mirror of https://github.com/CGAL/cgal
208 lines
8.8 KiB
C++
208 lines
8.8 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_vertex_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 Class for Vertices.
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// ============================================================================
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#ifndef CGAL_HALFEDGEDS_VERTEX_BASE_H
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#define CGAL_HALFEDGEDS_VERTEX_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 point type is provided.
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template < class Refs, class T = Tag_true, class P = Tag_false>
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class HalfedgeDS_vertex_base;
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template < class Refs >
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class HalfedgeDS_vertex_base< Refs, Tag_false, Tag_false> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_vertex_base< Refs, Tag_false, Tag_false> Base;
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typedef Tag_false Supports_vertex_halfedge;
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typedef Tag_false Supports_vertex_point;
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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::Halfedge Halfedge;
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typedef typename Refs::Face Face;
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};
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template < class Refs>
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class HalfedgeDS_vertex_base< Refs, Tag_true, Tag_false> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_vertex_base< Refs, Tag_true, Tag_false> Base;
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typedef Tag_true Supports_vertex_halfedge;
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typedef Tag_false Supports_vertex_point;
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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::Halfedge Halfedge;
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typedef typename Refs::Face Face;
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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 P>
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class HalfedgeDS_vertex_base< Refs, Tag_false, P> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_vertex_base< Refs, Tag_false, P> Base;
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typedef Tag_false Supports_vertex_halfedge;
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typedef Tag_true Supports_vertex_point;
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typedef P Point;
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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::Halfedge Halfedge;
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typedef typename Refs::Face Face;
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private:
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Point p;
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public:
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HalfedgeDS_vertex_base() {}
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HalfedgeDS_vertex_base( const Point& pp) : p(pp) {}
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Point& point() { return p; }
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const Point& point() const { return p; }
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};
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template < class Refs, class P>
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class HalfedgeDS_vertex_base< Refs, Tag_true, P> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_vertex_base< Refs, Tag_true, P> Base;
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typedef Tag_true Supports_vertex_halfedge;
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typedef Tag_true Supports_vertex_point;
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typedef P Point;
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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::Halfedge Halfedge;
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typedef typename Refs::Face Face;
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private:
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Halfedge_handle hdg;
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Point p;
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public:
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HalfedgeDS_vertex_base() {}
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HalfedgeDS_vertex_base( const Point& pp) : p(pp) {}
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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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Point& point() { return p; }
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const Point& point() const { return p; }
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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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// Point 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, it 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 point 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 point type is provided.
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template <class Pt>
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struct I_HalfedgeDS_vertex_base_point {
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Pt point;
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I_HalfedgeDS_vertex_base_point() {}
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I_HalfedgeDS_vertex_base_point( const Pt& pt) : point(pt) {}
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typedef Tag_true Supports_point;
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typedef Pt Point;
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};
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template <>
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struct I_HalfedgeDS_vertex_base_point<Tag_false> {
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typedef Tag_false Supports_point;
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struct Point_not_supported {};
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typedef Point_not_supported Point;
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};
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template < class Refs, class T = Tag_true, class P = Tag_false>
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class HalfedgeDS_vertex_base : public I_HalfedgeDS_vertex_base_point<P> {
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public:
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typedef Refs HalfedgeDS;
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typedef HalfedgeDS_vertex_base< Refs, T, P> Base;
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typedef T Supports_vertex_halfedge;
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typedef I_HalfedgeDS_vertex_base_point<P> Point_base;
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typedef typename Point_base::Supports_point Supports_vertex_point;
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typedef typename Point_base::Point Point;
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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::Halfedge Halfedge;
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typedef typename Refs::Face Face;
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private:
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Halfedge_handle hdg;
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public:
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HalfedgeDS_vertex_base() {}
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HalfedgeDS_vertex_base( const Point& pp)
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: I_HalfedgeDS_vertex_base_point<P>(pp) {}
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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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Point& point() { return Point_base::point; }
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const Point& point() const { return Point_base::point; }
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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_VERTEX_BASE_H //
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// EOF //
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