mirror of https://github.com/CGAL/cgal
248 lines
11 KiB
C++
248 lines
11 KiB
C++
// ============================================================================
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//
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// Copyright (c) 1997 The CGAL Consortium
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//
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// This software and related documentation is part of an INTERNAL release
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// of the Computational Geometry Algorithms Library (CGAL). It is not
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// intended for general use.
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//
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// ----------------------------------------------------------------------------
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//
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// release : $CGAL_Revision: $
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// release_date : $CGAL_Date: $
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//
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// file : include/CGAL/HalfedgeDS_face_base.h
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// package : HalfedgeDS 3.3 (27 Sep 2000)
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// chapter : Halfedge Data Structures
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//
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// revision : $Revision$
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// revision_date : $Date$
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//
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// author(s) : Lutz Kettner <kettner@mpi-sb.mpg.de>
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// maintainer :
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// coordinator : MPI Saarbruecken
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//
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// Halfedge Data Structure Base Classes for Faces.
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// ============================================================================
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#ifndef CGAL_HALFEDGEDS_FACE_BASE_H
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#define CGAL_HALFEDGEDS_FACE_BASE_H 1
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#ifndef CGAL_BASIC_H
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#include <CGAL/basic.h>
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#endif
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CGAL_BEGIN_NAMESPACE
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#if ! defined( CGAL_CFG_NO_PARTIAL_CLASS_TEMPLATE_SPECIALISATION) \
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&& ! defined( CGAL_CFG_SUNPRO_PARTIAL_SPEC_BUG)
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// We use Tag_false to indicate that no plane type is provided.
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template < class Refs, class T = Tag_true, class Pln = Tag_false>
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class HalfedgeDS_face_base;
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template < class Refs >
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class HalfedgeDS_face_base< Refs, Tag_false, Tag_false> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_face_base< Refs, Tag_false, Tag_false> Base;
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typedef Tag_false Supports_face_halfedge;
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typedef typename Refs::Vertex_handle Vertex_handle;
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typedef typename Refs::Vertex_const_handle Vertex_const_handle;
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typedef typename Refs::Halfedge_handle Halfedge_handle;
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typedef typename Refs::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Refs::Face_handle Face_handle;
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typedef typename Refs::Face_const_handle Face_const_handle;
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typedef typename Refs::Vertex Vertex;
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typedef typename Refs::Halfedge Halfedge;
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// Additional tags required by Polyhedron.
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typedef Tag_false Supports_face_plane;
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struct Plane_not_supported {};
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typedef Plane_not_supported Plane;
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// No longer required.
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// typedef Tag_false Supports_face_normal;
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};
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template < class Refs >
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class HalfedgeDS_face_base< Refs, Tag_true, Tag_false> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_face_base< Refs, Tag_true, Tag_false> Base;
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typedef Tag_true Supports_face_halfedge;
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typedef typename Refs::Vertex_handle Vertex_handle;
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typedef typename Refs::Vertex_const_handle Vertex_const_handle;
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typedef typename Refs::Halfedge_handle Halfedge_handle;
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typedef typename Refs::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Refs::Face_handle Face_handle;
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typedef typename Refs::Face_const_handle Face_const_handle;
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typedef typename Refs::Vertex Vertex;
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typedef typename Refs::Halfedge Halfedge;
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// Additional tags required by Polyhedron.
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typedef Tag_false Supports_face_plane;
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struct Plane_not_supported {};
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typedef Plane_not_supported Plane;
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// No longer required.
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//typedef Tag_false Supports_face_normal;
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private:
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Halfedge_handle hdg;
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public:
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Halfedge_handle halfedge() { return hdg; }
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Halfedge_const_handle halfedge() const { return hdg; }
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void set_halfedge( Halfedge_handle h) { hdg = h; }
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};
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template < class Refs, class Pln >
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class HalfedgeDS_face_base< Refs, Tag_false, Pln> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_face_base< Refs, Tag_false, Pln> Base;
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typedef Tag_false Supports_face_halfedge;
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typedef typename Refs::Vertex_handle Vertex_handle;
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typedef typename Refs::Vertex_const_handle Vertex_const_handle;
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typedef typename Refs::Halfedge_handle Halfedge_handle;
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typedef typename Refs::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Refs::Face_handle Face_handle;
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typedef typename Refs::Face_const_handle Face_const_handle;
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typedef typename Refs::Vertex Vertex;
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typedef typename Refs::Halfedge Halfedge;
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// Additional tags and types required by Polyhedron.
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typedef Tag_true Supports_face_plane;
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typedef Pln Plane;
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// No longer required.
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//typedef Tag_true Supports_face_normal;
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//typedef Trts Traits;
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//typedef typename Traits::Normal Normal;
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//typedef typename Traits::Plane Plane;
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private:
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Plane pln;
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public:
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HalfedgeDS_face_base() {}
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HalfedgeDS_face_base( const Plane& g) : pln(g) {}
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Plane& plane() { return pln; }
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const Plane& plane() const { return pln; }
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// No longer required.
