implement Ordos nerve gas missiles as warheads

closes #2838

OpenRA.Mods.D2k/ChangeOwnerWarhead.cs

@@ -0,0 +1,50 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Collections.Generic;
+using OpenRA.GameRules;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.D2k
+{
+	[Desc("Interacts with the DynamicOwnerChange trait.")]
+	public class ChangeOwnerWarhead : Warhead
+	{
+		[Desc("Duration of the owner change (in ticks). Set to 0 to make it permanent.")]
+		public readonly int Duration = 0;
+
+		public readonly WRange Range = WRange.FromCells(1);
+
+		public override void DoImpact(Target target, Actor firedBy, IEnumerable<int> damageModifiers)
+		{
+			var actors = target.Type == TargetType.Actor ? new[] { target.Actor } :
+				firedBy.World.FindActorsInCircle(target.CenterPosition, Range);
+
+			foreach (var a in actors)
+			{
+				if (a.Owner == firedBy.Owner) // don't do anything on friendly fire
+					continue;
+
+				if (Duration == 0)
+					a.ChangeOwner(firedBy.Owner); // permanent
+				else
+				{
+					var tempOwnerManager = a.TraitOrDefault<TemporaryOwnerManager>();
+					if (tempOwnerManager == null)
+						continue;
+
+					tempOwnerManager.ChangeOwner(a, firedBy.Owner, Duration);
+				}
+
+				a.CancelActivity(); // stop shooting, you have got new enemies
+			}
+		}
+	}
+}

OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj

@@ -92,6 +92,8 @@
     <Compile Include="AutoCarryall\Carryable.cs" />
     <Compile Include="AutoCarryall\CarryUnit.cs" />
     <Compile Include="WormManager.cs" />
+    <Compile Include="ChangeOwnerWarhead.cs" />
+    <Compile Include="TemporaryOwnerManager.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>

OpenRA.Mods.D2k/TemporaryOwnerManager.cs

@@ -0,0 +1,82 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System.Drawing;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.D2k
+{
+	[Desc("Interacts with the ChangeOwner warhead.",
+		"Displays a bar how long this actor is affected and reverts back to the old owner on temporary changes.")]
+	public class TemporaryOwnerManagerInfo : ITraitInfo
+	{
+		public readonly Color BarColor = Color.Orange;
+
+		public object Create(ActorInitializer init) { return new TemporaryOwnerManager(init.self, this); }
+	}
+
+	public class TemporaryOwnerManager : ISelectionBar, ITick, ISync, INotifyOwnerChanged
+	{
+		readonly TemporaryOwnerManagerInfo info;
+
+		Player originalOwner;
+		Player changingOwner;
+
+		[Sync] int remaining = -1;
+		int duration;
+
+		public TemporaryOwnerManager(Actor self, TemporaryOwnerManagerInfo info)
+		{
+			this.info = info;
+			originalOwner = self.Owner;
+		}
+
+		public void ChangeOwner(Actor self, Player newOwner, int duration)
+		{
+			remaining = this.duration = duration;
+			changingOwner = newOwner;
+			self.ChangeOwner(newOwner);
+		}
+
+		public void Tick(Actor self)
+		{
+			if (!self.IsInWorld)
+				return;
+
+			if (--remaining == 0)
+			{
+				changingOwner = originalOwner;
+				self.ChangeOwner(originalOwner);
+				self.CancelActivity(); // Stop shooting, you have got new enemies
+			}
+		}
+
+		public void OnOwnerChanged(Actor self, Player oldOwner, Player newOwner)
+		{
+			if (changingOwner == null || changingOwner != newOwner)
+				originalOwner = newOwner; // It wasn't a temporary change, so we need to update here
+			else
+				changingOwner = null; // It was triggered by this trait: reset
+		}
+
+		public float GetValue()
+		{
+			if (remaining <= 0)
+				return 0;
+
+			return (float)remaining / duration;
+		}
+
+		public Color GetColor()
+		{
+			return info.BarColor;
+		}
+	}
+}

OpenRA.Mods.RA/Attack/AttackLoyalty.cs

@@ -1,45 +0,0 @@
-#region Copyright & License Information
-/*
- * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
- * This file is part of OpenRA, which is free software. It is made
- * available to you under the terms of the GNU General Public License
- * as published by the Free Software Foundation. For more information,
- * see COPYING.
- */
-#endregion
-
-using System.Linq;
-using OpenRA.Traits;
-
-namespace OpenRA.Mods.RA
-{
-	public class AttackLoyaltyInfo : AttackFrontalInfo
-	{
-		public override object Create(ActorInitializer init) { return new AttackLoyalty(init.self, this); }
-	}
-
-	public class AttackLoyalty : AttackFrontal
-	{
-		public AttackLoyalty(Actor self, AttackLoyaltyInfo info)
-			: base(self, info) { }
-
-		public override void DoAttack(Actor self, Target target)
-		{
-			if (!CanAttack(self, target))
-				return;
-
-			var arm = Armaments.FirstOrDefault();
-			if (arm == null)
-				return;
-
-			if (!target.IsInRange(self.CenterPosition, arm.Weapon.Range))
-				return;
-
-			foreach (var a in Armaments)
-				a.CheckFire(self, facing.Value, target);
-
-			if (target.Actor != null)
-				target.Actor.ChangeOwner(self.Owner);
-		}
-	}
-}

OpenRA.Mods.RA/OpenRA.Mods.RA.csproj

@@ -146,7 +146,6 @@
     <Compile Include="Attack\AttackBase.cs" />
     <Compile Include="Attack\AttackFrontal.cs" />
     <Compile Include="Attack\AttackLeap.cs" />
-    <Compile Include="Attack\AttackLoyalty.cs" />
     <Compile Include="Attack\AttackMedic.cs" />
     <Compile Include="Attack\AttackOmni.cs" />
     <Compile Include="Attack\AttackPopupTurreted.cs" />

mods/d2k/rules/defaults.yaml

@@ -47,6 +47,7 @@
 		UpgradeTypes: selfheal
 		UpgradeMinEnabledLevel: 1
 	UpgradeManager:
+	TemporaryOwnerManager:
 
 ^Tank:
 	AppearsOnRadar:
@@ -97,6 +98,7 @@
 		UpgradeTypes: selfheal
 		UpgradeMinEnabledLevel: 1
 	UpgradeManager:
+	TemporaryOwnerManager:
 
 ^Husk:
 	Health:

mods/d2k/rules/ordos.yaml

@@ -234,9 +234,9 @@ DEVIATORTANK:
 		Range: 5c0
 	RenderUnit:
 	Armament:
-		Weapon: FakeMissile
+		Weapon: NerveGasMissile
 		LocalOffset: -299,0,85
-	AttackLoyalty:
+	AttackFrontal:
 	AutoTarget:
 		InitialStance: Defend
 	Explodes:

mods/d2k/weapons.yaml

@@ -366,7 +366,7 @@ DevBullet:
 		Explosion: mini_explosion
 		ImpactSound: EXPLMD3.WAV
 
-FakeMissile:
+NerveGasMissile:
 	ReloadDelay: 120
 	Range: 8c0
 	Burst: 1
@@ -392,6 +392,9 @@ FakeMissile:
 	Warhead@3Eff: CreateEffect
 		Explosion: deviator
 		ImpactSound: EXPLSML2.WAV
+	Warhead@4OwnerChange: ChangeOwner
+		Range: 1c0
+		Duration: 750
 
 155mm:
 	ReloadDelay: 75