324 lines
10 KiB
C++
Executable File
324 lines
10 KiB
C++
Executable File
// 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); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0+
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//
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//
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// Author(s) : Andreas Fabri
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#ifndef CGAL_BOOST_GRAPH_IO_H
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#define CGAL_BOOST_GRAPH_IO_H
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#include <boost/container/flat_map.hpp>
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#include <boost/foreach.hpp>
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#include <iostream>
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#include <algorithm>
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#include <sstream>
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#include <fstream>
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#include <string>
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#include <CGAL/boost/graph/Euler_operations.h>
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#include <CGAL/boost/graph/helpers.h>
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#include <CGAL/boost/graph/named_params_helper.h>
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#include <CGAL/boost/graph/named_function_params.h>
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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 OFF format.
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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`\cgalParamEnd
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* \cgalNamedParamsEnd
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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*/
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template <typename FaceGraph, typename NamedParameters>
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bool write_off(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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typedef typename boost::graph_traits<FaceGraph>::faces_size_type faces_size_type;
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typename Polygon_mesh_processing::GetVertexPointMap<FaceGraph, NamedParameters>::const_type
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vpm = choose_param(get_param(np, internal_np::vertex_point),
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get_const_property_map(CGAL::vertex_point, g));
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vertices_size_type nv = static_cast<vertices_size_type>(std::distance(vertices(g).first, vertices(g).second));
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faces_size_type nf = static_cast<faces_size_type>(std::distance(faces(g).first, faces(g).second));
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os << "OFF\n" << nv << " " << nf << " 0\n";
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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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BOOST_FOREACH(vertex_descriptor v, vertices(g)){
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os << get(vpm,v) << '\n';
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reindex[v]=n++;
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}
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BOOST_FOREACH(face_descriptor f, faces(g)){
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os << degree(f,g);
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BOOST_FOREACH(vertex_descriptor v, vertices_around_face(halfedge(f,g),g)){
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os << " " << reindex[v];
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}
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os << '\n';
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}
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return os.good();
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}
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/*!
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\ingroup PkgBGLIOFct
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writes the graph `g` in the OFF format into a file named `fname`.
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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*/
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template <typename FaceGraph, typename NamedParameters>
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bool write_off(const char* fname,
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const FaceGraph& g,
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const NamedParameters& np)
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{
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std::ofstream out(fname);
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if(out.good()){
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return write_off(out,g, np);
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}
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return false;
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}
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template <typename FaceGraph, typename NamedParameters>
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bool write_off(const std::string& fname,
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const FaceGraph& g,
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const NamedParameters& np)
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{ return write_off(fname.c_str(), g, np); }
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template <typename FaceGraph>
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bool write_off(std::ostream& os,
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const FaceGraph& g)
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{
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return write_off(os, g,
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parameters::all_default());
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}
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template <typename FaceGraph>
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bool write_off(const char* fname,
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const FaceGraph& g)
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{
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return write_off(fname,g,
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parameters::all_default());
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}
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template <typename FaceGraph>
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bool write_off(const std::string& fname,
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const FaceGraph& g)
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{ return write_off(fname, g,
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parameters::all_default()); }
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namespace internal { namespace read_off_tools {
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inline bool is_whitespace(const std::string& s)
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{
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for(unsigned int i=0; i < s.size(); i++){
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if(s[i] != ' ' && s[i] != '\t'){
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return false;
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}
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}
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return true;
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}
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inline std::string next_non_comment(std::istream& is)
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{
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std::string line;
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do {
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std::getline(is, line);
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}while(line[0] == '#' || is_whitespace(line));
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return line;
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}
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}
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} // namespace internal
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/*!
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\ingroup PkgBGLIOFct
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reads the graph `g` from data in the OFF format. Ignores comment lines which start with a hash, and lines with whitespace.
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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`\cgalParamEnd
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* \cgalNamedParamsEnd
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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\pre The data must represent a 2-manifold
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\attention The graph `g` is not cleared, and the data from the stream are added.
