BIM/UIM become traits on World; Added World.WorldActor

OpenRa.Game/Traits/BuildingInfluence.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.GameRules;
+
+namespace OpenRa.Traits
+{
+	public class BuildingInfluenceInfo : ITraitInfo
+	{
+		public object Create( Actor self ) { return new BuildingInfluence( self ); }
+	}
+
+	public class BuildingInfluence
+	{
+		bool[,] blocked = new bool[128, 128];
+		Actor[,] influence = new Actor[128, 128];
+
+		public BuildingInfluence( Actor self )
+		{
+			self.World.ActorAdded +=
+				a => { if (a.traits.Contains<Building>()) 
+					ChangeInfluence(a, a.traits.Get<Building>(), true); };
+			self.World.ActorRemoved +=
+				a => { if (a.traits.Contains<Building>()) 
+					ChangeInfluence(a, a.traits.Get<Building>(), false); };
+		}
+
+		void ChangeInfluence( Actor a, Building building, bool isAdd )
+		{
+			foreach( var u in Footprint.UnpathableTiles( a.Info.Name, a.Info.Traits.Get<BuildingInfo>(), a.Location ) )
+				if( IsValid( u ) )
+					blocked[ u.X, u.Y ] = isAdd;
+
+			foreach( var u in Footprint.Tiles( a.Info.Name, a.Info.Traits.Get<BuildingInfo>(), a.Location ) )
+				if( IsValid( u ) )
+					influence[ u.X, u.Y ] = isAdd ? a : null;
+		}
+
+		bool IsValid(int2 t)
+		{
+			return !(t.X < 0 || t.Y < 0 || t.X >= 128 || t.Y >= 128);
+		}
+
+		public Actor GetBuildingAt(int2 cell)
+		{
+			if (!IsValid(cell)) return null;
+			return influence[cell.X, cell.Y];
+		}
+
+		public bool CanMoveHere(int2 cell)
+		{
+			return IsValid(cell) && !blocked[cell.X, cell.Y];
+		}
+	}}