a_max = settings.value("max", a_max).toDouble();
divisions = settings.value("divisions", divisions).toInt();
angle_step = settings.value("angle_step", angle_step).toInt();
a_max = settings.value("max", a_max).toDouble();
divisions = settings.value("divisions", divisions).toInt();
angle_step = settings.value("angle_step", angle_step).toInt();