125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
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// Copyright (c) 1997 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+
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//
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//
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// Author(s) : Mariette Yvinec
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#ifndef CGAL_TRIANGULATION_2_TRAITS_3_H
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#define CGAL_TRIANGULATION_2_TRAITS_3_H
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#include <CGAL/license/Triangulation_2.h>
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#include <CGAL/Point_3.h>
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#include <CGAL/Segment_3.h>
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#include <CGAL/Triangle_3.h>
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#include <CGAL/Kernel/global_functions_3.h>
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#include <CGAL/triangulation_assertions.h>
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namespace CGAL {
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template<class R>
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class Compare_yz_3
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{
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public:
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typedef typename R::Point_3 Point;
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Comparison_result operator() (Point p, Point q){
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Comparison_result r;
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r = CGAL::compare_y(p,q);
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if (r == EQUAL) r = CGAL::compare_z(p,q);
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return r;
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}
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};
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template <class R>
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class Side_of_oriented_circle_2_3
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{
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// 2d triangulation needs a side_of_oriented_circle
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// that in fact is a side_of_bounded_circle
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// meaning that
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// bounded side of circle = positive side
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public:
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typedef typename R::Point_3 Point;
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typedef typename R::Coplanar_side_of_bounded_circle_3
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Side_of_bounded_circle_2_3;
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Oriented_side operator() (const Point& p,
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const Point& q,
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const Point& r,
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const Point& s) {
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Side_of_bounded_circle_2_3 side;
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Bounded_side bs = side(p,q,r,s);
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return ( bs == ON_UNBOUNDED_SIDE) ? ON_NEGATIVE_SIDE :
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(bs == ON_BOUNDED_SIDE ) ? ON_POSITIVE_SIDE :
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ON_ORIENTED_BOUNDARY;
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}
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};
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template < class R >
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class Triangulation_2_traits_3
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{
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public:
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typedef R Rep;
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typedef typename Rep::Point_3 Point_2;
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typedef typename Rep::Segment_3 Segment_2;
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typedef typename Rep::Triangle_3 Triangle_2;
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typedef typename Rep::Compare_x_3 Compare_x_2;
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typedef Compare_yz_3<Rep> Compare_y_2;
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typedef typename Rep::Coplanar_orientation_3 Orientation_2;
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typedef Side_of_oriented_circle_2_3<Rep> Side_of_oriented_circle_2;
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typedef typename Rep::Construct_segment_3 Construct_segment_2;
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typedef typename Rep::Construct_triangle_3 Construct_triangle_2;
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// for compatibility with previous versions
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typedef Point_2 Point;
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typedef Segment_2 Segment;
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typedef Triangle_2 Triangle;
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Compare_x_2
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compare_x_2_object() const
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{ return Compare_x_2();}
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Compare_y_2
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compare_y_2_object() const
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{ return Compare_y_2();}
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Orientation_2
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orientation_2_object() const
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{ return Orientation_2();}
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Side_of_oriented_circle_2
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side_of_oriented_circle_2_object() const
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{return Side_of_oriented_circle_2();}
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Construct_segment_2 construct_segment_2_object() const
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{return Construct_segment_2();}
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Construct_triangle_2 construct_triangle_2_object() const
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{return Construct_triangle_2();}
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};
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} //namespace CGAL
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#endif // CGAL_TRIANGULATION_2_TRAITS_3_H
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