Moves some misc traits/activities to Mods.Common, moves some RA traits into the Traits folder

OpenRA.Mods.RA/Traits/Parachutable.cs

@@ -0,0 +1,88 @@
+#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 OpenRA.Mods.Common.Effects;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Traits
+{
+	[Desc("Can be paradropped by a ParaDrop actor.")]
+	class ParachutableInfo : ITraitInfo
+	{
+		[Desc("If we land on invalid terrain for my actor type should we be killed?")]
+		public readonly bool KilledOnImpassableTerrain = true;
+
+		public readonly string GroundImpactSound = null;
+		public readonly string GroundCorpseSequence = "corpse";
+		public readonly string GroundCorpsePalette = "effect";
+
+		public readonly string WaterImpactSound = null;
+		public readonly string WaterCorpseSequence = "small_splash";
+		public readonly string WaterCorpsePalette = "effect";
+
+		[Desc("Requires the sub-sequences \"open\" and \"idle\".")]
+		public readonly string ParachuteSequence = null;
+
+		[Desc("Optional, otherwise defaults to the palette the actor is using.")]
+		public readonly string ParachutePalette = null;
+
+		[Desc("Used to clone the actor with this palette and render it with a visual offset below.")]
+		public readonly string ParachuteShadowPalette = "shadow";
+
+		public readonly WVec ParachuteOffset = WVec.Zero;
+
+		public readonly int FallRate = 13;
+
+		[Desc("Alternative to ParachuteShadowPalette which disables it and allows to set a custom sprite sequence instead.")]
+		public readonly string ShadowSequence = null;
+
+		[Desc("Optional, otherwise defaults to the palette the actor is using.")]
+		public readonly string ShadowPalette = null;
+
+		public object Create(ActorInitializer init) { return new Parachutable(init, this); }
+	}
+
+	class Parachutable : INotifyParachuteLanded
+	{
+		readonly Actor self;
+		readonly ParachutableInfo info;
+		readonly IPositionable positionable;
+
+		public Parachutable(ActorInitializer init, ParachutableInfo info)
+		{
+			this.self = init.Self;
+			this.info = info;
+
+			positionable = self.TraitOrDefault<IPositionable>();
+		}
+
+		public void OnLanded()
+		{
+			if (!info.KilledOnImpassableTerrain)
+				return;
+
+			if (positionable.CanEnterCell(self.Location, self))
+				return;
+
+			var terrain = self.World.Map.GetTerrainInfo(self.Location);
+
+			var sound = terrain.IsWater ? info.WaterImpactSound : info.GroundImpactSound;
+			Sound.Play(sound, self.CenterPosition);
+
+			var sequence = terrain.IsWater ? info.WaterCorpseSequence : info.GroundCorpseSequence;
+			var palette = terrain.IsWater ? info.WaterCorpsePalette : info.GroundCorpsePalette;
+			if (sequence != null && palette != null)
+				self.World.AddFrameEndTask(w => w.Add(new Explosion(w, self.OccupiesSpace.CenterPosition, sequence, palette)));
+
+			self.Kill(self);
+		}
+	}
+}