water palette done that way

OpenRa.Game/Traits/WaterPaletteRotation.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+
+namespace OpenRa.Game.Traits
+{
+	class WaterPaletteRotation : ITick, IPaletteModifier
+	{
+		public WaterPaletteRotation(Actor self) { }
+
+		float t = 0;
+		public void Tick(Actor self)
+		{
+			t += .25f;
+		}
+
+		public void AdjustPalette(Bitmap b)
+		{
+			var rotate = (int)t % 7;
+			using (var bitmapCopy = new Bitmap(b))
+				for (int j = 0; j < 16; j++)
+					for (int i = 0; i < 7; i++)
+						b.SetPixel(0x60 + (rotate + i) % 7, j, bitmapCopy.GetPixel(0x60 + i, j));
+		}
+	}
+}