add company colour type enum for vehicles

Author: LeftofZen

Dat/Objects/Vehicle/VehicleObject.cs

@@ -5,6 +5,21 @@
 
 namespace OpenLoco.Dat.Objects
 {
+	public enum CompanyColourType : uint8_t
+	{
+		None = 0,
+		SteamLoco = 1,
+		DieselLoco = 2,
+		ElectricLoco = 3,
+		MultipleUnit = 4,
+		PassengerRailcar = 5,
+		FreightRailcar = 6,
+		BusAndTram = 7,
+		FreightTruck = 8,
+		Airplane = 9,
+		Ship = 10,
+	}
+
 	[TypeConverter(typeof(ExpandableObjectConverter))]
 	[LocoStructSize(0x15E)]
 	[LocoStructType(ObjectType.Vehicle)]
@@ -21,7 +36,7 @@ public record VehicleObject(
 		[property: LocoStructOffset(0x0A)] uint8_t Reliability,
 		[property: LocoStructOffset(0x0B)] uint8_t RunCostIndex,
 		[property: LocoStructOffset(0x0C)] int16_t RunCostFactor,
-		[property: LocoStructOffset(0x0E)] uint8_t SpecialColourSchemeIndex, // this is an instance property and doesn't need to be saved in the definition as it can be calculated from other properties
+		[property: LocoStructOffset(0x0E)] CompanyColourType SpecialColourSchemeIndex, // this is an instance property and doesn't need to be saved in the definition as it can be calculated from other properties
 		[property: LocoStructOffset(0x0F)] uint8_t NumCompatibleVehicles,
 		[property: LocoStructOffset(0x10), LocoArrayLength(8), LocoStructVariableLoad] List<S5Header> CompatibleVehicles,
 		[property: LocoStructOffset(0x20), LocoArrayLength(4), LocoStructVariableLoad] List<S5Header> RequiredTrackExtras,

Gui/ViewModels/DatTypes/Objects/VehicleViewModel.cs

@@ -30,7 +30,7 @@ public class VehicleViewModel : LocoObjectViewModel<VehicleObject>
 		[Reactive, Category("Cost"), Range(0, int16_t.MaxValue)] public int16_t RunCostFactor { get; set; }
 		[Reactive, Category("<unknown>")] public uint8_t var_04 { get; set; }
 		[Reactive, Category("<unknown>")] public uint8_t var_113 { get; set; }
-		[Reactive, Category("Sprites")] public uint8_t SpecialColourSchemeIndex { get; set; } // called "ColourType" in the loco codebase
+		[Reactive, Category("Sprites")] public CompanyColourType SpecialColourSchemeIndex { get; set; } // called "ColourType" in the loco codebase
 		[Reactive, Category("Sprites"), Editable(false)] public BindingList<VehicleObjectCar> CarComponents { get; set; }
 		[Reactive, Category("Sprites"), Editable(false)] public BindingList<BodySprite> BodySprites { get; set; }
 		[Reactive, Category("Sprites"), Editable(false)] public BindingList<BogieSprite> BogieSprites { get; set; }

Tests/LoadSaveTests.cs

@@ -1006,7 +1006,7 @@ void assertFunc(ILocoObject obj, VehicleObject struc) => Assert.Multiple(() =>
 				Assert.That(struc.Reliability, Is.EqualTo(88), nameof(struc.Reliability));
 				Assert.That(struc.RunCostIndex, Is.EqualTo(4), nameof(struc.RunCostIndex));
 				Assert.That(struc.RunCostFactor, Is.EqualTo(55), nameof(struc.RunCostFactor));
-				Assert.That(struc.SpecialColourSchemeIndex, Is.EqualTo(9), nameof(struc.SpecialColourSchemeIndex));
+				Assert.That(struc.SpecialColourSchemeIndex, Is.EqualTo(CompanyColourType.Airplane), nameof(struc.SpecialColourSchemeIndex));
 				Assert.That(struc.NumCompatibleVehicles, Is.EqualTo(0), nameof(struc.NumCompatibleVehicles));
 				//CollectionAssert.AreEqual(Enumerable.Repeat(0, 8).ToArray(), struc.CompatibleVehicles, nameof(struc.CompatibleVehicles));
 				//CollectionAssert.AreEqual(Enumerable.Repeat(0, 4).ToArray(), struc.RequiredTrackExtras, nameof(struc.RequiredTrackExtras));