Add support for negative z-index in AnimationGroup #4389
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3 tasks
behackl
reviewed
Aug 11, 2025
| @@ -904,7 +931,7 @@ def get_moving_mobjects(self, *animations: Animation) -> list[Mobject]: | |||
| # as soon as there's one that needs updating of | |||
| # some kind per frame, return the list from that | |||
| # point forward. | |||
| animation_mobjects = [anim.mobject for anim in animations] | |||
| animation_mobjects = self.recursively_unpack_animation_groups(*animations) | |||
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If it works, I'd prefer a simpler solution not requiring a new method; something along the lines of the suggestion from my previous review:
Suggested change
| animation_mobjects = self.recursively_unpack_animation_groups(*animations) | |
| animation_mobjects = [] | |
| for anim in animations: | |
| animation_mobject.extend(anim.mob.get_family()) |
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Overview: What does this pull request change?
Fixes an AnimationGroup behaviour with negative z_index Mobjects. More about this problem you can see in these issues:
#3334 and #3914
Motivation and Explanation: Why and how do your changes improve the library?
Mobjects with negative z_index have problems with playing in animations. This PR fixes it
Links to added or changed documentation pages
There are no changes to the documentation
Further Information and Comments
I had already opened a pull request, but I decided to close it due to many issues with the previous solution. I have taken all the shortcomings, now there are no performance or graphical test issues.
Reviewer Checklist