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void VisualController::drawScene(GLenum mode)
{
    //ObjectsIterator it = objects.begin();
    //for(;it!=objects.end();++it)
    //    (*it)->draw(mode);
    VisualObject* current = NULL;
    QListIterator<VisualObject*> it(objects);
    while (it.hasNext())
    {
        current = it.next();
        if (current)
            current->draw(mode);
    }
};