Object dimensions become -2bajillion when deleting keyframe with this NLA setup #90387

New Issue

Demeter Dzadik · 2021-08-02T19:21:07+02:00

Demeter Dzadik commented

2021-08-02 19:21:07 +02:00

System Information
Operating system: Linux-5.8.0-7642-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-02 15:26, hash: 77187718e4

Short description of error
It seems my animators have found a way to make objects get swallowed by the void while they were using the Animation Layers addon.
This addon masks the NLA system with a more user-friendly UI, so nobody really knows what's going on under the hood, myself included, but one thing's for sure, the animation of the rig shouldn't be affecting the object transforms of the meshes, even if the rig were to end up being scaled to 0 or translated to FLOAT_MAX, or whatever it is that happens here

Exact steps for others to reproduce the error

File: 010_0030_A_objects_into_the_void.blend
Note the NLA setup in the bottom right.
Delete the keyframes of the active action.
Enter Object mode, select one of the mesh objects in the outliner, eg. "GEO-jay_body"
Check its transforms under Sidebar->Transforms
Note there is also a "Cube" which is parented to the root bone rather than being deformed by an armature modifier. This also disappears, but instead of having dimensions of -2billion, its dimensions are 0, and are stuck that way.

I would also really appreciate steps to bring back an object once it enters this state, because I could not find any.

**System Information** Operating system: Linux-5.8.0-7642-generic-x86_64-with-glibc2.32 64 Bits Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.56 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-02 15:26, hash: `77187718e4` **Short description of error** It seems my animators have found a way to make objects get swallowed by the void while they were using the Animation Layers addon. This addon masks the NLA system with a more user-friendly UI, so nobody really knows what's going on under the hood, myself included, but one thing's for sure, the animation of the rig shouldn't be affecting the object transforms of the meshes, even if the rig were to end up being scaled to 0 or translated to FLOAT_MAX, or whatever it is that happens here **Exact steps for others to reproduce the error** - File: [010_0030_A_objects_into_the_void.blend](https://archive.blender.org/developer/F10260541/010_0030_A_objects_into_the_void.blend) - Note the NLA setup in the bottom right. - Delete the keyframes of the active action. - Enter Object mode, select one of the mesh objects in the outliner, eg. "GEO-jay_body" - Check its transforms under Sidebar->Transforms ![image.png](https://archive.blender.org/developer/F10260529/image.png) - Note there is also a "Cube" which is parented to the root bone rather than being deformed by an armature modifier. This also disappears, but instead of having dimensions of -2billion, its dimensions are 0, and are stuck that way. I would also really appreciate steps to bring back an object once it enters this state, because I could not find any.

Demeter Dzadik commented

2021-08-02 19:21:07 +02:00

Added subscriber: @Mets

Demeter Dzadik commented

2021-08-03 13:32:55 +02:00

Here is another file with perhaps more interesting repro steps:

010_0030_A_enabling_anim_curves_deletes_vertices.blend
Enable the STR-Tongue curves in the graph editor
Some parts of the tongue disappear. This can make some sense if the bones' scale becomes 0, it's sort of understandable that vertices only attached to that bone disappear fully.
Re-disable the curves in the graph editor
The disappeared vertices don't come back.

I hope this is the same issue.

Here is another file with perhaps more interesting repro steps: - [010_0030_A_enabling_anim_curves_deletes_vertices.blend](https://archive.blender.org/developer/F10262646/010_0030_A_enabling_anim_curves_deletes_vertices.blend) - Enable the STR-Tongue curves in the graph editor - Some parts of the tongue disappear. This can make some sense if the bones' scale becomes 0, it's sort of understandable that vertices only attached to that bone disappear fully. - Re-disable the curves in the graph editor - The disappeared vertices don't come back. I hope this is the same issue.

blender-admin commented

2021-08-03 13:43:24 +02:00

This issue was referenced by 0342fb5d20

This issue was referenced by 0342fb5d20cd13b495a7511ccfdfc3044d83cb04

Sybren A. Stüvel commented

2021-08-03 13:48:45 +02:00

Changed status from 'Needs Triage' to: 'Resolved'

Sybren A. Stüvel closed this issue

2021-08-03 13:48:45 +02:00

Sybren A. Stüvel self-assigned this 2021-08-03 13:48:45 +02:00

Sybren A. Stüvel commented

2021-08-03 13:55:24 +02:00

There is a lot of hidden stuff going on in F10262646, so it's really hard to figure out what's exactly being animated, and how it interacts with all the drivers, hidden geometry, hidden lattices, etc.

On the terminal there are also warnings Division by Zero in Driver: 'tanScale/inheritedScale' and Math Domain Error in Driver: 'tanScale/inheritedScale', so my bet is that these drivers are doing some funky things as well.

There is a lot of hidden stuff going on in [F10262646](https://archive.blender.org/developer/F10262646/010_0030_A_enabling_anim_curves_deletes_vertices.blend), so it's really hard to figure out what's exactly being animated, and how it interacts with all the drivers, hidden geometry, hidden lattices, etc. On the terminal there are also warnings `Division by Zero in Driver: 'tanScale/inheritedScale'` and `Math Domain Error in Driver: 'tanScale/inheritedScale'`, so my bet is that these drivers are doing some funky things as well.

Demeter Dzadik commented

2021-08-03 14:48:52 +02:00

Nevermind actually, what happens in that 2nd file sort of makes sense to me now. For some reason I thought when I disable the anim curve it should reset the pose, but that's not how that works. Whoops!

Thanks a lot for the fix! We'll see if the Animation Layers addon causes more headaches in the future. This kerfuffle got me a bit more familiar with NLA shennanigans (although I still don't fully understand what the addon is doing and why exactly) and now I won't be spooked by numbers going into -2 gazillion, it should be easier to troubleshoot things! :D

Nevermind actually, what happens in that 2nd file sort of makes sense to me now. For some reason I thought when I disable the anim curve it should reset the pose, but that's not how that works. Whoops! Thanks a lot for the fix! We'll see if the Animation Layers addon causes more headaches in the future. This kerfuffle got me a bit more familiar with NLA shennanigans (although I still don't fully understand what the addon is doing and why exactly) and now I won't be spooked by numbers going into -2 gazillion, it should be easier to troubleshoot things! :D

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Object dimensions become -2bajillion when deleting keyframe with this NLA setup #90387