[scroll] 90% of scroll segments

Themes/_fallback/metrics.ini

@@ -991,6 +991,7 @@ TickcountColor=color("0,1,0,1")
 ComboColor=color("0.55,1,0,1")
 LabelColor=color("1,0,0,1")
 SpeedColor=color("0.5,1,1,1")
+ScrollColor=color("0.3,0.8,1,1")
 FakeColor=color("1,1,0.5,1")
 #
 BPMIsLeftSide=true
@@ -1002,6 +1003,7 @@ TickcountIsLeftSide=false
 ComboIsLeftSide=false
 LabelIsLeftSide=false
 SpeedIsLeftSide=false
+ScrollIsLeftSide=true
 FakeIsLeftSide=true
 #
 BPMOffsetX=60
@@ -1013,6 +1015,7 @@ TickcountOffsetX=70
 ComboOffsetX=50
 LabelOffsetX=130
 SpeedOffsetX=30
+ScrollOffsetX=40
 FakeOffsetX=90
 
 [PlayerStageStats]

src/ArrowEffects.cpp

@@ -275,9 +275,12 @@ float ArrowEffects::GetYOffset( const PlayerState* pPlayerState, int iCol, float
 	 * entirely time spacing (respectively). Occasionally, we tween between them. */
 	if( pPlayerState->m_PlayerOptions.GetCurrent().m_fTimeSpacing != 1.0f )
 	{
+		float bShowEffects = !( GAMESTATE->m_bInStepEditor || !GAMESTATE->m_bIsUsingStepTiming );
 		float fBeatsUntilStep = fNoteBeat - fSongBeat;
+		if( bShowEffects )
+			fBeatsUntilStep = pCurSteps->m_Timing.GetDisplayedBeat(fNoteBeat) - pCurSteps->m_Timing.GetDisplayedBeat(fSongBeat);
 		float fYOffsetBeatSpacing = fBeatsUntilStep;
-		float fSpeedMultiplier = ( GAMESTATE->m_bInStepEditor || !GAMESTATE->m_bIsUsingStepTiming ) ? 1.0 : GetSpeedMultiplier( position.m_fSongBeatVisible, position.m_fMusicSecondsVisible, pCurSteps->m_Timing );
+		float fSpeedMultiplier = bShowEffects ? GetSpeedMultiplier( position.m_fSongBeatVisible, position.m_fMusicSecondsVisible, pCurSteps->m_Timing ) : 1.0;
 		fYOffset += fSpeedMultiplier * fYOffsetBeatSpacing * (1-pPlayerState->m_PlayerOptions.GetCurrent().m_fTimeSpacing);
 	}
 

src/NoteField.cpp

@@ -455,6 +455,7 @@ static ThemeMetric<RageColor> TICKCOUNT_COLOR ( "NoteField", "TickcountColor" );
 static ThemeMetric<RageColor> COMBO_COLOR ( "NoteField", "ComboColor" );
 static ThemeMetric<RageColor> LABEL_COLOR ( "NoteField", "LabelColor" );
 static ThemeMetric<RageColor> SPEED_COLOR ( "NoteField", "SpeedColor" );
+static ThemeMetric<RageColor> SCROLL_COLOR ( "NoteField", "ScrollColor" );
 static ThemeMetric<RageColor> FAKE_COLOR ("NoteField", "FakeColor" );
 static ThemeMetric<bool> BPM_IS_LEFT_SIDE ( "NoteField", "BPMIsLeftSide" );
 static ThemeMetric<bool> STOP_IS_LEFT_SIDE ( "NoteField", "StopIsLeftSide" );
@@ -465,6 +466,7 @@ static ThemeMetric<bool> TICKCOUNT_IS_LEFT_SIDE ( "NoteField", "TickcountIsLeftS
 static ThemeMetric<bool> COMBO_IS_LEFT_SIDE ( "NoteField", "ComboIsLeftSide" );
 static ThemeMetric<bool> LABEL_IS_LEFT_SIDE ( "NoteField", "LabelIsLeftSide" );
 static ThemeMetric<bool> SPEED_IS_LEFT_SIDE ( "NoteField", "SpeedIsLeftSide" );
+static ThemeMetric<bool> SCROLL_IS_LEFT_SIDE ( "NoteField", "ScrollIsLeftSide" );
 static ThemeMetric<bool> FAKE_IS_LEFT_SIDE ( "NoteField", "FakeIsLeftSide" );
 static ThemeMetric<float> BPM_OFFSETX ( "NoteField", "BPMOffsetX" );
 static ThemeMetric<float> STOP_OFFSETX ( "NoteField", "StopOffsetX" );
@@ -475,6 +477,7 @@ static ThemeMetric<float> TICKCOUNT_OFFSETX ( "NoteField", "TickcountOffsetX" );
 static ThemeMetric<float> COMBO_OFFSETX ( "NoteField", "ComboOffsetX" );
 static ThemeMetric<float> LABEL_OFFSETX ( "NoteField", "LabelOffsetX" );
 static ThemeMetric<float> SPEED_OFFSETX ( "NoteField", "SpeedOffsetX" );
+static ThemeMetric<float> SCROLL_OFFSETX ( "NoteField", "ScrollOffsetX" );
 static ThemeMetric<float> FAKE_OFFSETX ( "NoteField", "FakeOffsetX" );
 
