diff -r c1ff4f107569 -r 24590af32ad6 src/ui/canvas.cpp
--- a/src/ui/canvas.cpp	Sat Mar 05 15:40:43 2022 +0200
+++ b/src/ui/canvas.cpp	Sat Mar 05 16:57:28 2022 +0200
@@ -240,6 +240,11 @@
 	painter->drawPolygon(QPolygonF{this->convertWorldPointsToScreenPoints(points)});
 }
 
+Winding Canvas::worldPolygonWinding(const std::vector<glm::vec3> &points) const
+{
+	return geom::winding(QPolygonF{this->convertWorldPointsToScreenPoints(points)});
+}
+
 /**
  * @brief Gets the current position of the cursor in the model
  * @return 3D vector
@@ -326,7 +331,7 @@
 	return std::abs(dot) < threshold;
 }
 
-QVector<QPointF> Canvas::convertWorldPointsToScreenPoints(const std::vector<glm::vec3> &worldPoints)
+QVector<QPointF> Canvas::convertWorldPointsToScreenPoints(const std::vector<glm::vec3> &worldPoints) const
 {
 	QVector<QPointF> points2d;
 	points2d.reserve(worldPoints.size());