135 lines
4.8 KiB
C++
Executable File
135 lines
4.8 KiB
C++
Executable File
// Copyright (c) 1999 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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// 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+
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//
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//
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// Author(s) : Stefan Schirra
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#ifndef CGAL_CONVEXITY_CHECK_2_H
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#define CGAL_CONVEXITY_CHECK_2_H
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#include <CGAL/license/Convex_hull_2.h>
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#include <CGAL/basic.h>
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#include <iterator>
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namespace CGAL {
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// returns true, if the point elements in [|first|,|last|) form a
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// counterclockwise oriented strongly convex polygon. Strongly means,
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// there are no three collinear points.
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// {\sc traits}: uses |Traits::Left_turn_2|, |Traits::Equal_2| and |Traits::Less_xy_2|.
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template <class ForwardIterator, class Traits>
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bool
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is_ccw_strongly_convex_2( ForwardIterator first, ForwardIterator last,
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const Traits& ch_traits);
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template <class ForwardIterator>
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inline
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bool
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is_ccw_strongly_convex_2( ForwardIterator first, ForwardIterator last )
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{
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typedef std::iterator_traits<ForwardIterator> ITraits;
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typedef typename ITraits::value_type value_type;
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typedef CGAL::Kernel_traits<value_type> KTraits;
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typedef typename KTraits::Kernel Kernel;
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return is_ccw_strongly_convex_2( first, last, Kernel());
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}
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// returns true, if the point elements in [|first|,|last|) form a
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// clockwise oriented strongly convex polygon. Strongly means, there are
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// no three collinear points.
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// {\sc traits}: uses |Traits::Left_turn_2|, |Traits::Equal_2| and |Traits::Less_xy_2|.
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template <class ForwardIterator, class Traits>
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bool
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is_cw_strongly_convex_2( ForwardIterator first, ForwardIterator last,
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const Traits& ch_traits);
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template <class ForwardIterator>
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inline
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bool
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is_cw_strongly_convex_2( ForwardIterator first, ForwardIterator last )
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{
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typedef std::iterator_traits<ForwardIterator> ITraits;
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typedef typename ITraits::value_type value_type;
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typedef CGAL::Kernel_traits<value_type> KTraits;
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typedef typename KTraits::Kernel Kernel;
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return is_cw_strongly_convex_2( first, last, Kernel());
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}
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// returns true, if all points in [|first1|,|last1|) are
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// not right of the lines defined by consecutive points in the range
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// [|first2|,|last2|), where the range is considered as a cycle.
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// {\sc traits}: uses |Traits::Left_turn_2|.
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template <class ForwardIterator1, class ForwardIterator2, class Traits>
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bool
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ch_brute_force_check_2(ForwardIterator1 first1, ForwardIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2,
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const Traits& ch_traits);
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template <class ForwardIterator1, class ForwardIterator2>
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inline
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bool
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ch_brute_force_check_2(ForwardIterator1 first1, ForwardIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2)
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{
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typedef std::iterator_traits<ForwardIterator1> ITraits;
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typedef typename ITraits::value_type value_type;
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typedef CGAL::Kernel_traits<value_type> KTraits;
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typedef typename KTraits::Kernel Kernel;
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return ch_brute_force_check_2( first1, last1, first2, last2, Kernel() );
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}
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// returns true, if all points in [|first1|,|last1|) are
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// not right of the lines defined by consecutive points in the range
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// [|first2|,|last2|).
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// {\sc traits}: uses |Traits::Left_turn_2|.
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template <class ForwardIterator1, class ForwardIterator2, class Traits>
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bool
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ch_brute_force_chain_check_2(ForwardIterator1 first1,
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ForwardIterator1 last1,
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ForwardIterator2 first2,
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ForwardIterator2 last2,
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const Traits& ch_traits);
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template <class ForwardIterator1, class ForwardIterator2>
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inline
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bool
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ch_brute_force_chain_check_2(ForwardIterator1 first1, ForwardIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2)
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{
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typedef std::iterator_traits<ForwardIterator1> ITraits;
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typedef typename ITraits::value_type value_type;
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typedef CGAL::Kernel_traits<value_type> KTraits;
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typedef typename KTraits::Kernel Kernel;
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return ch_brute_force_chain_check_2( first1, last1, first2, last2,
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Kernel());
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}
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} //namespace CGAL
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#include <CGAL/Convex_hull_2/convexity_check_2_impl.h>
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#endif // CGAL_CONVEXITY_CHECK_2_H
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