move Trasform caching out of ActorScroller and into LuaExpressionTransform so that ScreenOptions can use it too.

add RowOn/OffCommand to ScreenOptions
2005-09-03 17:37:42 +00:00
parent a2740445ef
commit 24440aa3bf
13 changed files with 278 additions and 133 deletions
@@ -0,0 +1,85 @@
+#include "global.h"
+#include "LuaExpressionTransform.h"
+#include "LuaReference.h"
+#include "LuaManager.h"
+
+LuaExpressionTransform::LuaExpressionTransform()
+{
+	m_pexprTransformFunction = new LuaExpression;
+	m_iNumSubdivisions = 1;
+}
+
+void LuaExpressionTransform::SetFromExpression( const CString &sExpression, int iNumSubdivisions )
+{
+	m_pexprTransformFunction->SetFromExpression( sExpression );
+	m_iNumSubdivisions = iNumSubdivisions;
+}
+
+const Actor::TweenState &LuaExpressionTransform::GetPosition( float fPositionOffsetFromCenter, int iItemIndex, int iNumItems )
+{
+	PositionOffsetAndItemIndex key = { fPositionOffsetFromCenter, iItemIndex };
+
+	map<PositionOffsetAndItemIndex,Actor::TweenState>::iterator iter = m_mapPositionToTweenStateCache.find( key );
+	if( iter != m_mapPositionToTweenStateCache.end() )
+		return iter->second;
+
+	Actor a;
+
+	Lua *L = LUA->Get();
+	m_pexprTransformFunction->PushSelf( L );
+	ASSERT( !lua_isnil(L, -1) );
+	a.PushSelf( L );
+	LuaHelpers::Push( fPositionOffsetFromCenter, L );
+	LuaHelpers::Push( iItemIndex, L );
+	LuaHelpers::Push( iNumItems, L );
+	lua_call( L, 4, 0 ); // 4 args, 0 results
+	LUA->Release(L);
+
+	return m_mapPositionToTweenStateCache[key] = a.DestTweenState();
+}
+
+void LuaExpressionTransform::PositionItem( Actor *pActor, float fPositionOffsetFromCenter, int iItemIndex, int iNumItems )
+{
+	float fInterval = 1.0f / m_iNumSubdivisions;
+	float fFloor = QuantizeDown( fPositionOffsetFromCenter, fInterval );
+	float fCeil = QuantizeUp( fPositionOffsetFromCenter, fInterval );
+
+	if( fFloor == fCeil )
+	{
+		pActor->DestTweenState() = GetPosition( fCeil, iItemIndex, iNumItems );
+	}
+	else
+	{
+		const Actor::TweenState &tsFloor = GetPosition( fFloor, iItemIndex, iNumItems );
+		const Actor::TweenState &tsCeil = GetPosition( fCeil, iItemIndex, iNumItems );
+
+		float fPercentTowardCeil = SCALE( fPositionOffsetFromCenter, fFloor, fCeil, 0.0f, 1.0f );
+		Actor::TweenState::MakeWeightedAverage( pActor->DestTweenState(), tsFloor, tsCeil, fPercentTowardCeil );
+	}
+}
+
+
+/*
+ * (c) 2003-2004 Chris Danford
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, and/or sell copies of the Software, and to permit persons to
+ * whom the Software is furnished to do so, provided that the above
+ * copyright notice(s) and this permission notice appear in all copies of
+ * the Software and that both the above copyright notice(s) and this
+ * permission notice appear in supporting documentation.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+ * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
+ * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
+ * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */