mirror of https://github.com/CGAL/cgal
126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
// Copyright (c) 2009 INRIA Sophia-Antipolis (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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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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
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//
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//
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// Author(s) : Stéphane Tayeb, Pierre Alliez
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//
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#ifndef AABB_TRIANGULATION_3_TRIANGLE_PRIMITIVE_H_
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#define AABB_TRIANGULATION_3_TRIANGLE_PRIMITIVE_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 <boost/utility/enable_if.hpp>
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#include <boost/type_traits/is_same.hpp>
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namespace CGAL {
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// \ingroup PkgAABBTreeRef
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// Primitive type that wraps a facet handle of a CGAL::Triangulation_3,
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// which is used as id, and allows the construction of the datum on
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// the fly. Since only the facet handle is stored in this primitive,
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// the TriangleMesh from which the AABB tree is built should not be
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// deleted while the AABB tree is in use.
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//
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// \cgalModels `AABBPrimitive`
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// \tparam GeomTraits must provides a \c %Point_3
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// type, used as \c Point, and a \c %Triangle_3 type, used as \c
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// Datum and constructible from three arguments of type \c
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// Point.
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// \tparam Tr must be a
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// \c CGAL::Triangulation_3 whose points have type \c Point.
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//
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// \sa `AABBPrimitive`
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template<typename GeomTraits, typename Tr>
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class AABB_triangulation_3_triangle_primitive
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{
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public:
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typedef typename GeomTraits::Point_3 Point;
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// \name Types
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// @{
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// Id type.
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typedef typename Tr::Facet Id;
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// Geometric data type.
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typedef typename GeomTraits::Triangle_3 Datum;
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// @}
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// Self
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typedef AABB_triangulation_3_triangle_primitive<GeomTraits, Tr> Self;
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// Constructors
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AABB_triangulation_3_triangle_primitive() {}
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AABB_triangulation_3_triangle_primitive(const AABB_triangulation_3_triangle_primitive& primitive)
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{
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m_facet = primitive.id();
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}
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AABB_triangulation_3_triangle_primitive(const Id& handle)
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: m_facet(handle) { }
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AABB_triangulation_3_triangle_primitive(const Id* ptr)
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: m_facet(*ptr) { }
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template <class Iterator>
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AABB_triangulation_3_triangle_primitive( Iterator it,
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typename boost::enable_if<
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boost::is_same<Id,typename Iterator::value_type>
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>::type* =0
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) : m_facet(*it) { }
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// Default destructor, copy constructor and assignment operator are ok
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// Returns by constructing on the fly the geometric datum wrapped by the primitive
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Datum datum() const
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{
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typename GeomTraits::Construct_point_3 cp =
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GeomTraits().construct_point_3_object();
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int i = m_facet.second;
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const Point& a = cp(m_facet.first->vertex((i+1) &3)->point());
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const Point& b = cp(m_facet.first->vertex((i+2) &3)->point());
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const Point& c = cp(m_facet.first->vertex((i+3) &3)->point());
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return Datum(a,b,c);
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}
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// Returns a point on the primitive
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Point reference_point() const
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{
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typename GeomTraits::Construct_point_3 cp =
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GeomTraits().construct_point_3_object();
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return cp(m_facet.first->vertex((m_facet.second +1) &3)->point());
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}
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// Returns the identifier
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const Id& id() const { return m_facet; }
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Id& id() { return m_facet; }
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private:
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// The id, here a Tr::Facet
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Id m_facet;
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}; // end class AABB_triangulation_3_triangle_primitive
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} // end namespace CGAL
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#include <CGAL/enable_warnings.h>
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#endif // AABB_TRIANGULATION_3_TRIANGLE_PRIMITIVE_H_
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