private Balloon getBalloonWithFixedY(double y) {
Balloon result = simple.getBalloonWithFixedY(y);
result = result.rotate(rotationInverse);
result = result.translate(translateO);
return result;
}
public Balloon getCenterWithFixedRadius(double radius) {
final Point2D centerSimple = simple.getCenterWithFixedRadius(radius);
return new Balloon(rotationInverse.getPoint(translateO.getTranslated(centerSimple)), radius);
}
