Bugfix to prevent heading errors on closing element

Set Heading tolerance to one arcsecond

Author: EMS90

TRA.Lib/settings.json

@@ -1,6 +1,6 @@
 {
   "StationMismatchTolerance": 1E-06,
   "ConnectivityMismatchTolerance": 1E-04,
-  "ContinuityOfHeadingTolerance": 2.7E-4,
+  "ContinuityOfHeadingTolerance": 4.85E-6,
   "ContinuityOfCurvatureTolerance": 1E-08
 }

TRA.Tool/TransformPanelBase.cs

@@ -123,6 +123,10 @@ private void TrassenTransform(TRATrasse trasse, TransformSetup transformSetup)
                 {
                 }
             }
+            //Set Heading to End element as this is only an empty Geometry and we started to iterate reverse heading could not be calculated. Set heading from the second last element
+            double heading = 0;
+            (_,_,heading) = trasse.Elemente[^2].GetPointAtS(trasse.Elemente[^2].L, true);
+            trasse.Elemente.Last().T = heading;
             //Try Removing unnecessary KSprung-Elements.This can happen if previous scale was saved to TRA using KSprung, and inverted Transform was applied. Else Update
             foreach (TrassenElementExt element in trasse.Elemente)
             {