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diff --git a/src/gui/math3d/qquaternion.h b/src/gui/math3d/qquaternion.h
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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 QtGui 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUATERNION_H
+#define QQUATERNION_H
+
+#include <QtGui/qvector3d.h>
+#include <QtGui/qvector4d.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+#ifndef QT_NO_QUATERNION
+
+class QMatrix4x4;
+class QVariant;
+
+class Q_GUI_EXPORT QQuaternion
+{
+public:
+    QQuaternion();
+    QQuaternion(qreal scalar, qreal xpos, qreal ypos, qreal zpos);
+#ifndef QT_NO_VECTOR3D
+    QQuaternion(qreal scalar, const QVector3D& vector);
+#endif
+#ifndef QT_NO_VECTOR4D
+    explicit QQuaternion(const QVector4D& vector);
+#endif
+
+    bool isNull() const;
+    bool isIdentity() const;
+
+#ifndef QT_NO_VECTOR3D
+    QVector3D vector() const;
+    void setVector(const QVector3D& vector);
+#endif
+    void setVector(qreal x, qreal y, qreal z);
+
+    qreal x() const;
+    qreal y() const;
+    qreal z() const;
+    qreal scalar() const;
+
+    void setX(qreal x);
+    void setY(qreal y);
+    void setZ(qreal z);
+    void setScalar(qreal scalar);
+
+    qreal length() const;
+    qreal lengthSquared() const;
+
+    QQuaternion normalized() const;
+    void normalize();
+
+    QQuaternion conjugate() const;
+
+    QVector3D rotatedVector(const QVector3D& vector) const;
+
+    QQuaternion &operator+=(const QQuaternion &quaternion);
+    QQuaternion &operator-=(const QQuaternion &quaternion);
+    QQuaternion &operator*=(qreal factor);
+    QQuaternion &operator*=(const QQuaternion &quaternion);
+    QQuaternion &operator/=(qreal divisor);
+
+    friend inline bool operator==(const QQuaternion &q1, const QQuaternion &q2);
+    friend inline bool operator!=(const QQuaternion &q1, const QQuaternion &q2);
+    friend inline const QQuaternion operator+(const QQuaternion &q1, const QQuaternion &q2);
+    friend inline const QQuaternion operator-(const QQuaternion &q1, const QQuaternion &q2);
+    friend inline const QQuaternion operator*(qreal factor, const QQuaternion &quaternion);
+    friend inline const QQuaternion operator*(const QQuaternion &quaternion, qreal factor);
+    friend inline const QQuaternion operator*(const QQuaternion &q1, const QQuaternion& q2);
+    friend inline const QQuaternion operator-(const QQuaternion &quaternion);
+    friend inline const QQuaternion operator/(const QQuaternion &quaternion, qreal divisor);
+
+    friend inline bool qFuzzyCompare(const QQuaternion& q1, const QQuaternion& q2);
+
+#ifndef QT_NO_VECTOR4D
+    QVector4D toVector4D() const;
+#endif
+
+    operator QVariant() const;
+
+#ifndef QT_NO_VECTOR3D
+    static QQuaternion fromAxisAndAngle(const QVector3D& axis, qreal angle);
+#endif
+    static QQuaternion fromAxisAndAngle
+            (qreal x, qreal y, qreal z, qreal angle);
+
+    static QQuaternion slerp
+        (const QQuaternion& q1, const QQuaternion& q2, qreal t);
+    static QQuaternion nlerp
+        (const QQuaternion& q1, const QQuaternion& q2, qreal t);
+
+private:
+    qreal wp, xp, yp, zp;
+};
+
+Q_DECLARE_TYPEINFO(QQuaternion, Q_MOVABLE_TYPE);
+
+inline QQuaternion::QQuaternion() : wp(1.0f), xp(0.0f), yp(0.0f), zp(0.0f) {}
+
+inline QQuaternion::QQuaternion(qreal aScalar, qreal xpos, qreal ypos, qreal zpos) : wp(aScalar), xp(xpos), yp(ypos), zp(zpos) {}
+
+
+inline bool QQuaternion::isNull() const
+{
+    return qIsNull(xp) && qIsNull(yp) && qIsNull(zp) && qIsNull(wp);
+}
+
+inline bool QQuaternion::isIdentity() const
+{
+    return qIsNull(xp) && qIsNull(yp) && qIsNull(zp) && wp == 1.0f;
+}
+
+inline qreal QQuaternion::x() const { return qreal(xp); }
+inline qreal QQuaternion::y() const { return qreal(yp); }
+inline qreal QQuaternion::z() const { return qreal(zp); }
+inline qreal QQuaternion::scalar() const { return qreal(wp); }
+
+inline void QQuaternion::setX(qreal aX) { xp = aX; }
+inline void QQuaternion::setY(qreal aY) { yp = aY; }
+inline void QQuaternion::setZ(qreal aZ) { zp = aZ; }
+inline void QQuaternion::setScalar(qreal aScalar) { wp = aScalar; }
+
+inline QQuaternion QQuaternion::conjugate() const
+{
+    return QQuaternion(wp, -xp, -yp, -zp);
+}
+
+inline QQuaternion &QQuaternion::operator+=(const QQuaternion &quaternion)
