add CarpetBomb trait for 1-pass airstrikes etc

OpenRA.Mods.Cnc/CarpetBomb.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRA.Traits;
+using OpenRA.GameRules;
+
+namespace OpenRA.Mods.Cnc
+{
+	class CarpetBombInfo : ITraitInfo
+	{
+		public readonly string Weapon = null;
+		public readonly int Interval = 0;
+		public readonly int Range = 0;
+
+		public object Create(Actor self) { return new CarpetBomb(self); }
+	}
+
+	class CarpetBomb : ITick
+	{
+		int2 Target;
+		int dropDelay;
+
+		public CarpetBomb(Actor self) { }
+
+		public void SetTarget(int2 targetCell) { Target = targetCell; }
+
+		public void Tick(Actor self)
+		{
+			var info = self.Info.Traits.Get<CarpetBombInfo>();
+
+			if ((self.Location - Target).LengthSquared > info.Range * info.Range)
+				return;
+
+			var limitedAmmo = self.traits.GetOrDefault<LimitedAmmo>();
+			if (limitedAmmo != null && !limitedAmmo.HasAmmo())
+				return;
+
+			if (--dropDelay <= 0)
+			{
+				dropDelay = info.Interval;
+
+				var args = new ProjectileArgs
+				{
+					srcAltitude = self.traits.Get<Unit>().Altitude,
+					destAltitude = 0,
+					src = self.CenterLocation.ToInt2(),
+					dest = self.CenterLocation.ToInt2(),
+					facing = self.traits.Get<Unit>().Facing,
+					firedBy = self,
+					weapon = Rules.Weapons[info.Weapon.ToLowerInvariant()]
+				};
+
+				self.World.Add(args.weapon.Projectile.Create(args));
+			}
+		}
+	}
+}

OpenRA.Mods.Cnc/OpenRA.Mods.Cnc.csproj

@@ -46,6 +46,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="AirstrikePower.cs" />
+    <Compile Include="CarpetBomb.cs" />
     <Compile Include="CriticalBuildingState.cs" />
     <Compile Include="Effects\IonCannon.cs" />
     <Compile Include="IonCannonPower.cs" />