git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@2049 993157c7-ee19-0410-b2c4-bb4e9862e678

OpenRa.Game/Graphics/Sequence.cs

@@ -0,0 +1,38 @@
+using System.Xml;
+using Ijw.DirectX;
+
+namespace OpenRa.Game.Graphics
+{
+	class Sequence
+	{
+		readonly int start, length;
+
+		public int Start { get { return start; } }
+		public int End { get { return start + length; } }
+		public int Length { get { return length; } }
+
+		public Sequence(string unit, XmlElement e)
+		{
+			string srcOverride = e.GetAttribute("src");
+
+			Range<int> src = UnitSheetBuilder.GetUnit(
+				string.IsNullOrEmpty(srcOverride) ? unit : srcOverride);
+
+			start = src.Start + int.Parse(e.GetAttribute("start"));
+
+			if (e.GetAttribute("length") == "*" || e.GetAttribute("end") == "*")
+				length = src.End - start;
+			else if (e.HasAttribute("length"))
+				length = int.Parse(e.GetAttribute("length"));
+			else if (e.HasAttribute("end"))
+				length = int.Parse(e.GetAttribute("end")) - start;
+			else
+				length = 1;
+		}
+
+		public Sprite GetSprite(int frame)
+		{
+			return UnitSheetBuilder.sprites[frame + start];
+		}
+	}
+}