Automatic merge of T1.5.1-1806-g5522fc5fa and 11 pull requests

- Pull request #570 at 362e4e7: glTF 2.0 support with PBR lighting
- Pull request #1062 at bbc0013: Train Forces popup Window.
- Pull request #1064 at fb4a500: Add Train Info tab to Help window (F1)
- Pull request #1067 at f385422: Traction and dynamic brake retardation
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #1074 at e9a66c1: Gradient - commit 2024-16-12
- Pull request #1076 at 3bbd537: Allow depart early
- Pull request #1085 at 37e2817: updates key commands for Train Operations window and also Daylight Offset
- Pull request #1086 at e10390b: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #1081 at 689494b: Brake cuts power unification

Author: openrails-bot

Source/RunActivity/Viewer3D/Popups/HelpWindow.cs

@@ -1263,7 +1263,7 @@ private void AddAggregatedTrainInfo(Train playerTrain, ControlLayout scrollbox,
                 if (wag != null)
                 {
                     maxBrakeForceN += wag.MaxBrakeForceN;
-                    var couplerStrength = GetMinCouplerStrenght(wag);
+                    var couplerStrength = GetMinCouplerStrength(wag);
                     if (couplerStrength < lowestCouplerStrengthN) { lowestCouplerStrengthN = couplerStrength; }
                     var derailForce = GetDerailForce(wag);
                     if (derailForce < lowestDerailForceN) { lowestDerailForceN = derailForce; }
@@ -1386,12 +1386,15 @@ private void AddAggregatedTrainInfo(Train playerTrain, ControlLayout scrollbox,
         /// <summary>
         /// Get the lowest coupler strength for a car.
         /// </summary>
-        private float GetMinCouplerStrenght(MSTSWagon wag)
+        private float GetMinCouplerStrength(MSTSWagon wag)
         {
             float couplerStrength = 1e10f;  // default from TrainCar.GetCouplerBreak2N()
-            if (wag.Couplers.Count > 1 && wag.Couplers[1].Break2N < couplerStrength) { couplerStrength = wag.Couplers[1].Break2N; }
-            else if (wag.Couplers.Count > 0 && wag.Couplers[0].Break2N < couplerStrength) { couplerStrength = wag.Couplers[0].Break2N; }
-            if (couplerStrength < 99f) { couplerStrength = 1e10f; }  // use default if near zero
+            foreach (var coupler in wag.Couplers)
+            {
+                // ignore unrealistically low values; some cars have Break2N lower than Break1N
+                if (coupler.Break1N > 99f && coupler.Break1N < couplerStrength) { couplerStrength = coupler.Break1N; }
+                if (coupler.Break2N > 99f && coupler.Break2N < couplerStrength) { couplerStrength = coupler.Break2N; }
+            }
             return couplerStrength;
         }