C4 demolishable bridges

CHANGELOG

@@ -1,4 +1,10 @@
 NEW:
+	Dune 2000:
+		Added the Atreides grenadier from the 1.06 patch.
+	Red Alert:
+		Tanya can now plant C4 on bridges.
+	Tiberian Dawn:
+		Commando can now plant C4 on bridges.
 	Engine:
 		Converted Aircraft CruiseAltitude to world coordinates.
 		Converted Health Radius to world coordinates.
@@ -9,8 +15,7 @@ NEW:
 		Altitude is no longer parsed from actor templates in maps. Specify CenterPosition instead.
 		Run `OpenRA.Utility.exe --upgrade-mod <mod> 20131223` to automatically upgrade mod rules.
 		Run `OpenRA.Utility.exe --upgrade-map <map path> 20131223` to automatically upgrade custom map rules.
-	Dune 2000:
-		Added the Atreides grenadier from the 1.06 patch.
+		Added a new trait Demolishable for buildings to handle the C4 demolition.
 
 20131223:
 	All mods:

OpenRA.Game/Traits/TraitsInterfaces.cs

@@ -77,6 +77,11 @@ namespace OpenRA.Traits
 	public interface INotifyHarvest { void Harvested(Actor self, ResourceType resource); }
 
 	public interface IAcceptInfiltrator { void OnInfiltrate(Actor self, Actor infiltrator); }
+	public interface IDemolishable
+	{
+		void Demolish(Actor self, Actor saboteur);
+		bool IsValidTarget(Actor self, Actor saboteur);
+	}
 	public interface IStoreOre { int Capacity { get; } }
 	public interface IToolTip
 	{

OpenRA.Mods.RA/Activities/Demolish.cs

@@ -41,8 +41,12 @@ namespace OpenRA.Mods.RA.Activities
 					.Concat(self.Owner.PlayerActor.TraitsImplementing<IDamageModifier>())
 					.Select(t => t.GetDamageModifier(self, null)).Product();
 
+				var demolishable = target.Actor.TraitOrDefault<IDemolishable>();
+					if (demolishable == null || !demolishable.IsValidTarget(target.Actor, self))
+					return;
+
 				if (modifier > 0)
-					target.Actor.Kill(self);
+					demolishable.Demolish(target.Actor, self);
 			})));
 
 			return NextActivity;

OpenRA.Mods.RA/Bridge.cs

@@ -288,5 +288,13 @@ namespace OpenRA.Mods.RA
 
 			return damage;
 		}
+
+		public void Demolish(Actor saboteur)
+		{
+			// TODO: completely destroy long bridges in a chain reaction
+			Combat.DoExplosion(saboteur, "Demolish", self.CenterPosition);
+			self.World.WorldActor.Trait<ScreenShaker>().AddEffect(15, self.CenterPosition, 6);
+			self.Kill(saboteur);
+		}
 	}
 }

OpenRA.Mods.RA/BridgeHut.cs

@@ -17,7 +17,7 @@ namespace OpenRA.Mods.RA
 		public object Create(ActorInitializer init) { return new BridgeHut(init); }
 	}
 
-	class BridgeHut
+	class BridgeHut : IDemolishable
 	{
 		public Bridge bridge;
 
@@ -31,6 +31,16 @@ namespace OpenRA.Mods.RA
 			bridge.Repair(repairer, true, true);
 		}
 
+		public void Demolish(Actor self, Actor saboteur)
+		{
+			bridge.Demolish(saboteur);
+		}
+
+		public bool IsValidTarget(Actor self, Actor saboteur)
+		{
+			return BridgeDamageState == DamageState.Undamaged;
+		}
+
 		public DamageState BridgeDamageState { get { return bridge.AggregateDamageState(); } }
 	}
 }

OpenRA.Mods.RA/Buildings/Demolishable.cs

@@ -0,0 +1,34 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2013 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;
+using OpenRA.Traits;
+using OpenRA.FileFormats;
+
+namespace OpenRA.Mods.RA
+{
+	[Desc("Handle demolitions from C4 explosives.")]
+	public class DemolishableInfo : TraitInfo<Demolishable> { }
+
+	public class Demolishable : IDemolishable
+	{
+		public Demolishable() { }
+
+		public void Demolish(Actor self, Actor saboteur)
+		{
+			self.Kill(saboteur);
+		}
+
+		public bool IsValidTarget(Actor self, Actor saboteur)
+		{
+			return true;
+		}
+	}
+}
+

OpenRA.Mods.RA/C4Demolition.cs

@@ -56,6 +56,10 @@ namespace OpenRA.Mods.RA
 			if (target.Type != TargetType.Actor)
 				return;
 
