public void bindY(DoubleProperty yProperty){
  minYWorld.bind(yProperty.add(getMinY()));
  maxYWorld.bind(minYWorld.add(getHeight()));
}

public void bindY ( DoubleProperty yProperty ) { minYWorld . bind ( yProperty . add ( getMinY ( ) ) ) ; maxYWorld . bind ( minYWorld . add ( getHeight ( ) ) ) ; }
bind to y property of entity .