 void NoteField::DrawBPMText( const float fBeat, const float fBPM )
@@ -622,6 +625,23 @@ void NoteField::DrawSpeedText( const float fBeat, float fPercent, float fWait, u
 	m_textMeasureNumber.Draw();
 }
 
+void NoteField::DrawScrollText( const float fBeat, float fPercent )
+{
+	const float fYOffset	= ArrowEffects::GetYOffset( m_pPlayerState, 0, fBeat );
+ 	const float fYPos	= ArrowEffects::GetYPos(    m_pPlayerState, 0, fYOffset, m_fYReverseOffsetPixels );
+	const float fZoom	= ArrowEffects::GetZoom(    m_pPlayerState );
+	const float xBase	= GetWidth()/2.f;
+	const float xOffset	= SCROLL_OFFSETX * fZoom;
+	
+	m_textMeasureNumber.SetZoom( fZoom );
+	m_textMeasureNumber.SetHorizAlign( SCROLL_IS_LEFT_SIDE ? align_right : align_left );
+	m_textMeasureNumber.SetDiffuse( SCROLL_COLOR );
+	m_textMeasureNumber.SetGlow( RageColor(1,1,1,RageFastCos(RageTimer::GetTimeSinceStartFast()*2)/2+0.5f) );
+	m_textMeasureNumber.SetText( ssprintf("%.3fx", fPercent) );
+	m_textMeasureNumber.SetXY( (SCROLL_IS_LEFT_SIDE ? -xBase - xOffset : xBase + xOffset), fYPos );
+	m_textMeasureNumber.Draw();
+}
+
 void NoteField::DrawFakeText( const float fBeat, const float fNewBeat )
 {
 	const float fYOffset	= ArrowEffects::GetYOffset( m_pPlayerState, 0, fBeat );
@@ -967,6 +987,20 @@ void NoteField::DrawPrimitives()
 			}
 		}
 		
+		// Scroll text
+		if( GAMESTATE->m_bIsUsingStepTiming )
+		{
+			FOREACH_CONST( ScrollSegment, timing.m_ScrollSegments, seg )
+			{
+				if( seg->m_iStartRow >= iFirstRowToDraw && seg->m_iStartRow <= iLastRowToDraw )
+				{
+					float fBeat = NoteRowToBeat(seg->m_iStartRow);
+					if( IS_ON_SCREEN(fBeat) )
+						DrawScrollText( fBeat, seg->m_fPercent );
+				}
+			}
+		}
+		
 		// Speed text
 		if( GAMESTATE->m_bIsUsingStepTiming )
 		{

src/NoteField.h

@@ -65,6 +65,7 @@ protected:
 	void DrawComboText( const float fBeat, int iCombo );
 	void DrawLabelText( const float fBeat, RString sLabel );
 	void DrawSpeedText( const float fBeat, float fPercent, float fWait, unsigned short usMode );
+	void DrawScrollText( const float fBeat, float fPercent );
 	void DrawFakeText( const float fBeat, const float fNewBeat );
 	void DrawAttackText( const float fBeat, const Attack &attack );
 	void DrawBGChangeText( const float fBeat, const RString sNewBGName );

src/NotesLoaderSSC.cpp

@@ -176,6 +176,36 @@ void SSCLoader::ProcessSpeeds( TimingData &out, const RString sParam )
 	}
 }
 
