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Diffstat (limited to 'src/Bitmap_cubical_complex/utilities/Bitmap_cubical_complex_periodic_boundary_conditions.cpp')
-rw-r--r-- | src/Bitmap_cubical_complex/utilities/Bitmap_cubical_complex_periodic_boundary_conditions.cpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/Bitmap_cubical_complex/utilities/Bitmap_cubical_complex_periodic_boundary_conditions.cpp b/src/Bitmap_cubical_complex/utilities/Bitmap_cubical_complex_periodic_boundary_conditions.cpp new file mode 100644 index 00000000..c812cb3a --- /dev/null +++ b/src/Bitmap_cubical_complex/utilities/Bitmap_cubical_complex_periodic_boundary_conditions.cpp @@ -0,0 +1,82 @@ +/* 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): Pawel Dlotko + * + * Copyright (C) 2015 INRIA Saclay (France) + * + * 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/reader_utils.h> +#include <gudhi/Bitmap_cubical_complex.h> +#include <gudhi/Bitmap_cubical_complex_periodic_boundary_conditions_base.h> +#include <gudhi/Persistent_cohomology.h> + +// standard stuff +#include <iostream> +#include <sstream> +#include <vector> +#include <string> + +int main(int argc, char** argv) { + std::cout + << "This program computes persistent homology, by using " + << "Bitmap_cubical_complex_periodic_boundary_conditions class, of cubical complexes provided in text files in " + << "Perseus style (the only numbered in the first line is a dimension D of a bitmap. In the lines I between 2 " + << "and D+1 there are numbers of top dimensional cells in the direction I. Let N denote product of the numbers " + << "in the lines between 2 and D. In the lines D+2 to D+2+N there are filtrations of top dimensional cells. We " + << "assume that the cells are in the lexicographical order. See CubicalOneSphere.txt or CubicalTwoSphere.txt for" + << " example.\n" + << std::endl; + + if (argc != 2) { + std::cerr << "Wrong number of parameters. Please provide the name of a file with a Perseus style bitmap at " + << "the input. The program will now terminate.\n"; + return 1; + } + + typedef Gudhi::cubical_complex::Bitmap_cubical_complex_periodic_boundary_conditions_base<double> Bitmap_base; + typedef Gudhi::cubical_complex::Bitmap_cubical_complex<Bitmap_base> Bitmap_cubical_complex; + + Bitmap_cubical_complex b(argv[1]); + + typedef Gudhi::persistent_cohomology::Field_Zp Field_Zp; + typedef Gudhi::persistent_cohomology::Persistent_cohomology<Bitmap_cubical_complex, Field_Zp> Persistent_cohomology; + // Compute the persistence diagram of the complex + Persistent_cohomology pcoh(b, true); + + int p = 11; + double min_persistence = 0; + pcoh.init_coefficients(p); // initializes the coefficient field for homology + pcoh.compute_persistent_cohomology(min_persistence); + + std::string output_file_name(argv[1]); + output_file_name += "_persistence"; + + std::size_t last_in_path = output_file_name.find_last_of("/\\"); + + if (last_in_path != std::string::npos) { + output_file_name = output_file_name.substr(last_in_path + 1); + } + + std::ofstream out(output_file_name.c_str()); + pcoh.output_diagram(out); + out.close(); + + std::cout << "Result in file: " << output_file_name << "\n"; + + return 0; +} |