add the sonar pulse

closes #4729

OpenRA.Mods.RA/SupportPowers/SonarPulsePower.cs

@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * 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,
@@ -8,10 +8,22 @@
  */
 #endregion
 
+using OpenRA.Mods.RA.Activities;
+using OpenRA.Mods.RA.Effects;
+using OpenRA.Primitives;
+
 namespace OpenRA.Mods.RA
 {
 	public class SonarPulsePowerInfo : SupportPowerInfo
 	{
+		[Desc("Actor to spawn to reveal the submarines")]
+		public readonly string SonarActor = "sonar";
+
+		[Desc("Amount of time to keep the actor alive")]
+		public readonly int SonarDuration = 250;
+
+		public readonly string SonarPing = "sonpulse.aud";
+
 		public override object Create(ActorInitializer init) { return new SonarPulsePower(init.self, this); }
 	}
 
@@ -22,10 +34,22 @@ namespace OpenRA.Mods.RA
 		{
 			base.Activate(self, order, manager);
 
-			// TODO: Reveal submarines
+			var info = Info as SonarPulsePowerInfo;
 
-			// Should this play for all players?
-			Sound.Play("sonpulse.aud");
+			if (info.SonarActor != null)
+			{
+				self.World.AddFrameEndTask(w =>
+				{
+					var sonar = w.CreateActor(info.SonarActor, new TypeDictionary
+					{
+						new LocationInit(order.TargetLocation),
+						new OwnerInit(self.Owner),
+					});
+					Sound.Play(info.SonarPing, sonar.CenterPosition);
+					sonar.QueueActivity(new Wait(info.SonarDuration));
+					sonar.QueueActivity(new RemoveSelf());
+				});
+			}
 		}
 	}
 }