mirror of https://github.com/CGAL/cgal
419 lines
15 KiB
C++
419 lines
15 KiB
C++
// Copyright (c) 2018-2020 GeometryFactory Sarl (France).
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// All rights reserved.
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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 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) : Maxime Gimeno
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#ifndef CGAL_IO_STL_H
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#define CGAL_IO_STL_H
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#include <CGAL/IO/STL/STL_reader.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 <CGAL/Kernel/global_functions_3.h>
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#include <boost/range/value_type.hpp>
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#include <iostream>
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#include <fstream>
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#include <string>
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#ifdef DOXYGEN_RUNNING
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#define CGAL_BGL_NP_TEMPLATE_PARAMETERS NamedParameters
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#define CGAL_BGL_NP_CLASS NamedParameters
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#endif
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namespace CGAL {
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Read
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/*!
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* \ingroup PkgStreamSupportIoFuncsSTL
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*
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* \brief reads the content of `is` into `points` and `facets`, using the \ref IOStreamSTL.
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*
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* \tparam PointRange a model of the concept `RandomAccessContainer` whose value type is the point type.
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* \tparam TriangleRange a model of the concept `SequenceContainer`
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* whose value_type is itself a model of the concept `SequenceContainer`
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* whose value_type is an integer type.
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* \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"
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*
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* \param is the input stream
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* \param points points of the soup of triangles
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* \param facets a `TriangleRange`. Each element in it describes a triangle
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* using the indices of the points in `points`.
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* \param np optional \ref bgl_namedparameters "Named Parameters" described below
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*
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* \cgalNamedParamsBegin
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* \cgalParamNBegin{verbose}
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* \cgalParamDescription{indicates whether output warnings and error messages should be printed or not.}
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* \cgalParamType{Boolean}
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* \cgalParamDefault{`true`}
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* \cgalParamNEnd
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* \cgalNamedParamsEnd
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*
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* \returns `true` if the reading was successful, `false` otherwise.
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*/
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_STL(std::istream& is,
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PointRange& points,
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TriangleRange& facets,
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const CGAL_BGL_NP_CLASS& np
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#ifndef DOXYGEN_RUNNING
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, typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr
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#endif
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)
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{
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const bool verbose = parameters::choose_parameter(parameters::get_parameter(np, internal_np::verbose), true);
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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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int pos = 0;
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// Ignore all initial whitespace
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unsigned char c;
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while(is.read(reinterpret_cast<char*>(&c), sizeof(c)))
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{
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if(!isspace(c))
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{
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is.unget(); // move back to the first interesting char
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break;
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}
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++pos;
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}
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if(!is.good()) // reached the end
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return true;
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// If we have gone beyond 80 characters and have not read anything yet,
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// then this must be an ASCII file.
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if(pos > 80)
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return IO::internal::parse_ASCII_STL(is, points, facets, verbose);
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// We are within the first 80 characters, both ASCII and binary are possible
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// Read the 5 first characters to check if the first word is "solid"
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std::string s;
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char word[6];
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if(is.read(reinterpret_cast<char*>(&word[0]), sizeof(c)) &&
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is.read(reinterpret_cast<char*>(&word[1]), sizeof(c)) &&
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is.read(reinterpret_cast<char*>(&word[2]), sizeof(c)) &&
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is.read(reinterpret_cast<char*>(&word[3]), sizeof(c)) &&
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is.read(reinterpret_cast<char*>(&word[4]), sizeof(c)) &&
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is.read(reinterpret_cast<char*>(&word[5]), sizeof(c)))
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{
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s = std::string(word, 5);
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pos += 5;
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}
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else
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{
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return true; // empty file
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}
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// If the first word is not 'solid', the file must be binary
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if(s != "solid" || (word[5] !='\n' && word[5] != ' '))
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{
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if(IO::internal::parse_binary_STL(is, points, facets, verbose))
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{
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return true;
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}
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else
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{
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// If we failed to read it as a binary, try as ASCII just in case...
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// The file does not start with 'solid' anyway, so it's fine to reset it.
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is.clear();
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is.seekg(0, std::ios::beg);
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return IO::internal::parse_ASCII_STL(is, points, facets, verbose);
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}
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}
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// Now, we have found the keyword "solid" which is supposed to indicate that the file is ASCII
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is.clear();
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is.seekg(0, std::ios::beg); // the parser needs to read all "solid" to work correctly.
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if(IO::internal::parse_ASCII_STL(is, points, facets, verbose))
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{
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// correctly read the input as an ASCII file
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return true;
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}
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else // Failed to read the ASCII file
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{
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// It might have actually have been a binary file... ?
