Interpolation of results was added

StructureHelperLogics/Services/NdmCalculations/InterpolateService.cs

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+using StructureHelperCommon.Models.Forces;
+using StructureHelperCommon.Services.Forces;
+using StructureHelperLogics.Models.Primitives;
+using StructureHelperLogics.NdmCalculations.Analyses.ByForces;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructureHelperLogics.Services.NdmCalculations
+{
+    public static class InterpolateService
+    {
+        public static IForceCalculator InterpolateForceCalculator(IForceCalculator source, IDesignForceTuple sourceTuple, int stepCount)
+        {
+            IForceCalculator calculator = new ForceCalculator();
+            calculator.LimitStatesList.Clear();
+            calculator.LimitStatesList.Add(sourceTuple.LimitState);
+            calculator.CalcTermsList.Clear();
+            calculator.CalcTermsList.Add(sourceTuple.CalcTerm);
+            calculator.IterationAccuracy = source.IterationAccuracy;
+            calculator.MaxIterationCount = source.MaxIterationCount;
+            calculator.Primitives.AddRange(source.Primitives);
+            calculator.ForceCombinationLists.Clear();
+            var combination = new ForceCombinationList()
+            {
+                Name = "New combination",
+                SetInGravityCenter = false
+            };
+            combination.DesignForces.Clear();
+            combination.DesignForces.AddRange(TupleService.InterpolateDesignTuple(sourceTuple, stepCount));
+            combination.ForcePoint.X = 0;
+            combination.ForcePoint.Y = 0;
+            calculator.ForceCombinationLists.Add(combination);
+            return calculator;
+        }
+    }
+}