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diff --git a/src/imports/particles/particleaffector.cpp b/src/imports/particles/particleaffector.cpp
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+++ b/src/imports/particles/particleaffector.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Declarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "particleaffector.h"
+#include <QDebug>
+QT_BEGIN_NAMESPACE
+ParticleAffector::ParticleAffector(QSGItem *parent) :
+    QSGItem(parent), m_needsReset(false), m_system(0), m_active(true), m_updateIntSet(false)
+{
+    connect(this, SIGNAL(systemChanged(ParticleSystem*)),
+            this, SLOT(updateOffsets()));
+    connect(this, SIGNAL(xChanged()),
+            this, SLOT(updateOffsets()));
+    connect(this, SIGNAL(yChanged()),
+            this, SLOT(updateOffsets()));//TODO: in componentComplete and all relevant signals
+}
+
+void ParticleAffector::componentComplete()
+{
+    if(!m_system)
+        qWarning() << "Affector created without a particle system specified";//TODO: useful QML warnings, like line number?
+    QSGItem::componentComplete();
+}
+
+void ParticleAffector::affectSystem(qreal dt)
+{
+    if(!m_active)
+        return;
+    if(!m_system){
+        qDebug() << "No system" << this;
+        return;
+    }
+    //If not reimplemented, calls affect particle per particle
+    //But only on particles in targeted system/area
+    if(m_updateIntSet){
+        m_groups.clear();
+        foreach(const QString &p, m_particles)
+            m_groups << m_system->m_groupIds[p];//###Can this occur before group ids are properly assigned?
+        m_updateIntSet = false;
+    }
+    //foreach(ParticleData* d, m_system->m_data){
+    for(int i=0; i<m_system->m_particle_count; i++){
+        ParticleData* d = m_system->m_data[i];
+        if(!d || (m_onceOff && m_onceOffed.contains(d->systemIndex)))
+            continue;
+        if(m_groups.isEmpty() || m_groups.contains(d->group)){
+            if(width() == 0 || height() == 0 || QRectF(m_offset.x(), m_offset.y(), width(), height()).contains(d->curX(), d->curY())){
+                if(affectParticle(d, dt)){
+                    m_system->m_needsReset << d;
+                    if(m_onceOff)
+                        m_onceOffed << d->systemIndex;
+                }
+            }
+        }
+    }
+}
+
+bool ParticleAffector::affectParticle(ParticleData *d, qreal dt)
+{
+    Q_UNUSED(d);
+    Q_UNUSED(dt);
+    return false;
+}
+
+void ParticleAffector::reset(int idx)
+{//TODO: This, among other ones, should be restructured so they don't all need to remember to call the superclass
+    if(m_onceOff)
+        m_onceOffed.remove(idx);
+}
+
+void ParticleAffector::updateOffsets()
+{
+    if(m_system)
+        m_offset = m_system->mapFromItem(this, QPointF(0, 0));
+}
+
+QT_END_NAMESPACE