Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Graphics/AnimationWithOffset.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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 System;
+using OpenRA.Primitives;
+
+namespace OpenRA.Graphics
+{
+	public class AnimationWithOffset
+	{
+		public readonly Animation Animation;
+		public readonly Func<WVec> OffsetFunc;
+		public readonly Func<bool> DisableFunc;
+		public readonly Func<WPos, int> ZOffset;
+
+		public AnimationWithOffset(Animation a, Func<WVec> offset, Func<bool> disable)
+			: this(a, offset, disable, null) { }
+
+		public AnimationWithOffset(Animation a, Func<WVec> offset, Func<bool> disable, int zOffset)
+			: this(a, offset, disable, _ => zOffset) { }
+
+		public AnimationWithOffset(Animation a, Func<WVec> offset, Func<bool> disable, Func<WPos, int> zOffset)
+		{
+			Animation = a;
+			OffsetFunc = offset;
+			DisableFunc = disable;
+			ZOffset = zOffset;
+		}
+
+		public IRenderable[] Render(Actor self, PaletteReference pal)
+		{
+			var center = self.CenterPosition;
+			var offset = OffsetFunc?.Invoke() ?? WVec.Zero;
+
+			var z = ZOffset?.Invoke(center + offset) ?? 0;
+			return Animation.Render(center, offset, z, pal);
+		}
+
+		public Rectangle ScreenBounds(Actor self, WorldRenderer wr)
+		{
+			var center = self.CenterPosition;
+			var offset = OffsetFunc?.Invoke() ?? WVec.Zero;
+
+			return Animation.ScreenBounds(wr, center, offset);
+		}
+
+		public static implicit operator AnimationWithOffset(Animation a)
+		{
+			return new AnimationWithOffset(a, null, null, null);
+		}
+	}
+}