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return IO::internal::parse_binary_STL(is, points, facets, verbose);
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}
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}
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/// \cond SKIP_IN_MANUAL
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template <typename PointRange, typename TriangleRange>
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bool read_STL(std::istream& is, PointRange& points, TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return read_STL(is, points, facets, parameters::all_default());
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}
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/// \endcond
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/*!
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* \ingroup PkgStreamSupportIoFuncsSTL
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*
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* \brief reads the content of a file named `fname` into `points` and `facets`, using the \ref IOStreamSTL.
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*
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* \tparam PointRange a model of the concept `RandomAccessContainer` whose value type is the point type.
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* \tparam TriangleRange a model of the concept `SequenceContainer`
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* whose value_type is itself a model of the concept `SequenceContainer`
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* whose value_type is an integer type.
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* \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"
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*
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* \param fname the path to the input file
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* \param points points of the soup of triangles
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* \param facets a `TriangleRange`. Each element in it describes a triangle
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* using the indices of the points in `points`.
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* \param np optional \ref bgl_namedparameters "Named Parameters" described below
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*
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* \cgalNamedParamsBegin
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* \cgalParamNBegin{verbose}
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* \cgalParamDescription{indicates whether output warnings and error messages should be printed or not.}
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* \cgalParamType{Boolean}
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* \cgalParamDefault{`true`}
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* \cgalParamNEnd
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* \cgalNamedParamsEnd
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*
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* \returns `true` if the reading was successful, `false` otherwise.
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*/
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_STL(const char* fname, PointRange& points, TriangleRange& facets, const CGAL_BGL_NP_CLASS& np,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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std::ifstream in(fname);
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return read_STL(in, points, facets, np);
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}
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/// \cond SKIP_IN_MANUAL
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template <typename PointRange, typename TriangleRange>
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bool read_STL(const char* fname, PointRange& points, TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return read_STL(fname, points, facets, parameters::all_default());
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}
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_STL(const std::string& fname, PointRange& points, TriangleRange& facets, const CGAL_BGL_NP_CLASS& np,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return read_STL(fname.c_str(), points, facets, np);
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}
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template <typename PointRange, typename TriangleRange>
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bool read_STL(const std::string& fname, PointRange& points, TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return read_STL(fname, points, facets, parameters::all_default());
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}
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/// \endcond
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Write
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/*!
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* \ingroup PkgStreamSupportIoFuncsSTL
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*
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* writes the content of `points` and `facets` in `os`, using the \ref IOStreamSTL.
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*
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* \tparam PointRange a model of the concept `RandomAccessContainer` whose value type is the point type.
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* \tparam TriangleRange a model of the concept `SequenceContainer`
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* whose value_type is itself a model of the concept `SequenceContainer`
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* whose value_type is an integer type.
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* \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"
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*
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* \param os the output stream
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* \param points points of the soup of triangles
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* \param facets a `TriangleRange`. Each element in it describes a triangle
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* using the indices of the points in `points`.
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* \param np optional sequence of \ref bgl_namedparameters "Named Parameters" among the ones listed below
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*
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* \cgalNamedParamsBegin
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* \cgalParamNBegin{stream_precision}
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* \cgalParamDescription{a parameter used to set the precision (i.e. how many digits are generated) of the output stream}
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* \cgalParamType{int}
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* \cgalParamDefault{`6`}
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* \cgalParamNEnd
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* \cgalNamedParamsEnd
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*
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* \return `true` if the writing was successful, `false` otherwise.
