Don't sew overly complex geometries even as part of boolean operations #455

src/ifcgeom/IfcGeom.h

@@ -73,6 +73,23 @@ if ( it != cache.T.end() ) { e = it->second; return true; }
 #endif
 
 namespace IfcGeom {
+	class IFC_PARSE_API geometry_exception : public std::exception {
+	protected:
+		std::string message;
+	public:
+		geometry_exception(const std::string& m)
+			: message(m) {}
+		virtual ~geometry_exception() throw () {}
+		virtual const char* what() const throw() {
+			return message.c_str();
+		}
+	};
+
+	class IFC_PARSE_API too_many_faces_exception : public geometry_exception {
+	public:
+		too_many_faces_exception()
+			: geometry_exception("Too many faces for operation") {}
+	};
 
 class IFC_GEOM_API Cache {
 public: