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/MapPlayers.cs

@@ -0,0 +1,82 @@
+#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.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA
+{
+	public class MapPlayers
+	{
+		// Player masks are represented using a 64 bit integer
+		// The "Everyone" player for spectators is created at runtime,
+		// reducing the available player count for maps by 1.
+		public const int MaximumPlayerCount = 63;
+		public readonly Dictionary<string, PlayerReference> Players;
+
+		public MapPlayers()
+			: this([]) { }
+
+		public MapPlayers(IEnumerable<MiniYamlNode> playerDefinitions)
+		{
+			Players = playerDefinitions.Select(pr => new PlayerReference(new MiniYaml(pr.Key, pr.Value.Nodes)))
+				.ToDictionary(player => player.Name);
+		}
+
+		public MapPlayers(Ruleset rules, int playerCount)
+		{
+			var firstFaction = rules.Actors[SystemActors.World].TraitInfos<FactionInfo>()
+				.First(f => f.Selectable).InternalName;
+
+			Players = new Dictionary<string, PlayerReference>
+			{
+				{
+					"Neutral", new PlayerReference
+					{
+						Name = "Neutral",
+						Faction = firstFaction,
+						OwnsWorld = true,
+						NonCombatant = true
+					}
+				},
+				{
+					"Creeps", new PlayerReference
+					{
+						Name = "Creeps",
+						Faction = firstFaction,
+						NonCombatant = true,
+						Enemies = Exts.MakeArray(playerCount, i => $"Multi{i}").ToImmutableArray()
+					}
+				}
+			};
+
+			for (var index = 0; index < playerCount; index++)
+			{
+				var p = new PlayerReference
+				{
+					Name = $"Multi{index}",
+					Faction = "Random",
+					Playable = true,
+					Enemies = ["Creeps"]
+				};
+				Players.Add(p.Name, p);
+			}
+		}
+
+		public List<MiniYamlNode> ToMiniYaml()
+		{
+			return Players.Select(p => new MiniYamlNode($"PlayerReference@{p.Key}",
+				FieldSaver.SaveDifferences(p.Value, new PlayerReference()))).ToList();
+		}
+	}
+}