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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\graph\make_connected.hpp
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//======================================================================= // Copyright 2007 Aaron Windsor // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) //======================================================================= #ifndef __MAKE_CONNECTED_HPP__ #define __MAKE_CONNECTED_HPP__ #include
#include
//for next #include
//for tie #include
#include
#include
#include
#include
namespace boost { template
void make_connected(Graph& g, VertexIndexMap vm, AddEdgeVisitor& vis) { typedef typename graph_traits
::vertex_iterator vertex_iterator_t; typedef typename graph_traits
::vertex_descriptor vertex_t; typedef typename graph_traits
::vertices_size_type v_size_t; typedef iterator_property_map< typename std::vector
::iterator, VertexIndexMap > vertex_to_v_size_map_t; std::vector
component_vector(num_vertices(g)); vertex_to_v_size_map_t component(component_vector.begin(), vm); std::vector
vertices_by_component(num_vertices(g)); v_size_t num_components = connected_components(g, component); if (num_components < 2) return; vertex_iterator_t vi, vi_end; tie(vi,vi_end) = vertices(g); std::copy(vi, vi_end, vertices_by_component.begin()); bucket_sort(vertices_by_component.begin(), vertices_by_component.end(), component, num_components ); typedef typename std::vector
::iterator vec_of_vertices_itr_t; vec_of_vertices_itr_t ci_end = vertices_by_component.end(); vec_of_vertices_itr_t ci_prev = vertices_by_component.begin(); if (ci_prev == ci_end) return; for(vec_of_vertices_itr_t ci = next(ci_prev); ci != ci_end; ci_prev = ci, ++ci ) { if (component[*ci_prev] != component[*ci]) vis.visit_vertex_pair(*ci_prev, *ci, g); } } template
inline void make_connected(Graph& g, VertexIndexMap vm) { default_add_edge_visitor vis; make_connected(g, vm, vis); } template
inline void make_connected(Graph& g) { make_connected(g, get(vertex_index,g)); } } // namespace boost #endif //__MAKE_CONNECTED_HPP__
make_connected.hpp
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