Add WithNukeLaunchAnimation and -Overlay traits.

OpenRA.Mods.Common/Traits/Render/WithNukeLaunchOverlay.cs

@@ -0,0 +1,77 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2017 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Effects;
+using OpenRA.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits.Render
+{
+	[Desc("Displays an overlay when `NukePower` is triggered.")]
+	public class WithNukeLaunchOverlayInfo : ConditionalTraitInfo, Requires<RenderSpritesInfo>, Requires<BodyOrientationInfo>
+	{
+		[Desc("Sequence name to use")]
+		[SequenceReference] public readonly string Sequence = "active";
+
+		[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 override object Create(ActorInitializer init) { return new WithNukeLaunchOverlay(init.Self, this); }
+	}
+
+	public class WithNukeLaunchOverlay : ConditionalTrait<WithNukeLaunchOverlayInfo>, INotifyBuildComplete, INotifySold, INotifyNuke
+	{
+		readonly Animation overlay;
+		bool buildComplete;
+		bool visible;
+
+		public WithNukeLaunchOverlay(Actor self, WithNukeLaunchOverlayInfo info)
+			: base(info)
+		{
+			var rs = self.Trait<RenderSprites>();
+			var body = self.Trait<BodyOrientation>();
+
+			buildComplete = !self.Info.HasTraitInfo<BuildingInfo>(); // always render instantly for units
+			overlay = new Animation(self.World, rs.GetImage(self));
+			overlay.PlayThen(info.Sequence, () => visible = false);
+
+			var anim = new AnimationWithOffset(overlay,
+				() => body.LocalToWorld(info.Offset.Rotate(body.QuantizeOrientation(self, self.Orientation))),
+				() => IsTraitDisabled || !visible || !buildComplete,
+				p => RenderUtils.ZOffsetFromCenter(self, p, 1));
+
+			rs.Add(anim, info.Palette, info.IsPlayerPalette);
+		}
+
+		void INotifyBuildComplete.BuildingComplete(Actor self)
+		{
+			buildComplete = true;
+		}
+
+		void INotifySold.Sold(Actor self) { }
+		void INotifySold.Selling(Actor self)
+		{
+			buildComplete = false;
+		}
+
+		void INotifyNuke.Launching(Actor self)
+		{
+			visible = true;
+			overlay.PlayThen(overlay.CurrentSequence.Name, () => visible = false);
+		}
+	}
+}