On Fri, 14 Aug 2009, mcorbion@mobigis.fr wrote:
Ok so I still can't use the randomize property but I've done a workaround. I created an AbstractGraph class which has a m_Graph adjacency_list type of graph. And nodes uses the bundled property : struct City { int pos_X; int pos_Y; };
My workaround test function uses the property map given to randomly set the values, but it's still too specific :
template <typename Graph, typename BundProp,typename RandomGenerator> void AbstractGraph::test(bundle_property_map<Graph,unsigned int,BundProp,int> p_PMap, RandomGenerator& p_ewrg){
AbstractGraph::N_iterator l_NodeStart; AbstractGraph::N_iterator l_NodeEnd; AbstractGraph::GetNodes(l_NodeStart,l_NodeEnd);
for (; l_NodeStart != l_NodeEnd; ++l_NodeStart) { p_PMap[*l_NodeStart] = p_ewrg(); } }
called this way in the main :
mt19937 l_Gen(1988); boost::uniform_int<> RandRange(1,10); boost::variate_generator<boost::mt19937&, boost::uniform_int<> > ew2rg(l_Gen, RandRange);
typedef property_map<Graph, int(City::*)>::type t_PMapCity; t_PMapCity l_PMap=get(&City::pos_X,m_Graph); test<Graph,City>(l_PMap,ew2rg);
I would like to include the two line that generates the property_map from the main to the test function. I've tried this :
template <typename Graph, typename PropertyTagType,typename RandomGenerator> void AbstractGraph::test2( ??? p_PropertyTagName,RandomGenerator& p_ewrg){
typedef property_map<Graph, PropertyTagType>::type t_PMap; t_PMap l_PMap=get(PropertyTagName,m_Graph); AbstractGraph::N_iterator l_NodeStart; AbstractGraph::N_iterator l_NodeEnd; AbstractGraph::GetNodes(l_NodeStart,l_NodeEnd);
for (; l_NodeStart != l_NodeEnd; ++l_NodeStart) { p_PMap[*l_NodeStart] = p_ewrg(); } }
called this way :
test2<Graph,int(City::*)>(l_Gen, &City::pos_X);
But I can't figure any type for &City::pos_X in order to write the header for test2 allowing the function to work with float, char ...
The type of &City::pos_X should be "int City::*" (without the extra parentheses); however, argument deduction should pick that up for you automatically, both for this code and randomize_property. The ??? in test2 should be PropertyTagType, I believe. -- Jeremiah Willcock