Everything is now OpenRA, not OpenRa

OpenRA.Game/GameRules/Footprint.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using OpenRA.Traits;
+
+namespace OpenRA.GameRules
+{
+	static class Footprint
+	{
+		public static IEnumerable<int2> Tiles( string name, BuildingInfo buildingInfo, int2 topLeft )
+		{
+			var dim = buildingInfo.Dimensions;
+
+			var footprint = buildingInfo.Footprint.Where(x => !char.IsWhiteSpace(x));
+			if (buildingInfo.Bib)
+			{
+				dim.Y += 1;
+				footprint = footprint.Concat(new char[dim.X]);
+			}
+
+			return TilesWhere( name, dim, footprint.ToArray(), a => a != '_' ).Select( t => t + topLeft );
+		}
+
+		public static IEnumerable<int2> Tiles(Actor a, Traits.Building building)
+		{
+			return Tiles( a.Info.Name, a.Info.Traits.Get<BuildingInfo>(), a.Location );
+		}
+
+		public static IEnumerable<int2> UnpathableTiles( string name, BuildingInfo buildingInfo, int2 position )
+		{
+			var footprint = buildingInfo.Footprint.Where( x => !char.IsWhiteSpace( x ) ).ToArray();
+			foreach( var tile in TilesWhere( name, buildingInfo.Dimensions, footprint, a => a == 'x' ) )
+				yield return tile + position;
+		}
+
+		static IEnumerable<int2> TilesWhere( string name, int2 dim, char[] footprint, Func<char, bool> cond )
+		{
+			if( footprint.Length != dim.X * dim.Y )
+				throw new InvalidOperationException( "Invalid footprint for " + name );
+			int index = 0;
+
+			for( int y = 0 ; y < dim.Y ; y++ )
+				for( int x = 0 ; x < dim.X ; x++ )
+					if( cond( footprint[ index++ ] ) )
+						yield return new int2( x, y );
+		}
+
+		public static int2 AdjustForBuildingSize( BuildingInfo buildingInfo )
+		{
+			var dim = buildingInfo.Dimensions;
+			return new int2( dim.X / 2, dim.Y > 1 ? ( dim.Y + 1 ) / 2 : 0 );
+		}
+	}
+}