make NumItemsToDraw a float

stepmania/src/ActorScroller.cpp

@@ -12,7 +12,7 @@ ActorScroller::ActorScroller()
 	m_fCurrentItem = 0;
 	m_fDestinationItem = 0;
 	m_fSecondsPerItem = 1;
-	m_iNumItemsToDraw = 7;
+	m_fNumItemsToDraw = 7;
 
 	m_vRotationDegrees = RageVector3(0,0,0);
 	m_vTranslateTerm0 = RageVector3(0,0,0);
@@ -22,7 +22,7 @@ ActorScroller::ActorScroller()
 
 void ActorScroller::Load( 
 	float fSecondsPerItem, 
-	int iNumItemsToDraw, 
+	float fNumItemsToDraw, 
 	const RageVector3	&vRotationDegrees,
 	const RageVector3	&vTranslateTerm0,
 	const RageVector3	&vTranslateTerm1,
@@ -30,7 +30,7 @@ void ActorScroller::Load(
 	)
 {
 	m_fSecondsPerItem = fSecondsPerItem;
-	m_iNumItemsToDraw = iNumItemsToDraw;
+	m_fNumItemsToDraw = fNumItemsToDraw;
 	m_vRotationDegrees = vRotationDegrees;
 	m_vTranslateTerm0 = vTranslateTerm0;
 	m_vTranslateTerm1 = vTranslateTerm1;
@@ -103,14 +103,14 @@ void ActorScroller::DrawPrimitives()
 	}
 	else
 	{
-		int iFirstItemToDraw = (int)roundf( m_fCurrentItem - m_iNumItemsToDraw/2.f );
-		for( int i=iFirstItemToDraw; i<iFirstItemToDraw+m_iNumItemsToDraw; i++ )
+		int iFirstItemToDraw = (int)roundf( m_fCurrentItem - m_fNumItemsToDraw/2.f );
+		for( int i=0; i<m_SubActors.size(); i++ )
 		{
-			if( i < 0  ||  i >= (int)m_SubActors.size() )
-				continue;	// skip
-
 			float fItemOffset = i - m_fCurrentItem;
 
+			if( fabsf(fItemOffset) > m_fNumItemsToDraw / 2 )
+				continue;
+
 			DISPLAY->PushMatrix();
 
 			if( m_vRotationDegrees[0] )

stepmania/src/ActorScroller.h

@@ -14,7 +14,7 @@ public:
 
 	void Load( 
 		float fScrollSecondsPerItem, 
-		int iNumItemsToDraw, 
+		float fNumItemsToDraw, 
 		const RageVector3	&vRotationDegrees,
 		const RageVector3	&vTranslateTerm0,
 		const RageVector3	&vTranslateTerm1,
@@ -32,7 +32,7 @@ protected:
 	float		m_fCurrentItem; // usually between 0 and m_SubActors.size()
 	float		m_fDestinationItem;
 	float		m_fSecondsPerItem;		// <= 0 means don't scroll
-	int			m_iNumItemsToDraw;
+	float		m_fNumItemsToDraw;
 	
 	// Note: Rotation is applied before translation.
 

stepmania/src/ScreenNameEntryTraditional.cpp

@@ -107,7 +107,7 @@ void HighScoreWheel::Load( const HighScoreList& hsl, int iIndexToFocus )
 
 	ActorScroller::Load( 
 		0.2f,	// fSecondsPerItem
-		8,		// iNumItemsToDraw
+		8,		// fNumItemsToDraw
 		RageVector3(18,0,0),	// vRotationDegrees
 		RageVector3(0,0,90),	// vTranslateTerm0
 		RageVector3(0,0,0),		// vTranslateTerm1