+			var demolishable = order.TargetActor.TraitOrDefault<IDemolishable>();
+			if (demolishable == null || !demolishable.IsValidTarget(target.Actor, self))
+				return;
+
 			if (!order.Queued)
 				self.CancelActivity();
 

OpenRA.Mods.RA/Missions/Soviet01ClassicScript.cs

@@ -125,12 +125,8 @@ namespace OpenRA.Mods.RA.Missions
 			startJeep.QueueActivity(new Turn(128));
 			startJeep.QueueActivity(new CallFunc(() =>
 			{
-				var bridge = world.Actors
-					.Where(a => a.HasTrait<Bridge>() && !a.IsDead())
-					.ClosestTo(startJeep);
-				Combat.DoExplosion(bridge, "Demolish", bridge.CenterPosition);
-				world.WorldActor.Trait<ScreenShaker>().AddEffect(15, bridge.CenterPosition, 6);
-				bridge.Kill(bridge);
+				var bridge = world.Actors.Where(a => a.HasTrait<BridgeHut>()).ClosestTo(startJeep);
+				bridge.Trait<BridgeHut>().Demolish(bridge, startJeep);
 			}));
 		}
 

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

@@ -484,6 +484,7 @@
     <Compile Include="Effects\Rank.cs" />
     <Compile Include="ShroudRenderer.cs" />
     <Compile Include="Render\WithCrateBody.cs" />
+    <Compile Include="Buildings\Demolishable.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">

mods/cnc/rules/civilian.yaml

@@ -363,7 +363,7 @@ BRIDGEHUT:
 		Bounds: 48,48
 	BridgeHut:
 	TargetableBuilding:
-		TargetTypes: BridgeHut
+		TargetTypes: BridgeHut, C4
 
 C1:
 	Inherits: ^CivInfantry
@@ -455,4 +455,3 @@ VICE:
 		QuantizedFacings: 8
 	PoisonedByTiberium:
 		Weapon: Heal
-

mods/cnc/rules/defaults.yaml

@@ -353,6 +353,7 @@
 	EngineerRepairable:
 	Huntable:
 	LuaScriptEvents:
+	Demolishable:
 
 ^CivBuilding:
 	Inherits: ^Building
@@ -456,6 +457,7 @@
 	BodyOrientation:
 	FrozenUnderFog:
 	LuaScriptEvents:
+	Demolishable:
 
 ^Tree:
 	Tooltip:

mods/cnc/weapons.yaml

@@ -1027,3 +1027,7 @@ Claw:
 		InfDeath: 1
 		Damage: 60
 
+Demolish:
+	Warhead:
+		ImpactSound: xplobig6.aud
+		Explosion: building

mods/d2k/rules/defaults.yaml

@@ -249,4 +249,4 @@
 	WithCrumbleOverlay:
 	Huntable:
 	LuaScriptEvents:
-
+	Demolishable:

mods/d2k/rules/structures.yaml

@@ -384,6 +384,7 @@
 	Sellable:
 	Guardable:
 	BodyOrientation:
+	Demolishable:
 
 WALL:
 	Inherits: ^WALL

mods/ra/rules/civilian.yaml

@@ -488,7 +488,7 @@ BRIDGEHUT:
 		Bounds: 48,48
 	BridgeHut:
 	TargetableBuilding:
-		TargetTypes: BridgeHut
+		TargetTypes: BridgeHut, C4
 
 BRIDGEHUT.small:
 	Building:
@@ -499,7 +499,7 @@ BRIDGEHUT.small:
 		Bounds: 24,24
 	BridgeHut:
 	TargetableBuilding:
-		TargetTypes: BridgeHut
+		TargetTypes: BridgeHut, C4
 
 V20:
 	Inherits: ^DesertCivBuilding

mods/ra/rules/defaults.yaml

@@ -264,6 +264,7 @@
 		String: Structure
 	Huntable:
 	LuaScriptEvents:
+	Demolishable:
 
 ^Wall:
 	AppearsOnRadar:
@@ -300,6 +301,7 @@
 	BodyOrientation:
 	FrozenUnderFog:
 	LuaScriptEvents:
+	Demolishable:
 
 ^TechBuilding:
 	Inherits: ^Building

mods/ts/rules/defaults.yaml

@@ -36,6 +36,7 @@
 	BodyOrientation:
 	Huntable:
 	LuaScriptEvents:
+	Demolishable:
 
 ^Infantry:
 	AppearsOnRadar:
@@ -176,6 +177,7 @@
 	UpdatesPlayerStatistics:
 	BodyOrientation:
 	LuaScriptEvents:
+	Demolishable:
 
 ^Helicopter:
 	AppearsOnRadar: