Everything is now OpenRA, not OpenRa

OpenRA.Game/Graphics/Sequence.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.Xml;
+
+namespace OpenRA.Graphics
+{
+	public class Sequence
+	{
+		readonly Sprite[] sprites;
+		readonly int start, length, facings;
+
+		public readonly string Name;
+		public int Start { get { return start; } }
+		public int End { get { return start + length; } }
+		public int Length { get { return length; } }
+		public int Facings { get { return facings; } }
+
+		public Sequence(string unit, XmlElement e)
+		{
+			string srcOverride = e.GetAttribute("src");
+			Name = e.GetAttribute("name");
+
+			sprites = SpriteSheetBuilder.LoadAllSprites(string.IsNullOrEmpty(srcOverride) ? unit : srcOverride );
+			start = int.Parse(e.GetAttribute("start"));
+
+			if (e.GetAttribute("length") == "*" || e.GetAttribute("end") == "*")
+				length = sprites.Length - Start;
+			else if (e.HasAttribute("length"))
+				length = int.Parse(e.GetAttribute("length"));
+			else if (e.HasAttribute("end"))
+				length = int.Parse(e.GetAttribute("end")) - int.Parse(e.GetAttribute("start"));
+			else
+				length = 1;
+
+			if( e.HasAttribute( "facings" ) )
+				facings = int.Parse( e.GetAttribute( "facings" ) );
+			else
+				facings = 1;
+		}
+
+		public Sprite GetSprite( int frame )
+		{
+			return GetSprite( frame, 0 );
+		}
+
+		public Sprite GetSprite(int frame, int facing)
+		{
+			var f = Traits.Util.QuantizeFacing( facing, facings );
+			return sprites[ (f * length) + ( frame % length ) + start ];
+		}
+	}
+}