int main(int argc, char** argv) {

	if ( argc != 2 ) {
		std::cout << "usage: IfcParseExamples <filename.ifc>" << std::endl;
		return 1;
	}

	// Redirect the output (both progress and log) to stdout
	Logger::SetOutput(&std::cout,&std::cout);

	// Parse the IFC file provided in argv[1]
	IfcParse::IfcFile file;
	if ( ! file.Init(argv[1]) ) {
		std::cout << "Unable to parse .ifc file" << std::endl;
		return 1;
	}

	// Lets get a list of IfcBuildingElements, this is the parent
	// type of things like walls, windows and doors.
	// entitiesByType is a templated function and returns a
	// templated class that behaves like a std::vector.
	// Note that the return types are all typedef'ed as members of
	// the generated classes, ::list for the templated vector class,
	// ::ptr for a shared pointer and ::it for an iterator.
	// We will simply iterate over the vector and print a string
	// representation of the entity to stdout.
	//
	// Secondly, lets find out which of them are IfcWindows. 
	// In order to access the additional properties that windows 
	// have on top af the properties of building elements, 
	// we need to cast them to IfcWindows. Since these properties 
	// are optional we need to make sure the properties are 
	// defined for the window in question before accessing them.
	IfcBuildingElement::list::ptr elements = file.entitiesByType<IfcBuildingElement>();

	std::cout << "Found " << elements->size() << " elements in " << argv[1] << ":" << std::endl;
	
	for ( IfcBuildingElement::list::it it = elements->begin(); it != elements->end(); ++ it ) {
		
		const IfcBuildingElement* element = *it;
		std::cout << element->entity->toString() << std::endl;
		
		if ( element->is(IfcWindow::Class()) ) {
			const IfcWindow* window = (IfcWindow*)element;
			
			if ( window->hasOverallWidth() && window->hasOverallHeight() ) {
				const double area = window->OverallWidth()*window->OverallHeight();
				std::cout << "The area of this window is " << area << std::endl;
			}
		}

	}

}
Exemple #2
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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.")
#if OCC_VERSION_HEX < 0x60900
		// In Open CASCADE version prior to 6.9.0 boolean operations with multiple
		// arguments where not introduced yet and a work-around was implemented to
		// subtract multiple openings as a single compound. This hack is obsolete
		// for newer versions of Open CASCADE.
		("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.")
#endif
		("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;
#if OCC_VERSION_HEX < 0x60900
	const bool merge_boolean_operands = vmap.count("merge-boolean-operands") != 0;
#endif
	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) {
		const std::string& mixed_case_type = *it;
		entities.insert(boost::to_lower_copy(mixed_case_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);
	boost::to_lower(output_extension);

	// 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);
#if OCC_VERSION_HEX < 0x60900
	settings.set(IfcGeom::IteratorSettings::FASTER_BOOLEANS,              merge_boolean_operands);
#endif
	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);

	IfcGeom::ProductFilter productFilter;
	try {
		if (include_entities) {
			productFilter.includeEntities(entities);
		} else {
			productFilter.excludeEntities(entities);
		}
		context_iterator.setProductFilter(&productFilter, &IfcGeom::ProductFilter::shouldConvertProduct);
	} 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;
}