+void SSCLoader::ProcessScrolls( TimingData &out, const RString sParam )
+{
+	vector<RString> vs1;
+	split( sParam, ",", vs1 );
+	
+	FOREACH_CONST( RString, vs1, s1 )
+	{
+		vector<RString> vs2;
+		split( *s1, "=", vs2 );
+		
+		if( vs2.size() < 2 )
+		{
+			LOG->UserLog( "Song file", "(UNKNOWN)", "has an scroll change with %i values.", (int)vs2.size() );
+			continue;
+		}
+		
+		const float fBeat = StringToFloat( vs2[0] );
+		
+		ScrollSegment seg( fBeat, StringToFloat( vs2[1] ) );
+		
+		if( fBeat < 0 )
+		{
+			LOG->UserLog( "Song file", "(UNKNOWN)", "has an scroll change with beat %f.", fBeat );
+			continue;
+		}
+		
+		out.AddScrollSegment( seg );
+	}
+}
+
 void SSCLoader::ProcessFakes( TimingData &out, const RString sParam )
 {
 	vector<RString> arrayFakeExpressions;
@@ -601,6 +631,11 @@ bool SSCLoader::LoadFromSSCFile( const RString &sPath, Song &out, bool bFromCach
 					ProcessSpeeds( stepsTiming, sParams[1] );
 				}
 				
+				else if( sValueName=="SCROLLS" )
+				{
+					ProcessScrolls( stepsTiming, sParams[1] );
+				}
+				
 				else if( sValueName=="FAKES" )
 				{
 					ProcessFakes( stepsTiming, sParams[1] );

src/NotesLoaderSSC.h

@@ -81,6 +81,7 @@ namespace SSCLoader
 	void ProcessLabels( TimingData &, const RString );
 	void ProcessCombos( TimingData &, const RString );
 	void ProcessSpeeds( TimingData &, const RString );
+	void ProcessScrolls( TimingData &, const RString );
 	void ProcessFakes( TimingData &, const RString );
 }
 #endif

src/NotesWriterSSC.cpp

@@ -137,6 +137,11 @@ static void GetTimingTags( vector<RString> &lines, TimingData timing, bool bIsSo
 		w.Write( ss->m_iStartRow, ss->m_fPercent, ss->m_fWait, ss->m_usMode );
 	w.Finish();
 	
+	w.Init( "SCROLLS" );
+	FOREACH_CONST( ScrollSegment, timing.m_ScrollSegments, ss )
+		w.Write( ss->m_iStartRow, ss->m_fPercent );
+	w.Finish();
+	
 	if( !bIsSong )
 	{	
 		w.Init( "FAKES" );

src/ScreenEdit.cpp

@@ -85,6 +85,7 @@ AutoScreenMessage( SM_BackFromWarpChange );
 AutoScreenMessage( SM_BackFromSpeedPercentChange );
 AutoScreenMessage( SM_BackFromSpeedWaitChange );
 AutoScreenMessage( SM_BackFromSpeedModeChange );
+AutoScreenMessage( SM_BackFromScrollChange );
 AutoScreenMessage( SM_BackFromFakeChange );
 AutoScreenMessage( SM_DoEraseStepTiming );
 AutoScreenMessage( SM_DoSaveAndExit );
@@ -581,6 +582,7 @@ static MenuDef g_TimingDataInformation(
         MenuRowDef( ScreenEdit::speed_percent,			"Edit speed (percent)",		true, EditMode_Full, true, true, 0, NULL ),
         MenuRowDef( ScreenEdit::speed_wait,			"Edit speed (wait)",		true, EditMode_Full, true, true, 0, NULL ),
         MenuRowDef( ScreenEdit::speed_mode,			"Edit speed (mode)",		true, EditMode_Full, true, true, 0, "Beats", "Seconds" ),
+        MenuRowDef( ScreenEdit::scroll,			"Edit scrolling factor",		true, EditMode_Full, true, true, 0, NULL ),
         MenuRowDef( ScreenEdit::fake,				"Edit fake",			true, EditMode_Full, true, true, 0, NULL ),
         MenuRowDef( ScreenEdit::erase_step_timing,		"Erase step timing",		true, EditMode_Full, true, true, 0, NULL )
 );
@@ -2791,6 +2793,12 @@ void ScreenEdit::HandleScreenMessage( const ScreenMessage SM )
 		}
 		SetDirty( true );
 	}
+	else if( SM == SM_BackFromScrollChange )
+	{
+		float fNum = StringToFloat( ScreenTextEntry::s_sLastAnswer );
+		GetAppropriateTiming().SetScrollAtBeat( GetBeat(), fNum );
+		SetDirty( true );
+	}
 	else if ( SM == SM_BackFromFakeChange )
 	{
 		float fFake = StringToFloat( ScreenTextEntry::s_sLastAnswer );
@@ -3219,6 +3227,7 @@ void ScreenEdit::DisplayTimingMenu()
 	RString starting = ( pTime.GetSpeedModeAtBeat( fBeat ) == 1 ? "Seconds" : "Beats" );
 	g_TimingDataInformation.rows[speed_mode].SetOneUnthemedChoice( starting.c_str() );
 	
