H
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#define CGAL_KERNEL_D_FUNCTION_OBJECTS_H
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#include <CGAL/intersections_d.h>
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// These functors come from the 2D-3D kernels.
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// Since they have changed there, they now need to be copied here.
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namespace CGAL {
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namespace internal {
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template <class ToBeConstructed>
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class Construct
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{
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public:
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typedef ToBeConstructed result_type;
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template <class ... A>
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ToBeConstructed
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operator()( A&& ... a) const
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{ return ToBeConstructed(std::forward<A>(a)...); }
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};
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class Call_has_on_positive_side
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{
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public:
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typedef bool result_type;
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template <class Cls, class Arg>
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bool
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operator()( const Cls& c, const Arg& a) const
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{ return c.has_on_positive_side(a); }
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};
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class Call_oriented_side
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{
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public:
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typedef Oriented_side result_type;
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template <class Cls, class Arg>
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Oriented_side
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operator()( const Cls& c, const Arg& a) const
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{ return c.oriented_side(a); }
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};
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template<class R>
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class Intersect
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{
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private:
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typedef typename R::Line_d Line_d;
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typedef typename R::Point_d Point_d;
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typedef typename R::Segment_d Segment_d;
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typedef typename R::Ray_d Ray_d;
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typedef typename R::Hyperplane_d Hyperplane_d;
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public:
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template <typename>
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struct result;
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template <typename F>
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struct result<F(Line_d, Line_d)>
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{ typedef boost::optional< boost::variant< Point_d, Line_d > > type; };
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template <typename F>
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struct result<F(Segment_d, Line_d)>
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{ typedef boost::optional< boost::variant< Point_d, Segment_d > > type; };
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template <typename F>
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struct result<F(Line_d, Segment_d)> : result<F(Segment_d, Line_d)>
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{ };
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template <typename F>
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struct result<F(Segment_d, Segment_d)>
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{ typedef boost::optional< boost::variant< Point_d, Segment_d > > type; };
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template <typename F>
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struct result<F(Ray_d, Line_d)>
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{ typedef boost::optional< boost::variant< Point_d, Ray_d > > type; };
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template <typename F>
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struct result<F(Line_d, Ray_d)> : result<F(Ray_d, Line_d)>
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{ };
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template <typename F>
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struct result<F(Ray_d, Segment_d)>
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{ typedef boost::optional< boost::variant< Point_d, Segment_d > > type; };
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template <typename F>
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struct result<F(Segment_d, Ray_d)> : result<F(Ray_d, Segment_d)>
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{ };
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template <typename F>
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struct result<F(Ray_d, Ray_d)>
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{ typedef boost::optional< boost::variant< Point_d, Segment_d, Ray_d > > type; };
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template <typename F>
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struct result<F(Hyperplane_d, Line_d)>
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{ typedef boost::optional< boost::variant< Point_d, Line_d > > type; };
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template <typename F>
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struct result<F(Line_d, Hyperplane_d)> : result<F(Hyperplane_d, Line_d)>
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{ };
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template <typename F>
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struct result<F(Hyperplane_d, Ray_d)>
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{ typedef boost::optional< boost::variant< Point_d, Ray_d > > type; };
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template <typename F>
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struct result<F(Ray_d, Hyperplane_d)> : result<F(Hyperplane_d, Ray_d)>
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{ };
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template <typename F>
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struct result<F(Hyperplane_d, Segment_d)>
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{ typedef boost::optional< boost::variant< Point_d, Segment_d > > type; };
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template <typename F>
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struct result<F(Segment_d, Hyperplane_d)> : result<F(Hyperplane_d, Segment_d)>
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{ };
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template <class T1, class T2>
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typename result<Intersect(T1,T2)>::type
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operator()(const T1& t1, const T2& t2) const
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{ return Intersections::internal::intersection(t1, t2, R()); }
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};
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template<class R>
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class Do_intersect
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{
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public:
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typedef bool result_type;
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template <class T1, class T2>
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bool
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operator()(const T1& t1, const T2& t2) const
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{ return CGAL::Intersections::internal::do_intersect(t1, t2, R()); }
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};
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} // end namespace internal
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} //namespace CGAL
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#endif // CGAL_KERNEL_D_FUNCTION_OBJECTS_H
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