Add curvature calculator

StructureHelperLogics/NdmCalculations/Cracking/ICrackForceCalculatorInputData.cs

@@ -1,20 +1,29 @@
 using LoaderCalculator.Data.Ndms;
 using StructureHelperCommon.Models.Calculators;
 using StructureHelperCommon.Models.Forces;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace StructureHelperLogics.NdmCalculations.Cracking
 {
+    /// <summary>
+    /// Implements input data for search of forces of crack appearance in some range of load
+    /// </summary>
     public interface ICrackForceCalculatorInputData: IInputData
     {
-        
+        /// <summary>
+        /// Start tuple of range for search of forces of crack appearance
+        /// </summary>
         IForceTuple StartTuple { get; set; }
+        /// <summary>
+        /// End tuple of range for search of forces of crack appearance
+        /// </summary>
         IForceTuple EndTuple { get; set; }
+        /// <summary>
+        /// Collection of NdmElements for checking of crack appearance
+        /// </summary>
         IEnumerable<INdm> CheckedNdmCollection { get; set; }
+        /// <summary>
+        /// Collection of initial NdmElements of cross-section 
+        /// </summary>
         IEnumerable<INdm> SectionNdmCollection { get; set; }
     }
 }