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IfcOpenShell/src/ifcconvert/IfcConvert.cpp
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/********************************************************************************
* *
* This file is part of IfcOpenShell. *
* *
* IfcOpenShell is free software: you can redistribute it and/or modify *
* it under the terms of the Lesser GNU General Public License as published by *
* the Free Software Foundation, either version 3.0 of the License, or *
* (at your option) any later version. *
* *
* IfcOpenShell is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* Lesser GNU General Public License for more details. *
* *
* You should have received a copy of the Lesser GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
* *
********************************************************************************/
/********************************************************************************
* *
* This started as a brief example of how IfcOpenShell can be interfaced from *
* within a C++ context, it has since then evolved into a fullfledged command *
* line application that is able to convert geometry in an IFC files into *
* several tesselated and topological output formats. *
* *
********************************************************************************/
#include <fstream>
#include <sstream>
#include <set>
#include <time.h>
#include <boost/program_options.hpp>
#include "../ifcgeom/IfcGeomIterator.h"
#include "../ifcconvert/ColladaSerializer.h"
#include "../ifcconvert/IgesSerializer.h"
#include "../ifcconvert/StepSerializer.h"
#include "../ifcconvert/WavefrontObjSerializer.h"
#include "../ifcconvert/XmlSerializer.h"
#include "../ifcconvert/SvgSerializer.h"
#include <IGESControl_Controller.hxx>
static std::string DEFAULT_EXTENSION = "obj";
void printVersion() {
std::cerr << "IfcOpenShell IfcConvert " << IFCOPENSHELL_VERSION << std::endl;
}
void printUsage(const boost::program_options::options_description& generic_options, const boost::program_options::options_description& geom_options) {
printVersion();
std::cerr << "Usage: IfcConvert [options] <input.ifc> [<output>]" << std::endl
<< std::endl
<< "Converts the geometry in an IFC file into one of the following formats:" << std::endl
<< " .obj WaveFront OBJ (a .mtl file is also created)" << std::endl;
#ifdef WITH_OPENCOLLADA
std::cerr << " .dae Collada Digital Asset Exchange" << std::endl;
#endif
std::cerr << " .stp STEP Standard for the Exchange of Product Data" << std::endl
<< " .igs IGES Initial Graphics Exchange Specification" << std::endl
<< " .xml XML Property definitions and decomposition tree" << std::endl
<< " .svg SVG Scalable Vector Graphics (2d floor plan)" << std::endl
<< std::endl
<< "Command line options" << std::endl << generic_options << std::endl
<< "Advanced options" << std::endl << geom_options << std::endl;
}
std::string change_extension(const std::string& fn, const std::string& ext) {
std::string::size_type dot = fn.find_last_of('.');
if (dot != std::string::npos) {
return fn.substr(0,dot+1) + ext;
} else {
return fn + "." + ext;
}
}
static std::stringstream log_stream;
void write_log();
int main(int argc, char** argv) {
boost::program_options::options_description generic_options;
generic_options.add_options()
("help", "display usage information")
("version", "display version information")
("verbose,v", "more verbose output");
boost::program_options::options_description fileio_options;
fileio_options.add_options()
("input-file", boost::program_options::value<std::string>(), "input IFC file")
("output-file", boost::program_options::value<std::string>(), "output geometry file");
std::string bounds;
std::vector<std::string> entity_vector;
boost::program_options::options_description geom_options;
geom_options.add_options()
("plan",
"Specifies whether to include curves in the output result. Typically "
"these are representations of type Plan or Axis. Excluded by default.")
("model",
"Specifies whether to include surfaces and solids in the output result. "
"Typically these are representations of type Body or Facetation. "
"Included by default.")
("weld-vertices",
"Specifies whether vertices are welded, meaning that the coordinates "
"vector will only contain unique xyz-triplets. This results in a "
"manifold mesh which is useful for modelling applications, but might "
"result in unwanted shading artefacts in rendering applications.")
("use-world-coords",
"Specifies whether to apply the local placements of building elements "
"directly to the coordinates of the representation mesh rather than "
"to represent the local placement in the 4x3 matrix, which will in that "
"case be the identity matrix.")
("convert-back-units",
"Specifies whether to convert back geometrical output back to the "
"unit of measure in which it is defined in the IFC file. Default is "
"to use meters.")
("sew-shells",
"Specifies whether to sew the faces of IfcConnectedFaceSets together. "
"This is a potentially time consuming operation, but guarantees a "
"consistent orientation of surface normals, even if the faces are not "
"properly oriented in the IFC file.")
("merge-boolean-operands",
"Specifies whether to merge all IfcOpeningElement operands into a single "
"operand before applying the subtraction operation. This may "
"introduce a performance improvement at the risk of failing, in "
"which case the subtraction is applied one-by-one.")
("disable-opening-subtractions",
"Specifies whether to disable the boolean subtraction of "
"IfcOpeningElement Representations from their RelatingElements.")
