mirror of https://github.com/CGAL/cgal
284 lines
8.1 KiB
C++
284 lines
8.1 KiB
C++
// Copyright (c) 2015 Geometry Factory
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// 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) : Lutz Kettner
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// Andreas Fabri
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// Maxime Gimeno
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#ifndef CGAL_IO_OBJ_H
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#define CGAL_IO_OBJ_H
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#include <CGAL/IO/OBJ/File_writer_wavefront.h>
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#include <CGAL/IO/Generic_writer.h>
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#include <boost/range/value_type.hpp>
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#include <CGAL/IO/io.h>
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#include <fstream>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <vector>
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namespace CGAL {
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Read
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namespace IO {
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namespace internal {
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template <typename PointRange, typename PolygonRange, typename VertexNormalOutputIterator, typename VertexTextureOutputIterator>
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bool read_OBJ(std::istream& is,
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PointRange& points,
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PolygonRange& faces,
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VertexNormalOutputIterator,
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VertexTextureOutputIterator,
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bool verbose = true)
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{
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if(!is.good())
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{
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if(verbose)
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std::cerr<<"File doesn't exist."<<std::endl;
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return false;
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}
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typedef typename boost::range_value<PointRange>::type Point;
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typedef typename CGAL::Kernel_traits<Point>::Kernel Kernel;
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typedef typename Kernel::Vector_3 Normal;
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set_ascii_mode(is); // obj is ASCII only
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int mini(1), maxi(-1);
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std::string s;
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Point p;
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std::string line;
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bool tex_found(false), norm_found(false);
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while(getline(is, line))
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{
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if(line.empty())
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continue;
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std::istringstream iss(line);
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if(!(iss >> s))
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continue; // can't read anything on the line, whitespace only?
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if(s == "v")
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{
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if(!(iss >> p))
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{
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if(verbose)
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std::cerr << "error while reading OBJ vertex." << std::endl;
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return false;
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}
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points.push_back(p);
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}
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else if(s == "vt")
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{
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tex_found = true;
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}
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else if(s == "vn")
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{
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norm_found = true;
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}
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else if(s == "f")
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{
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int i;
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faces.emplace_back();
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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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// the format can be "f v1/vt1/vn1 v2/vt2/vn2 v3/vt3/vn3 ..." and we only read vertex ids for now,
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// so skip to the next vertex
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iss.ignore(256, ' ');
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}
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if(iss.bad())
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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(norm_found && verbose)
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std::cout<<"WARNING: normals were found in this file, but were discarded."<<std::endl;
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if(tex_found && verbose)
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std::cout<<"WARNING: textures were found in this file, but were discarded."<<std::endl;
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if(maxi == -1 && mini == 1)
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{
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if(verbose)
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std::cerr << "No face detected." << std::endl;
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return false;
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}
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if(maxi > static_cast<int>(points.size()) || mini < -static_cast<int>(points.size()))
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{
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if(verbose)
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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 !is.bad();
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}
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} // namespace internal
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} // namespace IO
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template <typename PointRange, typename PolygonRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_OBJ(std::istream& is,
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PointRange& points,
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PolygonRange& faces,
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const CGAL_BGL_NP_CLASS&,
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bool verbose = true)
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{
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using parameters::choose_parameter;
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using parameters::get_parameter;
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return IO::internal::read_OBJ(is, points, faces, CGAL::Emptyset_iterator(),
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CGAL::Emptyset_iterator(), verbose);
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}
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template <typename PointRange, typename PolygonRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_OBJ(const char* fname, PointRange& points, PolygonRange& polygons,
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const CGAL_BGL_NP_CLASS& np, bool verbose = true)
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{
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std::ifstream in(fname);
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return read_OBJ(in, points, polygons, np, verbose);
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}
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template <typename PointRange, typename PolygonRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_OBJ(const std::string& fname, PointRange& points, PolygonRange& polygons,
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const CGAL_BGL_NP_CLASS& np, bool verbose = true)
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{
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return read_OBJ(fname.c_str(), points, polygons, np, verbose);
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}
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//! \ingroup ObjIoFuncs
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//!
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/// reads the content of `is` into `points` and `faces`, using the `OBJ` format.
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///
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/// \tparam PointRange a `RandomAccessContainer` of `Point_3`
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/// \tparam PolygonRange a `RandomAccessContainer` of `RandomAccessContainer` of `std::size_t`
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///
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/// \see \ref IOStreamOBJ
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template <typename PointRange, typename PolygonRange>
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bool read_OBJ(std::istream& is, PointRange& points, PolygonRange& faces)
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{
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return read_OBJ(is, points, faces, parameters::all_default());
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}
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//! \ingroup ObjIoFuncs
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//!
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/// reads the content of the file `fname` into `points` and `faces`, using the `OBJ` format.
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///
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/// \tparam PointRange a `RandomAccessContainer` of `Point_3`
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/// \tparam PolygonRange a `RandomAccessContainer` of `RandomAccessContainer` of `std::size_t`
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///
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/// \see \ref IOStreamOBJ
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template <typename PointRange, typename PolygonRange>
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bool read_OBJ(const char* fname, PointRange& points, PolygonRange& faces)
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{
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return read_OBJ(fname, points, faces, parameters::all_default());
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}
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template <typename PointRange, typename PolygonRange>
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bool read_OBJ(const std::string& fname, PointRange& points, PolygonRange& polygons)
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{
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return read_OBJ(fname, points, polygons, parameters::all_default());
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Write
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template <typename PointRange,
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typename PolygonRange,
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typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_OBJ(std::ostream& os,
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const PointRange& points,
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const PolygonRange& polygons,
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const CGAL_BGL_NP_CLASS& np)
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{
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set_ascii_mode(os); // obj is ASCII only
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Generic_writer<std::ostream, File_writer_wavefront> writer(os);
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return writer(points, polygons, np);
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}
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template <typename PointRange,
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typename PolygonRange,
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typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_OBJ(const char* fname, const PointRange& points, const PolygonRange& polygons,
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const CGAL_BGL_NP_CLASS& np)
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{
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std::ofstream out(fname);
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return write_OBJ(out, points, polygons, np);
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}
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template <typename PointRange,
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typename PolygonRange,
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typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_OBJ(const std::string& fname, const PointRange& points, const PolygonRange& polygons,
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const CGAL_BGL_NP_CLASS& np)
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{
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return write_OBJ(fname.c_str(), points, polygons, np);
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}
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/*!
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* \ingroup ObjIoFuncs
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*
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* writes the content of `points` and `polygons` in `os`, in the OBJ format.
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*
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* \see \ref IOStreamOBJ
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*/
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template <typename PointRange, typename PolygonRange>
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bool write_OBJ(std::ostream& os, const PointRange& points, const PolygonRange& polygons)
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{
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return write_OBJ(os, points, polygons, parameters::all_default());
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}
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/*!
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* \ingroup ObjIoFuncs
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*
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* writes the content of `points` and `polygons` in a file named `fname`, in the OBJ format.
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*
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* \see \ref IOStreamOBJ
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*/
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template <typename PointRange, typename PolygonRange>
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bool write_OBJ(const char* fname, const PointRange& points, const PolygonRange& polygons)
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{
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return write_OBJ(fname, points, polygons, parameters::all_default());
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}
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template <typename PointRange, typename PolygonRange>
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bool write_OBJ(const std::string& fname, const PointRange& points, const PolygonRange& polygons)
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{
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return write_OBJ(fname, points, polygons, parameters::all_default());
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}
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} // namespace CGAL
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#endif // CGAL_IO_OBJ_H
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