From 573f8035b3c083547638a749fa4501a289f3b3df Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Fri, 3 Dec 2004 23:43:35 +0000
Subject: [PATCH] eliminating brute-force search

---
 stepmania/src/ScreenGameplay.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/stepmania/src/ScreenGameplay.cpp b/stepmania/src/ScreenGameplay.cpp
index f3ac52890f..55dbb3ac0a 100644
--- a/stepmania/src/ScreenGameplay.cpp
+++ b/stepmania/src/ScreenGameplay.cpp
@@ -1569,11 +1569,12 @@ void ScreenGameplay::UpdateLights()
 			}
 		}
 
-		for( int r=iRowLastCrossed+1; r<=iRowNow; r++ )  // for each index we crossed since the last update
+		FOREACH_EnabledPlayer( pn )
 		{
-			FOREACH_EnabledPlayer( pn )
+			for( int t=0; t<m_Player[pn].m_NoteData.GetNumTracks(); t++ )
 			{
-				for( int t=0; t<m_Player[pn].m_NoteData.GetNumTracks(); t++ )
+				// for each index we crossed since the last update:
+				FOREACH_NONEMPTY_ROW_IN_TRACK_RANGE( m_Player[pn].m_NoteData, t, r, iRowLastCrossed+1, iRowNow )
 				{
 					TapNote tn = m_Player[pn].m_NoteData.GetTapNote(t,r);
 					bool bBlink = (tn.type != TapNote::empty && tn.type != TapNote::mine);