mirror of https://github.com/CGAL/cgal
110 lines
4.7 KiB
C++
110 lines
4.7 KiB
C++
// Copyright (c) 2014
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// INRIA Saclay-Ile de France (France)
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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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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Marc Glisse
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#ifndef CGAL_KERNEL_D_CARTESIAN_CHANGE_FT_H
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#define CGAL_KERNEL_D_CARTESIAN_CHANGE_FT_H
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#include <CGAL/basic.h>
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#include <CGAL/NT_converter.h>
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#include <CGAL/transforming_iterator.h>
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#include <CGAL/NewKernel_d/Cartesian_complete.h>
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namespace CGAL {
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template < typename Base_, typename FT_, typename LA_=CGAL::LA_eigen<FT_,typename Base_::Default_ambient_dimension> >
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struct Cartesian_change_FT_base : public
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Base_
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{
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constexpr Cartesian_change_FT_base(){}
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constexpr Cartesian_change_FT_base(int d):Base_(d){}
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typedef Cartesian_change_FT_base Self;
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typedef Base_ Kernel_base;
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typedef LA_ LA;
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template <class T, class D=void> struct Type : Inherit_type<Base_, T> {};
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template <class D> struct Type <FT_tag, D> { typedef FT_ type; };
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template <class D> struct Type <RT_tag, D> { typedef FT_ type; };
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typedef NT_converter<typename Get_type<Kernel_base, FT_tag>::type,FT_> FT_converter;
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typedef transforming_iterator<FT_converter,typename Kernel_base::Point_cartesian_const_iterator> Point_cartesian_const_iterator;
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typedef transforming_iterator<FT_converter,typename Kernel_base::Vector_cartesian_const_iterator> Vector_cartesian_const_iterator;
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//FIXME: use Iterator_list!
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/*
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template<class T,bool= std::is_same<typename iterator_tag_traits<T>::value_tag,FT_tag>::value>
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struct Iterator : Get_type<Kernel_base,T> {};
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template<class T> struct Iterator<T,true> {
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typedef transforming_iterator<FT_converter,typename Get_type<Kernel_base,T>::type> type;
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};
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*/
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template<class Tag_,class Type_>
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struct Construct_cartesian_const_iterator_ {
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typedef typename Get_functor<Kernel_base, Tag_>::type Functor_base;
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Construct_cartesian_const_iterator_(){}
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Construct_cartesian_const_iterator_(Self const&r):f(r){}
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Functor_base f;
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typedef Type_ result_type;
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template<class T>
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result_type operator()(T const& v, Begin_tag)const{
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return make_transforming_iterator(f(v,Begin_tag()),FT_converter());
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}
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template<class T>
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result_type operator()(T const& v, End_tag)const{
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return make_transforming_iterator(f(v,End_tag()),FT_converter());
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}
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};
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typedef Construct_cartesian_const_iterator_<Construct_ttag<Point_cartesian_const_iterator_tag>,Point_cartesian_const_iterator> Construct_point_cartesian_const_iterator;
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typedef Construct_cartesian_const_iterator_<Construct_ttag<Vector_cartesian_const_iterator_tag>,Vector_cartesian_const_iterator> Construct_vector_cartesian_const_iterator;
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template<class Tag_>
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struct Compute_cartesian_coordinate {
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typedef typename Get_functor<Kernel_base, Tag_>::type Functor_base;
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Compute_cartesian_coordinate(){}
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Compute_cartesian_coordinate(Self const&r):f(r){}
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Functor_base f;
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typedef FT_ result_type;
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template<class Obj_>
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result_type operator()(Obj_ const& v,int i)const{
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return FT_converter()(f(v,i));
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}
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};
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template<class T,class U=void,class=typename Get_functor_category<Cartesian_change_FT_base,T>::type> struct Functor :
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Inherit_functor<Kernel_base,T,U> { };
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template<class T,class U> struct Functor<T,U,Compute_tag> { };
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template<class T,class U> struct Functor<T,U,Predicate_tag> { };
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template<class D> struct Functor<Compute_point_cartesian_coordinate_tag,D,Compute_tag> {
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typedef Compute_cartesian_coordinate<Compute_point_cartesian_coordinate_tag> type;
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};
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template<class D> struct Functor<Compute_vector_cartesian_coordinate_tag,D,Compute_tag> {
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typedef Compute_cartesian_coordinate<Compute_vector_cartesian_coordinate_tag> type;
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};
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template<class D> struct Functor<Construct_ttag<Point_cartesian_const_iterator_tag>,D,Construct_iterator_tag> {
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typedef Construct_point_cartesian_const_iterator type;
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};
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template<class D> struct Functor<Construct_ttag<Vector_cartesian_const_iterator_tag>,D,Construct_iterator_tag> {
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typedef Construct_vector_cartesian_const_iterator type;
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};
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};
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template < typename Base_, typename FT_>
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struct Cartesian_change_FT : public
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Cartesian_change_FT_base<Base_,FT_>
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{
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constexpr Cartesian_change_FT(){}
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constexpr Cartesian_change_FT(int d):Cartesian_change_FT_base<Base_,FT_>(d){}
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};
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} //namespace CGAL
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#endif // CGAL_KERNEL_D_CARTESIAN_CHANGE_FT_H
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