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CGAL 4.6.1 - CGAL and the Boost Graph Library
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HalfedgeListGraph Concept Reference
Concepts

Definition

The concept HalfedgeListGraph refines the concept HalfedgeGraph and adds the requirements for traversal of all halfedges in the graph.

Refines:
HalfedgeGraph
Has Models:

CGAL::Polyhedron_3

CGAL::Surface_mesh

Notations

G
A type that is a model of HalfedgeListGraph.
g
An object of type G.

Associated Types

Type Description
boost::graph_traits<G>::halfedge_iterator A BidirectionalIterator over all halfedges in a graph. Must be DefaultConstructible, Assignable, EqualityComparable.
boost::graph_traits<G>::halfedges_size_type A size type.

Valid Expressions

Expression Returns Description
num_halfedges(g) halfedges_size_type An upper bound of the number of halfedges of the graph.
halfedges(g) std::pair<halfedge_iterator,halfedge_iterator> An iterator range over the halfedges of the graph.
Attention
num_halfedges() may return a number larger than std::distance(halfedges(g).first,halfedges(g).second). This is the case for implementations only marking halfedges deleted in the halfedge container.