Add TrackObjectFlags as per OpenLoco

Author: LeftofZen

Dat/Loaders/TrackObjectLoader.cs

@@ -156,9 +156,9 @@ internal enum DatTrackTraitFlags : uint16_t
 	internal enum DatTrackObjectFlags : uint16_t
 	{
 		None = 0,
-		unk_00 = 1 << 0,
-		unk_01 = 1 << 1,
-		unk_02 = 1 << 2,
+		HasRackRail = 1 << 0,   // if set road can have rack rail added (not used)
+		NoSlipSurface = 1 << 1, // if set vehicles can't start slipping
+		IsRoad = 1 << 2,        // controls if the object appears in the roads menu instead of the track menu
 	}
 }
 

Definitions/ObjectModels/Objects/Track/TrackObjectFlags.cs

@@ -4,7 +4,7 @@ namespace Definitions.ObjectModels.Objects.Track;
 public enum TrackObjectFlags : uint16_t
 {
 	None = 0,
-	unk_00 = 1 << 0,
-	unk_01 = 1 << 1,
-	unk_02 = 1 << 2,
+	HasRackRail = 1 << 0,   // if set road can have rack rail added (not used)
+	NoSlipSurface = 1 << 1, // if set vehicles can't start slipping
+	IsRoad = 1 << 2,        // controls if the object appears in the roads menu instead of the track menu
 }

Tests/LoadSaveTests.cs

@@ -1116,7 +1116,7 @@ static void assertFunc(LocoObject obj, TrackObject struc)
 				Assert.That(struc.CostIndex, Is.EqualTo(1), nameof(struc.CostIndex));
 				Assert.That(struc.MaxCurveSpeed, Is.EqualTo(400), nameof(struc.MaxCurveSpeed));
 				Assert.That(struc.VehicleDisplayListVerticalOffset, Is.EqualTo(3), nameof(struc.VehicleDisplayListVerticalOffset));
-				Assert.That(struc.Flags, Is.EqualTo(TrackObjectFlags.unk_00), nameof(struc.Flags));
+				Assert.That(struc.Flags, Is.EqualTo(TrackObjectFlags.HasRackRail), nameof(struc.Flags));
 				// Mods
 				Assert.That(struc.Bridges, Has.Count.EqualTo(5), nameof(struc.Bridges));
 				Assert.That(struc.TracksAndRoads, Has.Count.EqualTo(7), nameof(struc.TracksAndRoads));