+	g_TimingDataInformation.rows[scroll].SetOneUnthemedChoice( ssprintf("%.5f", pTime.GetScrollAtBeat( fBeat ) ) );
 	g_TimingDataInformation.rows[fake].SetOneUnthemedChoice( ssprintf("%.5f", pTime.GetFakeAtBeat( fBeat ) ) );
 	
 	g_TimingDataInformation.rows[tickcount].bEnabled = GAMESTATE->m_bIsUsingStepTiming;
@@ -3907,6 +3916,7 @@ static LocalizedString ENTER_WARP_VALUE				( "ScreenEdit", "Enter a new Warp val
 static LocalizedString ENTER_SPEED_PERCENT_VALUE		( "ScreenEdit", "Enter a new Speed percent value." );
 static LocalizedString ENTER_SPEED_WAIT_VALUE			( "ScreenEdit", "Enter a new Speed wait value." );
 static LocalizedString ENTER_SPEED_MODE_VALUE			( "ScreenEdit", "Enter a new Speed mode value." );
+static LocalizedString ENTER_SCROLL_VALUE		( "ScreenEdit", "Enter a new Scroll value." );
 static LocalizedString ENTER_FAKE_VALUE				( "ScreenEdit", "Enter a new Fake value." );
 static LocalizedString CONFIRM_TIMING_ERASE			( "ScreenEdit", "Are you sure you want to erase this chart's timing data?" );
 void ScreenEdit::HandleTimingDataInformationChoice( TimingDataInformationChoice c, const vector<int> &iAnswers )
@@ -3991,6 +4001,14 @@ void ScreenEdit::HandleTimingDataInformationChoice( TimingDataInformationChoice
 		   10
 		   );
 		break;
+	case scroll:
+		ScreenTextEntry::TextEntry(
+		   SM_BackFromScrollChange,
+		   ENTER_SCROLL_VALUE,
+		   ssprintf( "%.5f", GetAppropriateTiming().GetScrollSegmentAtBeat( GetBeat() ).m_fPercent ),
+		   10
+		   );
+		break;
 	case speed_wait:
 		ScreenTextEntry::TextEntry(
 		   SM_BackFromSpeedWaitChange,

src/ScreenEdit.h

@@ -498,6 +498,7 @@ public:
 		speed_percent,
 		speed_wait,
 		speed_mode,
+		scroll,
 		fake,
 		erase_step_timing,
 		NUM_TIMING_DATA_INFORMATION_CHOICES

src/TimingData.cpp

@@ -73,6 +73,11 @@ void TimingData::AddSpeedSegment( const SpeedSegment &seg )
 	m_SpeedSegments.insert( upper_bound(m_SpeedSegments.begin(), m_SpeedSegments.end(), seg), seg );
 }
 
+void TimingData::AddScrollSegment( const ScrollSegment &seg )
+{
+	m_ScrollSegments.insert( upper_bound(m_ScrollSegments.begin(), m_ScrollSegments.end(), seg), seg );
+}
+
 void TimingData::AddFakeSegment( const FakeSegment &seg )
 {
 	m_FakeSegments.insert( upper_bound(m_FakeSegments.begin(), m_FakeSegments.end(), seg), seg );
@@ -290,6 +295,34 @@ void TimingData::SetSpeedAtRow( int iRow, float fPercent, float fWait, unsigned
 	}
 }
 
