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diff --git a/src/runtime/Qt3DSPresentationFrameData.cpp b/src/runtime/Qt3DSPresentationFrameData.cpp
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+++ b/src/runtime/Qt3DSPresentationFrameData.cpp
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+/****************************************************************************
+**
+** Copyright (C) 1993-2009 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "RuntimePrefix.h"
+
+//==============================================================================
+//	Includes
+//==============================================================================
+#include "Qt3DSPresentationFrameData.h"
+
+//==============================================================================
+//	Namespace
+//==============================================================================
+namespace Q3DStudio {
+
+//==============================================================================
+//	Constants
+//==============================================================================
+const FLOAT DIRTY_STORE_RATIO = 0.1f;
+const FLOAT TRAVERSAL_STORE_RATIO = 0.5f;
+const FLOAT ACTIVATION_STORE_RATIO = 0.3f;
+const FLOAT DEACTIVATION_STORE_RATIO = 0.3f;
+
+//==============================================================================
+/**
+ *	Constructor
+ */
+CPresentationFrameData::CPresentationFrameData()
+    : m_DirtyList(0, 0, "Frame:DirtyList")
+    , m_TraversalList(0, 0, "Frame:TraversalList")
+    , m_ScriptsList(0, 0, "Frame:ScriptsList")
+    , m_ActivationList(0, 0, "Frame:ActivationList")
+    , m_DeactivationList(0, 0, "Frame:DeactivationList") /*,*/
+// m_SlideExitList( 0, 0, "Frame:SlideExitList" ),
+// m_SlideEnterList( 0, 0, "Frame:SlideEnterList" )
+{
+}
+
+//==============================================================================
+/**
+ *	Reserve memory from the memory subsytem to store the various arrays.
+ *	@param inElementCount	the number of elements loaded
+ */
+void CPresentationFrameData::Reserve(const INT32 /*inElementCount*/)
+{
+}
+
+//==============================================================================
+/**
+ *	Clean up the data. This is usually called at the start of the frame rhythm to
+ *	clean up the data from previous frame
+ *	Memory allocation should be clear by default.
+ *	Previous list could be a lot longer than current or future list which means
+ *	the appliation is using more memory than needed.  The heuristics of both
+ *	initialization and runtime freeing is dependent on the presentation.
+ */
+void CPresentationFrameData::Reset()
+{
+    // Keep the capacity of these lists every frame since they have consistent
+    // sizes from frame to frame
+    m_TraversalList.Clear(false);
+    m_ScriptsList.Clear(false);
+
+    // These lists are more sporatic (slide changes) for now, clear them as
+    // above but potential memory saving could occur by calling Clear( true ) instead
+    m_ActivationList.Clear(false);
+    m_DeactivationList.Clear(false);
+
+    // NOTE: When we clear the dirty list, we also must ensure that the elements
+    // themselves are un-dirtied to prepare for the next frame.  This is done
+    // by the caller of "CPresentationFrameData::Reset"
+    m_DirtyList.Clear(false);
+
+    // m_SlideExitList.Clear( false );
+    // m_SlideEnterList.Clear( false );
+}
+
+} // namespace Q3DStudio