KvadrantTurnstileFeather

A list arriving one row at a time, all of them swinging on the same axis.

This is the effect people remember and the one reimplementations get wrong, always the same way: they rotate each row about its own centre, which looks like a stack of cards flipping. The original rotates every row about one axis running down the screen — the toolkit puts the centre of rotation at -0.2 of each element's width, off to the left of all of them — so the list opens like a venetian blind rather than a deck.

Rows enter 40 ms apart and leave 50 ms apart. Both numbers are the toolkit's.