LinePrimitive and RectanglePrimitive was added

StructureHelperLogics/Models/Primitives/IPrimitive.cs

@@ -0,0 +1,20 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperCommon.Infrastructures.Interfaces;
+using StructureHelperCommon.Models.Shapes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Models.Primitives
+{
+    public interface IPrimitive : ISaveable, ICloneable
+    {
+        string Name { get; set; }
+        ICenter Center { get; }
+        IShape Shape { get; }
+        
+        IEnumerable<INdmPrimitive> GetNdmPrimitives();
+    }
+}