// ============================================================================
//
// Copyright (c) 1997 The CGAL Consortium
//
// This software and related documentation is part of an INTERNAL release
// of the Computational Geometry Algorithms Library (CGAL). It is not
// intended for general use.
//
// ----------------------------------------------------------------------------
//
// release       : $CGAL_Revision: $
// release_date  : $CGAL_Date: $
//
// file          : File_writer_wavefront.h
// chapter       : $CGAL_Chapter: Support Library ... $
// package       : $CGAL_Package: Polyhedron_IO 2.11 (04 Feb 2000) $
// source        : polyhedron_io.fw
// revision      : $Revision$
// revision_date : $Date$
// author(s)     : Lutz Kettner  <kettner@inf.ethz.ch>
//
// coordinator   : Herve Bronnimann  <Herve.Bronnimann@sophia.inria.fr>
//
// Writer for polyhedral surfaces in Wavefront file format (.obj)
// ============================================================================

#ifndef CGAL_IO_FILE_WRITER_WAVEFRONT_H
#define CGAL_IO_FILE_WRITER_WAVEFRONT_H 1
#ifndef CGAL_IO_BINARY_FILE_IO_H
#include <CGAL/IO/binary_file_io.h>
#endif // CGAL_IO_BINARY_FILE_IO_H
#ifndef CGAL_PROTECT_IOSTREAM
#include <iostream>
#define CGAL_PROTECT_IOSTREAM
#endif
#ifndef CGAL_PROTECT_CSTDDEF
#include <cstddef>
#define CGAL_PROTECT_CSTDDEF
#endif

CGAL_BEGIN_NAMESPACE

class File_writer_wavefront {
    std::ostream*  m_out;
    std::size_t    m_facets;
public:
    std::ostream& out() const { return *m_out; }
    void write_header( std::ostream& out,
                       std::size_t vertices,
                       std::size_t halfedges,
                       std::size_t facets);
    void write_footer() const {
        out() << "\n# End of Wavefront obj format #" << std::endl;
    }
    void write_vertex( const double& x, const double& y, const double& z) {
        out() << "v " << x << ' ' << y << ' ' << z << '\n';
    }
    void write_facet_header() {
        out() << "\n# " << m_facets << " facets\n";
        out() << "# ------------------------------------------\n\n";
    }
    void write_facet_begin( std::size_t)            { out() << "f "; }
    void write_facet_vertex_index( std::size_t idx) { out() << ' ' << idx+1; }
    void write_facet_end()                          { out() << '\n'; }
};

CGAL_END_NAMESPACE
#endif // CGAL_IO_FILE_WRITER_WAVEFRONT_H //
// EOF //