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diff --git a/src/gui/math3d/qvector4d.h b/src/gui/math3d/qvector4d.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QVECTOR4D_H
+#define QVECTOR4D_H
+
+#include <QtCore/qpoint.h>
+#include <QtCore/qmetatype.h>
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+QT_MODULE(Gui)
+
+class QMatrix4x4;
+class QVector2D;
+class QVector3D;
+class QQuaternion;
+
+#ifndef QT_NO_VECTOR4D
+
+class Q_GUI_EXPORT QVector4D
+{
+public:
+    QVector4D();
+    QVector4D(qreal xpos, qreal ypos, qreal zpos, qreal wpos);
+    explicit QVector4D(const QPoint& point);
+    explicit QVector4D(const QPointF& point);
+#ifndef QT_NO_VECTOR2D
+    QVector4D(const QVector2D& vector);
+    QVector4D(const QVector2D& vector, qreal zpos, qreal wpos);
+#endif
+#ifndef QT_NO_VECTOR3D
+    QVector4D(const QVector3D& vector);
+    QVector4D(const QVector3D& vector, qreal wpos);
+#endif
+
+    bool isNull() const;
+
+    qreal x() const;
+    qreal y() const;
+    qreal z() const;
+    qreal w() const;
+
+    void setX(qreal x);
+    void setY(qreal y);
+    void setZ(qreal z);
+    void setW(qreal w);
+
+    qreal length() const;
+    qreal lengthSquared() const;
+
+    QVector4D normalized() const;
+    void normalize();
+
+    QVector4D &operator+=(const QVector4D &vector);
+    QVector4D &operator-=(const QVector4D &vector);
+    QVector4D &operator*=(qreal factor);
+    QVector4D &operator*=(const QVector4D &vector);
+    QVector4D &operator/=(qreal divisor);
+
+    static qreal dotProduct(const QVector4D& v1, const QVector4D& v2);
+
+    friend inline bool operator==(const QVector4D &v1, const QVector4D &v2);
+    friend inline bool operator!=(const QVector4D &v1, const QVector4D &v2);
+    friend inline const QVector4D operator+(const QVector4D &v1, const QVector4D &v2);
+    friend inline const QVector4D operator-(const QVector4D &v1, const QVector4D &v2);
+    friend inline const QVector4D operator*(qreal factor, const QVector4D &vector);
+    friend inline const QVector4D operator*(const QVector4D &vector, qreal factor);
+    friend inline const QVector4D operator*(const QVector4D &v1, const QVector4D& v2);
+    friend inline const QVector4D operator-(const QVector4D &vector);
+    friend inline const QVector4D operator/(const QVector4D &vector, qreal divisor);
+
+    friend inline bool qFuzzyCompare(const QVector4D& v1, const QVector4D& v2);
+
+#ifndef QT_NO_VECTOR2D
+    QVector2D toVector2D() const;
+    QVector2D toVector2DAffine() const;
+#endif
+#ifndef QT_NO_VECTOR3D
+    QVector3D toVector3D() const;
+    QVector3D toVector3DAffine() const;
+#endif
+
+    QPoint toPoint() const;
+    QPointF toPointF() const;
+
+private:
+    float xp, yp, zp, wp;
+
+    QVector4D(float xpos, float ypos, float zpos, float wpos, int dummy);
+
+    friend class QVector2D;
+    friend class QVector3D;
+    friend class QQuaternion;
+    friend class QMatrix4x4;
+#ifndef QT_NO_MATRIX4X4
+    friend QVector4D operator*(const QVector4D& vector, const QMatrix4x4& matrix);
+    friend QVector4D operator*(const QMatrix4x4& matrix, const QVector4D& vector);
+#endif
+};
+
+inline QVector4D::QVector4D() : xp(0.0f), yp(0.0f), zp(0.0f), wp(0.0f) {}
+
+inline QVector4D::QVector4D(qreal xpos, qreal ypos, qreal zpos, qreal wpos) : xp(xpos), yp(ypos), zp(zpos), wp(wpos) {}
+
+inline QVector4D::QVector4D(float xpos, float ypos, float zpos, float wpos, int) : xp(xpos), yp(ypos), zp(zpos), wp(wpos) {}
+
+inline QVector4D::QVector4D(const QPoint& point) : xp(point.x()), yp(point.y()), zp(0.0f), wp(0.0f) {}
+
+inline QVector4D::QVector4D(const QPointF& point) : xp(point.x()), yp(point.y()), zp(0.0f), wp(0.0f) {}
