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/ModelAnimation.cs

@@ -0,0 +1,51 @@
+#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 readonly struct ModelAnimation
+	{
+		public readonly IModel Model;
+		public readonly Func<WVec> OffsetFunc;
+		public readonly Func<WRot> RotationFunc;
+		public readonly Func<bool> DisableFunc;
+		public readonly Func<uint> FrameFunc;
+		public readonly bool ShowShadow;
+
+		public ModelAnimation(IModel model, Func<WVec> offset, Func<WRot> rotation, Func<bool> disable, Func<uint> frame, bool showshadow)
+		{
+			Model = model;
+			OffsetFunc = offset;
+			RotationFunc = rotation;
+			DisableFunc = disable;
+			FrameFunc = frame;
+			ShowShadow = showshadow;
+		}
+
+		public Rectangle ScreenBounds(WPos pos, WorldRenderer wr, float scale)
+		{
+			var r = Model.AggregateBounds;
+			var offset = OffsetFunc != null ? OffsetFunc() : WVec.Zero;
+			var xy = wr.ScreenPxPosition(pos) + wr.ScreenPxOffset(offset);
+
+			return Rectangle.FromLTRB(
+				xy.X + (int)(r.Left * scale),
+				xy.Y + (int)(r.Top * scale),
+				xy.X + (int)(r.Right * scale),
+				xy.Y + (int)(r.Bottom * scale));
+		}
+
+		public bool IsVisible => DisableFunc == null || !DisableFunc();
+	}
+}