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#include <gudhi/GIC.h>
void usage(int nbArgs, char * const progName) {
std::cerr << "Error: Number of arguments (" << nbArgs << ") is not correct\n";
std::cerr << "Usage: " << progName << " filename.off threshold function resolution gain [ouput_file.txt]\n";
std::cerr << " i.e.: " << progName << " ../../data/points/test.off 1.5 test_cov \n";
exit(-1); // ----- >>
}
int main(int argc, char **argv) {
if ((argc != 6) && (argc != 7)) usage(argc, (argv[0] - 1));
std::string off_file_name(argv[1]);
double threshold = atof(argv[2]);
std::string function_file_name(argv[3]);
double resolution = atof(argv[4]);
double gain = atof(argv[5]);
// Type definitions
using Graph_t = boost::adjacency_list < boost::vecS, boost::vecS, boost::undirectedS,\
boost::property < vertex_filtration_t, Filtration_value >,\
boost::property < edge_filtration_t, Filtration_value > >;
// ----------------------------------------------------------------------------
// Init of a graph induced complex from an OFF file
// ----------------------------------------------------------------------------
Gudhi::graph_induced_complex::Graph_induced_complex GIC;
GIC.set_graph_from_rips(threshold, off_file_name);
GIC.set_cover_from_function(function_file_name,resolution,gain,0);
GIC.find_GIC_simplices();
Simplex_tree stree; GIC.create_complex(stree);
std::streambuf* streambufffer;
std::ofstream ouput_file_stream;
if (argc == 7) {
ouput_file_stream.open(std::string(argv[4]));
streambufffer = ouput_file_stream.rdbuf();
} else {
streambufffer = std::cout.rdbuf();
}
std::ostream output_stream(streambufffer);
// ----------------------------------------------------------------------------
// Display information about the graph induced complex
// ----------------------------------------------------------------------------
output_stream << "Graph induced complex is of dimension " << stree.dimension() <<
" - " << stree.num_simplices() << " simplices - " <<
stree.num_vertices() << " vertices." << std::endl;
output_stream << "Iterator on graph induced complex simplices" << std::endl;
for (auto f_simplex : stree.filtration_simplex_range()) {
for (auto vertex : stree.simplex_vertex_range(f_simplex)) {
output_stream << vertex << " ";
}
output_stream << std::endl;
}
ouput_file_stream.close();
return 0;
}
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