svg print space areas

src/ifcconvert/IfcConvert.cpp

@@ -357,7 +357,8 @@ int main(int argc, char** argv) {
             "Use a negative value to use the system's default precision (should be 6 typically). "
             "Applicable for OBJ and DAE output. For DAE output, value >= 15 means that up to 16 decimals are used, "
             " and any other value means that 6 or 7 decimals are used.")
-		("print-space-names", "Prints IfcSpace LongName and Name in the geometry output. Applicable for SVG output");
+		("print-space-names", "Prints IfcSpace LongName and Name in the geometry output. Applicable for SVG output")
+		("print-space-areas", "Prints calculated IfcSpace areas in square meters. Applicable for SVG output");
 
     po::options_description cmdline_options;
 	cmdline_options.add(generic_options).add(fileio_options).add(geom_options).add(ifc_options).add(serializer_options);
@@ -689,6 +690,9 @@ int main(int argc, char** argv) {
 		if (vmap.count("print-space-names") != 0) {
 			static_cast<SvgSerializer*>(serializer.get())->setPrintSpaceNames(true);
 		}
+		if (vmap.count("print-space-areas") != 0) {
+			static_cast<SvgSerializer*>(serializer.get())->setPrintSpaceAreas(true);
+		}
 		if (bounding_width.is_initialized() && bounding_height.is_initialized()) {
             static_cast<SvgSerializer*>(serializer.get())->setBoundingRectangle(bounding_width.get(), bounding_height.get());
 		}

src/serializers/SvgSerializer.cpp

@@ -383,7 +383,7 @@ void SvgSerializer::write(const IfcGeom::BRepElement<real_t>* o)
 
 		for (int i = 1; i <= wires->Length(); ++i) {
 			const TopoDS_Wire& wire = TopoDS::Wire(wires->Value(i));
-			if (wire.Closed() && print_space_names_ && o->type() == "IfcSpace") {
+			if (wire.Closed() && (print_space_names_ || print_space_areas_) && o->type() == "IfcSpace") {
 				// we explicitly specify the surface here, to later on
 				// simplify the projection from {x,y,z} to {u, v} because
 				// we know we can simply discard z.
@@ -448,8 +448,11 @@ void SvgSerializer::write(const IfcGeom::BRepElement<real_t>* o)
 		}
 
 		if (center_point) {
-			std::vector<std::string> labels = { o->name() };
-			if (o->type() == "IfcSpace") {
+			std::vector<std::string> labels;
+			if (print_space_names_) {
+				labels.push_back(o->name());
+			}
+			if (print_space_names_ && o->type() == "IfcSpace") {
 				auto attr = o->product()->get("LongName");
 				if (!attr->isNull()) {
 					std::string long_name = *attr;
@@ -458,6 +461,14 @@ void SvgSerializer::write(const IfcGeom::BRepElement<real_t>* o)
 					}
 				}
 			}
+			if (print_space_areas_) {
+				GProp_GProps prop;
+				BRepGProp::SurfaceProperties(largest_closed_wire_face, prop);
+				const double area = prop.Mass();
+				std::stringstream ss;
+				ss << std::setprecision(2) << std::fixed << std::showpoint << area;
+				labels.push_back(ss.str() + "m&#178;");
+			}
 
 			path_object& po = p;
 			util::string_buffer path;
@@ -468,9 +479,9 @@ void SvgSerializer::write(const IfcGeom::BRepElement<real_t>* o)
 			path.add("\" y=\"");
 			ycoords.push_back(path.add(center_point->Y()));
 			path.add("\">");
-			for (auto it = labels.begin(); it != labels.end(); ++it) {
-				const auto& l = *it;
-				double dy = labels.begin() == it
+			for (auto lit = labels.begin(); lit != labels.end(); ++lit) {
+				const auto& l = *lit;
+				double dy = labels.begin() == lit
 					? 0.35 - (labels.size() - 1.) / 2.
 					: 1.0; // <- dy is relative to the previous text element, so
 					       //    always 1 for successive spans.

src/serializers/SvgSerializer.h

@@ -38,7 +38,7 @@ protected:
 	std::ofstream svg_file;
 	double xmin, ymin, xmax, ymax, width, height;
 	boost::optional<double> section_height;
-	bool rescale, print_space_names_;
+	bool rescale, print_space_names_, print_space_areas_;
 	std::multimap<IfcUtil::IfcBaseEntity*, path_object> paths;
 	std::vector< boost::shared_ptr<util::string_buffer::float_item> > xcoords;
 	std::vector< boost::shared_ptr<util::string_buffer::float_item> > ycoords;
@@ -74,6 +74,7 @@ public:
     void setBoundingRectangle(double width, double height);
 	void setSectionHeight(double h, IfcUtil::IfcBaseEntity* storey = 0) { section_height = h; storey_ = storey; }
 	void setPrintSpaceNames(bool b) { print_space_names_ = b; }
+	void setPrintSpaceAreas(bool b) { print_space_areas_ = b; }
     std::string nameElement(const IfcGeom::Element<real_t>* elem);
     std::string nameElement(const IfcUtil::IfcBaseEntity* elem);
 };