From 2cc1633ee9b66c6138b2d090e5ce695c072d1769 Mon Sep 17 00:00:00 2001
From: katehryhorenko <kate@hypar.io>
Date: Wed, 13 Sep 2023 14:19:33 -0300
Subject: [PATCH] Polygon: delete last vertex if it equals the first one

---
 Elements/src/Geometry/Polygon.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Elements/src/Geometry/Polygon.cs b/Elements/src/Geometry/Polygon.cs
index fa0e11f2d..4b9ccf43a 100644
--- a/Elements/src/Geometry/Polygon.cs
+++ b/Elements/src/Geometry/Polygon.cs
@@ -77,6 +77,12 @@ protected override void ValidateVertices()
 
             this.Vertices = Vector3.RemoveSequentialDuplicates(this.Vertices, true);
             DeleteVerticesForOverlappingEdges();
+
+            if (Vertices.Count > 3 && Vertices[Vertices.Count - 1].IsAlmostEqualTo(Vertices[0]))
+            {
+                Vertices.RemoveAt(Vertices.Count - 1);
+            }
+
             if (this.Vertices.Count < 3)
             {
                 throw new ArgumentException("The polygon could not be created. At least 3 vertices are required.");