Symmetrizing armature does not symmetrize constraints #88076

New Issue

MattCROK · 2021-05-06T14:37:43+02:00

MattCROK commented

2021-05-06 14:37:43 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27

Blender Version
Broken: - version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab
- version 2.93 Beta

Short description of error
I try to constrain bones from an armature to bones from a rigify rig. Both armatures are in the world origin.
I start by constraining the bones of the left arms and legs of the rig, then I symmetrize these and once it's symmetrized, I notice that the right arms and legs are constrained to the left arms and legs of the Rigify rig.

Exact steps for others to reproduce the error
Create a rigify rig, then another rig, make the constraints on the bones and symmetrize.

PS:

It's not just because of Rigify, I also tested with another Rig.
It's not because of add-ons: I also tried to do it after I reloaded the factory settings.

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27 **Blender Version** Broken: - version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab` - version 2.93 Beta **Short description of error** I try to constrain bones from an armature to bones from a rigify rig. Both armatures are in the world origin. I start by constraining the bones of the left arms and legs of the rig, then I symmetrize these and once it's symmetrized, I notice that the right arms and legs are constrained to the left arms and legs of the Rigify rig. **Exact steps for others to reproduce the error** Create a rigify rig, then another rig, make the constraints on the bones and symmetrize. PS: - It's not just because of Rigify, I also tested with another Rig. - It's not because of add-ons: I also tried to do it after I reloaded the factory settings.

MattCROK commented

2021-05-06 14:37:43 +02:00

Added subscriber: @MattCROK

Philipp Oeser commented

2021-05-06 15:51:40 +02:00

Added subscribers: @ZedDB, @lichtwerk

Philipp Oeser commented

2021-05-06 15:51:40 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2021-05-06 15:51:40 +02:00

Afaics, this is working with bones in the same rig, see

#88076.blend

So the issue is that we might have the case where we are constrained to an existing bone in a separate armature (and the mirrored subtarget bone in that separate armature would actually already exist -- of course we would not want to create one in that separate armature).
This then does not work, true. subtarget stays "un-mirrored".

T88076_b.blend

This seems to be intended though, code in updateDuplicateSubtarget checks if this happens in the same armature.
Dont think this is a bug, quick confirmation from @ZedDB would help.

Afaics, this is working with bones in the same rig, see [#88076.blend](https://archive.blender.org/developer/F10056461/T88076.blend) So the issue is that we might have the case where we are constrained to an existing bone in a **separate** armature (and the mirrored subtarget bone in that separate armature would actually already exist -- of course we would not want to create one in that separate armature). This then does not work, true. subtarget stays "un-mirrored". [T88076_b.blend](https://archive.blender.org/developer/F10056485/T88076_b.blend) This seems to be intended though, code in `updateDuplicateSubtarget` checks if this happens in the **same** armature. Dont think this is a bug, quick confirmation from @ZedDB would help.

Sebastian Parborg commented

2021-05-06 16:04:27 +02:00

As Philipp pointed out, the operator is not programmed to handle this. So it is not a bug per se.

However it sound useful to be able to do something like this, so I'll mark this as a "Known Issue".
Also marking it as such as I don't think me or any of the other core devs will have time to work on this in the coming months.

If anyone else wants to work on this, feel free do to do so :)

As Philipp pointed out, the operator is not programmed to handle this. So it is not a bug per se. However it sound useful to be able to do something like this, so I'll mark this as a "Known Issue". Also marking it as such as I don't think me or any of the other core devs will have time to work on this in the coming months. If anyone else wants to work on this, feel free do to do so :)

MattCROK commented

2021-05-06 16:41:54 +02:00

Indeed, you're right. It's an issue only for constraints from bones from an armature to bones of another armature. I tried and it works in the same armature.
I didn't know it wasn't a bug. ^^'

But indeed, I confirm you it would be really useful to be able to symmetrize the constraints as well in that condition.

Thank's.

Indeed, you're right. It's an issue only for constraints from bones from an armature to bones of another armature. I tried and it works in the same armature. I didn't know it wasn't a bug. ^^' But indeed, I confirm you it would be really useful to be able to symmetrize the constraints as well in that condition. Thank's.

Philipp Oeser commented

2021-05-06 17:03:57 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Philipp Oeser commented

2021-05-06 17:03:57 +02:00

Since status has been clarified by @ZedDB we dont need any more information from developers, setting to "confirmed".

Kevin Curry commented

2022-06-23 12:51:50 +02:00

Added subscriber: @KevinCurry_Unity

Philipp Oeser removed the

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Symmetrizing armature does not symmetrize constraints #88076