diff -r 20d2ed3af73d -r 9e18ec63eec3 src/linetypes/polygon.h
--- a/src/linetypes/polygon.h	Sun Nov 03 18:13:38 2019 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,43 +0,0 @@
-#include <array>
-#include "object.h"
-
-namespace linetypes
-{
-	class Triangle;
-	class Quadrilateral;
-}
-
-class linetypes::Triangle : public ColoredObject
-{
-public:
-	Triangle() = default;
-	Triangle(
-		const Vertex &point_1,
-		const Vertex &point_2,
-		const Vertex &point_3,
-		Color colorIndex = colors::main);
-	Triangle(const QVector<Vertex>& vertices, const Color color);
-	QVariant getProperty(Property id) const override;
-	SetPropertyResult setProperty(Property id, const QVariant& value) override;
-	QString textRepresentation() const override;
-private:
-	Vertex points[3] = {{}};
-};
-
-class linetypes::Quadrilateral : public ColoredObject
-{
-public:
-	Quadrilateral() = default;
-	Quadrilateral(
-		const Vertex &point_1,
-		const Vertex &point_2,
-		const Vertex &point_3,
-		const Vertex &point_4,
-		Color colorIndex = colors::main);
-	Quadrilateral(const QVector<Vertex>& vertices, const Color color);
-	QVariant getProperty(Property id) const override;
-	SetPropertyResult setProperty(Property id, const QVariant& value) override;
-	QString textRepresentation() const override;
-private:
-	Vertex points[4] = {{}};
-};