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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Mathieu Carrière
*
* Copyright (C) 2017 Inria
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gudhi/GIC.h>
#include <string>
#include <vector>
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 [-v] \n";
std::cerr << " i.e.: " << progName << " ../../data/points/human.off 2 -v \n";
exit(-1); // ----- >>
}
int main(int argc, char **argv) {
if ((argc != 3) && (argc != 4)) usage(argc, argv[0]);
using Point = std::vector<float>;
std::string off_file_name(argv[1]);
int coord = atoi(argv[2]);
bool verb = 0;
if (argc == 4) verb = 1;
// -----------------------------------------
// Init of a functional GIC from an OFF file
// -----------------------------------------
Gudhi::cover_complex::Cover_complex<Point> GIC;
GIC.set_verbose(verb);
bool check = GIC.read_point_cloud(off_file_name);
if (!check) {
std::cout << "Incorrect OFF file." << std::endl;
} else {
GIC.set_type("GIC");
GIC.set_color_from_coordinate(coord);
GIC.set_function_from_coordinate(coord);
GIC.set_graph_from_automatic_rips(Gudhi::Euclidean_distance());
GIC.set_automatic_resolution();
GIC.set_gain();
GIC.set_cover_from_function();
GIC.find_simplices();
GIC.compute_distribution(10);
GIC.compute_p_value();
GIC.plot_DOT();
Gudhi::Simplex_tree<> stree;
GIC.create_complex(stree);
// --------------------------------------------
// Display information about the functional GIC
// --------------------------------------------
if (verb) {
std::cout << "Functional GIC is of dimension " << stree.dimension() << " - " << stree.num_simplices()
<< " simplices - " << stree.num_vertices() << " vertices." << std::endl;
std::cout << "Iterator on functional GIC simplices" << std::endl;
for (auto f_simplex : stree.filtration_simplex_range()) {
for (auto vertex : stree.simplex_vertex_range(f_simplex)) {
std::cout << vertex << " ";
}
std::cout << std::endl;
}
}
}
return 0;
}
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