mirror of https://github.com/CGAL/cgal
89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
// Copyright (c) 2016 GeometryFactory
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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 and Maxime Gimeno
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#ifndef CGAL_IO_OBJ_OBJ_READER_H
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#define CGAL_IO_OBJ_OBJ_READER_H
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#include <istream>
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#include <sstream>
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#include <vector>
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#include <limits>
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namespace CGAL {
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// Points_3 a RandomAccessContainer of Point_3,
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// Faces a RandomAccessContainer of RandomAccessContainer of std::size_t
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template <class Points_3, class Faces>
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bool read_OBJ(std::istream& input,
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Points_3 &points,
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Faces &faces)
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{
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typedef typename Points_3::value_type Point_3;
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int mini(1),
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maxi(-INT_MAX);
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Point_3 p;
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std::string line;
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while(getline(input, line))
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{
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if(line[0] == 'v' && line[1] == ' ')
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{
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std::istringstream iss(line.substr(1));
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iss >> p;
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if(!iss)
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return false;
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points.push_back(p);
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}
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else if(line[0] == 'f')
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{
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std::istringstream iss(line.substr(1));
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int i;
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faces.push_back(std::vector<std::size_t>());
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while(iss >> i)
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{
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if(i < 1)
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{
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faces.back().push_back(points.size()+i);//negative indices are relative references
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if(i<mini)
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mini=i;
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}
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else
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{
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faces.back().push_back(i-1);
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if(i-1 > maxi)
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maxi = i-1;
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}
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iss.ignore(256, ' ');
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}
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if(!iss.good() && !iss.eof())
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return false;
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}
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else
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{
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//std::cerr<<"ERROR : Cannnot read line beginning with "<<line[0]<<std::endl;
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continue;
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}
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}
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if(maxi > points.size() || mini < -static_cast<int>(points.size()))
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{
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std::cerr<<"a face index is invalid "<<std::endl;
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return false;
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}
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return true;
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}
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} // namespace CGAL
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#endif // CGAL_IO_OBJ_OBJ_READER_H
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