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/Network/TickTime.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;
+
+namespace OpenRA.Network
+{
+	public sealed class TickTime
+	{
+		readonly Func<int> timestep;
+
+		public TickTime(Func<int> timestep, long lastTickTime)
+		{
+			this.timestep = timestep;
+			Value = lastTickTime;
+		}
+
+		public long Value { get; set; }
+
+		public bool ShouldAdvance(long tick)
+		{
+			var i = timestep();
+
+			if (i == 0)
+				return false;
+
+			var tickDelta = tick - Value;
+			return tickDelta >= i;
+		}
+
+		public void AdvanceTickTime(long tick)
+		{
+			var tickDelta = tick - Value;
+
+			var currentTimestep = timestep();
+
+			var integralTickTimestep = tickDelta / currentTimestep * currentTimestep;
+			Value += integralTickTimestep >= Game.TimestepJankThreshold
+				? integralTickTimestep
+				: currentTimestep;
+		}
+	}
+}