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*/
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template <typename FaceGraph, typename NamedParameters>
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bool read_off(std::istream& is,
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FaceGraph& g,
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NamedParameters np)
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{
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using namespace internal::read_off_tools;
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typedef typename boost::graph_traits<FaceGraph>::vertex_descriptor vertex_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::vertices_size_type vertices_size_type;
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typedef typename boost::graph_traits<FaceGraph>::faces_size_type faces_size_type;
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typedef typename Polygon_mesh_processing::GetVertexPointMap<FaceGraph, NamedParameters>::type Vpm;
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typedef typename boost::property_traits<Vpm>::value_type Point_3;
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Vpm vpm = choose_param(get_param(np, internal_np::vertex_point),
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get_property_map(CGAL::vertex_point, g));
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vertices_size_type nv, nvf;
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faces_size_type nf;
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int ignore;
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std::string line = next_non_comment(is);
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{
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std::istringstream iss(line);
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std::string off;
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iss >> off;
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CGAL_assertion( off == "OFF" || off == "COFF");
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}
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line = next_non_comment(is);
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{
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std::istringstream iss(line);
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iss >> nv >> nf >> ignore;
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}
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std::vector<vertex_descriptor> vertices(nv);
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Point_3 p;
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for(vertices_size_type i=0; i < nv; i++){
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line = next_non_comment(is);
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std::istringstream iss(line);
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iss >> p;
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vertices[i] = add_vertex(g);
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put(vpm,vertices[i],p);
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}
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for(faces_size_type i=0; i < nf; i++){
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line = next_non_comment(is);
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std::istringstream iss(line);
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iss >> nvf;
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std::vector<vertex_descriptor> face(nvf);
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for(vertices_size_type j = 0; j < nvf; j++){
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faces_size_type fvi;
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iss >> fvi;
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face[j] = vertices[fvi];
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}
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Euler::add_face(face,g);
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}
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return true;
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}
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template <typename FaceGraph>
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bool read_off(std::istream& is,
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FaceGraph& g)
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{
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return read_off(is, g, parameters::all_default());
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}
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/*!
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\ingroup PkgBGLIOFct
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reads the graph `g` from data in the OFF format. Ignores comment lines which start with a hash, and lines with whitespace.
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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\pre The data must represent a 2-manifold
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\attention The graph `g` is not cleared, and the data from the stream are added.
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*/
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template <typename FaceGraph, typename NamedParameters>
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bool read_off(const char* fname,
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FaceGraph& g,
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NamedParameters np)
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{
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std::ifstream in(fname);
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if(in.good()){
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return read_off(in, g, np);
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}
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return false;
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}
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template <typename FaceGraph>
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bool read_off(const char* fname,
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FaceGraph& g)
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{
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return read_off(fname, g, parameters::all_default());
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}
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template <typename FaceGraph, typename NamedParameters>
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bool read_off(const std::string& fname,
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FaceGraph& g,
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NamedParameters np)
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{ return read_off(fname.c_str(), g, np); }
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template <typename FaceGraph>
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bool read_off(const std::string& fname,
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FaceGraph& g)
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{ return read_off(fname, g, parameters::all_default()); }
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template <typename FaceGraph, typename NamedParameters>
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bool write_inp(std::ostream& os,
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const FaceGraph& g,
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std::string name,
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std::string type,
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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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typedef typename Polygon_mesh_processing::GetVertexPointMap<FaceGraph, NamedParameters>::const_type VPM;
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typedef typename boost::property_traits<VPM>::value_type Point_3;
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VPM vpm = choose_param(get_param(np, internal_np::vertex_point),
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get_const_property_map(CGAL::vertex_point, g));
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os << "*Part, name=" << name << "\n*Node\n";
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boost::container::flat_map<vertex_descriptor,vertices_size_type> reindex;
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int n = 1;
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BOOST_FOREACH(vertex_descriptor v, vertices(g)){
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Point_3 p = get(vpm,v);
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os << n << ", " << p.x() << ", " << p.y() << ", " << p.z() << '\n';
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reindex[v]=n++;
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}
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n = 1;
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os << "*Element, type=" << type << std::endl;
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BOOST_FOREACH(face_descriptor f, faces(g)){
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os << n++;
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BOOST_FOREACH(vertex_descriptor v, vertices_around_face(halfedge(f,g),g)){
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os << ", " << reindex[v];
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}
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os << '\n';
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}
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os << "*End Part"<< std::endl;
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return os.good();
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}
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// conveniance overload
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template <typename FaceGraph>
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bool write_inp(std::ostream& os,
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const FaceGraph& g,
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std::string name,
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std::string type)
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{
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return write_inp(os, g, name, type, parameters::all_default());
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}
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} // namespace CGAL
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#endif // CGAL_BOOST_GRAPH_IO_H
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