mirror of https://github.com/CGAL/cgal
111 lines
4.1 KiB
C++
111 lines
4.1 KiB
C++
// Copyright (c) 2024 GeometryFactory.
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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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// $URL$
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// $Id$
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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) : Sebastien Loriot
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//
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#ifndef CGAL_AABB_POLYLINE_SEGMENT_PRIMITIVE_2_H_
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#define CGAL_AABB_POLYLINE_SEGMENT_PRIMITIVE_2_H_
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#include <CGAL/license/AABB_tree.h>
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#include <CGAL/disable_warnings.h>
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#include <CGAL/AABB_primitive.h>
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#include <iterator>
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namespace CGAL {
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namespace internal {
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template <class GeomTraits, class Iterator>
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struct Segment_2_from_point_iterator_property_map {
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//classical typedefs
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typedef Iterator key_type;
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typedef typename GeomTraits::Segment_2 value_type;
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typedef typename GeomTraits::Segment_2 reference; // The segments are created on the fly, so working with references is not possible.
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typedef boost::readable_property_map_tag category;
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typedef Segment_2_from_point_iterator_property_map<GeomTraits, Iterator> Self;
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Segment_2_from_point_iterator_property_map(Iterator b, Iterator e) : begin(b), end(e) {}
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Segment_2_from_point_iterator_property_map() {}
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inline friend reference // Cannot return reference as the Segment does not exist, only the points exist.
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get(Self s, key_type it)
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{
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typename Iterator::value_type& p = *it;
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it++;
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if (it == s.end)
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return typename GeomTraits::Construct_segment_2()(p, *s.begin);
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else
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return typename GeomTraits::Construct_segment_2()( p, *it );
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}
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Iterator begin, end;
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};
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}//namespace internal
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/*!
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* \ingroup PkgAABBTreeRef
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* Primitive type that uses as identifier an iterator with a 3D segment as `value_type`.
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* The iterator from which the primitive is built should not be invalided
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* while the AABB tree holding the primitive is in use.
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*
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* \cgalModels{AABBPrimitive}
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*
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* \tparam GeomTraits is a traits class providing the nested type `Point_2` and `Segment_2`.
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* It also provides the functor `Construct_source_2` that has an operator taking a `Segment_2`
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* and returning its source as a type convertible to `Point_2`.
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* \tparam Iterator is a model of `ForwardIterator` with its value type convertible to `GeomTraits::Segment_2`
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* \tparam CacheDatum is either `CGAL::Tag_true` or `CGAL::Tag_false`. In the former case,
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* the datum is stored in the primitive, while in the latter it is
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* constructed on the fly to reduce the memory footprint.
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* The default is `CGAL::Tag_false` (datum is not stored).
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*
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* \sa `AABBPrimitive`
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* \sa `AABB_primitive<Id,ObjectPropertyMap,PointPropertyMapPolyhedron,ExternalPropertyMaps,CacheDatum>`
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* \sa `AABB_triangle_primitive_3<Iterator,CacheDatum>`
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* \sa `AABB_halfedge_graph_segment_primitive<HalfedgeGraph,OneHalfedgeGraphPerTree,CacheDatum>`
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* \sa `AABB_face_graph_triangle_primitive<FaceGraph,OneFaceGraphPerTree,CacheDatum>`
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*/
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template < class PointRange,
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class GeomTraits,
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class Iterator,
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class CacheDatum=Tag_false>
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class AABB_polyline_segment_primitive_2
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#ifndef DOXYGEN_RUNNING
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: public AABB_primitive< Iterator,
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internal::Segment_2_from_point_iterator_property_map<GeomTraits, Iterator>,
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Input_iterator_property_map<Iterator>,
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Tag_true,
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CacheDatum >
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#endif
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{
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typedef AABB_primitive< Iterator,
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internal::Segment_2_from_point_iterator_property_map<GeomTraits, Iterator>,
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Input_iterator_property_map<Iterator>,
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Tag_true,
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CacheDatum > Base;
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public:
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AABB_polyline_segment_primitive_2(Iterator it, PointRange& poly) : Base(it) {}
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/// \internal
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static typename Base::Shared_data construct_shared_data(PointRange& range) {
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return std::make_pair(internal::Segment_2_from_point_iterator_property_map<GeomTraits, Iterator>(range.begin(), range.end()), Input_iterator_property_map<Iterator>());
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}
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};
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} // end namespace CGAL
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#include <CGAL/enable_warnings.h>
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#endif // CGAL_AABB_POLYLINE_SEGMENT_PRIMITIVE_2_H_
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