Rename BridgeLayer to LegacyBridgeLayer.

OpenRA.Mods.Common/Traits/World/LegacyBridgeLayer.cs

@@ -0,0 +1,111 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 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 System.Collections.Generic;
+using System.Linq;
+using OpenRA.Graphics;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	class LegacyBridgeLayerInfo : ITraitInfo
+	{
+		[ActorReference]
+		public readonly string[] Bridges = { "bridge1", "bridge2" };
+
+		public object Create(ActorInitializer init) { return new LegacyBridgeLayer(init.Self, this); }
+	}
+
+	class LegacyBridgeLayer : IWorldLoaded
+	{
+		readonly LegacyBridgeLayerInfo info;
+		readonly Dictionary<ushort, Pair<string, int>> bridgeTypes = new Dictionary<ushort, Pair<string, int>>();
+
+		CellLayer<Bridge> bridges;
+
+		public LegacyBridgeLayer(Actor self, LegacyBridgeLayerInfo info)
+		{
+			this.info = info;
+		}
+
+		public void WorldLoaded(World w, WorldRenderer wr)
+		{
+			bridges = new CellLayer<Bridge>(w.Map);
+
+			// Build a list of templates that should be overlayed with bridges
+			foreach (var bridge in info.Bridges)
+			{
+				var bi = w.Map.Rules.Actors[bridge].TraitInfo<BridgeInfo>();
+				foreach (var template in bi.Templates)
+					bridgeTypes.Add(template.First, Pair.New(bridge, template.Second));
+			}
+
+			// Take all templates to overlay from the map
+			foreach (var cell in w.Map.AllCells.Where(cell => bridgeTypes.ContainsKey(w.Map.Tiles[cell].Type)))
+				ConvertBridgeToActor(w, cell);
+
+			// Link adjacent (long)-bridges so that artwork is updated correctly
+			foreach (var p in w.ActorsWithTrait<Bridge>())
+				p.Trait.LinkNeighbouringBridges(w, this);
+		}
+
+		void ConvertBridgeToActor(World w, CPos cell)
+		{
+			// This cell already has a bridge overlaying it from a previous iteration
+			if (bridges[cell] != null)
+				return;
+
+			// Correlate the tile "image" aka subtile with its position to find the template origin
+			var tile = w.Map.Tiles[cell].Type;
+			var index = w.Map.Tiles[cell].Index;
+			var template = w.Map.Rules.TileSet.Templates[tile];
+			var ni = cell.X - index % template.Size.X;
+			var nj = cell.Y - index / template.Size.X;
+
+			// Create a new actor for this bridge and keep track of which subtiles this bridge includes
+			var bridge = w.CreateActor(bridgeTypes[tile].First, new TypeDictionary
+			{
+				new LocationInit(new CPos(ni, nj)),
+				new OwnerInit(w.WorldActor.Owner),
+				new HealthInit(bridgeTypes[tile].Second, true),
+			}).Trait<Bridge>();
+
+			var subTiles = new Dictionary<CPos, byte>();
+			var mapTiles = w.Map.Tiles;
+
+			// For each subtile in the template
+			for (byte ind = 0; ind < template.Size.X * template.Size.Y; ind++)
+			{
+				// Where do we expect to find the subtile
+				var subtile = new CPos(ni + ind % template.Size.X, nj + ind / template.Size.X);
+
+				// This isn't the bridge you're looking for
+				if (!mapTiles.Contains(subtile) || mapTiles[subtile].Type != tile || mapTiles[subtile].Index != ind)
+					continue;
+
+				subTiles.Add(subtile, ind);
+				bridges[subtile] = bridge;
+			}
+
+			bridge.Create(tile, subTiles);
+		}
+
+		// Used to check for neighbouring bridges
+		public Bridge GetBridge(CPos cell)
+		{
+			if (!bridges.Contains(cell))
+				return null;
+
+			return bridges[cell];
+		}
+	}
+}