Requirements for Facet_base

Definition

A facet optionally stores a reference to an incident halfedge that points to the facet. Type tags indicate whether this member function is supported. Figure  depicts the relationship between a halfedge and its incident halfedges, vertices, and facets.

Creation

Facet_base f;
	default constructor.
Facet_base f ( const Facet&);
	copy constructor.

Operations

void*	f.halfedge ()	an incident halfedge pointing to f.
const void*	f.halfedge () const
void	f.set_halfedge ( void* h)

Types for Tagging Optional Features

The nested type below is either equal to Tag_true or Tag_false, depending on whether the named member function is supported or not.

Facet_base::Supports_facet_halfedge
	halfedge().