122 lines
3.9 KiB
C++
122 lines
3.9 KiB
C++
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//=======================================================================
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// Copyright 2007 Aaron Windsor
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//=======================================================================
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#ifndef __MAKE_BICONNECTED_PLANAR_HPP__
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#define __MAKE_BICONNECTED_PLANAR_HPP__
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#include <boost/config.hpp>
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#include <boost/tuple/tuple.hpp> //for tie
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#include <boost/graph/biconnected_components.hpp>
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#include <boost/property_map/property_map.hpp>
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#include <vector>
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#include <iterator>
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#include <algorithm>
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#include <boost/graph/planar_detail/add_edge_visitors.hpp>
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namespace boost
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{
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template <typename Graph,
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typename PlanarEmbedding,
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typename EdgeIndexMap,
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typename AddEdgeVisitor
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>
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void make_biconnected_planar(Graph& g,
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PlanarEmbedding embedding,
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EdgeIndexMap em,
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AddEdgeVisitor& vis
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)
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{
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typedef typename graph_traits<Graph>::vertex_descriptor vertex_t;
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typedef typename graph_traits<Graph>::edge_descriptor edge_t;
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typedef typename graph_traits<Graph>::edges_size_type edge_size_t;
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typedef typename
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property_traits<PlanarEmbedding>::value_type embedding_value_t;
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typedef typename embedding_value_t::const_iterator embedding_iterator_t;
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typedef iterator_property_map
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<std::vector<std::size_t>::iterator, EdgeIndexMap> component_map_t;
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edge_size_t n_edges(num_edges(g));
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std::vector<vertex_t> articulation_points;
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std::vector<edge_size_t> component_vector(n_edges);
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component_map_t component_map(component_vector.begin(), em);
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biconnected_components(g, component_map,
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std::back_inserter(articulation_points));
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typename std::vector<vertex_t>::iterator ap, ap_end;
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ap_end = articulation_points.end();
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for(ap = articulation_points.begin(); ap != ap_end; ++ap)
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{
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vertex_t v(*ap);
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embedding_iterator_t pi = embedding[v].begin();
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embedding_iterator_t pi_end = embedding[v].end();
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edge_size_t previous_component(n_edges + 1);
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vertex_t previous_vertex = graph_traits<Graph>::null_vertex();
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for(; pi != pi_end; ++pi)
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{
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edge_t e(*pi);
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vertex_t e_source(source(e,g));
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vertex_t e_target(target(e,g));
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//Skip self-loops and parallel edges
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if (e_source == e_target || previous_vertex == e_target)
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continue;
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vertex_t current_vertex = e_source == v ? e_target : e_source;
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edge_size_t current_component = component_map[e];
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if (previous_vertex != graph_traits<Graph>::null_vertex() &&
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current_component != previous_component)
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{
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vis.visit_vertex_pair(current_vertex, previous_vertex, g);
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}
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previous_vertex = current_vertex;
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previous_component = current_component;
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}
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}
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}
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template <typename Graph,
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typename PlanarEmbedding,
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typename EdgeIndexMap
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>
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inline void make_biconnected_planar(Graph& g,
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PlanarEmbedding embedding,
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EdgeIndexMap em
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)
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{
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default_add_edge_visitor vis;
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make_biconnected_planar(g, embedding, em, vis);
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}
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template <typename Graph,
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typename PlanarEmbedding
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>
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inline void make_biconnected_planar(Graph& g, PlanarEmbedding embedding)
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{
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make_biconnected_planar(g, embedding, get(edge_index,g));
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}
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} // namespace boost
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#endif //__MAKE_BICONNECTED_PLANAR_HPP__
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