69 lines
1.4 KiB
C++
69 lines
1.4 KiB
C++
// Copyright (c) 1997-2007 Max-Planck-Institute Saarbruecken (Germany).
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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: https://github.com/CGAL/cgal/blob/v5.1/Nef_3/include/CGAL/Nef_nary_union_3.h $
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// $Id: Nef_nary_union_3.h a86712d 2020-06-07T15:25:18+02:00 Thomas Krijnen
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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) : Peter Hachenberger <hachenberger@mpi-sb.mpg.de>
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#ifndef CGAL_NEF_NARY_UNION_3_H
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#define CGAL_NEF_NARY_UNION_3_H
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#include <CGAL/license/Nef_3.h>
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#include <CGAL/disable_warnings.h>
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#include <list>
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namespace CGAL {
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template<class Polyhedron>
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class Nef_nary_union_3 {
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int inserted;
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std::list<Polyhedron> queue;
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typedef typename std::list<Polyhedron>::iterator pit;
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Polyhedron empty;
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public:
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Nef_nary_union_3() : inserted(0) {}
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void unite() {
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pit i1(queue.begin()), i2(i1);
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++i2;
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Polyhedron tmp(*i1 + *i2);
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queue.pop_front();
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queue.pop_front();
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queue.push_front(tmp);
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}
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void add_polyhedron(const Polyhedron& P) {
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queue.push_front(P);
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++inserted;
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for(int i=2;(inserted%i) == 0; i*=2) {
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unite();
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}
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}
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Polyhedron get_union() {
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if (queue.empty())
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return empty;
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while(queue.size() > 1)
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unite();
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inserted = 0;
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return queue.front();
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}
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};
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} //namespace CGAL
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#include <CGAL/enable_warnings.h>
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#endif // CGAL_NEF_NARY_UNION_H
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