Question

如何为使用add_edge_by_label在dijkstra_shortest_paths中使用的带标签的图形添加权重？我试图使用example 感谢

#include <boost/graph/adjacency_list.hpp>
#include <boost/graph/copy.hpp>
#include <boost/graph/labeled_graph.hpp>
#include <boost/graph/graph_utility.hpp>

struct NodeInfo1 { int i; };
struct EdgeInfo1 { int j; };

typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS, NodeInfo1, EdgeInfo1> AList;
typedef boost::labeled_graph<AList, std::string> Graph;

auto TestCopyGraph()
{
    std::string names[3] = { "A", "B", "C" };
      NodeInfo1 props[3] = { {11}, {22}, {33} };
    Graph grid(3, names, props);
    /*auto e =*/ add_edge_by_label("C", "B", EdgeInfo1{17}, grid);

    Graph g1 = grid; // just copy-construct
    return g1;
}

Answer 1

随时随地。在捆绑的j字段中？

auto weight_map = boost::get(&EdgeInfo1::j, g1);

在外部地图中？

std::map<Graph::edge_descriptor, double> weights;
auto weight_map = boost::make_assoc_property_map(weights);

根据文档直接或作为命名参数传递给dijkstra（或搜索我的答案以获取示例）。

label_graph中的权重

1 个答案: