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diff --git a/examples/opengl/pbuffers/cube.h b/examples/opengl/pbuffers/cube.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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 CUBE_H
+#define CUBE_H
+
+#include <QtOpenGl/qgl.h>
+#include <QtCore/qvector.h>
+#include <QtGui/qmatrix4x4.h>
+#include <QtGui/qvector3d.h>
+#include <QtGui/qvector2d.h>
+
+class QPropertyAnimation;
+
+class Geometry
+{
+public:
+    void loadArrays() const;
+    void addQuad(const QVector3D &a, const QVector3D &b,
+                 const QVector3D &c, const QVector3D &d,
+                 const QVector<QVector2D> &tex);
+    void setColors(int start, GLfloat colors[4][4]);
+    const GLushort *indices() const { return faces.constData(); }
+    int count() const { return faces.count(); }
+private:
+    QVector<GLushort> faces;
+    QVector<QVector3D> vertices;
+    QVector<QVector3D> normals;
+    QVector<QVector2D> texCoords;
+    QVector<QVector4D> colors;
+    int append(const QVector3D &a, const QVector3D &n, const QVector2D &t);
+    void addTri(const QVector3D &a, const QVector3D &b, const QVector3D &c, const QVector3D &n);
+    friend class Tile;
+};
+
+class Tile
+{
+public:
+    void draw() const;
+    void setColors(GLfloat[4][4]);
+protected:
+    Tile(const QVector3D &loc = QVector3D());
+    QVector3D location;
+    QQuaternion orientation;
+private:
+    int start;
+    int count;
+    bool useFlatColor;
+    GLfloat faceColor[4];
+    Geometry *geom;
+    friend class TileBuilder;
+};
+
+class TileBuilder
+{
+public:
+    enum { bl, br, tr, tl };
+    TileBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
+    Tile *newTile(const QVector3D &loc = QVector3D()) const;
+    void setColor(QColor c) { color = c; }
+protected:
+    void initialize(Tile *) const;
+    QVector<QVector3D> verts;
+    QVector<QVector2D> tex;
+    int start;
+    int count;
+    Geometry *geom;
+    QColor color;
+};
+
+class Cube : public QObject, public Tile
+{
+    Q_OBJECT
+    Q_PROPERTY(qreal range READ range WRITE setRange);
+    Q_PROPERTY(qreal altitude READ altitude WRITE setAltitude);
+    Q_PROPERTY(qreal rotation READ rotation WRITE setRotation);
+public:
+    Cube(const QVector3D &loc = QVector3D());
+    ~Cube();
+    qreal range() { return location.x(); }
+    void setRange(qreal r);
+    qreal altitude() { return location.y(); }
+    void setAltitude(qreal a);
+    qreal rotation() { return rot; }
+    void setRotation(qreal r);
+    void removeBounce();
+    void startAnimation();
+    void setAnimationPaused(bool paused);
+signals:
+    void changed();
+private:
+    qreal rot;
+    QPropertyAnimation *r;
+    QPropertyAnimation *a;
+    QPropertyAnimation *rtn;
+    qreal startx;
+    friend class CubeBuilder;
+};
+
+class CubeBuilder : public TileBuilder
+{
+public:
+    CubeBuilder(Geometry *, qreal depth = 0.0f, qreal size = 1.0f);
+    Cube *newCube(const QVector3D &loc = QVector3D()) const;
+private:
+    mutable int ix;
+};
+
+#endif // CUBE_H