Convert IonCannon to world coords.

OpenRA.Mods.Cnc/Effects/IonCannon.cs

@@ -34,12 +34,10 @@ namespace OpenRA.Mods.Cnc.Effects
 
 		public IEnumerable<IRenderable> Render(WorldRenderer wr)
 		{
-			yield return new SpriteRenderable(anim.Image,
-				target.CenterLocation.ToFloat2() - new float2(0, 0.5f*anim.Image.size.Y - Game.CellSize),
-				wr.Palette("effect"), (int)target.CenterLocation.Y);
+			yield return new SpriteRenderable(anim.Image, target.CenterPosition, 1, wr.Palette("effect"), 1.0f);
 		}
 
-		void Finish( World world )
+		void Finish(World world)
 		{
 			world.AddFrameEndTask(w => w.Remove(this));
 			Combat.DoExplosion(firedBy, "IonCannon", target.CenterLocation, 0);

mods/cnc/sequences/misc.yaml

@@ -223,6 +223,7 @@ ionsfx:
 	idle:
 		Start: 0
 		Length: *
+		Offset: 0, -78
 
 bomblet:
 	idle: