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ROBLOX2016
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Library/boost/libs/graph/example/grid_graph_properties.cpp
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19 дек 2024, 19:11
19 дек 2024, 19:11
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//======================================================================= // Copyright 2012 David Doria // Authors: David Doria // // 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) //======================================================================= #include <iostream> #include <boost/array.hpp> #include <boost/graph/grid_graph.hpp> int main(int argc, char* argv[]) { // A 2D grid graph typedef boost::grid_graph< 2 > GraphType; // Create a 5x5 graph const unsigned int dimension = 5; boost::array< std::size_t, 2 > lengths = { { dimension, dimension } }; GraphType graph(lengths); // Get the index map of the grid graph typedef boost::property_map< GraphType, boost::vertex_index_t >::const_type indexMapType; indexMapType indexMap(get(boost::vertex_index, graph)); // Create a float for every node in the graph boost::vector_property_map< float, indexMapType > dataMap( num_vertices(graph), indexMap); // Associate the value 2.0 with the node at position (0,1) in the grid boost::graph_traits< GraphType >::vertex_descriptor v = { { 0, 1 } }; put(dataMap, v, 2.0f); // Get the data at the node at position (0,1) in the grid float retrieved = get(dataMap, v); std::cout << "Retrieved value: " << retrieved << std::endl; return 0; }