diff -r 72b456f2f3c2 -r ce81db996275 src/geometry.h
--- a/src/geometry.h	Tue Jun 14 23:04:49 2022 +0300
+++ b/src/geometry.h	Wed Jun 15 12:17:29 2022 +0300
@@ -138,6 +138,7 @@
 LineSegment2D bottom(const QRectF& rectangle);
 LineSegment2D left(const QRectF& rectangle);
 LineSegment2D right(const QRectF& rectangle);
+bool isConvex(const Quadrilateral& quad);
 bool isConvex(const std::vector<glm::vec3>& polygon);
 Winding winding(const QPolygonF& polygon);
 struct ScalingExtract