Add polygon shape

StructureHelperLogics/NdmCalculations/Primitives/Logics/MeshNDMLogic.cs

@@ -0,0 +1,15 @@
+using LoaderCalculator.Data.Ndms;
+using StructureHelperLogics.NdmCalculations.Triangulations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.NdmCalculations.Primitives
+{
+    public interface MeshNDMLogic
+    {
+        IEnumerable<INdm> GetNdms(ITriangulationOptions triangulation);
+    }
+}