("bounds", boost::program_options::value<std::string>(&bounds),
"Specifies the bounding rectangle, for example 512x512, to which the "
"output will be scaled. Only used when converting to SVG.")
("include",
"Specifies that the entities listed after --entities are to be included")
("exclude",
"Specifies that the entities listed after --entities are to be excluded")
("entities", boost::program_options::value< std::vector<std::string> >(&entity_vector)->multitoken(),
"A list of entities that should be included in or excluded from the "
"geometrical output, depending on whether --ignore or --include is "
"specified. Defaults to IfcOpeningElement and IfcSpace to be excluded.");
boost::program_options::options_description cmdline_options;
cmdline_options.add(generic_options).add(fileio_options).add(geom_options);
boost::program_options::positional_options_description positional_options;
positional_options.add("input-file", 1);
positional_options.add("output-file", 1);
boost::program_options::variables_map vmap;
try {
boost::program_options::store(boost::program_options::command_line_parser(argc, argv).
options(cmdline_options).positional(positional_options).run(), vmap);
} catch (const boost::program_options::unknown_option& e) {
std::cerr << "[Error] Unknown option '" << e.get_option_name() << "'" << std::endl << std::endl;
// Usage information will be emitted below
} catch (...) {
// Catch other errors such as invalid command line syntax
}
boost::program_options::notify(vmap);
if (vmap.count("version")) {
printVersion();
return 0;
} else if (vmap.count("help") || !vmap.count("input-file")) {
printUsage(generic_options, geom_options);
return vmap.count("help") ? 0 : 1;
} else if (vmap.count("include") && vmap.count("exclude")) {
std::cerr << "[Error] --include and --ignore can not be specified together" << std::endl;
printUsage(generic_options, geom_options);
return 1;
}
const bool verbose = vmap.count("verbose") != 0;
const bool weld_vertices = vmap.count("weld-vertices") != 0;
const bool use_world_coords = vmap.count("use-world-coords") != 0;
const bool convert_back_units = vmap.count("convert-back-units") != 0;
const bool sew_shells = vmap.count("sew-shells") != 0;
const bool merge_boolean_operands = vmap.count("merge-boolean-operands") != 0;
const bool disable_opening_subtractions = vmap.count("disable-opening-subtractions") != 0;
bool include_entities = vmap.count("include") != 0;
const bool include_plan = vmap.count("plan") != 0;
const bool include_model = vmap.count("model") != 0 || (!include_plan);
boost::optional<int> bounding_width, bounding_height;
if (vmap.count("bounds") == 1) {
int w, h;
if (sscanf(bounds.c_str(), "%ux%u", &w, &h) == 2) {
bounding_width = w;
bounding_height = h;
} else {
std::cerr << "[Error] Invalid use of --bounds" << std::endl;
printUsage(generic_options, geom_options);
return 1;
}
}
// Gets the set ifc types to be ignored from the command line.
std::set<std::string> entities;
for (std::vector<std::string>::const_iterator it = entity_vector.begin(); it != entity_vector.end(); ++it) {
std::string lowercase_type = *it;
std::transform(lowercase_type.begin(), lowercase_type.end(), lowercase_type.begin(), ::tolower);
entities.insert(lowercase_type);
}
const std::string input_filename = vmap["input-file"].as<std::string>();
// If no output filename is specified a Wavefront OBJ file will be output
// to maintain backwards compatibility with the obsolete IfcObj executable.
const std::string output_filename = vmap.count("output-file") == 1
? vmap["output-file"].as<std::string>()
: change_extension(input_filename, DEFAULT_EXTENSION);
if (output_filename.size() < 5) {
printUsage(generic_options, geom_options);
return 1;
}
std::string output_extension = output_filename.substr(output_filename.size()-4);
std::transform(output_extension.begin(), output_extension.end(), output_extension.begin(), ::tolower);
// If no entities are specified these are the defaults to skip from output
if (entity_vector.empty()) {
if (output_extension == ".svg") {
entities.insert("ifcspace");
include_entities = true;
} else {
entities.insert("ifcopeningelement");
entities.insert("ifcspace");
}
}
Logger::SetOutput(&std::cout, &log_stream);
Logger::Verbosity(verbose ? Logger::LOG_NOTICE : Logger::LOG_ERROR);
if (output_extension == ".xml") {
int exit_code = 1;
try {
XmlSerializer s(output_filename);
IfcParse::IfcFile f;
if (!f.Init(input_filename)) {
Logger::Message(Logger::LOG_ERROR, "Unable to parse .ifc file");
} else {
s.setFile(&f);
s.finalize();
exit_code = 0;
}
} catch (...) {}
write_log();
return exit_code;
}
IfcGeom::IteratorSettings settings;
settings.set(IfcGeom::IteratorSettings::APPLY_DEFAULT_MATERIALS, true);
settings.set(IfcGeom::IteratorSettings::USE_WORLD_COORDS, use_world_coords);
settings.set(IfcGeom::IteratorSettings::WELD_VERTICES, weld_vertices);
settings.set(IfcGeom::IteratorSettings::SEW_SHELLS, sew_shells);
settings.set(IfcGeom::IteratorSettings::CONVERT_BACK_UNITS, convert_back_units);
settings.set(IfcGeom::IteratorSettings::FASTER_BOOLEANS, merge_boolean_operands);
settings.set(IfcGeom::IteratorSettings::DISABLE_OPENING_SUBTRACTIONS, disable_opening_subtractions);
settings.set(IfcGeom::IteratorSettings::INCLUDE_CURVES, include_plan);
settings.set(IfcGeom::IteratorSettings::EXCLUDE_SOLIDS_AND_SURFACES, !include_model);
GeometrySerializer* serializer;
if (output_extension == ".obj") {
const std::string mtl_filename = output_filename.substr(0,output_filename.size()-3) + "mtl";
if (!use_world_coords) {
Logger::Message(Logger::LOG_NOTICE, "Using world coords when writing WaveFront OBJ files");
settings.set(IfcGeom::IteratorSettings::USE_WORLD_COORDS, true);
}
serializer = new WaveFrontOBJSerializer(output_filename, mtl_filename);
#ifdef WITH_OPENCOLLADA
} else if (output_extension == ".dae") {
serializer = new ColladaSerializer(output_filename);
#endif
} else if (output_extension == ".stp") {
serializer = new StepSerializer(output_filename);
} else if (output_extension == ".igs") {
// Not sure why this is needed, but it is.