+{
+    xp += quaternion.xp;
+    yp += quaternion.yp;
+    zp += quaternion.zp;
+    wp += quaternion.wp;
+    return *this;
+}
+
+inline QQuaternion &QQuaternion::operator-=(const QQuaternion &quaternion)
+{
+    xp -= quaternion.xp;
+    yp -= quaternion.yp;
+    zp -= quaternion.zp;
+    wp -= quaternion.wp;
+    return *this;
+}
+
+inline QQuaternion &QQuaternion::operator*=(qreal factor)
+{
+    xp *= factor;
+    yp *= factor;
+    zp *= factor;
+    wp *= factor;
+    return *this;
+}
+
+inline const QQuaternion operator*(const QQuaternion &q1, const QQuaternion& q2)
+{
+    qreal ww = (q1.zp + q1.xp) * (q2.xp + q2.yp);
+    qreal yy = (q1.wp - q1.yp) * (q2.wp + q2.zp);
+    qreal zz = (q1.wp + q1.yp) * (q2.wp - q2.zp);
+    qreal xx = ww + yy + zz;
+    qreal qq = 0.5 * (xx + (q1.zp - q1.xp) * (q2.xp - q2.yp));
+
+    qreal w = qq - ww + (q1.zp - q1.yp) * (q2.yp - q2.zp);
+    qreal x = qq - xx + (q1.xp + q1.wp) * (q2.xp + q2.wp);
+    qreal y = qq - yy + (q1.wp - q1.xp) * (q2.yp + q2.zp);
+    qreal z = qq - zz + (q1.zp + q1.yp) * (q2.wp - q2.xp);
+
+    return QQuaternion(w, x, y, z);
+}
+
+inline QQuaternion &QQuaternion::operator*=(const QQuaternion &quaternion)
+{
+    *this = *this * quaternion;
+    return *this;
+}
+
+inline QQuaternion &QQuaternion::operator/=(qreal divisor)
+{
+    xp /= divisor;
+    yp /= divisor;
+    zp /= divisor;
+    wp /= divisor;
+    return *this;
+}
+
+inline bool operator==(const QQuaternion &q1, const QQuaternion &q2)
+{
+    return q1.xp == q2.xp && q1.yp == q2.yp && q1.zp == q2.zp && q1.wp == q2.wp;
+}
+
+inline bool operator!=(const QQuaternion &q1, const QQuaternion &q2)
+{
+    return q1.xp != q2.xp || q1.yp != q2.yp || q1.zp != q2.zp || q1.wp != q2.wp;
+}
+
+inline const QQuaternion operator+(const QQuaternion &q1, const QQuaternion &q2)
+{
+    return QQuaternion(q1.wp + q2.wp, q1.xp + q2.xp, q1.yp + q2.yp, q1.zp + q2.zp);
+}
+
+inline const QQuaternion operator-(const QQuaternion &q1, const QQuaternion &q2)
+{
+    return QQuaternion(q1.wp - q2.wp, q1.xp - q2.xp, q1.yp - q2.yp, q1.zp - q2.zp);
+}
+
+inline const QQuaternion operator*(qreal factor, const QQuaternion &quaternion)
+{
+    return QQuaternion(quaternion.wp * factor, quaternion.xp * factor, quaternion.yp * factor, quaternion.zp * factor);
+}
+
+inline const QQuaternion operator*(const QQuaternion &quaternion, qreal factor)
+{
+    return QQuaternion(quaternion.wp * factor, quaternion.xp * factor, quaternion.yp * factor, quaternion.zp * factor);
+}
+
+inline const QQuaternion operator-(const QQuaternion &quaternion)
+{
+    return QQuaternion(-quaternion.wp, -quaternion.xp, -quaternion.yp, -quaternion.zp);
+}
+
+inline const QQuaternion operator/(const QQuaternion &quaternion, qreal divisor)
+{
+    return QQuaternion(quaternion.wp / divisor, quaternion.xp / divisor, quaternion.yp / divisor, quaternion.zp / divisor);
+}
+
+inline bool qFuzzyCompare(const QQuaternion& q1, const QQuaternion& q2)
+{
+    return qFuzzyCompare(q1.xp, q2.xp) &&
+           qFuzzyCompare(q1.yp, q2.yp) &&
+           qFuzzyCompare(q1.zp, q2.zp) &&
+           qFuzzyCompare(q1.wp, q2.wp);
+}
+
+#ifndef QT_NO_VECTOR3D
+
+inline QQuaternion::QQuaternion(qreal aScalar, const QVector3D& aVector)
+    : wp(aScalar), xp(aVector.x()), yp(aVector.y()), zp(aVector.z()) {}
+
+inline void QQuaternion::setVector(const QVector3D& aVector)
+{
+    xp = aVector.x();
+    yp = aVector.y();
+    zp = aVector.z();
+}
+
+inline QVector3D QQuaternion::vector() const
+{
+    return QVector3D(xp, yp, zp);
+}
+
+#endif
+
+inline void QQuaternion::setVector(qreal aX, qreal aY, qreal aZ)
+{
+    xp = aX;
+    yp = aY;
+    zp = aZ;
+}
+
+#ifndef QT_NO_VECTOR4D
+
+inline QQuaternion::QQuaternion(const QVector4D& aVector)
+    : wp(aVector.w()), xp(aVector.x()), yp(aVector.y()), zp(aVector.z()) {}
+
+inline QVector4D QQuaternion::toVector4D() const
+{
+    return QVector4D(xp, yp, zp, wp);
+}
+
+#endif
+
+#ifndef QT_NO_DEBUG_STREAM
+Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QQuaternion &q);
+#endif
+
+#ifndef QT_NO_DATASTREAM
+Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QQuaternion &);
+Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QQuaternion &);
+#endif
+
+#endif
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif