Logic for interaction diagram was added

StructureHelperCommon/Models/Shapes/Logics/IConvert2DPointTo3DPointLogic.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+//Copyright (c) 2023 Redikultsev Evgeny, Ekaterinburg, Russia
+//All rights reserved.
+
+namespace StructureHelperCommon.Models.Shapes
+{
+    /// <summary>
+    /// Logic for convert 2DPoint of some plane to point of 3DSpace
+    /// </summary>
+    public interface IConvert2DPointTo3DPointLogic
+    {
+        /// <summary>
+        /// Returns point in 3D-space by 2D point in some workplane
+        /// </summary>
+        /// <param name="point2D"></param>
+        /// <returns></returns>
+        IPoint3D GetPoint3D(IPoint2D point2D);
+    }
+}