the curve basic idea or a graph about it

[machinezhou]

hi sir,
At first thank you for your great work, and I‘ve been looking for this Lollipop Recents screen layout long time ago.After reading deckview, the curve calculation is still puzzling me, do you have a graph of this curve (just like para-curve)to illustrate about the mathematic idea or how the first DeckChildView's Y relate to the second one's Y. Thanks again.