Add polygon shape

StructureHelperCommon/Models/Shapes/Vertex.cs

@@ -11,8 +11,17 @@ namespace StructureHelperCommon.Models.Shapes
         {
             Id = id;
         }
+        /// <summary>
+        /// Creates new vertex with id = new Guid
+        /// </summary>
+        /// <param name="x">Coordinate x of vertex</param>
+        /// <param name="y">Coordinate y of vertex</param>
+        public Vertex(double x, double y) : this(Guid.NewGuid())
+        {
+            Point = new Point2D() { X = x, Y = y };
+        }
 
-        public IPoint2D Point { get; set; }
+        public IPoint2D Point { get; set; } = new Point2D(Guid.NewGuid()) { X = 0, Y = 0};
 
     }