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Diffstat (limited to 'src/Coxeter_triangulation/include/gudhi/IO/output_meshes_to_medit.h')
| -rw-r--r-- | src/Coxeter_triangulation/include/gudhi/IO/output_meshes_to_medit.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/Coxeter_triangulation/include/gudhi/IO/output_meshes_to_medit.h b/src/Coxeter_triangulation/include/gudhi/IO/output_meshes_to_medit.h new file mode 100644 index 00000000..f69d8b29 --- /dev/null +++ b/src/Coxeter_triangulation/include/gudhi/IO/output_meshes_to_medit.h @@ -0,0 +1,154 @@ +/* This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT. + * See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details. + * Author(s): Siargey Kachanovich + * + * Copyright (C) 2019 Inria + * + * Modification(s): + * - YYYY/MM Author: Description of the modification + */ + +#ifndef IO_OUTPUT_MESHES_TO_MEDIT_H_ +#define IO_OUTPUT_MESHES_TO_MEDIT_H_ + +#include <gudhi/IO/Mesh_medit.h> + +#include <Eigen/Dense> + +#include <cstdlib> // for std::size_t +#include <fstream> // for std::ofstream +#include <vector> +#include <type_traits> // for std::enable_if +#include <tuple> // for std::get +#include <utility> // for std::make_pair + +namespace Gudhi { + +namespace coxeter_triangulation { + +using Vertex_points = Mesh_medit::Vertex_points; +using Mesh_elements = Mesh_medit::Mesh_elements; +using Scalar_field_range = Mesh_medit::Scalar_field_range; + +template <std::size_t I = 0, typename... Meshes> +typename std::enable_if<I == sizeof...(Meshes), void>::type fill_meshes(Vertex_points& vertex_points, + Mesh_elements& edges, Mesh_elements& triangles, + Mesh_elements& tetrahedra, + Scalar_field_range& triangles_scalar_range, + Scalar_field_range& tetrahedra_scalar_range, + std::size_t index, const Meshes&... meshes) {} + +template <std::size_t I = 0, typename... Meshes> +typename std::enable_if<I != sizeof...(Meshes), void>::type fill_meshes(Vertex_points& vertex_points, + Mesh_elements& edges, Mesh_elements& triangles, + Mesh_elements& tetrahedra, + Scalar_field_range& triangles_scalar_range, + Scalar_field_range& tetrahedra_scalar_range, + std::size_t index, const Meshes&... meshes) { + auto mesh = std::get<I>(std::forward_as_tuple(meshes...)); + for (const auto& v : mesh.vertex_points) vertex_points.push_back(v); + for (const auto& e : mesh.edges) { + std::vector<std::size_t> edge; + for (const auto& v_i : e.first) edge.push_back(v_i + index); + edges.emplace_back(edge, e.second); + } + for (const auto& t : mesh.triangles) { + std::vector<std::size_t> triangle; + for (const auto& v_i : t.first) triangle.push_back(v_i + index); + triangles.emplace_back(triangle, t.second); + } + for (const auto& t : mesh.tetrahedra) { + std::vector<std::size_t> tetrahedron; + for (const auto& v_i : t.first) tetrahedron.push_back(v_i + index); + tetrahedra.emplace_back(tetrahedron, t.second); + } + for (const auto& b : mesh.triangles_scalar_range) triangles_scalar_range.push_back(b); + for (const auto& b : mesh.tetrahedra_scalar_range) tetrahedra_scalar_range.push_back(b); + fill_meshes<I + 1, Meshes...>(vertex_points, edges, triangles, tetrahedra, triangles_scalar_range, + tetrahedra_scalar_range, index + mesh.vertex_points.size(), meshes...); +} + +/** \brief Outputs a text file with specified meshes that can be visualized in + * <a target="_blank" href="https://www.ljll.math.upmc.fr/frey/software.html">Medit</a>. + * + * @param[in] amb_d Ambient dimension. Can be 2 or 3. + * @param[in] file_name The name of the output file. + * @param[in] meshes A pack of meshes to be specified separated by commas. + * + * @ingroup coxeter_triangulation + */ +template <typename... Meshes> +void output_meshes_to_medit(std::size_t amb_d, std::string file_name, const Meshes&... meshes) { + Vertex_points vertex_points; + Mesh_elements edges, triangles, tetrahedra; + Scalar_field_range triangles_scalar_range, tetrahedra_scalar_range; + fill_meshes(vertex_points, edges, triangles, tetrahedra, triangles_scalar_range, tetrahedra_scalar_range, 0, + meshes...); + + std::ofstream ofs(file_name + ".mesh", std::ofstream::out); + std::ofstream ofs_bb(file_name + ".bb", std::ofstream::out); + + if (amb_d == 2) { + ofs << "MeshVersionFormatted 1\nDimension 2\n"; + ofs_bb << "2 1 "; + ofs << "Vertices\n" << vertex_points.size() << "\n"; + for (auto p : vertex_points) { + ofs << p[0] << " " << p[1] << " 2\n"; + } + ofs << "Edges " << edges.size() << "\n"; + for (auto e : edges) { + for (auto v : e.first) ofs << v << " "; + ofs << e.second << std::endl; + } + ofs << "Triangles " << triangles.size() << "\n"; + for (auto s : triangles) { + for (auto v : s.first) { + ofs << v << " "; + } + ofs << s.second << std::endl; + } + + ofs_bb << triangles_scalar_range.size() << " 1\n"; + for (auto& b : triangles_scalar_range) ofs_bb << b << "\n"; + + } else { + ofs << "MeshVersionFormatted 1\nDimension 3\n"; + ofs_bb << "3 1 "; + ofs << "Vertices\n" << vertex_points.size() << "\n"; + for (auto p : vertex_points) { + ofs << p[0] << " " << p[1] << " " << p[2] << " 2\n"; + } + ofs << "Edges " << edges.size() << "\n"; + for (auto e : edges) { + for (auto v : e.first) ofs << v << " "; + ofs << e.second << std::endl; + } + ofs << "Triangles " << triangles.size() << "\n"; + for (auto s : triangles) { + for (auto v : s.first) { + ofs << v << " "; + } + ofs << s.second << std::endl; + } + ofs << "Tetrahedra " << tetrahedra.size() << "\n"; + for (auto s : tetrahedra) { + for (auto v : s.first) { + ofs << v << " "; + } + ofs << s.second << std::endl; + } + + ofs_bb << triangles_scalar_range.size() + tetrahedra_scalar_range.size() << " 1\n"; + for (auto& b : triangles_scalar_range) ofs_bb << b << "\n"; + for (auto& b : tetrahedra_scalar_range) ofs_bb << b << "\n"; + } + + ofs.close(); + ofs_bb.close(); +} + +} // namespace coxeter_triangulation + +} // namespace Gudhi + +#endif |