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// Copyright (c) 2014 INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: $
// $Id: $
//
// Author(s) : Clement Jamin
#ifndef CGAL_TRIANGULATION_IO_H
#define CGAL_TRIANGULATION_IO_H
#include <CGAL/Epick_d.h>
#include <CGAL/Triangulation.h>
#include <sstream>
#include <iostream>
namespace CGAL {
namespace Triangulation_IO
{
// TODO: test if the stream is binary or text?
template<typename Traits, typename P>
int
output_point(std::ostream & os, const Traits &traits, const P & p)
{
typedef typename Traits::Compute_coordinate_d Ccd;
const Ccd ccd = traits.compute_coordinate_d_object();
const int dim = traits.point_dimension_d_object()(p);
if (dim > 0)
{
os << ccd(p, 0);
for (int i = 1 ; i < dim ; ++i)
os << " " << CGAL::to_double(ccd(p, i));
}
return dim;
}
// TODO: test if the stream is binary or text?
template<typename Traits, typename P>
int
output_weighted_point(std::ostream & os, const Traits &traits, const P & p,
bool output_weight = true)
{
typedef typename Traits::Compute_coordinate_d Ccd;
typename Traits::Construct_point_d cp =
traits.construct_point_d_object();
typename Traits::Compute_weight_d pt_weight = traits.compute_weight_d_object();
const Ccd ccd = traits.compute_coordinate_d_object();
const int dim = traits.point_dimension_d_object()(p);
if (dim > 0)
{
output_point(os, traits, p);
if (output_weight)
os << " " << pt_weight(p);
}
return dim;
}
// TODO: test if the stream is binary or text?
template<typename Traits, typename FCH>
void
output_full_cell(std::ostream & os, const Traits &traits, const FCH & fch,
bool output_weights = false)
{
typename FCH::value_type::Vertex_handle_iterator vit = fch->vertices_begin();
for( ; vit != fch->vertices_end(); ++vit )
{
int dim;
if (output_weights)
dim = output_weighted_point(os, traits, (*vit)->point());
else
dim = output_point(os, traits, (*vit)->point());
if (dim > 0)
os << std::endl;
}
}
// TODO: test if the stream is binary or text?
/*template<typename Traits, typename P>
void
input_point(std::istream & is, const Traits &traits, P & p)
{
typedef typename Traits::FT FT;
std::vector<FT> coords;
std::string line;
for(;;)
{
if (!std::getline(is, line))
return is;
if (line != "")
break;
}
std::stringstream line_sstr(line);
FT temp;
while (line_sstr >> temp)
coords.push_back(temp);
p = traits.construct_point_d_object()(coords.begin(), coords.end());
}*/
} // namespace Triangulation_IO
///////////////////////////////////////////////////////////////
// TODO: replace these operator>> by an "input_point" function
///////////////////////////////////////////////////////////////
// TODO: test if the stream is binary or text?
template<typename K>
std::istream &
operator>>(std::istream &is, typename Wrap::Point_d<K> & p)
{
typedef typename Wrap::Point_d<K> P;
typedef typename K::FT FT;
std::vector<FT> coords;
std::string line;
for(;;)
{
if (!std::getline(is, line))
return is;
if (line != "")
break;
}
std::stringstream line_sstr(line);
FT temp;
while (line_sstr >> temp)
coords.push_back(temp);
p = P(coords.begin(), coords.end());
return is;
}
// TODO: test if the stream is binary or text?
template<typename K>
std::istream &
operator>>(std::istream &is, typename Wrap::Weighted_point_d<K> & wp)
{
typedef typename Wrap::Point_d<K> P;
typedef typename Wrap::Weighted_point_d<K> WP;
typedef typename K::FT FT;
std::string line;
for(;;)
{
if (!std::getline(is, line))
return is;
if (line != "")
break;
}
std::stringstream line_sstr(line);
FT temp;
std::vector<FT> coords;
while (line_sstr >> temp)
coords.push_back(temp);
typename std::vector<FT>::iterator last = coords.end() - 1;
P p = P(coords.begin(), last);
wp = WP(p, *last);
return is;
}
// TODO: test if the stream is binary or text?
