mirror of https://github.com/CGAL/cgal
126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
// Copyright (c) 2015 GeometryFactory (France). 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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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Andreas Fabri
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// Mael Rouxel-Labbé
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#ifndef CGAL_BGL_IO_WRL_H
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#define CGAL_BGL_IO_WRL_H
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#include <CGAL/boost/graph/Named_function_parameters.h>
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#include <CGAL/boost/graph/named_params_helper.h>
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#include <boost/container/flat_map.hpp>
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#include <fstream>
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namespace CGAL {
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/*!
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\ingroup PkgBGLIOFct
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writes the graph `g` in the wrl format (VRML 2.0).
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\cgalNamedParamsBegin
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\cgalParamBegin{vertex_point_map} the property map with the points associated to the vertices of `g`.
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If this parameter is omitted, an internal property map for
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`CGAL::vertex_point_t` should be available in `FaceGraph`
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\cgalParamEnd
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\cgalNamedParamsEnd
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\see \ref IOStreamWRL
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*/
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template <typename FaceGraph, typename NamedParameters>
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bool write_WRL(std::ostream& os,
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const FaceGraph& g,
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const NamedParameters& np)
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{
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typedef typename boost::graph_traits<FaceGraph>::vertex_descriptor vertex_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::face_descriptor face_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::vertices_size_type vertices_size_type;
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using parameters::get_parameter;
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using parameters::choose_parameter;
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typename CGAL::GetVertexPointMap<FaceGraph, NamedParameters>::const_type
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vpm = choose_parameter(get_parameter(np, internal_np::vertex_point),
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get_const_property_map(CGAL::vertex_point, g));
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boost::container::flat_map<vertex_descriptor,vertices_size_type> reindex;
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int n = 0;
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os << "#VRML V2.0 utf8\n"
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"Group {\n"
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"children [\n"
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"Shape {\n"
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"appearance DEF A1 Appearance {\n"
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"material Material {\n"
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"diffuseColor .6 .5 .9\n"
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"}\n"
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"}\n"
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"appearance\n"
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"Appearance {\n"
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"material DEF Material Material {}\n"
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"}\n"
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"}\n"
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"Group {\n"
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"children [\n"
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"Shape {\n"
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"appearance Appearance { material USE Material }\n"
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"geometry IndexedFaceSet {\n"
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"convex FALSE\n"
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"solid FALSE\n"
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"coord Coordinate {\n"
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"point [\n";
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for(vertex_descriptor v : vertices(g))
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{
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os << get(vpm,v) << ",\n";
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reindex[v] = n++;
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}
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os << "] #point\n"
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"} #coord Coordinate\n"
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"coordIndex [\n";
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for(face_descriptor f : faces(g))
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{
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for(vertex_descriptor v : vertices_around_face(halfedge(f, g), g))
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os << reindex[v] << ",";
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os << "-1,\n";
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}
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os << "] #coordIndex\n"
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"} #geometry\n"
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"} #Shape\n"
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"] #children\n"
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"} #group\n"
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"]\n"
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"}\n";
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return os.good();
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}
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_WRL(const std::string& fname, const FaceGraph& g, const CGAL_BGL_NP_CLASS& np)
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{
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return write_WRL(fname.c_str(), g, np);
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}
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template <typename FaceGraph>
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bool write_WRL(std::ostream& os, const FaceGraph& g) { return write_WRL(os, g, parameters::all_default()); }
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template <typename FaceGraph>
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bool write_WRL(const char* fname, const FaceGraph& g) { return write_WRL(fname, g, parameters::all_default()); }
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template <typename FaceGraph>
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bool write_WRL(const std::string& fname, const FaceGraph& g) { return write_WRL(fname, g, parameters::all_default()); }
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} // namespace CGAL
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#endif // CGAL_BGL_IO_WRL_H
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