diff -r cef43609a374 -r 0133e565e072 src/linetypes/quadrilateral.h
--- a/src/linetypes/quadrilateral.h	Sat Dec 14 23:00:01 2019 +0200
+++ b/src/linetypes/quadrilateral.h	Wed Jan 01 17:45:56 2020 +0200
@@ -20,6 +20,7 @@
 	QVariant getProperty(Property id) const override;
 	SetPropertyResult setProperty(Property id, const QVariant& value) override;
 	QString textRepresentation() const override;
+	void getPolygons(std::vector<gl::Polygon>& polygons, GetPolygonsContext* context) const override;
 private:
 	Point3D points[4] = {{}};
 };