Understanding 'found_cut_on_level' in 'poon_domingos_structure'

[zhengqigao]

Thanks for the nice implementation. I am reading through the code and wonder why we need to track found_cut_on_level in poon_domingos_structure? Consider the scenario when we provide several values in delta, e.g., delta=[1,2,3]. It seems that as long as we have done a cut once corresponding some element in delta and at an axis, then we won't do any future cut and will process to the next element in the queue Q.