Ore pips on refinery and silo

OpenRa.Game/Traits/StoresOre.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+
+namespace OpenRa.Game.Traits
+{
+	class StoresOre : IPips
+	{
+		readonly Actor self;
+		
+		public StoresOre(Actor self)
+		{
+			this.self = self;
+		}
+		
+		public IEnumerable<PipType> GetPips()
+		{
+			if (self.Info.OrePips == 0) yield break;
+
+			for (int i = 0; i < self.Info.OrePips; i++)
+			{
+				if (Game.LocalPlayer.GetSiloFullness() > i * 1.0f / self.Info.OrePips)
+				{
+					yield return PipType.Yellow;
+					continue;
+				}
+				yield return PipType.Transparent;
+			}
+		}
+	}
+}