Requirements for a Facet

Definition

A facet optionally stores a pointer 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.

Types

Facet::Vertex
	corresponding vertex type.
Facet::Halfedge
	corresponding halfedge type.
Facet::Facet
	self.

Operations

Halfedge*	f.halfedge ()	an incident halfedge pointing to f.
const Halfedge*	f.halfedge ()
void	f.set_halfedge ( Halfedge* 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::Supports_facet_halfedge
	halfedge().