From 2c388308c79578f5e8ba81039607962b902d802e Mon Sep 17 00:00:00 2001
From: Paolo Chiodi <chiodi84@gmail.com>
Date: Sat, 4 Sep 2010 10:35:33 +0200
Subject: [PATCH] avoid calling Viewport.Scroll on every ScreenShaker.Tick

---
 OpenRA.Game/Traits/World/ScreenShaker.cs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/OpenRA.Game/Traits/World/ScreenShaker.cs b/OpenRA.Game/Traits/World/ScreenShaker.cs
index c8268ff202..d9f200ed99 100644
--- a/OpenRA.Game/Traits/World/ScreenShaker.cs
+++ b/OpenRA.Game/Traits/World/ScreenShaker.cs
@@ -22,9 +22,11 @@ namespace OpenRA.Traits
         List<ShakeEffect> shakeEffects = new List<ShakeEffect>();
 		
 		public void Tick (Actor self)
-		{
-			Game.viewport.Scroll(GetScrollOffset(), true);
-			shakeEffects.RemoveAll(t => t.ExpiryTime == ticks);
+		{
+			if(shakeEffects.Any()){
+				Game.viewport.Scroll(GetScrollOffset(), true);
+				shakeEffects.RemoveAll(t => t.ExpiryTime == ticks);
+			}
 			ticks++;
 		}