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diff --git a/examples/opengl/pbuffers/cube.h b/examples/opengl/pbuffers/cube.h
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+++ b/examples/opengl/pbuffers/cube.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 examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CUBE_H
+#define CUBE_H
+
+#include <QtOpenGL/qgl.h>
+#include <QtCore/qvector.h>
+#include <QtCore/qsequentialanimationgroup.h>
+#include <QtGui/qmatrix4x4.h>
+#include <QtGui/qvector3d.h>
+#include <QtGui/qvector2d.h>
+
+QT_BEGIN_NAMESPACE
+class QPropertyAnimation;
+QT_END_NAMESPACE
+
+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 *rtn;
+    QSequentialAnimationGroup *animGroup;
+    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