+
+inline bool QVector4D::isNull() const
+{
+    return qIsNull(xp) && qIsNull(yp) && qIsNull(zp) && qIsNull(wp);
+}
+
+inline qreal QVector4D::x() const { return qreal(xp); }
+inline qreal QVector4D::y() const { return qreal(yp); }
+inline qreal QVector4D::z() const { return qreal(zp); }
+inline qreal QVector4D::w() const { return qreal(wp); }
+
+inline void QVector4D::setX(qreal x) { xp = x; }
+inline void QVector4D::setY(qreal y) { yp = y; }
+inline void QVector4D::setZ(qreal z) { zp = z; }
+inline void QVector4D::setW(qreal w) { wp = w; }
+
+inline QVector4D &QVector4D::operator+=(const QVector4D &vector)
+{
+    xp += vector.xp;
+    yp += vector.yp;
+    zp += vector.zp;
+    wp += vector.wp;
+    return *this;
+}
+
+inline QVector4D &QVector4D::operator-=(const QVector4D &vector)
+{
+    xp -= vector.xp;
+    yp -= vector.yp;
+    zp -= vector.zp;
+    wp -= vector.wp;
+    return *this;
+}
+
+inline QVector4D &QVector4D::operator*=(qreal factor)
+{
+    xp *= factor;
+    yp *= factor;
+    zp *= factor;
+    wp *= factor;
+    return *this;
+}
+
+inline QVector4D &QVector4D::operator*=(const QVector4D &vector)
+{
+    xp *= vector.xp;
+    yp *= vector.yp;
+    zp *= vector.zp;
+    wp *= vector.wp;
+    return *this;
+}
+
+inline QVector4D &QVector4D::operator/=(qreal divisor)
+{
+    xp /= divisor;
+    yp /= divisor;
+    zp /= divisor;
+    wp /= divisor;
+    return *this;
+}
+
+inline bool operator==(const QVector4D &v1, const QVector4D &v2)
+{
+    return v1.xp == v2.xp && v1.yp == v2.yp && v1.zp == v2.zp && v1.wp == v2.wp;
+}
+
+inline bool operator!=(const QVector4D &v1, const QVector4D &v2)
+{
+    return v1.xp != v2.xp || v1.yp != v2.yp || v1.zp != v2.zp || v1.wp != v2.wp;
+}
+
+inline const QVector4D operator+(const QVector4D &v1, const QVector4D &v2)
+{
+    return QVector4D(v1.xp + v2.xp, v1.yp + v2.yp, v1.zp + v2.zp, v1.wp + v2.wp, 1);
+}
+
+inline const QVector4D operator-(const QVector4D &v1, const QVector4D &v2)
+{
+    return QVector4D(v1.xp - v2.xp, v1.yp - v2.yp, v1.zp - v2.zp, v1.wp - v2.wp, 1);
+}
+
+inline const QVector4D operator*(qreal factor, const QVector4D &vector)
+{
+    return QVector4D(vector.xp * factor, vector.yp * factor, vector.zp * factor, vector.wp * factor, 1);
+}
+
+inline const QVector4D operator*(const QVector4D &vector, qreal factor)
+{
+    return QVector4D(vector.xp * factor, vector.yp * factor, vector.zp * factor, vector.wp * factor, 1);
+}
+
+inline const QVector4D operator*(const QVector4D &v1, const QVector4D& v2)
+{
+    return QVector4D(v1.xp * v2.xp, v1.yp * v2.yp, v1.zp * v2.zp, v1.wp * v2.wp, 1);
+}
+
+inline const QVector4D operator-(const QVector4D &vector)
+{
+    return QVector4D(-vector.xp, -vector.yp, -vector.zp, -vector.wp, 1);
+}
+
+inline const QVector4D operator/(const QVector4D &vector, qreal divisor)
+{
+    return QVector4D(vector.xp / divisor, vector.yp / divisor, vector.zp / divisor, vector.wp / divisor, 1);
+}
+
+inline bool qFuzzyCompare(const QVector4D& v1, const QVector4D& v2)
+{
+    return qFuzzyCompare(v1.xp, v2.xp) &&
+           qFuzzyCompare(v1.yp, v2.yp) &&
+           qFuzzyCompare(v1.zp, v2.zp) &&
+           qFuzzyCompare(v1.wp, v2.wp);
+}
+
+inline QPoint QVector4D::toPoint() const
+{
+    return QPoint(qRound(xp), qRound(yp));
+}
+
+inline QPointF QVector4D::toPointF() const
+{
+    return QPointF(qreal(xp), qreal(yp));
+}
+
+#ifndef QT_NO_DEBUG_STREAM
+Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QVector4D &vector);
+#endif
+
+#endif
+
+QT_END_NAMESPACE
+
+#ifndef QT_NO_VECTOR4D
+Q_DECLARE_METATYPE(QVector4D)
+#endif
+
+QT_END_HEADER
+
+#endif