Produce D2k carryalls at the edge of the map

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

@@ -73,6 +73,7 @@
     <Compile Include="SpriteLoaders\R8Loader.cs" />
     <Compile Include="Traits\AttackSwallow.cs" />
     <Compile Include="Traits\AutoCarryall.cs" />
+    <Compile Include="Traits\Buildings\ProductionFromMapEdge.cs" />
     <Compile Include="Traits\Buildings\DamagedWithoutFoundation.cs" />
     <Compile Include="Traits\Buildings\LaysTerrain.cs" />
     <Compile Include="Traits\Carryable.cs" />

OpenRA.Mods.D2k/Traits/Buildings/ProductionFromMapEdge.cs

@@ -0,0 +1,82 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.D2k.Traits
+{
+	[Desc("Produce a unit on the closest map edge cell and move into the world.")]
+	class ProductionFromMapEdgeInfo : ProductionInfo
+	{
+		public override object Create(ActorInitializer init) { return new ProductionFromMapEdge(init, this); }
+	}
+
+	class ProductionFromMapEdge : Production
+	{
+		public ProductionFromMapEdge(ActorInitializer init, ProductionInfo info)
+			: base(init, info) { }
+
+		public override bool Produce(Actor self, ActorInfo producee, string raceVariant)
+		{
+			var location = self.World.Map.ChooseClosestEdgeCell(self.Location);
+			var pos = self.World.Map.CenterOfCell(location);
+
+			// If aircraft, spawn at cruise altitude
+			var aircraftInfo = producee.Traits.GetOrDefault<AircraftInfo>();
+			if (aircraftInfo != null)
+				pos += new WVec(0, 0, aircraftInfo.CruiseAltitude.Range);
+
+			var initialFacing = self.World.Map.FacingBetween(location, self.Location, 0);
+
+			self.World.AddFrameEndTask(w =>
+				{
+					var td = new TypeDictionary
+					{
+						new OwnerInit(self.Owner),
+						new LocationInit(location),
+						new CenterPositionInit(pos),
+						new FacingInit(initialFacing)
+					};
+
+					if (raceVariant != null)
+						td.Add(new RaceInit(raceVariant));
+
+					var newUnit = self.World.CreateActor(producee.Name, td);
+
+					var move = newUnit.TraitOrDefault<IMove>();
+					if (move != null)
+						newUnit.QueueActivity(move.MoveIntoWorld(newUnit, self.Location));
+
+					newUnit.SetTargetLine(Target.FromCell(self.World, self.Location), Color.Green, false);
+
+					if (!self.IsDead)
+						foreach (var t in self.TraitsImplementing<INotifyProduction>())
+							t.UnitProduced(self, newUnit, self.Location);
+
+					var notifyOthers = self.World.ActorsWithTrait<INotifyOtherProduction>();
+					foreach (var notify in notifyOthers)
+						notify.Trait.UnitProducedByOther(notify.Actor, self, newUnit);
+
+					var bi = newUnit.Info.Traits.GetOrDefault<BuildableInfo>();
+					if (bi != null && bi.InitialActivity != null)
+						newUnit.QueueActivity(Game.CreateObject<Activity>(bi.InitialActivity));
+
+					foreach (var t in newUnit.TraitsImplementing<INotifyBuildComplete>())
+						t.BuildingComplete(newUnit);
+				});
+
+			return true;
+		}
+	}
+}