Rotating a sliced sprite around off-center Anchor behaves erratic

[lennart]

Bevy version

bevy main f0a9864

What you did

I rotated a sliced and custom sized sprite around an off-center anchor

What went wrong

I expected the sprite to be correctly scaled and rotated,
but the sliced parts leave gaps and do not seem to behave correctly. See the below screenshot:

Additional information

I just modified the sprite_slice example, you can inspect the changed example code in my fork

Am I misusing the TextureSlicer here? Should I actually be rotating something else, like a parent entity instead of the sliced sprite entity?

[lennart]

a typical use-case is an arrow sprite which I want to slice to scale its length without distorting it, but rotate it around the tip or end

[bugsweeper]

The problem is in this line caused by anchor (even without rotation), because at some moment all parts of Sprite extracts as separate extracted sprites, at this moment each of them know self size, anchor in dimensions of global sprite, but not dimensions of global sprite. That's why the smaller sprite part is, the smaller anchor impact would be. Here is result of some workaround (I changed anchor for each part of sprite from global sprite dimensions to self dimensions)

[lennart]

@bugsweeper I can confirm that my altered example works as expected against your changes in #12769