+void TimingData::SetScrollAtRow( int iRow, float fPercent )
+{
+	unsigned i;
+	for( i = 0; i < m_ScrollSegments.size(); i++ )
+	{
+		if( m_ScrollSegments[i].m_iStartRow >= iRow)
+			break;
+	}
+	
+	if ( i == m_ScrollSegments.size() || m_ScrollSegments[i].m_iStartRow != iRow )
+	{
+		// the core mod itself matters the most for comparisons.
+		if( i == 0 || m_ScrollSegments[i-1].m_fPercent != fPercent )
+			AddScrollSegment( ScrollSegment(iRow, fPercent) );
+	}
+	else
+	{
+		// The others aren't compared: only the mod itself matters.
+		if( i > 0  && m_ScrollSegments[i-1].m_fPercent == fPercent )
+			m_ScrollSegments.erase( m_ScrollSegments.begin()+i,
+					       m_ScrollSegments.begin()+i+1 );
+		else
+		{
+			m_ScrollSegments[i].m_fPercent = fPercent;
+		}
+	}
+}
+
 void TimingData::SetFakeAtRow( int iRow, float fNew )
 {
 	unsigned i;
@@ -400,6 +433,11 @@ unsigned short TimingData::GetSpeedModeAtRow( int iRow )
 	return GetSpeedSegmentAtRow( iRow ).m_usMode;
 }
 
+float TimingData::GetScrollAtRow( int iRow )
+{
+	return GetScrollSegmentAtRow( iRow ).m_fPercent;
+}
+
 float TimingData::GetFakeAtRow( int iFakeRow ) const
 {
 	for( unsigned i=0; i<m_FakeSegments.size(); i++ )
@@ -584,6 +622,15 @@ int TimingData::GetSpeedSegmentIndexAtRow( int iRow ) const
 	return static_cast<int>(i);
 }
 
+int TimingData::GetScrollSegmentIndexAtRow( int iRow ) const
+{
+	unsigned i;
+	for (i=0; i < m_ScrollSegments.size() - 1; i++ )
+		if( m_ScrollSegments[i+1].m_iStartRow > iRow )
+			break;
+	return static_cast<int>(i);
+}
+
 BPMSegment& TimingData::GetBPMSegmentAtRow( int iNoteRow )
 {
 	static BPMSegment empty;
@@ -612,6 +659,15 @@ SpeedSegment& TimingData::GetSpeedSegmentAtRow( int iRow )
 	return m_SpeedSegments[i];
 }
 
+ScrollSegment& TimingData::GetScrollSegmentAtRow( int iRow )
+{
+	unsigned i;
+	for( i=0; i<m_ScrollSegments.size()-1; i++ )
+		if( m_ScrollSegments[i+1].m_iStartRow > iRow )
+			break;
+	return m_ScrollSegments[i];
+}
+
 int TimingData::GetTimeSignatureNumeratorAtRow( int iRow )
 {
 	return GetTimeSignatureSegmentAtRow( iRow ).m_iNumerator;
@@ -942,6 +998,17 @@ float TimingData::GetElapsedTimeFromBeatNoOffset( float fBeat ) const
 	
 }
 
+float TimingData::GetDisplayedBeat( float fBeat ) const
+{
+	unsigned index = GetScrollSegmentIndexAtBeat(fBeat);
+	float fOutBeat = ( fBeat - NoteRowToBeat(m_ScrollSegments[index].m_iStartRow) ) * m_ScrollSegments[index].m_fPercent;
+	for( unsigned i = 0; i < index; i ++ )
+	{
+		fOutBeat += ( NoteRowToBeat(m_ScrollSegments[i + 1].m_iStartRow) - NoteRowToBeat(m_ScrollSegments[i].m_iStartRow) ) * m_ScrollSegments[i].m_fPercent;
+	}
+	return fOutBeat;
+}
+
 void TimingData::ScaleRegion( float fScale, int iStartIndex, int iEndIndex, bool bAdjustBPM )
 {
 	ASSERT( fScale > 0 );
@@ -1391,6 +1458,13 @@ void TimingData::TidyUpData()
 		SpeedSegment seg(0, 1, 0);
 		m_SpeedSegments.push_back( seg );
 	}
+	
+	// Always be sure there is a starting scrolling factor.
+	if( m_ScrollSegments.empty() )
+	{
+		ScrollSegment seg(0, 1);
+		m_ScrollSegments.push_back( seg );
+	}
 }
 
