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// Copyright (c) 2005-2008 Fernando Luis Cacciola Carballal. All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1.1/Straight_skeleton_2/include/CGAL/Polygon_offset_builder_traits_2.h $
// $Id: include/CGAL/Polygon_offset_builder_traits_2.h 08b27d3db14 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
// Author(s) : Fernando Cacciola <fernando_cacciola@ciudad.com.ar>
#ifndef CGAL_POLYGON_OFFSET_BUILDER_TRAITS_2_H
#define CGAL_POLYGON_OFFSET_BUILDER_TRAITS_2_H 1
#include <CGAL/license/Straight_skeleton_2.h>
#include <CGAL/Straight_skeleton_2/Straight_skeleton_aux.h>
#include <CGAL/Straight_skeleton_2/Straight_skeleton_builder_traits_2_aux.h>
#include <CGAL/Straight_skeleton_builder_traits_2.h>
#include <CGAL/predicates/Polygon_offset_pred_ftC2.h>
#include <CGAL/constructions/Polygon_offset_cons_ftC2.h>
#include <optional>
namespace CGAL {
namespace CGAL_SS_i {
template<class K>
struct Compare_offset_against_event_time_2 : Functor_base_2<K>
{
typedef Functor_base_2<K> Base ;
typedef typename Base::FT FT ;
typedef typename Base::Trisegment_2_ptr Trisegment_2_ptr ;
typedef Uncertain<Comparison_result> result_type ;
Uncertain<Comparison_result> operator() ( FT const& aT, Trisegment_2_ptr const& aE ) const
{
return compare_offset_against_isec_timeC2(aT,aE) ;
}
};
template<class K>
struct Construct_offset_point_2 : Functor_base_2<K>
{
typedef Functor_base_2<K> Base ;
typedef typename Base::FT FT ;
typedef typename Base::Point_2 Point_2 ;
typedef typename Base::Segment_2_with_ID Segment_2_with_ID ;
typedef typename Base::Trisegment_2_ptr Trisegment_2_ptr ;
typedef std::optional<Point_2> result_type ;
result_type operator() ( FT const& aT
, Segment_2_with_ID const& aE0
, FT const& aWeight0
, Segment_2_with_ID const& aE1
, FT const& aWeight1
, Trisegment_2_ptr const& aNode
) const
{
No_caches<K> no_caches;
result_type p = construct_offset_pointC2(aT,aE0,aWeight0,aE1,aWeight1,aNode, no_caches);
return p ;
}
};
} // namespace CGAL_SS_i
template<class K>
struct Polygon_offset_builder_traits_2_functors
{
typedef CGAL_SS_i::Compare_offset_against_event_time_2<K> Compare_offset_against_event_time_2 ;
typedef CGAL_SS_i::Compare_ss_event_times_2 <K> Compare_ss_event_times_2 ;
typedef CGAL_SS_i::Construct_offset_point_2 <K> Construct_offset_point_2 ;
typedef CGAL_SS_i::Construct_ss_event_time_and_point_2<K> Construct_ss_event_time_and_point_2 ;
} ;
template<class K>
struct Polygon_offset_builder_traits_2_base
{
typedef K Kernel ;
typedef typename K::FT FT ;
typedef typename K::Point_2 Point_2 ;
typedef CGAL_SS_i::Segment_2_with_ID<K> Segment_2 ;
typedef CGAL_SS_i::Segment_2_with_ID<K> Segment_2_with_ID ; // for BOOST_MPL_HAS_XXX_TRAIT_DEF
typedef CGAL::Trisegment_2<K, Segment_2_with_ID> Trisegment_2 ;
typedef typename Trisegment_2::Self_ptr Trisegment_2_ptr ;
} ;
template<class Is_filtered_kernel, class K>
class Polygon_offset_builder_traits_2_impl ;
template<class K>
class Polygon_offset_builder_traits_2_impl<Tag_false,K>
: public Polygon_offset_builder_traits_2_base<K>
{
typedef Polygon_offset_builder_traits_2_functors<K> Unfiltering ;
public:
typedef Unfiltered_predicate_adaptor<typename Unfiltering::Compare_offset_against_event_time_2>
Compare_offset_against_event_time_2 ;
