How does an automatic transmission's one way clutch/clutches work?

General Discussion
3

I know how it works, about the oblong bearing idea and all that, but I don’t know exactly what it’s supposed to do, or where it is. Like I said, I know how the clutch packs and the bands work and how they are actuated and how it shifts the transmission, but the one way clutch is what gets me. I don’t know what it’s supposed to do and where it’s supposed to be, I watched a video on it a little while ago and it sort of scrambled my brain because the guy explaining it had a 2d block graph, which is VERY hard to understand when you have basically no context where the parts are. I don’t understand how a reverse gear would work with a one way clutch.