Move ClassicFacingFudge support to Mods.Cnc

This moves the TD/RA-specific re-mapping of sprite facings
and coordinates to Mods.Cnc.

OpenRA.Mods.Cnc/Traits/ClassicFacingBodyOrientation.cs

@@ -0,0 +1,32 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2020 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.Mods.Common.Traits;
+
+namespace OpenRA.Mods.Cnc.Traits
+{
+	[Desc("Fudge the coordinate system angles like the early games (for sprite sequences that use classic facing fudge).")]
+	public class ClassicFacingBodyOrientationInfo : BodyOrientationInfo
+	{
+		public override int QuantizeFacing(int facing, int facings)
+		{
+			return OpenRA.Mods.Cnc.Util.ClassicQuantizeFacing(facing, facings, true) * (256 / facings);
+		}
+
+		public override object Create(ActorInitializer init) { return new ClassicFacingBodyOrientation(init, this); }
+	}
+
+	public class ClassicFacingBodyOrientation : BodyOrientation
+	{
+		public ClassicFacingBodyOrientation(ActorInitializer init, ClassicFacingBodyOrientationInfo info)
+			: base(init, info) { }
+	}
+}