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// Copyright (c) 2012 GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1.1/SMDS_3/include/CGAL/IO/File_tetgen.h $
// $Id: include/CGAL/IO/File_tetgen.h 08b27d3db14 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Laurent Rineau
#ifndef CGAL_IO_FILE_TETGEN_H
#define CGAL_IO_FILE_TETGEN_H
#include <CGAL/license/SMDS_3.h>
#include <CGAL/Time_stamper.h>
#include <CGAL/IO/File_medit.h>
#include <CGAL/utility.h>
#include <fstream>
#include <iostream>
#include <string>
namespace CGAL {
namespace SMDS_3 {
template <class C3T3, bool rebind, bool no_patch>
void
output_to_tetgen(std::string filename,
const C3T3& c3t3)
{
#ifdef CGAL_MESH_3_IO_VERBOSE
std::cerr << "Output to tetgen:\n";
#endif
typedef Medit_pmap_generator<C3T3,Renumber_subdomain_indices(rebind),Facet_indices(no_patch)> Generator;
typedef typename Generator::Cell_pmap Cell_pmap;
typedef typename Generator::Facet_pmap Facet_pmap;
typedef typename Generator::Facet_pmap_twice Facet_pmap_twice;
typedef typename Generator::Vertex_pmap Vertex_pmap;
Cell_pmap cell_pmap(c3t3);
Facet_pmap facet_pmap(c3t3,cell_pmap);
Facet_pmap_twice facet_pmap_twice(c3t3,cell_pmap);
Vertex_pmap vertex_pmap(c3t3,cell_pmap,facet_pmap);
output_to_tetgen(filename,
c3t3,
vertex_pmap,
facet_pmap,
cell_pmap,
facet_pmap_twice,
Generator().print_twice());
#ifdef CGAL_MESH_3_IO_VERBOSE
std::cerr << "done.\n";
#endif
}
template <class C3T3,
class Vertex_index_property_map,
class Facet_index_property_map,
class Facet_index_property_map_twice,
class Cell_index_property_map>
void
output_to_tetgen(std::string filename,
const C3T3& c3t3,
const Vertex_index_property_map& /* vertex_pmap */,
const Facet_index_property_map& /* facet_pmap */,
const Cell_index_property_map& /* cell_pmap */,
const Facet_index_property_map_twice& /* facet_twice_pmap */ = Facet_index_property_map_twice(),
const bool /* print_each_facet_twice */ = false)
{
typedef typename C3T3::Triangulation Tr;
typedef typename C3T3::Facets_in_complex_iterator Facet_iterator;
typedef typename C3T3::Cells_in_complex_iterator Cell_iterator;
typedef typename Tr::Finite_vertices_iterator Finite_vertices_iterator;
typedef typename Tr::Vertex_handle Vertex_handle;
typedef typename Tr::Cell_handle Cell_handle;
typedef typename Tr::Weighted_point Weighted_point;
typedef typename Tr::Facet Facet;
typedef CGAL::Hash_handles_with_or_without_timestamps Hash_fct;
const Tr& tr = c3t3.triangulation();
boost::unordered_map<Vertex_handle, std::size_t, Hash_fct> V;
//-------------------------------------------------------
// File output
//-------------------------------------------------------
//-------------------------------------------------------
// nodes
//-------------------------------------------------------
std::string node_filename = filename + ".node";
std::ofstream node_stream(node_filename.c_str());
node_stream << std::setprecision(17);
node_stream << tr.number_of_vertices() << " 3 0 0" << std::endl;
std::size_t vert_counter = 0;
for(Finite_vertices_iterator
vit = tr.finite_vertices_begin(),
end = tr.finite_vertices_end();
vit != end; ++vit)
{
const Weighted_point& p = tr.point(vit);
const double x = CGAL::to_double(p.x());
const double y = CGAL::to_double(p.y());
const double z = CGAL::to_double(p.z());
V[vit] = ++vert_counter;
node_stream << vert_counter << " " << x << " " << y << " " << z;
node_stream << std::endl;
}
node_stream.close();
//-------------------------------------------------------
// Elements
//-------------------------------------------------------
std::string elem_filename = filename + ".ele";
std::ofstream elem_stream(elem_filename.c_str());
elem_stream << std::setprecision(17);
elem_stream << c3t3.number_of_cells_in_complex() << " 4 0" << std::endl;
std::size_t cell_counter = 0;
for (Cell_iterator
cit = c3t3.cells_in_complex_begin(),
end = c3t3.cells_in_complex_end();
cit != end; ++cit)
{
const Cell_handle ch = cit;
elem_stream << ++cell_counter;
for (int i=3; i>=0; i--)
{
const Vertex_handle vh = ch->vertex(i);
elem_stream << " " << V[vh];
}
elem_stream << std::endl;
}
elem_stream.close();
//-------------------------------------------------------
// Face
//-------------------------------------------------------
std::string face_filename = filename + ".face";
std::ofstream face_stream(face_filename.c_str());
face_stream << std::setprecision(17);
face_stream << c3t3.number_of_facets_in_complex() << " 0" << std::endl;
std::size_t facet_counter = 0;
for(Facet_iterator
fit = c3t3.facets_in_complex_begin(),
end = c3t3.facets_in_complex_end();
fit != end; ++fit )
{
const Facet& facet = *fit;
Vertex_handle vh1 = facet.first->vertex((facet.second+1)%4);
Vertex_handle vh2 = facet.first->vertex((facet.second+2)%4);
Vertex_handle vh3 = facet.first->vertex((facet.second+3)%4);
face_stream << ++facet_counter << " " << V[vh1] << " " << V[vh2] << " " << V[vh3] << std::endl;
}
face_stream.close();
//-------------------------------------------------------
// End
//-------------------------------------------------------
} // end output_to_tetgen(...)
} // end namespace SMDS_3
namespace IO {
/**
* \ingroup PkgSMDS3ExportFunctions
* @brief exports a mesh complex to tetgen format
* @param filename the path to the output files, without the extension.
* @param c3t3 the mesh complex
* @param rebind if true, labels of cells are rebinded into [1..nb_of_labels]
* @param show_patches if true, patches are labeled with different labels than
* cells. If false, each surface facet is written twice, using the label of
* each adjacent cell.
* \see \ref IOStreamTetgen
*/
template <class C3T3>
void
output_to_tetgen(std::string filename,
const C3T3& c3t3,
bool rebind = false,
bool show_patches = false)
{
if ( rebind )
{
if ( show_patches )
SMDS_3::output_to_tetgen<C3T3,true,false>(filename,c3t3);
else
SMDS_3::output_to_tetgen<C3T3,true,true>(filename,c3t3);
}
else
{
if ( show_patches )
SMDS_3::output_to_tetgen<C3T3,false,false>(filename,c3t3);
else
SMDS_3::output_to_tetgen<C3T3,false,true>(filename,c3t3);
}
}
} // namespace IO
#ifndef CGAL_NO_DEPRECATED_CODE
using IO::output_to_tetgen;
#endif
} // end namespace CGAL
#endif // CGAL_IO_FILE_TETGEN_H
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