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probe to find out which parameters of the transform function are used

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Chris Danford
2006-01-30 00:50:00 +00:00
parent 70ebb87aaf
commit 58986cfcce
3 changed files with 17 additions and 8 deletions
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stepmania/src/ActorScroller.cpp
+14 -7
View File
@@ -29,7 +29,8 @@ ActorScroller::ActorScroller()
m_iFirstSubActorIndex = 0;
m_bLoop = false;
m_bFastCatchup = false;
m_bUseItemNumber = false;
m_bFunctionDependsOnPositionOffset = true;
m_bFunctionDependsOnItemIndex = true;
m_fPauseCountdownSeconds = 0;
m_fQuantizePixels = 0;
@@ -59,6 +60,12 @@ void ActorScroller::Load2(
void ActorScroller::SetTransformFromExpression( const RString &sTransformFunction )
{
m_exprTransformFunction.SetFromExpression( sTransformFunction );
// Probe to find which of the parameters are used.
#define GP(a,b) m_exprTransformFunction.GetPosition( a, b, 2 )
m_bFunctionDependsOnPositionOffset = (GP(0,0) != GP(1,0)) && (GP(0,1) != GP(1,1));
m_bFunctionDependsOnItemIndex = (GP(0,0) != GP(0,1)) && (GP(1,0) != GP(1,1));
m_exprTransformFunction.ClearCache();
}
void ActorScroller::SetTransformFromHeight( float fItemHeight )
@@ -132,11 +139,6 @@ void ActorScroller::LoadFromNode( const RString &sDir, const XNode *pNode )
EnableMask( 10, 10 ); // XXX
pNode->GetAttrValue( "QuantizePixels", m_fQuantizePixels );
/* By default, don't use item numbers. On scrollers with lots of items,
* especially with Subdivisions > 1, m_exprTransformFunction uses too
* much memory, and very few scrollers use this. */
pNode->GetAttrValue( "UseItemNumber", m_bUseItemNumber );
}
void ActorScroller::UpdateInternal( float fDeltaTime )
@@ -260,7 +262,12 @@ void ActorScroller::PositionItemsAndDrawPrimitives( bool bDrawPrimitives )
else if( iIndex < 0 || iIndex >= (int)m_SubActors.size() )
continue;
if( !m_bUseItemNumber )
// Optimization: Zero out unused parameters so that they don't create new, unnecessary
// entries in the position cache. On scrollers with lots of items,
// especially with Subdivisions > 1, m_exprTransformFunction uses too much memory.
if( !m_bFunctionDependsOnPositionOffset )
fPosition = 0;
if( !m_bFunctionDependsOnItemIndex )
iItem = 0;
m_exprTransformFunction.PositionItem( m_SubActors[iIndex], fPosition, iItem, m_iNumItems );
stepmania/src/ActorScroller.h
+2 -1
View File
@@ -62,7 +62,8 @@ protected:
int m_iFirstSubActorIndex;
bool m_bLoop;
bool m_bFastCatchup;
bool m_bUseItemNumber;
bool m_bFunctionDependsOnPositionOffset;
bool m_bFunctionDependsOnItemIndex;
float m_fPauseCountdownSeconds;
float m_fQuantizePixels;
stepmania/src/LuaExpressionTransform.h
+1
View File
@@ -17,6 +17,7 @@ public:
void PositionItem( Actor *pActor, float fPositionOffsetFromCenter, int iItemIndex, int iNumItems );
const Actor::TweenState &GetPosition( float fPositionOffsetFromCenter, int iItemIndex, int iNumItems ) const;
void ClearCache() { m_mapPositionToTweenStateCache.clear(); }
protected: