added ActorMultiVertex

AMV is an actor which can have a variable number of vertices that can
each be given their own pos, color, and coords. They can be drawn using
any of the RageSpriteVertex draw functions in RageDisplay.cpp. The
vertex properties can be tweened.

src/Actor.cpp

@@ -84,7 +84,7 @@ void Actor::SetBGMLight( int iLightNumber, float fCabinetLights )
 
 void Actor::InitState()
 {
-	StopTweening();
+	this->StopTweening();
 
 	m_pTempState = NULL;
 
@@ -615,14 +615,9 @@ void Actor::EndDraw()
 
 void Actor::UpdateTweening( float fDeltaTime )
 {
-	while( 1 )
+	while( !m_Tweens.empty() // something to do
+		&& fDeltaTime > 0 )	// something will change
 	{
-		if( m_Tweens.empty() ) // nothing to do
-			return;
-
-		if( fDeltaTime == 0 )	// nothing will change
-			return;
-
 		// update current tween state
 		// earliest tween
 		TweenState &TS = m_Tweens[0]->state;
@@ -636,7 +631,10 @@ void Actor::UpdateTweening( float fDeltaTime )
 
 		RString sCommand = TI.m_sCommandName;
 		if( bBeginning )			// we are just beginning this tween
+		{
 			m_start = m_current;	// set the start position
+			SetCurrentTweenStart();
+		}
 
 		if( TI.m_fTimeLeftInTween == 0 )	// Current tween is over.  Stop.
 		{
@@ -645,6 +643,7 @@ void Actor::UpdateTweening( float fDeltaTime )
 			// delete the head tween
 			delete m_Tweens.front();
 			m_Tweens.erase( m_Tweens.begin() );
+			EraseHeadTween();
 		}
 		else	// in the middle of tweening. Recalcute the current position.
 		{
@@ -653,6 +652,7 @@ void Actor::UpdateTweening( float fDeltaTime )
 			// distort the percentage if appropriate
 			float fPercentAlongPath = TI.m_pTween->Tween( fPercentThroughTween );
 			TweenState::MakeWeightedAverage( m_current, m_start, TS, fPercentAlongPath );
+			UpdatePercentThroughTween(fPercentAlongPath);
 		}
 
 		if( bBeginning )
@@ -772,7 +772,7 @@ void Actor::UpdateInternal( float fDeltaTime )
 		default: break;
 	}
 
-	UpdateTweening( fDeltaTime );
+	this->UpdateTweening( fDeltaTime );
 }
 
 RString Actor::GetLineage() const
@@ -797,7 +797,7 @@ void Actor::BeginTweening( float time, ITween *pTween )
 
 		LOG->Warn( "%s", sError.c_str() );
 		Dialog::OK( sError );
-		FinishTweening();
+		this->FinishTweening();
 	}
 
 	// add a new TweenState to the tail, and initialize it
@@ -829,7 +829,7 @@ void Actor::BeginTweening( float time, TweenType tt )
 	ASSERT( time >= 0 );
 
 	ITween *pTween = ITween::CreateFromType( tt );
-	BeginTweening( time, pTween );
+	this->BeginTweening( time, pTween );
 }
 
 void Actor::StopTweening()
@@ -843,7 +843,7 @@ void Actor::FinishTweening()
 {
 	if( !m_Tweens.empty() )
 		m_current = DestTweenState();
-	StopTweening();
+	this->StopTweening();
 }
 
 void Actor::HurryTweening( float factor )

src/Actor.h

@@ -270,6 +270,10 @@ class Actor : public MessageSubscriber
 	virtual void Update( float fDeltaTime );		// this can short circuit UpdateInternal
 	virtual void UpdateInternal( float fDeltaTime );	// override this
 	void UpdateTweening( float fDeltaTime );
+	// These next functions should all be overridden by a derived class that has its own tweening states to handl.
+	virtual void SetCurrentTweenStart() {}
+	virtual void EraseHeadTween() {}
+	virtual void UpdatePercentThroughTween( float PercentThroughTween ) {}
 
 	/**
 	 * @brief Retrieve the Actor's name.
@@ -449,9 +453,9 @@ class Actor : public MessageSubscriber
 	void SetAux( float f )				{ DestTweenState().aux = f; }
 	float GetAux() const				{ return m_current.aux; }
 
-	void BeginTweening( float time, ITween *pInterp );
+	virtual void BeginTweening( float time, ITween *pInterp );
 	void BeginTweening( float time, TweenType tt = TWEEN_LINEAR );
-	void StopTweening();
+	virtual void StopTweening();
 	void Sleep( float time );
 	void QueueCommand( const RString& sCommandName );
 	void QueueMessage( const RString& sMessageName );