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diff --git a/src/quick/particles/qquickgravity.cpp b/src/quick/particles/qquickgravity.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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickgravity_p.h"
+#include <cmath>
+QT_BEGIN_NAMESPACE
+const qreal CONV = 0.017453292520444443;
+/*!
+    \qmlclass Gravity QQuickGravityAffector
+    \inqmlmodule QtQuick.Particles 2
+    \inherits Affector
+    \brief The Gravity element allows you to set an accleration in an angle
+
+    This element will accelerate all affected particles to a vector of
+    the specified magnitude in the specified angle. If the angle and acceleration do
+    not vary, it is more efficient to set the specified acceleration on the Emitter.
+
+    This element models the gravity of a massive object whose center of
+    gravity is far away (and thus the gravitational pull is effectively constant
+    across the scene). To model the gravity of an object near or inside the scene,
+    use PointAttractor.
+*/
+
+/*!
+    \qmlproperty real QtQuick.Particles2::Gravity::magnitude
+
+    Pixels per second that objects will be accelerated by.
+*/
+/*!
+    \qmlproperty real QtQuick.Particles2::Gravity::acceleration
+
+    Name changed to magnitude, will be removed soon.
+*/
+/*!
+    \qmlproperty real QtQuick.Particles2::Gravity::angle
+
+    Angle of acceleration.
+*/
+
+QQuickGravityAffector::QQuickGravityAffector(QQuickItem *parent) :
+    QQuickParticleAffector(parent), m_magnitude(-10), m_angle(90), m_needRecalc(true)
+{
+}
+
+bool QQuickGravityAffector::affectParticle(QQuickParticleData *d, qreal dt)
+{
+    if (!m_magnitude)
+        return false;
+    if (m_needRecalc) {
+        m_needRecalc = false;
+        m_dx = m_magnitude * cos(m_angle * CONV);
+        m_dy = m_magnitude * sin(m_angle * CONV);
+    }
+
+    d->setInstantaneousVX(d->curVX() + m_dx*dt);
+    d->setInstantaneousVY(d->curVY() + m_dy*dt);
+    return true;
+}
+QT_END_NAMESPACE