Add AttackCharges trait for TD and TS obelisks.

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

@@ -0,0 +1,72 @@
+#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.Graphics;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits.Render
+{
+	[Desc("Render overlay that varies the animation frame based on the AttackCharges trait's charge level.")]
+	class WithChargeOverlayInfo : ITraitInfo, Requires<WithSpriteBodyInfo>, Requires<RenderSpritesInfo>
+	{
+		[SequenceReference]
+		[Desc("Sequence to use for the charge levels.")]
+		public readonly string Sequence = "active";
+
+		[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 WithChargeOverlay(init.Self, this); }
+	}
+
+	class WithChargeOverlay : INotifyBuildComplete, INotifySold, INotifyDamageStateChanged
+	{
+		readonly WithChargeOverlayInfo info;
+		readonly Animation overlay;
+		readonly RenderSprites rs;
+		readonly WithSpriteBody wsb;
+
+		bool buildComplete;
+
+		public WithChargeOverlay(Actor self, WithChargeOverlayInfo info)
+		{
+			this.info = info;
+			rs = self.Trait<RenderSprites>();
+			wsb = self.Trait<WithSpriteBody>();
+
+			var attackCharges = self.Trait<AttackCharges>();
+			var attackChargesInfo = (AttackChargesInfo)attackCharges.Info;
+
+			overlay = new Animation(self.World, rs.GetImage(self));
+			overlay.PlayFetchIndex(wsb.NormalizeSequence(self, info.Sequence),
+				() => int2.Lerp(0, overlay.CurrentSequence.Length, attackCharges.ChargeLevel, attackChargesInfo.ChargeLevel + 1));
+
+			rs.Add(new AnimationWithOffset(overlay, null, () => !buildComplete, 1024),
+				info.Palette, info.IsPlayerPalette);
+		}
+
+		void INotifyBuildComplete.BuildingComplete(Actor self)
+		{
+			buildComplete = true;
+		}
+
+		void INotifyDamageStateChanged.DamageStateChanged(Actor self, AttackInfo e)
+		{
+			overlay.ReplaceAnim(RenderSprites.NormalizeSequence(overlay, e.DamageState, info.Sequence));
+		}
+
+		void INotifySold.Selling(Actor self) { buildComplete = false; }
+		void INotifySold.Sold(Actor self) { }
+	}
+}