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// Copyright (c) 1997
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org)
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1.1/Stream_support/include/CGAL/IO/Generic_writer.h $
// $Id: include/CGAL/IO/Generic_writer.h 08b27d3db14 $
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Lutz Kettner <kettner@mpi-sb.mpg.de>
#ifndef CGAL_IO_GENERIC_WRITER_H
#define CGAL_IO_GENERIC_WRITER_H
#include <CGAL/Named_function_parameters.h>
#include <CGAL/boost/graph/named_params_helper.h>
#include <iostream>
#include <iterator>
#include <vector>
namespace CGAL {
template <typename Stream, typename FileWriter>
class Generic_writer
{
public:
Generic_writer(Stream& os) : m_os(os) { }
Generic_writer(Stream& os, FileWriter writer) : m_os(os), m_writer(writer) { }
template <typename PointRange, typename PolygonRange, typename NamedParameters>
bool operator()(const PointRange& points,
const PolygonRange& polygons,
const NamedParameters& np = parameters::default_values())
{
typedef typename boost::range_value<PolygonRange>::type Poly;
using parameters::choose_parameter;
using parameters::get_parameter;
typedef typename CGAL::GetPointMap<PointRange, NamedParameters>::type PointMap;
PointMap point_map = choose_parameter<PointMap>(get_parameter(np, internal_np::point_map));
if(!m_os.good())
return false;
set_stream_precision_from_NP(m_os, np);
m_writer.write_header(m_os, points.size(), 0, polygons.size());
for(std::size_t i=0, end=points.size(); i<end; ++i)
{
const typename boost::property_traits<PointMap>::value_type& p = get(point_map, points[i]);
m_writer.write_vertex(to_double(p.x()), to_double(p.y()), to_double(p.z()));
}
m_writer.write_facet_header();
for(std::size_t i=0, end=polygons.size(); i<end; ++i)
{
const Poly& polygon = polygons[i];
const std::size_t size = polygon.size();
m_writer.write_facet_begin(size);
for(std::size_t j=0; j<size; ++j)
m_writer.write_facet_vertex_index(polygon[j]);
m_writer.write_facet_end();
}
m_writer.write_footer();
return m_os.good();
}
protected:
Stream& m_os;
FileWriter m_writer;
};
} // namespace CGAL
#endif // CGAL_IO_GENERIC_WRITER_H
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