我有一个定义为
的提升图typedef boost::adjacency_list<boost::setS, boost::listS,
boost::undirectedS, CoordNode, CoordSegment> BGraph;
typedef boost::graph_traits<BGraph>::vertex_descriptor VertexDesc;
BGraph _graph;
我希望通过
了解同一图表的连通组件 int num = boost::connected_components(_graph, propMap);
我已经尝试使用
创建所需的可写属性映射(propMap)typedef std::map<VertexDesc, size_t> IndexMap;
IndexMap mapIndex;
boost::associative_property_map<IndexMap> propMap(mapIndex);
VertexIterator di, dj;
boost::tie(di, dj) = boost::vertices(_graph);
for(di; di != dj; ++di){
boost::put(propMap, (*di), 0);
}
但这不起作用;我得到编译错误。
如果顶点容器是vecS,那将更容易,因为一个简单的数组或向量就足够了。但是如果我将listS作为顶点容器,我应该传递给这个函数么?
如何创建必要的可写属性映射?有人能举个例子吗?
答案 0 :(得分:4)
作品!
typedef boost::adjacency_list
<boost::setS, boost::listS,
boost::undirectedS,
boost::no_property,
boost::no_property> Graph;
typedef boost::graph_traits<Graph>::vertex_iterator VertexIterator;
typedef boost::graph_traits<Graph>::vertex_descriptor VertexDesc;
typedef std::map<VertexDesc, size_t> VertexDescMap;
Graph graph;
...
VertexDescMap idxMap;
boost::associative_property_map<VertexDescMap> indexMap(idxMap);
VertexIterator di, dj;
boost::tie(di, dj) = boost::vertices(_graph);
for(int i = 0; di != dj; ++di,++i){
boost::put(indexMap, (*di), i);
}
std::map<VertexDesc, size_t> compMap;
boost::associative_property_map<VertexDescMap> componentMap(compMap);
boost::associative_property_map<VertexDescMap>& componentMap;
boost::connected_components(_graph, componentMap, boost::vertex_index_map(indexMap));