 
@@ -1422,6 +1496,11 @@ bool TimingData::HasSpeedChanges() const
 	return m_SpeedSegments.size()>1;
 }
 
+bool TimingData::HasScrollChanges() const
+{
+	return m_ScrollSegments.size()>1;
+}
+
 void TimingData::NoteRowToMeasureAndBeat( int iNoteRow, int &iMeasureIndexOut, int &iBeatIndexOut, int &iRowsRemainder ) const
 {
 	iMeasureIndexOut = 0;

src/TimingData.h

@@ -777,6 +777,82 @@ struct SpeedSegment
 	bool operator>=( const SpeedSegment &other ) const { return !operator<(other); }
 };
 
+/**
+ * @brief Identifies when the chart scroll changes.
+ *
+ * ScrollSegments adjusts the scrolling speed of the note field.
+ * Unlike forced attacks, these cannot be turned off at a set time:
+ * reset it by setting the precentage back to 1.
+ *
+ * These were inspired by the Pump It Up series. */
+struct ScrollSegment
+{
+	/** @brief Sets up the ScrollSegment with default values. */
+	ScrollSegment(): m_iStartRow(0), m_fPercent(1) {}
+	
+	/**
+	 * @brief Sets up the ScrollSegment with specified values.
+	 * @param i The row this activates.
+	 * @param p The percentage to use. */
+	ScrollSegment(int i, float p): m_iStartRow(i), m_fPercent(p) {}
+	
+	/**
+	 * @brief Sets up the ScrollSegment with specified values.
+	 * @param r The beat this activates.
+	 * @param p The percentage to use. */
+	ScrollSegment(float r, float p): m_iStartRow(BeatToNoteRow(r)), m_fPercent(p) {}
+	
+	/** @brief The row in which the ScrollSegment activates. */
+	int m_iStartRow;
+	/** @brief The percentage to use when multiplying the chart's scroll rate. */
+	float m_fPercent;
+	
+	/**
+	 * @brief Compares two ScrollSegment to see if they are equal to each other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the equality of the two segments.
+	 */
+	bool operator==( const ScrollSegment &other ) const
+	{
+		COMPARE( m_iStartRow );
+		COMPARE( m_fPercent );
+		return true;
+	}
+	/**
+	 * @brief Compares two ScrollSegment to see if they are not equal to each other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the inequality of the two segments.
+	 */
+	bool operator!=( const ScrollSegment &other ) const { return !operator==(other); }
+	/**
+	 * @brief Compares two ScrollSegment to see if one is less than the other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the truth/falsehood of if the first is less than the second.
+	 */
+	bool operator<( const ScrollSegment &other ) const { return m_iStartRow < other.m_iStartRow; }
+	/**
+	 * @brief Compares two ScrollSegment to see if one is less than or equal to the other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the truth/falsehood of if the first is less or equal to than the second.
+	 */
+	bool operator<=( const ScrollSegment &other ) const
+	{
+		return ( operator<(other) || operator==(other) );
+	}
+	/**
+	 * @brief Compares two ScrollSegment to see if one is greater than the other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the truth/falsehood of if the first is greater than the second.
+	 */
+	bool operator>( const ScrollSegment &other ) const { return !operator<=(other); }
+	/**
+	 * @brief Compares two ScrollSegment to see if one is greater than or equal to the other.
+	 * @param other the other ScrollSegment to compare to.
+	 * @return the truth/falsehood of if the first is greater than or equal to the second.
+	 */
+	bool operator>=( const ScrollSegment &other ) const { return !operator<(other); }
+};
+
 /**
  * @brief Identifies when a whole region of arrows is to be ignored.
  *
@@ -1594,6 +1670,65 @@ public:
 	 */
 	void AddSpeedSegment( const SpeedSegment &seg );
 	