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// Normal normal() const { return pln.orthogonal_vector();}
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};
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template < class Refs, class Pln >
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class HalfedgeDS_face_base< Refs, Tag_true, Pln> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_face_base< Refs, Tag_true, Pln> Base;
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typedef Tag_true Supports_face_halfedge;
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typedef typename Refs::Vertex_handle Vertex_handle;
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typedef typename Refs::Vertex_const_handle Vertex_const_handle;
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typedef typename Refs::Halfedge_handle Halfedge_handle;
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typedef typename Refs::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Refs::Face_handle Face_handle;
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typedef typename Refs::Face_const_handle Face_const_handle;
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typedef typename Refs::Vertex Vertex;
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typedef typename Refs::Halfedge Halfedge;
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// Additional tags and types required by Polyhedron.
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typedef Tag_true Supports_face_plane;
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typedef Pln Plane;
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// No longer required.
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//typedef Tag_true Supports_face_normal;
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//typedef Trts Traits;
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//typedef typename Traits::Normal Normal;
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//typedef typename Traits::Plane Plane;
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private:
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Halfedge_handle hdg;
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Plane pln;
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public:
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HalfedgeDS_face_base() {}
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HalfedgeDS_face_base( const Plane& g) : pln(g) {}
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Halfedge_handle halfedge() { return hdg; }
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Halfedge_const_handle halfedge() const { return hdg; }
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void set_halfedge( Halfedge_handle h) { hdg = h; }
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Plane& plane() { return pln; }
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const Plane& plane() const { return pln; }
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// No longer required.
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//Normal normal() const { return pln.orthogonal_vector();}
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};
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#else // ! defined( CGAL_CFG_NO_PARTIAL_CLASS_TEMPLATE_SPECIALISATION)
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// && ! defined( CGAL_CFG_SUNPRO_PARTIAL_SPEC_BUG)
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// Partial specialization doesn't work. We can factor out the
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// Plane parameter in a base class with full specialization
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// on 'Tag_false', but we cannot get rid of the halfedge reference.
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// So, we just waste the space and have it always.
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// Furthermore, is is likely to have a non-optimal memory
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// price-tag for the base class as well if it is the empty base
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// class for the plane type 'Tag_false', since empty structs probably
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// consume at least a byte, probably a word.
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// See HalfedgeDS_face_min_base.h for an alternative.
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// We use Tag_false to indicate that no plane type is provided.
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template < class Pln>
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struct I_HalfedgeDS_face_base_plane {
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typedef Tag_true Supports_plane;
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typedef Pln Plane;
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// No longer required.
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//typedef Trts Traits;
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//typedef typename Traits::Plane Plane;
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//typedef typename Traits::Normal Normal;
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Plane plane;
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I_HalfedgeDS_face_base_plane() {}
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I_HalfedgeDS_face_base_plane( const Plane& pl) : plane(pl) {}
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};
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template <>
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struct I_HalfedgeDS_face_base_plane<Tag_false> {
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typedef Tag_false Supports_plane;
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struct Plane_not_supported {};
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typedef Plane_not_supported Plane;
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// No longer required.
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//struct Normal_not_supported {};
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//typedef Normal_not_supported Normal;
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};
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template < class Refs, class T = Tag_true, class Pln = Tag_false>
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class HalfedgeDS_face_base : public I_HalfedgeDS_face_base_plane<Pln> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_face_base< Refs, T, Pln> Base;
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typedef Tag_true Supports_face_halfedge;
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typedef typename Refs::Vertex_handle Vertex_handle;
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typedef typename Refs::Vertex_const_handle Vertex_const_handle;
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typedef typename Refs::Halfedge_handle Halfedge_handle;
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typedef typename Refs::Halfedge_const_handle Halfedge_const_handle;
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typedef typename Refs::Face_handle Face_handle;
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typedef typename Refs::Face_const_handle Face_const_handle;
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typedef typename Refs::Vertex Vertex;
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typedef typename Refs::Halfedge Halfedge;
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// Additional tags and types required by Polyhedron.
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typedef I_HalfedgeDS_face_base_plane<Pln> Plane_base;
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typedef typename Plane_base::Supports_plane Supports_face_plane;
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typedef typename Plane_base::Plane Plane;
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// No longer required.
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//typedef typename Plane_base::Supports_plane Supports_face_normal;
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//typedef Trts Traits;
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//typedef typename Plane_base::Normal Normal;
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private:
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Halfedge_handle hdg;
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public:
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HalfedgeDS_face_base() {}
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HalfedgeDS_face_base( const Plane& g)
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: I_HalfedgeDS_face_base_plane<Pln>(g) {}
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Halfedge_handle halfedge() { return hdg; }
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Halfedge_const_handle halfedge() const { return hdg; }
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void set_halfedge( Halfedge_handle h){ hdg = h; }
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Plane& plane() { return Plane_base::plane; }
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const Plane& plane() const { return Plane_base::plane; }
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// No longer required.
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//Normal normal() const {
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// return Plane_base::plane.orthogonal_vector();
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//}
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};
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#endif // ! defined( CGAL_CFG_NO_PARTIAL_CLASS_TEMPLATE_SPECIALISATION)
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// && ! defined( CGAL_CFG_SUNPRO_PARTIAL_SPEC_BUG)
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CGAL_END_NAMESPACE
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#endif // CGAL_HALFEDGEDS_FACE_BASE_H //
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// EOF //
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