add the Tiberian Sun harvester unload overlay

OpenRA.Mods.TS/Traits/Render/WithDockingOverlay.cs

@@ -0,0 +1,59 @@
+#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.Graphics;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.TS.Traits
+{
+	[Desc("Rendered on the refinery when a voxel harvester is docking and undocking.")]
+	public class WithDockingOverlayInfo : ITraitInfo, Requires<RenderSpritesInfo>, Requires<BodyOrientationInfo>
+	{
+		[Desc("Sequence name to use")]
+		[SequenceReference] public readonly string Sequence = "unload-overlay";
+
+		[Desc("Position relative to body")]
+		public readonly WVec Offset = WVec.Zero;
+
+		[Desc("Custom palette name")]
+		[PaletteReference("IsPlayerPalette")] public readonly string Palette = null;
+
+		[Desc("Custom palette is a player palette BaseName")]
+		public readonly bool IsPlayerPalette = false;
+
+		public object Create(ActorInitializer init) { return new WithDockingOverlay(init.Self, this); }
+	}
+
+	public class WithDockingOverlay
+	{
+		public readonly WithDockingOverlayInfo Info;
+		public readonly AnimationWithOffset WithOffset;
+
+		public bool Visible;
+
+		public WithDockingOverlay(Actor self, WithDockingOverlayInfo info)
+		{
+			Info = info;
+
+			var rs = self.Trait<RenderSprites>();
+			var body = self.Trait<BodyOrientation>();
+
+			var overlay = new Animation(self.World, rs.GetImage(self));
+			overlay.Play(info.Sequence);
+
+			WithOffset = new AnimationWithOffset(overlay,
+				() => body.LocalToWorld(info.Offset.Rotate(body.QuantizeOrientation(self, self.Orientation))),
+				() => !Visible);
+
+			rs.Add(WithOffset, info.Palette, info.IsPlayerPalette);
+		}
+	}
+}