setOnlyValid() option that skips and logs invalid topology #4130

src/ifcgeom/kernels/opencascade/base_utils.cpp

@@ -41,6 +41,8 @@
 #include <ShapeFix_Shape.hxx>
 #include <BRepCheck_Analyzer.hxx>
 #include <BRepClass3d_SolidClassifier.hxx>
+#include <BRepCheck.hxx>
+#include <BRepTools.hxx>
 
 #include <BRepAlgoAPI_Fuse.hxx>
 
@@ -822,3 +824,43 @@ bool IfcGeom::util::flatten_shape_list(const IfcGeom::ConversionResults& shapes,
 	const bool success = !result.IsNull();
 	return success;
 }
+
+bool IfcGeom::util::validate_shape(const TopoDS_Shape& s) {
+	BRepCheck_Analyzer ana(s);
+	if (ana.IsValid()) {
+		return true;
+	}
+
+	std::stringstream str;
+	bool any_emitted = false;
+
+	std::function<void(const TopoDS_Shape&)> dump;
+	dump = [&ana, &str, &dump, &any_emitted](const TopoDS_Shape& s) {
+		if (!ana.Result(s).IsNull()) {
+			BRepCheck_ListIteratorOfListOfStatus itl;
+			itl.Initialize(ana.Result(s)->Status());
+			for (; itl.More(); itl.Next()) {
+				if (itl.Value() != BRepCheck_NoError) {
+					if (any_emitted) {
+						str << ", ";
+					}
+					BRepCheck::Print(itl.Value(), str);
+					str.seekp(str.tellp() - (std::streamoff)1);
+					str << " on ";
+					TopAbs::Print(s.ShapeType(), str);
+					BRepTools::Dump(s, str);
+					any_emitted = true;
+				}
+			}
+		}
+		for (TopoDS_Iterator it(s); it.More(); it.Next()) {
+			dump(it.Value());
+		}
+	};
+
+	dump(s);
+
+	Logger::Warning(str.str());
+
+	return false;
+}

src/ifcgeom/kernels/opencascade/base_utils.h

@@ -74,6 +74,7 @@ namespace IfcGeom {
 		TopoDS_Shape apply_transformation(const TopoDS_Shape&, const gp_GTrsf&);
 
 		bool flatten_shape_list(const IfcGeom::ConversionResults& shapes, TopoDS_Shape& result, bool fuse, double tol);
+		bool validate_shape(const TopoDS_Shape&);
 	}
 }
 

src/serializers/SvgSerializer.cpp

@@ -742,6 +742,10 @@ void SvgSerializer::write(const IfcGeom::BRepElement* brep_obj) {
 		compound_local = comp2;
 	}
 
+	if (only_valid_ && !IfcGeom::util::validate_shape(compound_local)) {
+		return;
+	}
+
 	geometry_data data{ compound_local, dash_arrays, trsf, brep_obj->product(), storey, elev, brep_obj->name(), nameElement(storey, brep_obj) };
 
 	if (auto_section_ || auto_elevation_ || section_ref_ || elevation_ref_ || elevation_ref_guid_ || deferred_section_data_) {

src/serializers/SvgSerializer.h

@@ -556,6 +556,7 @@ protected:
 	bool unify_inputs_;
 	bool mirror_y_;
 	bool mirror_x_;
+	bool only_valid_;
 
 	int profile_threshold_;
 
@@ -723,6 +724,14 @@ public:
 		return unify_inputs_;
 	}
 
+	void setOnlyValid(bool b) {
+		only_valid_ = b;
+	}
+
+	bool getOnlyValid(bool b) const {
+		return only_valid_;
+	}
+
 	void setScale(double s) { scale_ = s; }
 	void setDrawingCenter(double x, double y) {
 		center_x_ = x; center_y_ = y;