79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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// Copyright (c) 2002 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) : Susan Hert
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#ifndef CGAL_CH_FUNCTION_OBJECTS_2_H
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#define CGAL_CH_FUNCTION_OBJECTS_2_H
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#include <CGAL/license/Convex_hull_2.h>
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#include <CGAL/enum.h>
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namespace CGAL {
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namespace internal {
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template <class R>
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class r_Less_dist_to_line
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{
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public:
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typedef bool result_type;
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typedef typename R::Point_2 Point;
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typedef typename R::Line_2 Line;
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r_Less_dist_to_line() : line_constructed( false )
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{ }
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bool operator()(const Point& a, const Point& b,
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const Point& c, const Point& d) const
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{
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if (!line_constructed)
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{
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line_constructed = true;
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l_ab = Line(a,b);
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}
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Comparison_result res = compare_signed_distance_to_line(l_ab, c, d);
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if ( res == SMALLER )
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{
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return true;
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}
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else if ( res == EQUAL )
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{
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return lexicographically_xy_smaller( c, d );
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}
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else
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{
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return false;
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}
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}
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private:
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mutable bool line_constructed;
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mutable Line l_ab;
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};
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} // namespace internal
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} //namespace CGAL
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#endif // CGAL_CH_FUNCTION_OBJECTS_2_H
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