Automatic merge of T1.5.1-1695-gade019506 and 17 pull requests

- Pull request #570 at f11a428: glTF 2.0 support with PBR lighting
- Pull request #900 at 4629736: DMI in 3D cab + two more dials
- Pull request #1030 at d3ae4a2: Refactor settings, in prep for settings exporter
- Pull request #1045 at cc4d53c: Bugfix: Empty Start Time for Explore, and other issues loading from Menu Selection and Content Routes
- Pull request #1052 at 5bbc476: Content Manager: Add axle count, and lowest derail force
- Pull request #1062 at b96d6fa: Train Forces popup Window.
- Pull request #1064 at 9b3415e: Add Train Info tab to Help window (F1)
- Pull request #1066 at 62c89c1: Log derailment, using TraceInformation.
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #1000 at d8d9709: Locomotive operation from control car
- Pull request #1029 at 92c74ef: Superelevation Follow Up Fixes
- Pull request #1057 at 50c3789: Switchable brake system
- Pull request #1069 at 3f153f0: Mouse wheel control only with Alt – Followup for #1051
- Pull request #1070 at f818e40: Fix a NullReferenceException in TCS scripts
- Pull request #1055 at 5c78967: Route Based TTrack Sounds
- Pull request #896 at f1681df: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #1049 at 4dd8c4f: Re-organise document storage and access

Author: openrails-bot

Source/RunActivity/Content/TrainForcesSprites.png

@@ -414,7 +414,14 @@ private void UpdateWheelForceImage(TrainCar car, int carPosition)
         private void UpdateBrakeForceImage(TrainCar car, int carPosition)
         {
             var idx = 0;  // neutral
-            var absForceN = car.BrakeForceN;
+            bool isDynamicBrakes = false;
+
+            var absForceN = Math.Abs(car.BrakeForceN);  // using Math.Abs() for safety and consistency
+            if (car.WagonType == TrainCar.WagonTypes.Engine && Math.Abs(car.DynamicBrakeForceN) > absForceN)
+            {
+                absForceN = Math.Abs(car.DynamicBrakeForceN);
+                isDynamicBrakes = true;
+            }
 
             if (absForceN > 1000f && BrakeForceScaleN > 1000f)  // exclude improbabl values
             {
@@ -425,8 +432,12 @@ private void UpdateBrakeForceImage(TrainCar car, int carPosition)
                 if (idx < 0) { idx = 0; } else if (idx > 9) { idx = 9; }
             }
 
-            if (car.WagonType == TrainCar.WagonTypes.Engine) { BrakeForceBarGraph[carPosition].Source = new Rectangle(1 + idx * BarWidth, BarHight * 2, BarWidth, HalfBarHight); }
-            else { BrakeForceBarGraph[carPosition].Source = new Rectangle(1 + idx * BarWidth, BarHight * 2 + HalfBarHight, BarWidth, HalfBarHight); }
+            if (car.WagonType == TrainCar.WagonTypes.Engine)
+            {
+                if (isDynamicBrakes) { BrakeForceBarGraph[carPosition].Source = new Rectangle(1 + idx * BarWidth, BarHight * 2, BarWidth, HalfBarHight); }
+                else { BrakeForceBarGraph[carPosition].Source = new Rectangle(1 + idx * BarWidth, BarHight * 2 + HalfBarHight, BarWidth, HalfBarHight); }
+            }
+            else { BrakeForceBarGraph[carPosition].Source = new Rectangle(1 + idx * BarWidth, BarHight * 2 + HalfBarHight * 2, BarWidth, HalfBarHight); }
         }
     }
 }