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在Boost Graph Library中将自定义属性添加到网格的顶点

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我在我的机器人项目中使用Boost Graph Library进行 Map 管理 . 我打算使用Boost Grid,我发现Boost Graph文档真的很难理解,所以我需要一些帮助 .

这是我创建网格并打印它的方式:

struct sampleVertex {
    int row;
    int col;
    bool occupied;
  };

  boost::array<std::size_t, 2> lengths = { { 3, 2 } };
  boost::grid_graph<2> gridD(lengths);
  boost::write_graphviz(fout, gridD);

现在,我想为顶点添加自定义属性,定义为结构 - 'sampleVertex' . 请向我展示一些代码片段或示例来执行此操作 . 我知道,捆绑的属性可以通过adjacency_list添加并手动创建网格顶点和连接边 . 我想知道,如果可以直接使用boost :: grid_graph来完成 . 提前致谢 .

1 回答

  • 4

    这是我可以提出的一个简单示例(它也使用输出中的属性):

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    #include <boost/graph/grid_graph.hpp>
    #include <boost/graph/properties.hpp>
    #include <boost/graph/graphviz.hpp>
    #include <iostream>
    
    struct sampleVertex {
        int row;
        int col;
        bool occupied;
        friend std::ostream& operator<<(std::ostream& os, sampleVertex& sv) {
            return os << "{" << sv.row << "," << sv.col << "," << sv.occupied << "}";
        }
        friend std::istream& operator>>(std::istream& is, sampleVertex& sv) {
            return is >> sv.row >> sv.col >> sv.occupied;
        }
    };
    
    
    int main() {
        boost::array<int, 2> lengths = { { 3, 2 } };
        using Graph  = boost::grid_graph<2, int>;
        using Traits = boost::graph_traits<Graph>;
        using IdMap  = boost::property_map<Graph, boost::vertex_index_t>::const_type;
    
        Graph gridD(lengths);
        IdMap indexMap(get(boost::vertex_index, gridD));
        // properties
        boost::vector_property_map<sampleVertex, IdMap> props(num_vertices(gridD), indexMap);
    
        // initialize
        for (int i = 0; i < 3; ++i)
            for (int j = 0; j < 2; ++j)
                put(props, Traits::vertex_descriptor {{i, j}}, sampleVertex{i,j,false});
    
        // print a property
        boost::dynamic_properties dp;
        dp.property("node_id", props);
        boost::write_graphviz_dp(std::cout, gridD, dp);
    }
    

    输出:

    digraph G {
    "{0,0,0}";
    "{1,0,0}";
    "{2,0,0}";
    "{0,1,0}";
    "{1,1,0}";
    "{2,1,0}";
    "{0,0,0}"->"{1,0,0}" ;
    "{1,0,0}"->"{2,0,0}" ;
    "{0,1,0}"->"{1,1,0}" ;
    "{1,1,0}"->"{2,1,0}" ;
    "{1,0,0}"->"{0,0,0}" ;
    "{2,0,0}"->"{1,0,0}" ;
    "{1,1,0}"->"{0,1,0}" ;
    "{2,1,0}"->"{1,1,0}" ;
    "{0,0,0}"->"{0,1,0}" ;
    "{1,0,0}"->"{1,1,0}" ;
    "{2,0,0}"->"{2,1,0}" ;
    "{0,1,0}"->"{0,0,0}" ;
    "{1,1,0}"->"{1,0,0}" ;
    "{2,1,0}"->"{2,0,0}" ;
    }
    

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