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diff --git a/src/gui/math3d/qvector4d.h b/src/gui/math3d/qvector4d.h
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+++ 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 $MODULE$ of the Qt Toolkit.
+**
+** $TROLLTECH_DUAL_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QVECTOR4D_H
+#define QVECTOR4D_H
+
+#include <QtGui/qmath3dglobal.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);
+ QVector4D(int xpos, int ypos, int zpos, int 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:
+ qrealinner xp, yp, zp, wp;
+
+ QVector4D(qrealinner xpos, qrealinner ypos, qrealinner zpos, qrealinner wpos, int dummy);
+
+ friend class QVector2D;
+ friend class QVector3D;
+ friend class QQuaternion;
+ friend class QMatrix4x4;
+ friend class QVertexArray;
+#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(qrealinner xpos, qrealinner ypos, qrealinner zpos, qrealinner wpos, int) : xp(xpos), yp(ypos), zp(zpos), wp(wpos) {}
+
+inline QVector4D::QVector4D(int xpos, int ypos, int zpos, int wpos) : 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 qt_math3d_convert<qreal, qrealinner>(xp); }
+inline qreal QVector4D::y() const { return qt_math3d_convert<qreal, qrealinner>(yp); }
+inline qreal QVector4D::z() const { return qt_math3d_convert<qreal, qrealinner>(zp); }
+inline qreal QVector4D::w() const { return qt_math3d_convert<qreal, qrealinner>(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)
+{
+ qrealinner f(factor);
+ xp *= f;
+ yp *= f;
+ zp *= f;
+ wp *= f;
+ 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)
+{
+ qrealinner d(divisor);
+ xp /= d;
+ yp /= d;
+ zp /= d;
+ wp /= d;
+ 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)
+{
+ qrealinner f(factor);
+ return QVector4D(vector.xp * f, vector.yp * f, vector.zp * f, vector.wp * f, 1);
+}
+
+inline const QVector4D operator*(const QVector4D &vector, qreal factor)
+{
+ qrealinner f(factor);
+ return QVector4D(vector.xp * f, vector.yp * f, vector.zp * f, vector.wp * f, 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)
+{
+ qrealinner d(divisor);
+ return QVector4D(vector.xp / d, vector.yp / d, vector.zp / d, vector.wp / d, 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(qt_math3d_convert<qreal, qrealinner>(xp),
+ qt_math3d_convert<qreal, qrealinner>(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
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