// See: http://tracker.dev.opencascade.org/view.php?id=23679
IGESControl_Controller::Init();
serializer = new IgesSerializer(output_filename);
} else if (output_extension == ".svg") {
settings.set(IfcGeom::IteratorSettings::DISABLE_TRIANGULATION, true);
serializer = new SvgSerializer(output_filename);
if (bounding_width && bounding_height) {
((SvgSerializer*) serializer)->setBoundingRectangle(
static_cast<double>(*bounding_width),
static_cast<double>(*bounding_height)
);
}
} else {
Logger::Message(Logger::LOG_ERROR, "Unknown output filename extension");
write_log();
printUsage(generic_options, geom_options);
return 1;
}
if (!serializer->isTesselated()) {
if (weld_vertices) {
Logger::Message(Logger::LOG_NOTICE, "Weld vertices setting ignored when writing STEP or IGES files");
}
settings.disable_triangulation() = true;
}
IfcGeom::Iterator<double> context_iterator(settings, input_filename);
try {
if (include_entities) {
context_iterator.includeEntities(entities);
} else {
context_iterator.excludeEntities(entities);
}
} catch (const IfcParse::IfcException& e) {
std::cout << "[Error] " << e.what() << std::endl;
return 1;
}
if (!serializer->ready()) {
Logger::Message(Logger::LOG_ERROR, "Unable to open output file for writing");
write_log();
return 1;
}
time_t start,end;
time(&start);
if (!context_iterator.initialize()) {
Logger::Message(Logger::LOG_ERROR, "Unable to parse .ifc file or no geometrical entities found");
write_log();
return 1;
}
serializer->setFile(context_iterator.getFile());
if (convert_back_units) {
serializer->setUnitNameAndMagnitude(context_iterator.getUnitName(), static_cast<const float>(context_iterator.getUnitMagnitude()));
} else {
serializer->setUnitNameAndMagnitude("METER", 1.0f);
}
serializer->writeHeader();
std::set<std::string> materials;
int old_progress = -1;
Logger::Status("Creating geometry...");
// The functions IfcGeom::Iterator::get() and IfcGeom::Iterator::next()
// wrap an iterator of all geometrical products in the Ifc file.
// IfcGeom::Iterator::get() returns an IfcGeom::TriangulationElement or
// -BRepElement pointer, based on current settings. (see IfcGeomIterator.h
// for definition) IfcGeom::Iterator::next() is used to poll whether more
// geometrical entities are available. None of these functions throw
// exceptions, neither for parsing errors or geometrical errors. Upon
// calling next() the entity to be returned has already been processed, a
// true return value guarantees that a successfully processed product is
// available.
do {
const IfcGeom::Element<double>* geom_object = context_iterator.get();
if (serializer->isTesselated()) {
serializer->write(static_cast<const IfcGeom::TriangulationElement<double>*>(geom_object));
} else {
serializer->write(static_cast<const IfcGeom::BRepElement<double>*>(geom_object));
}
const int progress = context_iterator.progress() / 2;
if (old_progress!= progress) Logger::ProgressBar(progress);
old_progress = progress;
} while (context_iterator.next());
serializer->finalize();
delete serializer;
Logger::Status("\rDone creating geometry ");
write_log();
time(&end);
int dif = (int) difftime (end,start);
printf ("\nConversion took %d seconds\n", dif );
return 0;
}
void write_log() {
std::string log = log_stream.str();
if (!log.empty()) {
std::cerr << std::endl << "Log:" << std::endl;
std::cerr << log << std::endl;
}
}
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