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/Map/CellLayerBase.cs

@@ -0,0 +1,68 @@
+#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 System.Collections;
+using System.Collections.Generic;
+using OpenRA.Primitives;
+
+namespace OpenRA
+{
+	public abstract class CellLayerBase<T> : IEnumerable<T>
+	{
+		public readonly Size Size;
+		public readonly MapGridType GridType;
+
+		protected readonly T[] Entries;
+		protected readonly Rectangle Bounds;
+
+		protected CellLayerBase(Map map)
+			: this(map.Grid.Type, map.MapSize) { }
+
+		protected CellLayerBase(MapGridType gridType, Size size)
+		{
+			Size = size;
+			Bounds = new Rectangle(0, 0, Size.Width, Size.Height);
+			GridType = gridType;
+			Entries = new T[size.Width * size.Height];
+		}
+
+		public virtual void CopyValuesFrom(CellLayerBase<T> anotherLayer)
+		{
+			if (Size != anotherLayer.Size || GridType != anotherLayer.GridType)
+				throw new ArgumentException("Layers must have a matching size and shape (grid type).", nameof(anotherLayer));
+
+			Array.Copy(anotherLayer.Entries, Entries, Entries.Length);
+		}
+
+		/// <summary>Clears the layer contents with their default value.</summary>
+		public virtual void Clear()
+		{
+			Array.Clear(Entries, 0, Entries.Length);
+		}
+
+		/// <summary>Clears the layer contents with a known value.</summary>
+		public virtual void Clear(T clearValue)
+		{
+			Array.Fill(Entries, clearValue);
+		}
+
+		public IEnumerator<T> GetEnumerator()
+		{
+			return ((IEnumerable<T>)Entries).GetEnumerator();
+		}
+
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return GetEnumerator();
+		}
+	}
+}