mirror of https://github.com/CGAL/cgal
137 lines
5.9 KiB
C++
137 lines
5.9 KiB
C++
// Copyright (c) 2024 GeometryFactory (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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// $URL$
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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) : Sven Oesau
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//
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#ifndef CGAL_AABB_INDEXED_TRIANGLE_PRIMITIVE_2_H_
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#define CGAL_AABB_INDEXED_TRIANGLE_PRIMITIVE_2_H_
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#include <CGAL/license/AABB_tree.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, class PointIterator, class PointMap>
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struct Triangle_2_from_index_range_iterator_property_map {
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//classical typedefs
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typedef Iterator key_type;
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typedef typename GeomTraits::Triangle_2 value_type;
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typedef typename GeomTraits::Triangle_2 reference;
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typedef boost::readable_property_map_tag category;
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typedef Triangle_2_from_index_range_iterator_property_map<GeomTraits, Iterator, PointIterator, PointMap> Self;
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Triangle_2_from_index_range_iterator_property_map() {}
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Triangle_2_from_index_range_iterator_property_map(PointIterator b, PointMap& pmap) : begin(b), pmap(pmap) {}
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inline friend value_type
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get(Self s, key_type it)
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{
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return typename GeomTraits::Construct_triangle_2()(get(s.pmap, s.begin[(*it)[0]]), get(s.pmap, s.begin[(*it)[1]]), get(s.pmap, s.begin[(*it)[2]]));
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}
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PointIterator begin;
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PointMap pmap;
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};
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template <class GeomTraits, class Iterator, class PointIterator, class PointMap>
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struct Point_from_indexed_triangle_2_iterator_property_map {
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//classical typedefs
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typedef Iterator key_type;
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typedef typename PointMap::value_type value_type;
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typedef const value_type reference;
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typedef boost::readable_property_map_tag category;
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typedef Point_from_indexed_triangle_2_iterator_property_map<GeomTraits, Iterator, PointIterator, PointMap> Self;
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Point_from_indexed_triangle_2_iterator_property_map() {}
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Point_from_indexed_triangle_2_iterator_property_map(PointIterator b, PointMap &pmap) : begin(b), pmap(pmap) {}
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inline friend reference
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get(Self s, key_type it)
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{
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return get(s.pmap, s.begin[((*it)[0])]);
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}
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PointIterator begin;
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PointMap pmap;
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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 range of 3 indices 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 `Triangle_2`.
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* It also provides the functor `Construct_triangle_2` that has an operator taking 3 `Point_2` as
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* parameters and returns a `Triangle_2`
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* \tparam IndexIterator is a model of `ForwardIterator` with its value type being a `RandomAccessRange` of size 3 with an index type as `value_type`, e.g., `uint8_t`, `uint16_t` or int.
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* \tparam PointRange is a model of `RandomAccessRange`. Its value type needs to be compatible to PointMap or `Point_2` in the default case.
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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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* \tparam PointMap is a model of `ReadablePropertyMap` with its key type being the value type of `PointRange` and the value type being a `Point_2`.
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* The default is `Identity_property_map<typename PointRange::value_type>`.
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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_segment_primitive_2<Iterator,CacheDatum>`
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* \sa `AABB_segment_primitive_3<Iterator,CacheDatum>`
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* \sa `AABB_segment_triangle_2<Iterator,CacheDatum>`
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* \sa `AABB_segment_triangle_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 GeomTraits,
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class IndexIterator,
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class PointRange,
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class CacheDatum = Tag_false,
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class PointMap = Identity_property_map<typename PointRange::value_type>>
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class AABB_indexed_triangle_primitive_2
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#ifndef DOXYGEN_RUNNING
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: public AABB_primitive< IndexIterator,
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internal::Triangle_2_from_index_range_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>,
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internal::Point_from_indexed_triangle_2_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>,
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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< IndexIterator,
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internal::Triangle_2_from_index_range_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>,
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internal::Point_from_indexed_triangle_2_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>,
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Tag_true,
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CacheDatum > Base;
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public:
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///constructor from an iterator
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AABB_indexed_triangle_primitive_2(IndexIterator it, PointRange&) : Base(it) {}
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/// \internal
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static typename Base::Shared_data construct_shared_data(PointRange &range, PointMap &pmap = PointMap()) {
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return std::make_pair(
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internal::Triangle_2_from_index_range_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>(range.begin(), pmap),
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internal::Point_from_indexed_triangle_2_iterator_property_map<GeomTraits, IndexIterator, typename PointRange::iterator, PointMap>(range.begin(), pmap));
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}
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};
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} // end namespace CGAL
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#endif // CGAL_AABB_INDEXED_TRIANGLE_PRIMITIVE_2_H_
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