Jason Felds
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
/* LuaExpressionTransform - */
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#ifndef LuaExpressionTransform_H
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#define LuaExpressionTransform_H
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#include "Actor.h"
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#include "LuaReference.h"
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#include <map>
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/**
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* @brief Handle transforming a list of items
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*
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* Cache item transforms based on fPositionOffsetFromCenter and iItemIndex for speed. */
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class LuaExpressionTransform
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{
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public:
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LuaExpressionTransform();
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~LuaExpressionTransform();
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void SetFromReference( const LuaReference &ref );
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void SetNumSubdivisions( int iNumSubdivisions ) { ASSERT( iNumSubdivisions > 0 ); m_iNumSubdivisions = iNumSubdivisions; }
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void TransformItemCached( Actor &a, float fPositionOffsetFromCenter, int iItemIndex, int iNumItems );
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void TransformItemDirect( Actor &a, float fPositionOffsetFromCenter, int iItemIndex, int iNumItems ) const;
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const Actor::TweenState &GetTransformCached( float fPositionOffsetFromCenter, int iItemIndex, int iNumItems ) const;
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void ClearCache() { m_mapPositionToTweenStateCache.clear(); }
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protected:
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LuaReference m_exprTransformFunction; // params: self,offset,itemIndex,numItems
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int m_iNumSubdivisions; // 1 == one evaluation per position
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struct PositionOffsetAndItemIndex
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{
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float fPositionOffsetFromCenter;
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int iItemIndex;
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bool operator<( const PositionOffsetAndItemIndex &other ) const
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{
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if( fPositionOffsetFromCenter != other.fPositionOffsetFromCenter )
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return fPositionOffsetFromCenter < other.fPositionOffsetFromCenter;
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return iItemIndex < other.iItemIndex;
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}
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};
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mutable map<PositionOffsetAndItemIndex,Actor::TweenState> m_mapPositionToTweenStateCache;
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};
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#endif
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/*
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* (c) 2003-2004 Chris Danford
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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