CGAL 5.1.2 - Halfedge Data Structures
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The concept HalfedgeDSFace
defines the requirements for the local Face
type in the HalfedgeDS
concept. It is also required in the Face_wrapper<Refs,Traits>
member class template of an items class, see the HalfedgeDSItems
concept.
A face optionally stores a reference to an incident halfedge that points to the face. A type tag indicates whether the related member functions are supported. Figure figureHalfedgeDSOptionalMethods depicts the relationship between a halfedge and its incident halfedges, vertices, and faces.
For the protection of the integrity of the data structure classes such as CGAL::Polyhedron_3
are allowed to redefine the modifying member functions to be private. In order to make them accessible for the halfedge data structure they must be derived from a base class Base
where the modifying member functions are still public. (The protection can be bypassed by the user, but not by accident.)
HalfedgeDS<Traits,Items,Alloc>
HalfedgeDSItems
HalfedgeDSVertex
HalfedgeDSHalfedge
Types | |
typedef unspecified_type | HalfedgeDS |
instantiated HalfedgeDS ( \( \equiv\) Refs ). | |
typedef unspecified_type | Base |
base class that allows modifications. | |
typedef unspecified_type | Vertex |
model of HalfedgeDSVertex . | |
typedef unspecified_type | Halfedge |
model of HalfedgeDSHalfedge . | |
typedef unspecified_type | Vertex_handle |
handle to vertex. | |
typedef unspecified_type | Halfedge_handle |
handle to halfedge. | |
typedef unspecified_type | Face_handle |
handle to face. | |
typedef unspecified_type | Vertex_const_handle |
typedef unspecified_type | Halfedge_const_handle |
typedef unspecified_type | Face_const_handle |
typedef unspecified_type | Supports_face_halfedge |
CGAL::Tag_true or CGAL::Tag_false . | |
Creation | |
Face () | |
default constructor. | |
Operations available if Supports_face_halfedge == CGAL::Tag_true | |
Halfedge_handle | halfedge () |
Halfedge_const_handle | halfedge () const |
incident halfedge that points to the face. | |
void | set_halfedge (Halfedge_handle h) |
sets incident halfedge to h . | |