95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
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// Copyright (c) 1997
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Stream_support/include/CGAL/IO/generic_copy_OFF.h $
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// $Id: generic_copy_OFF.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Lutz Kettner <kettner@mpi-sb.mpg.de>
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#ifndef CGAL_IO_GENERIC_COPY_OFF_H
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#define CGAL_IO_GENERIC_COPY_OFF_H 1
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#include <CGAL/basic.h>
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#include <cstddef>
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#include <CGAL/IO/File_header_OFF.h>
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#include <CGAL/IO/File_scanner_OFF.h>
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#include <iostream>
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namespace CGAL {
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template <class Writer>
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void
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generic_copy_OFF( File_scanner_OFF& scanner,
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std::ostream& out,
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Writer& writer) {
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std::istream& in = scanner.in();
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// scans a polyhedral surface in OFF from `in' and writes it
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// to `out' in the format provided by `writer'.
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if ( ! in) {
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if ( scanner.verbose()) {
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std::cerr << " " << std::endl;
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std::cerr << "generic_copy_OFF(): "
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"input error: file format is not in OFF."
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<< std::endl;
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}
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return;
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}
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// Print header. Number of halfedges is only trusted if it is
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// a polyhedral surface.
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writer.write_header( out,
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scanner.size_of_vertices(),
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scanner.polyhedral_surface() ?
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scanner.size_of_halfedges() : 0,
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scanner.size_of_facets());
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// read in all vertices
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double x, y, z; // Point coordinates.
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std::size_t i;
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for ( i = 0; i < scanner.size_of_vertices(); i++) {
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scanner.scan_vertex( x, y, z);
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writer.write_vertex( x, y, z);
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scanner.skip_to_next_vertex( i);
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}
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// read in all facets
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writer.write_facet_header();
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for ( i = 0; i < scanner.size_of_facets(); i++) {
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if ( ! in)
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return;
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std::size_t no;
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scanner.scan_facet( no, i);
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writer.write_facet_begin( no);
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for ( std::size_t j = 0; j < no; j++) {
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std::size_t index;
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scanner.scan_facet_vertex_index( index, i);
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writer.write_facet_vertex_index( index);
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}
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writer.write_facet_end();
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scanner.skip_to_next_facet( i);
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}
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writer.write_footer();
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}
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template <class Writer>
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void
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generic_copy_OFF( std::istream& in, std::ostream& out, Writer& writer,
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bool verbose = false) {
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// scans a polyhedral surface in OFF from `in' and writes it
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// to `out' in the format provided by `writer'.
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File_scanner_OFF scanner( in, verbose);
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generic_copy_OFF( scanner, out, writer);
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}
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} //namespace CGAL
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#endif // CGAL_IO_GENERIC_COPY_OFF_H //
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// EOF //
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