typedef Unfiltered_predicate_adaptor<typename Unfiltering::Compare_ss_event_times_2>
Compare_ss_event_times_2 ;
typedef typename Unfiltering::Construct_offset_point_2 Construct_offset_point_2 ;
typedef typename Unfiltering::Construct_ss_event_time_and_point_2 Construct_ss_event_time_and_point_2 ;
} ;
template<class K>
class Polygon_offset_builder_traits_2_impl<Tag_true,K>
: public Polygon_offset_builder_traits_2_base<K>
{
typedef typename K::Exact_kernel EK ;
typedef typename K::Approximate_kernel FK ;
typedef Polygon_offset_builder_traits_2_functors<EK> Exact ;
typedef Polygon_offset_builder_traits_2_functors<FK> Filtering ;
typedef Polygon_offset_builder_traits_2_functors<K> Unfiltering ;
typedef Cartesian_converter<K,EK> BaseC2E;
typedef Cartesian_converter<K,FK> BaseC2F;
typedef Cartesian_converter<EK,K> BaseE2C;
typedef Cartesian_converter<FK,K> BaseF2C;
typedef Cartesian_converter<K,K> BaseC2C;
typedef CGAL_SS_i::SS_converter<BaseC2E> C2E ;
typedef CGAL_SS_i::SS_converter<BaseC2F> C2F ;
typedef CGAL_SS_i::SS_converter<BaseE2C> E2C ;
typedef CGAL_SS_i::SS_converter<BaseF2C> F2C ;
typedef CGAL_SS_i::SS_converter<BaseC2C> C2C ;
public:
typedef Filtered_predicate<typename Exact ::Compare_offset_against_event_time_2
,typename Filtering::Compare_offset_against_event_time_2
, C2E
, C2F
>
Compare_offset_against_event_time_2 ;
typedef Filtered_predicate< typename Exact ::Compare_ss_event_times_2
, typename Filtering::Compare_ss_event_times_2
, C2E
, C2F
>
Compare_ss_event_times_2 ;
typedef CGAL_SS_i::Exceptionless_filtered_construction< typename Unfiltering::Construct_offset_point_2
, typename Exact ::Construct_offset_point_2
, typename Filtering::Construct_offset_point_2
, C2E
, C2F
, E2C
, F2C
>
Construct_offset_point_2 ;
typedef CGAL_SS_i::Exceptionless_filtered_construction< typename Unfiltering::Construct_ss_event_time_and_point_2
, typename Exact ::Construct_ss_event_time_and_point_2
, typename Filtering::Construct_ss_event_time_and_point_2
, C2E
, C2F
, E2C
, F2C
>
Construct_ss_event_time_and_point_2 ;
} ;
template<class K>
class Polygon_offset_builder_traits_2
: public Polygon_offset_builder_traits_2_impl<typename CGAL_SS_i::Is_filtering_kernel<K>::type,K>
{
typedef Polygon_offset_builder_traits_2_impl<typename CGAL_SS_i::Is_filtering_kernel<K>::type,K> Base ;
public:
typedef typename Base::Compare_offset_against_event_time_2 Compare_offset_against_event_time_2 ;
typedef typename Base::Compare_ss_event_times_2 Compare_ss_event_times_2 ;
typedef typename Base::Construct_offset_point_2 Construct_offset_point_2 ;
typedef typename Base::Construct_ss_event_time_and_point_2 Construct_ss_event_time_and_point_2 ;
Compare_offset_against_event_time_2 compare_offset_against_event_time_2_object() const
{ return Compare_offset_against_event_time_2() ; }
Compare_ss_event_times_2 compare_ss_event_times_2_object() const
{ return Compare_ss_event_times_2() ; }
Construct_offset_point_2 construct_offset_point_2_object() const
{ return Construct_offset_point_2() ; }
Construct_ss_event_time_and_point_2 construct_ss_event_time_and_point_2_object() const
{ return Construct_ss_event_time_and_point_2() ; }
} ;
} // namespace CGAL
#endif // CGAL_POLYGON_OFFSET_BUILDER_TRAITS_2_H
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