New options / metrics for StreamDisplay to help make three-part lifebars easier to implement.

stepmania/Themes/default/metrics.ini

@@ -4388,6 +4388,8 @@ end
 TextureCoordScaleX=10
 NumPills=20
 UseThreePartMethod=false
+ThreePartWidth=128
+AlwaysBounceNormalBar=false
 
 [StreamDisplayExtra]
 Fallback="StreamDisplay"

stepmania/src/StreamDisplay.cpp

@@ -20,6 +20,8 @@ StreamDisplay::StreamDisplay()
 	m_fVelocity = 0;
 	m_fPassingAlpha = 0;
 	m_fHotAlpha = 0;
+	m_fThreePartWidth = 0;
+	m_bAlwaysBounce = false;
 }
 
 void StreamDisplay::Load( const RString &_sMetricsGroup )
@@ -32,6 +34,11 @@ void StreamDisplay::Load( const RString &_sMetricsGroup )
 	float fTextureCoordScaleX = THEME->GetMetricF(sMetricsGroup,"TextureCoordScaleX");
 	int iNumPills = THEME->GetMetricF(sMetricsGroup,"NumPills");
 	m_bUsingThreePart = THEME->GetMetricB(sMetricsGroup,"UseThreePartMethod");
+	m_bAlwaysBounce = THEME->GetMetricB(sMetricsGroup,"AlwaysBounceNormalBar");
+
+	// three part method only uses 3 pills
+	if(iNumPills != 3)
+		m_bUsingThreePart = false;
 
 	FOREACH_ENUM( StreamType, st )
 	{
@@ -40,16 +47,30 @@ void StreamDisplay::Load( const RString &_sMetricsGroup )
 		for( int i=0; i<iNumPills; i++ )
 		{
 			Sprite *pSpr = new Sprite;
-			pSpr->Load( THEME->GetPathG(sMetricsGroup,StreamTypeToString(st)) );
+
+			if(m_bUsingThreePart)
+				pSpr->Load( THEME->GetPathG(sMetricsGroup,ssprintf("%s part%d",StreamTypeToString(st).c_str(),i) ) );
+			else
+				pSpr->Load( THEME->GetPathG(sMetricsGroup,StreamTypeToString(st)) );
 			m_vpSprPill[st].push_back( pSpr );
 
-			m_transformPill.TransformItemDirect( *pSpr, -1, i, iNumPills );
-
-			float f = 1 / fTextureCoordScaleX;
-			pSpr->SetCustomTextureRect( RectF(f*i,0,f*(i+1),1) );
+			if(!m_bUsingThreePart)
+			{
+				m_transformPill.TransformItemDirect( *pSpr, -1, i, iNumPills );
+				float f = 1 / fTextureCoordScaleX;
+				pSpr->SetCustomTextureRect( RectF(f*i,0,f*(i+1),1) );
+			}
 
 			this->AddChild( pSpr );
 		}
+
+		if(m_bUsingThreePart)
+		{
+			m_fThreePartWidth = THEME->GetMetricF(sMetricsGroup,"ThreePartWidth");
+			float fCroppedWidthRight = (1-m_vpSprPill[st][0]->GetCropRight())*m_vpSprPill[st][0]->GetZoomedWidth();
+			// first element positioned depending on metric width specified
+			m_vpSprPill[st][0]->AddX(-(m_fThreePartWidth/2 + m_vpSprPill[st][0]->GetZoomedWidth()/2) + fCroppedWidthRight);			
+		}
 	}
 }
 
@@ -57,6 +78,8 @@ void StreamDisplay::Update( float fDeltaSecs )
 {
 	ActorFrame::Update( fDeltaSecs );
 
+
+
 	// HACK:  Tweaking these values is very difficulty.  Update the
 	// "physics" many times so that the spring motion appears faster
 	for( int i=0; i<10; i++ )
@@ -78,6 +101,7 @@ void StreamDisplay::Update( float fDeltaSecs )
 			m_fVelocity += fSpringForce * fDeltaSecs;
 
 			const float fViscousForce = -m_fVelocity * 0.2f;
+			if(!m_bAlwaysBounce)
 			m_fVelocity += fViscousForce * fDeltaSecs;
 		}
 
@@ -100,22 +124,30 @@ void StreamDisplay::Update( float fDeltaSecs )
 			Sprite *pSpr = m_vpSprPill[st][i];
 			float fPercentFilledThisPill = SCALE( m_fTrailingPercent, fPillWidthPercent*i, fPillWidthPercent*(i+1), 0.0f, 1.0f );
 			CLAMP( fPercentFilledThisPill, 0.0f, 1.0f );
-			pSpr->SetCropRight( 1.0f - fPercentFilledThisPill );
+			
 			// XXX scale by current song speed
 		
 			if(!m_bUsingThreePart) // usual lifebar
 			{
+				pSpr->SetCropRight( 1.0f - fPercentFilledThisPill );
 				pSpr->SetTexCoordVelocity(-1,0);
 			}
 			else // using the three-part method
 			{
+				
+				if(i==1) // middle pill
+				{
+					float fMiddleWidth = m_fThreePartWidth * m_fTrailingPercent;
+					pSpr->ZoomToWidth(fMiddleWidth);
 
-				if(i==0)
-					pSpr->SetCustomTextureRect( RectF(0,0,0.33f,1) );
-				else if(fPercentFilledThisPill >= 100)
-					pSpr->SetCustomTextureRect( RectF(0.33f,0,0.66f,1) );
-				else
-					pSpr->SetCustomTextureRect( RectF(0.66f,0,1,1) );
+					float fMiddleX = m_vpSprPill[st][0]->GetX() + (fMiddleWidth/2) + (m_vpSprPill[st][0]->GetZoomedWidth()/2);
+					pSpr->SetX(fMiddleX);
+				}
+				else if(i!=0) // last pill
+				{
+					float fEndX = m_vpSprPill[st][1]->GetX() + (m_vpSprPill[st][1]->GetZoomedWidth()/2) + (pSpr->GetZoomedWidth()/2);
+					pSpr->SetX(fEndX);
+				}
 			}
 			// Optimization: Don't draw pills that are covered up
 			switch( st )

stepmania/src/StreamDisplay.h

@@ -43,6 +43,9 @@ private:
 	float m_fHotAlpha;
 	
 	bool m_bUsingThreePart;
+
+	float m_fThreePartWidth;
+	bool m_bAlwaysBounce;
 };
 
 #endif