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// to construct a Delaunay_triangulation from a OFF file
#include "gudhi/Delaunay_triangulation_off_io.h"
#include "gudhi/Alpha_complex.h"
#include <stdio.h>
#include <stdlib.h>
#include <string>
void usage(char * const progName) {
std::cerr << "Usage: " << progName << " filename.off" << std::endl;
exit(-1); // ----- >>
}
int main(int argc, char **argv) {
if (argc != 2) {
std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
usage(argv[0]);
}
std::string off_file_name(argv[1]);
// ----------------------------------------------------------------------------
// Init of an alpha complex from an OFF file
// ----------------------------------------------------------------------------
Gudhi::alphacomplex::Alpha_complex<> alpha_complex_from_file(off_file_name);
// ----------------------------------------------------------------------------
// Display information about the alpha complex
// ----------------------------------------------------------------------------
std::cout << "Alpha complex is of dimension " << alpha_complex_from_file.dimension() <<
" - " << alpha_complex_from_file.num_simplices() << " simplices - " <<
alpha_complex_from_file.num_vertices() << " vertices." << std::endl;
std::cout << "Iterator on alpha complex simplices in the filtration order, with [filtration value]:" << std::endl;
for (auto f_simplex : alpha_complex_from_file.filtration_simplex_range()) {
std::cout << " ( ";
for (auto vertex : alpha_complex_from_file.simplex_vertex_range(f_simplex)) {
std::cout << vertex << " ";
}
std::cout << ") -> " << "[" << alpha_complex_from_file.filtration(f_simplex) << "] ";
std::cout << std::endl;
}
return 0;
}
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