template<typename K>
std::istream &
operator>>(std::istream &is, typename Wrap::Vector_d<K> & v)
{
typedef typename Wrap::Vector_d<K> V;
typedef typename K::FT FT;
std::vector<FT> coords;
std::string line;
for (;;)
{
if (!std::getline(is, line))
return is;
if (line != "")
break;
}
std::stringstream line_sstr(line);
FT temp;
while (line_sstr >> temp)
coords.push_back(temp);
v = V(coords.begin(), coords.end());
return is;
}
template < class GT, class TDS >
std::ostream &
export_triangulation_to_off(std::ostream & os,
const Triangulation<GT,TDS> & tr,
bool in_3D_export_surface_only = false)
{
typedef Triangulation<GT,TDS> Tr;
typedef typename Tr::Vertex_const_handle Vertex_handle;
typedef typename Tr::Finite_vertex_const_iterator Finite_vertex_iterator;
typedef typename Tr::Finite_full_cell_const_iterator Finite_full_cell_iterator;
typedef typename Tr::Full_cell_const_iterator Full_cell_iterator;
typedef typename Tr::Full_cell Full_cell;
typedef typename Full_cell::Vertex_handle_const_iterator Full_cell_vertex_iterator;
if (tr.maximal_dimension() < 2 || tr.maximal_dimension() > 3)
{
std::cerr << "Warning: export_tds_to_off => dimension should be 2 or 3.";
os << "Warning: export_tds_to_off => dimension should be 2 or 3.";
return os;
}
size_t n = tr.number_of_vertices();
std::stringstream output;
// write the vertices
std::map<Vertex_handle, int> index_of_vertex;
int i = 0;
for(Finite_vertex_iterator it = tr.finite_vertices_begin();
it != tr.finite_vertices_end(); ++it, ++i)
{
Triangulation_IO::output_point(output, tr.geom_traits(), it->point());
if (tr.maximal_dimension() == 2)
output << " 0";
output << std::endl;
index_of_vertex[it.base()] = i;
}
CGAL_assertion( i == n );
size_t number_of_triangles = 0;
if (tr.maximal_dimension() == 2)
{
for (Finite_full_cell_iterator fch = tr.finite_full_cells_begin() ;
fch != tr.finite_full_cells_end() ; ++fch)
{
output << "3 ";
for (Full_cell_vertex_iterator vit = fch->vertices_begin() ;
vit != fch->vertices_end() ; ++vit)
{
output << index_of_vertex[*vit] << " ";
}
output << std::endl;
++number_of_triangles;
}
}
else if (tr.maximal_dimension() == 3)
{
if (in_3D_export_surface_only)
{
// Parse boundary facets
for (Full_cell_iterator fch = tr.full_cells_begin() ;
fch != tr.full_cells_end() ; ++fch)
{
if (tr.is_infinite(fch))
{
output << "3 ";
for (Full_cell_vertex_iterator vit = fch->vertices_begin() ;
vit != fch->vertices_end() ; ++vit)
{
if (!tr.is_infinite(*vit))
output << index_of_vertex[*vit] << " ";
}
output << std::endl;
++number_of_triangles;
}
}
}
else
{
// Parse finite cells
for (Finite_full_cell_iterator fch = tr.finite_full_cells_begin() ;
fch != tr.finite_full_cells_end() ; ++fch)
{
output << "3 "
<< index_of_vertex[fch->vertex(0)] << " "
<< index_of_vertex[fch->vertex(1)] << " "
<< index_of_vertex[fch->vertex(2)]
<< std::endl;
output << "3 "
<< index_of_vertex[fch->vertex(0)] << " "
<< index_of_vertex[fch->vertex(2)] << " "
<< index_of_vertex[fch->vertex(3)]
<< std::endl;
output << "3 "
<< index_of_vertex[fch->vertex(1)] << " "
<< index_of_vertex[fch->vertex(2)] << " "
<< index_of_vertex[fch->vertex(3)]
<< std::endl;
output << "3 "
<< index_of_vertex[fch->vertex(0)] << " "
<< index_of_vertex[fch->vertex(1)] << " "
<< index_of_vertex[fch->vertex(3)]
<< std::endl;
number_of_triangles += 4;
}
}
}
os << "OFF \n"
<< n << " "
<< number_of_triangles << " 0\n"
<< output.str();
return os;
}
} //namespace CGAL
#endif // CGAL_TRIANGULATION_IO_H
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