submarine dive/surface works

OpenRa.Game/Traits/AttackBase.cs

@@ -1,8 +1,7 @@
 using System;
-using System.Linq;
-using OpenRa.Game.Effects;
 using System.Collections.Generic;
 using IjwFramework.Types;
+using OpenRa.Game.Effects;
 
 namespace OpenRa.Game.Traits
 {

OpenRa.Game/Traits/RenderSubmarine.cs

@@ -0,0 +1,54 @@
+using System.Collections.Generic;
+using OpenRa.Game.Graphics;
+
+namespace OpenRa.Game.Traits
+{
+	class RenderSubmarine : RenderSimple, INotifyAttack, ITick
+	{
+		int remainingSurfaceTime = 2;		/* setup for initial dive */
+
+		public RenderSubmarine(Actor self)
+			: base(self)
+		{
+			anim.PlayFacing("idle", () => self.traits.Get<Unit>().Facing);
+		}
+
+		public void Attacking(Actor self)
+		{
+			if (remainingSurfaceTime <= 0)
+				OnSurface();
+
+			remainingSurfaceTime = (int)(Rules.General.SubmergeDelay * 60 / 25);
+		}
+
+		public override IEnumerable<Tuple<Sprite, float2, int>> Render(Actor self)
+		{
+			var s = Util.Centered(self, anim.Image, self.CenterLocation);
+			if (remainingSurfaceTime <= 0)
+			{
+				s.c = 8;	/* shadow only palette */
+				if (self.Owner != Game.LocalPlayer)
+					yield break;	/* can't see someone else's submerged subs */
+			}
+			yield return s;
+		}
+
+		public override void Tick(Actor self)
+		{
+			base.Tick(self);
+			if (remainingSurfaceTime > 0)
+				if (--remainingSurfaceTime <= 0)
+					OnDive();
+		}
+
+		void OnSurface()
+		{
+			Sound.Play("subshow1.aud");
+		}
+
+		void OnDive()
+		{
+			Sound.Play("subshow1.aud");		/* is this the right sound?? */
+		}
+	}
+}