diff -r f69d53c053df -r a23024fc98e0 src/ui/polygonobjecteditor.h
--- a/src/ui/polygonobjecteditor.h	Wed Mar 09 14:22:22 2022 +0200
+++ b/src/ui/polygonobjecteditor.h	Sun Mar 13 14:51:39 2022 +0200
@@ -13,12 +13,14 @@
 	~PolygonObjectEditor();
 	ldraw::id_t objectId() const;
 	void setObjectId(ldraw::id_t id);
+	void clear();
 private:
 	void buildWidgets();
 	void setupPointWidget(int n);
 	Q_SLOT void pointChanged(const glm::vec3& value);
 	Document* document;
 	ldraw::id_t storedObjectId;
-	std::vector<std::unique_ptr<QWidget>> widgets;
+	std::vector<std::unique_ptr<Vec3Editor>> widgets;
 	std::optional<QSplitter> splitter;
+	class QFormLayout* formLayout = nullptr;
 };