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/* 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 <fstream>
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(std::make_pair(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(std::make_pair(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(std::make_pair(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 Medit.
*
* @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.
*/
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
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