the point scanner is as same mysterious as the mecha.
since when do humans even get a glimpse of understanding about the weapons and technologie of gantz inventory?
i dont think the osaka freak was one of the most famous and genius physicist.
so there just no explaination for those 2 things. (at least not until now)
same goes for many other things in the gantz universe. so much is still unexplained. and i gave up hope getting one any time soon.