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diff --git a/src/imports/particles/speedlimitaffector.cpp b/src/imports/particles/speedlimitaffector.cpp
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+++ b/src/imports/particles/speedlimitaffector.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 "speedlimitaffector.h"
+#include <cmath>
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+SpeedLimitAffector::SpeedLimitAffector(QSGItem *parent) :
+    ParticleAffector(parent), m_speedLimit(-1)
+{
+}
+
+bool SpeedLimitAffector::affectParticle(ParticleData *d, qreal dt){
+    Q_UNUSED(dt);
+    if(m_speedLimit <= 0)
+        return false;
+
+    qreal x = d->curSX();
+    qreal y = d->curSY();
+    qreal s = sqrt(x*x + y*y);
+    if(s <= m_speedLimit)
+        return false;
+
+
+    if(s >= m_speedLimit*1.01){
+        qreal theta = atan2(y,x);
+        d->setInstantaneousSX(m_speedLimit * cos(theta));
+        d->setInstantaneousSY(m_speedLimit * sin(theta));
+    }
+
+    d->setInstantaneousAY(0);
+    d->setInstantaneousAX(0);
+
+    return true;
+}
+
+QT_END_NAMESPACE