diff -r 27fb1c3c9fbb -r 97b591813c8b src/ldrawalgorithm.h
--- a/src/ldrawalgorithm.h	Sun Mar 13 20:26:28 2022 +0200
+++ b/src/ldrawalgorithm.h	Tue Mar 15 18:52:48 2022 +0200
@@ -17,6 +17,6 @@
 		Diagonal splitType = Diagonal::Diagonal_13
 	) -> std::optional<std::pair<triangleid_t, triangleid_t>>;
 
-	void invert(ModelEditor& editor, ldraw::id_t id);
+	void invert(ModelEditor& editor, ldraw::id_t id, GetPolygonsContext *context);
 	void makeUnofficial(ModelEditor &editor);
 }