+	/**
+	 * @brief Retrieve the scrolling factor at the given row.
+	 * @param iNoteRow the row in question.
+	 * @return the percent.
+	 */
+	float GetScrollAtRow( int iNoteRow );
+	/**
+	 * @brief Retrieve the scrolling factor at the given beat.
+	 * @param fBeat the beat in question.
+	 * @return the percent.
+	 */
+	float GetScrollAtBeat( float fBeat ) { return GetScrollAtRow( BeatToNoteRow(fBeat) ); }
+
+	/**
+	 * @brief Set the row to have the new Scrolling factor.
+	 * @param iNoteRow the row to have the new Speed.
+	 * @param fPercent the scrolling factor.
+	 */
+	void SetScrollAtRow( int iNoteRow, float fPercent );
+	/**
+	 * @brief Set the row to have the new Scrolling factor.
+	 * @param iNoteRow the row to have the new Speed.
+	 * @param fPercent the scrolling factor.
+	 */
+	void SetScrollAtBeat( float fBeat, float fPercent ) { SetScrollAtRow( BeatToNoteRow(fBeat), fPercent ); }
+	
+	/**
+	 * @brief Retrieve the ScrollSegment at the specified row.
+	 * @param iNoteRow the row that has a ScrollSegment.
+	 * @return the ScrollSegment in question.
+	 */
+	ScrollSegment& GetScrollSegmentAtRow( int iNoteRow );
+	/**
+	 * @brief Retrieve the ScrollSegment at the specified beat.
+	 * @param fBeat the beat that has a ScrollSegment.
+	 * @return the ScrollSegment in question.
+	 */
+	ScrollSegment& GetScrollSegmentAtBeat( float fBeat ) { return GetScrollSegmentAtRow( BeatToNoteRow(fBeat) ); }
+	
+	/**
+	 * @brief Retrieve the index of the ScrollSegment at the specified row.
+	 * @param iNoteRow the row that has a ScrollSegment.
+	 * @return the ScrollSegment's index in question.
+	 */
+	int GetScrollSegmentIndexAtRow( int iNoteRow ) const;
+	/**
+	 * @brief Retrieve the index of the ScrollSegment at the specified beat.
+	 * @param fBeat the beat that has a ScrollSegment.
+	 * @return the ScrollSegment's index in question.
+	 */
+	int GetScrollSegmentIndexAtBeat( float fBeat ) const { return GetScrollSegmentIndexAtRow( BeatToNoteRow(fBeat) ); }
+	
+	/**
+	 * @brief Add the ScrollSegment to the TimingData.
+	 * @param seg the new ScrollSegment.
+	 */
+	void AddScrollSegment( const ScrollSegment &seg );
+	
+	
 	/**
 	 * @brief Determine when the fakes end.
 	 * @param iRow The row you start on.
@@ -1687,6 +1822,7 @@ public:
 		return fBeat;
 	}
 	float GetElapsedTimeFromBeatNoOffset( float fBeat ) const;
+	float GetDisplayedBeat( float fBeat ) const;
 	/**
 	 * @brief View the TimingData to see if a song changes its BPM at any point.
 	 * @return true if there is at least one change, false otherwise.
@@ -1712,6 +1848,10 @@ public:
 	 * @brief View the TimingData to see if a song changes its speed scrolling at any point.
 	 * @return true if there is at least one change, false otherwise. */
 	bool HasSpeedChanges() const;
+	/**
+	 * @brief View the TimingData to see if a song changes its speed scrolling at any point.
+	 * @return true if there is at least one change, false otherwise. */
+	bool HasScrollChanges() const;
 	/**
 	 * @brief Compare two sets of timing data to see if they are equal.
 	 * @param other the other TimingData.
@@ -1743,6 +1883,9 @@ public:
 		COMPARE( m_SpeedSegments.size() );
 		for( unsigned i=0; i<m_SpeedSegments.size(); i++ )
 			COMPARE( m_SpeedSegments[i] );
+		COMPARE( m_ScrollSegments.size() );
+		for( unsigned i=0; i<m_ScrollSegments.size(); i++ )
+			COMPARE( m_ScrollSegments[i] );
 		COMPARE( m_FakeSegments.size() );
 		for( unsigned i=0; i<m_FakeSegments.size(); i++ )
 			COMPARE( m_FakeSegments[i] );
@@ -1804,6 +1947,8 @@ public:
 	vector<LabelSegment>		m_LabelSegments;
 	/** @brief The collection of SpeedSegments. */
 	vector<SpeedSegment>		m_SpeedSegments;
+	/** @brief The collection of ScrollSegments. */
+	vector<ScrollSegment>		m_ScrollSegments;
 	/** @brief The collection of FakeSegments. */
 	vector<FakeSegment>		m_FakeSegments;
 	/**