// Copyright (c) 2005  INRIA Sophia-Antipolis (France) 
// All rights reserved.
//
// Authors : Monique Teillaud <Monique.Teillaud@sophia.inria.fr>
//           Sylvain Pion     <Sylvain.Pion@sophia.inria.fr>
//           Julien Hazebrouck
//           Damien Leroy
// 
// Partially supported by the IST Programme of the EU as a Shared-cost
// RTD (FET Open) Project under Contract No  IST-2000-26473 
// (ECG - Effective Computational Geometry for Curves and Surfaces) 
// and a STREP (FET Open) Project under Contract No  IST-006413 
// (ACS -- Algorithms for Complex Shapes)

#ifndef CGAL_LINE_ARC_3_H
#define CGAL_LINE_ARC_3_H

namespace CGAL {
  template <class SK> 
    class Line_arc_3
    : public SK::Kernel_base::Line_arc_3
  {
    
    typedef typename SK::RT                    RT;
    typedef typename SK::FT                    FT;
    typedef typename SK::Line_3                Line_3;
    typedef typename SK::Point_3               Point_3;
    typedef typename SK::Plane_3               Plane_3;
    typedef typename SK::Sphere_3              Sphere_3;
    typedef typename SK::Segment_3             Segment_3;
    typedef typename SK::Circular_arc_point_3  Circular_arc_point_3;
    typedef typename SK::Kernel_base::Line_arc_3 RLine_arc_3; 
   
  
  public:
    typedef  RLine_arc_3 Rep;
    typedef  SK   R; 
    
    const Rep& rep() const
      {
	return *this;
      }
    
    Rep& rep()
      {
	return *this;
      }
    
    Line_arc_3()
      : RLine_arc_3(typename R::Construct_line_arc_3()())
      {}

    Line_arc_3(const Line_3& l, 
               const Circular_arc_point_3& s, 
               const Circular_arc_point_3& t)
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s,t))
      {}

    Line_arc_3(const Line_3& l, 
               const Point_3& s, 
               const Circular_arc_point_3& t)
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s,t))
      {}

    Line_arc_3(const Line_3& l, 
               const Circular_arc_point_3& s, 
               const Point_3& t)
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s,t))
      {}

    Line_arc_3(const Line_3& l, 
               const Point_3& s, 
               const Point_3& t)
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s,t))
      {}

    Line_arc_3(const Segment_3 &s) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(s))
      {}

    Line_arc_3(const Line_3 &l,
               const Sphere_3 &s,
               bool less_xyz_first = true) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s,less_xyz_first))
    {}

    Line_arc_3(const Sphere_3 &s,
               const Line_3 &l,
               bool less_xyz_first = true) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(s,l,less_xyz_first))
    {}

    Line_arc_3(const Line_3 &l, 
               const Sphere_3 &s1, bool less_xyz_s1,
               const Sphere_3 &s2, bool less_xyz_s2) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,s1,less_xyz_s1,
                                                         s2,less_xyz_s2)) 
    {}

    Line_arc_3(const Sphere_3 &s1, bool less_xyz_s1,
               const Sphere_3 &s2, bool less_xyz_s2,
               const Line_3 &l) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(s1,less_xyz_s1,
                                                       s2,less_xyz_s2,l)) 
    {}

    Line_arc_3(const Line_3 &l,
	       const Plane_3 &p1,
	       const Plane_3 &p2) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(l,p1,p2))
    {}

    Line_arc_3(const Plane_3 &p1,
	       const Plane_3 &p2,
               const Line_3 &l) 
      : RLine_arc_3(typename R::Construct_line_arc_3()(p1,p2,l))
    {}

    Line_arc_3(const RLine_arc_3 &a)
     : RLine_arc_3(a)
      {}

    typename Qualified_result_of
    <typename R::Construct_circular_source_vertex_3,Line_arc_3>::type
    source() const
    {
      return typename R::Construct_circular_source_vertex_3()(*this);
    }

    typename Qualified_result_of
    <typename R::Construct_circular_target_vertex_3,Line_arc_3>::type
    target() const
    {
      return typename R::Construct_circular_target_vertex_3()(*this);
    }

    typename Qualified_result_of
    <typename R::Construct_circular_min_vertex_3,Line_arc_3>::type
    lower_xyz_extremity() const
    {
      return typename R::Construct_circular_min_vertex_3()(*this);
    }

    typename Qualified_result_of
    <typename R::Construct_circular_max_vertex_3,Line_arc_3>::type
    higher_xyz_extremity() const
    {
      return typename R::Construct_circular_max_vertex_3()(*this);
    }

    typename Qualified_result_of
    <typename R::Construct_supporting_line_3,Line_arc_3>::type
    supporting_line() const
    {
      return typename R::Construct_supporting_line_3()(*this);
    }

    Bbox_3 bbox() const
    { return typename R::Construct_bbox_3()(*this); }

  };

template < typename SK >
inline
bool
operator==(const Line_arc_3<SK> &p,
           const Line_arc_3<SK> &q)
{
  return SK().equal_3_object()(p, q);
}

template < typename SK >
inline
bool
operator!=(const Line_arc_3<SK> &p,
           const Line_arc_3<SK> &q)
{
  return ! (p == q);
}



}

#endif