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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 coordinate \n";
std::cerr << " i.e.: " << progName << " ../../../../data/points/COIL_database/lucky_cat.off ../../../../data/points/COIL_database/lucky_cat_PCA1 --v \n";
exit(-1); // ----- >>
}
int main(int argc, char **argv) {
if ((argc != 3) && (argc != 4)) usage(argc, (argv[0] - 1));
std::string off_file_name(argv[1]);
std::string func_file_name = argv[2];
bool verb = 0; if(argc == 4) verb = 1;
// ---------------------------------------
// Init of a Mapper Delta from an OFF file
// ---------------------------------------
Gudhi::graph_induced_complex::Graph_induced_complex GIC;
GIC.set_verbose(verb);
GIC.read_point_cloud(off_file_name);
GIC.set_color_from_file(func_file_name);
GIC.set_function_from_file(func_file_name);
GIC.set_graph_from_automatic_rips();
GIC.set_automatic_resolution_for_GICMAP(); GIC.set_gain();
GIC.set_cover_from_function(1);
GIC.find_GICMAP_simplices_with_functional_minimal_cover();
GIC.plot_with_KeplerMapper();
Simplex_tree stree; GIC.create_complex(stree);
std::streambuf* streambufffer = std::cout.rdbuf();
std::ostream output_stream(streambufffer);
// ------------------------------------------
// Display information about the Mapper Delta
// ------------------------------------------
if(verb){
output_stream << "Mapper Delta is of dimension " << stree.dimension() <<
" - " << stree.num_simplices() << " simplices - " <<
stree.num_vertices() << " vertices." << std::endl;
output_stream << "Iterator on Mapper Delta 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;
}
}
return 0;
}
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