Boost C++ Libraries

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C++ Boost

make_biconnected_planar

template <typename Graph, typename PlanarEmbedding, typename EdgeIndexMap, typename AddEdgeVisitor>
void make_biconnected_planar(Graph& g, PlanarEmbedding embedding, EdgeIndexMap em, AddEdgeVisitor& vis);

A graph G is biconnected if, for every pair of vertices u,v in G, there is a cycle containing both u and v. Alternatively, a graph is biconnected if it is connected and cannot be made disconnected by removing any single vertex. make_biconnected_planar takes a connected planar graph g as input and adds zero or more edges to make g biconnected while preserving planarity.

The default behavior of make_biconnected_planar is to modify the graph g by calling add_edge(u,v,g) for every pair of vertices (u,v) where an edge needs to be added to make g biconnected. This behavior can be overriden by providing a vistor as the AddEdgeVisitor parameter. The only requirement for an AddEdgeVisitor is that it define a member function with the following signature:

template <typename Graph, typename Vertex>
void visit_vertex_pair(Vertex u, Vertex v, Graph& g);
This event point can also be used as a hook to update the underlying edge index map automatically as edges are added. See the documentation for the AddEdgeVisitor concept for more information.

Where Defined

boost/graph/make_biconnected_planar.hpp

Parameters

IN/OUT: Graph& g
An undirected graph. The graph type must be a model of Vertex List Graph, Incidence Graph, and a Mutable Graph
IN: PlanarEmbedding embedding
A model of PlanarEmbedding.
IN: EdgeIndexMap vm
A Readable Property Map that maps edges from g to distinct integers in the range [0, num_edges(g) )
Default: get(edge_index,g)
IN: AddEdgeVisitor
A model of AddEdgeVisitor .
Default: default_add_edge_visitor, a class defines visit_vertex_pair to dispatch its calls to add_edge.

Complexity

On a planar graph with n vertices, make_biconnected_planar runs in time O(n)

Example

examples/make_biconnected_planar.cpp

See Also

Planar Graphs in the Boost Graph Library

Copyright © 2007 Aaron Windsor ( aaron.windsor@gmail.com)