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*/
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_STL(std::ostream& os,
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const PointRange& points,
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const TriangleRange& facets,
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const CGAL_BGL_NP_CLASS& np
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#ifndef DOXYGEN_RUNNING
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, typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr
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#endif
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)
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{
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typedef typename boost::range_value<TriangleRange>::type Triangle;
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using parameters::choose_parameter;
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using parameters::get_parameter;
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typedef typename CGAL::GetPointMap<PointRange, CGAL_BGL_NP_CLASS>::type PointMap;
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PointMap point_map = choose_parameter<PointMap>(get_parameter(np, internal_np::point_map));
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typedef typename boost::property_traits<PointMap>::value_type Point;
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typedef typename boost::property_traits<PointMap>::reference Point_ref;
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typedef typename CGAL::Kernel_traits<Point>::Kernel K;
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typedef typename K::Vector_3 Vector_3;
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if(!os.good())
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return false;
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const int precision = choose_parameter(get_parameter(np, internal_np::stream_precision), 6);
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os << std::setprecision(precision);
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if(get_mode(os) == IO::BINARY)
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{
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os << "FileType: Binary ";
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const boost::uint32_t N32 = static_cast<boost::uint32_t>(facets.size());
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os.write(reinterpret_cast<const char *>(&N32), sizeof(N32));
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for(const Triangle& face : facets)
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{
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const Point_ref p = get(point_map, points[face[0]]);
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const Point_ref q = get(point_map, points[face[1]]);
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const Point_ref r = get(point_map, points[face[2]]);
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const Vector_3 n = collinear(p,q,r) ? Vector_3(1,0,0) : unit_normal(p,q,r);
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const float coords[12] = { static_cast<float>(n.x()), static_cast<float>(n.y()), static_cast<float>(n.z()),
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static_cast<float>(p.x()), static_cast<float>(p.y()), static_cast<float>(p.z()),
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static_cast<float>(q.x()), static_cast<float>(q.y()), static_cast<float>(q.z()),
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static_cast<float>(r.x()), static_cast<float>(r.y()), static_cast<float>(r.z()) };
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for(int i=0; i<12; ++i)
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os.write(reinterpret_cast<const char *>(&coords[i]), sizeof(coords[i]));
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os << " ";
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}
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}
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else
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{
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os << "solid\n";
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for(const Triangle& face : facets)
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{
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const Point_ref p = get(point_map, points[face[0]]);
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const Point_ref q = get(point_map, points[face[1]]);
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const Point_ref r = get(point_map, points[face[2]]);
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const Vector_3 n = collinear(p,q,r) ? Vector_3(1,0,0) : unit_normal(p,q,r);
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os << "facet normal " << n << "\nouter loop\n";
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os << "vertex " << p << "\n";
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os << "vertex " << q << "\n";
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os << "vertex " << r << "\n";
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os << "endloop\nendfacet"<<std::endl;
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}
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os << "endsolid"<<std::endl;
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}
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return !os.fail();
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}
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/// \cond SKIP_IN_MANUAL
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template <typename PointRange, typename TriangleRange>
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bool write_STL(std::ostream& os, const PointRange& points, const TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return write_STL(os, points, facets, parameters::all_default());
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}
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/// \endcond
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/*!
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* \ingroup PkgStreamSupportIoFuncsSTL
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*
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* \brief writes the content of `points` and `facets` in a file named `fname`, using the \ref IOStreamSTL.
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*
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* \tparam PointRange a model of the concept `RandomAccessContainer` whose value type is the point type.
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* \tparam TriangleRange a model of the concept `SequenceContainer`
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* whose value_type is itself a model of the concept `SequenceContainer`
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* whose value_type is an integer type.
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* \tparam NamedParameters a sequence of \ref bgl_namedparameters "Named Parameters"
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*
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* \param fname the path to the output file
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* \param points points of the soup of triangles
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* \param facets a `TriangleRange`. Each element in it describes a triangle
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* using the indices of the points in `points`.
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* \param np optional sequence of \ref bgl_namedparameters "Named Parameters" among the ones listed below
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*
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* \cgalNamedParamsBegin
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* \cgalParamNBegin{stream_precision}
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* \cgalParamDescription{a parameter used to set the precision (i.e. how many digits are generated) of the output stream}
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* \cgalParamType{int}
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* \cgalParamDefault{`6`}
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* \cgalParamNEnd
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* \cgalNamedParamsEnd
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*
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* \return `true` if the writing was successful, `false` otherwise.
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*/
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_STL(const char* fname,
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const PointRange& points,
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const TriangleRange& facets,
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const CGAL_BGL_NP_CLASS& np
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#ifndef DOXYGEN_RUNNING
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, typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr
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#endif
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)
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{
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std::ofstream os(fname);
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return write_STL(os, points, facets, np);
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}
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/// \cond SKIP_IN_MANUAL
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template <typename PointRange, typename TriangleRange>
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bool write_STL(const char* fname, const PointRange& points, const TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return write_STL(fname, points, facets, parameters::all_default());
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}
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template <typename PointRange, typename TriangleRange, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_STL(const std::string& fname, const PointRange& points, const TriangleRange& facets, const CGAL_BGL_NP_CLASS& np,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return write_STL(fname.c_str(), points, facets, np);
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}
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template <typename PointRange, typename TriangleRange>
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bool write_STL(const std::string& fname, const PointRange& points, const TriangleRange& facets,
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typename boost::enable_if<IO::internal::is_Range<TriangleRange> >::type* = nullptr)
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{
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return write_STL(fname.c_str(), points, facets, parameters::all_default());
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}
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/// \endcond
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} // namespace CGAL
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#endif // CGAL_IO_STL_H
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