QGraphicsItem disappeare during rotation around Qt::XAxis

[radek.z]

Hi,
I can't find the reason, why my object disappearing during transformation around the XAxis.
I am showing here the short code which better expain what I mean.
When I use QTransform on the scene and rotate the view, then if i use high angle the QGraphicsRectItem disappeare.
Or if I make the view window height bigger, which anybody who would help me can try in this small app.

#include <QApplication>
#include <QGraphicsView>
 
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
 
    QGraphicsScene scene;
    scene.addRect(QRectF(0,0,100,100), QPen(), QBrush(QColor(Qt::red)));
    QGraphicsView view(&scene);
    view.show();
 
    QTransform transform;
    transform.rotate(80, Qt::XAxis);
    view.setTransform(transform);
 
    return app.exec();
}

#include <QApplication>
#include <QGraphicsView>


int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QGraphicsScene scene;
    scene.addRect(QRectF(0,0,100,100), QPen(), QBrush(QColor(Qt::red)));
    QGraphicsView view(&scene);
    view.show();

    QTransform transform;
    transform.rotate(80, Qt::XAxis);
    view.setTransform(transform);

    return app.exec();
}

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