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simplify algebraically; nudge both cases to look the same

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Glenn Maynard
2005-09-26 21:03:09 +00:00
parent 9110303bff
commit 5ca840d259
1 changed files with 10 additions and 10 deletions
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stepmania/src/ActorScroller.cpp
+10 -10
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@@ -213,24 +213,24 @@ void ActorScroller::PositionItemsAndDrawPrimitives( bool bDrawPrimitives )
if( !m_quadMask.GetHidden() ) if( !m_quadMask.GetHidden() )
{ {
// write to z buffer so that top and bottom are clipped // write to z buffer so that top and bottom are clipped
float fPositionFullyOnScreenTop = -(m_fNumItemsToDraw-1)/2.f; // Draw an extra item; this is the one that will be masked.
float fPositionFullyOnScreenBottom = (m_fNumItemsToDraw-1)/2.f; float fNumItemsToDraw = m_fNumItemsToDraw+1;
float fPositionFullyOffScreenTop = fPositionFullyOnScreenTop - 1; float fPositionFullyOnScreenTop = -(fNumItemsToDraw)/2.f;
float fPositionFullyOffScreenBottom = fPositionFullyOnScreenBottom + 1; float fPositionFullyOnScreenBottom = (fNumItemsToDraw)/2.f;
m_exprTransformFunction.PositionItem( &m_quadMask, fPositionFullyOffScreenTop, -1, m_SubActors.size() ); m_exprTransformFunction.PositionItem( &m_quadMask, fPositionFullyOnScreenTop, -1, m_SubActors.size() );
if( bDrawPrimitives ) m_quadMask.Draw(); if( bDrawPrimitives ) m_quadMask.Draw();
m_exprTransformFunction.PositionItem( &m_quadMask, fPositionFullyOffScreenBottom, m_SubActors.size(), m_SubActors.size() ); m_exprTransformFunction.PositionItem( &m_quadMask, fPositionFullyOnScreenBottom, m_SubActors.size(), m_SubActors.size() );
if( bDrawPrimitives ) m_quadMask.Draw(); if( bDrawPrimitives ) m_quadMask.Draw();
fFirstItemToDraw = fPositionFullyOffScreenTop + m_fCurrentItem; fFirstItemToDraw = m_fCurrentItem - fNumItemsToDraw/2.f;
fLastItemToDraw = fPositionFullyOffScreenBottom + m_fCurrentItem; fLastItemToDraw = m_fCurrentItem + fNumItemsToDraw/2.f;
} }
else else
{ {
fFirstItemToDraw = m_fCurrentItem - (m_fNumItemsToDraw)/2.f; fFirstItemToDraw = m_fCurrentItem - m_fNumItemsToDraw/2.f;
fLastItemToDraw = m_fCurrentItem + (m_fNumItemsToDraw)/2.f; fLastItemToDraw = m_fCurrentItem + m_fNumItemsToDraw/2.f;
} }
bool bDelayedDraw = m_bDrawByZPosition && !m_bLoop; bool bDelayedDraw = m_bDrawByZPosition && !m_bLoop;