Bone Override Transform affects bone local axis display. #102948

New Issue

Konstantins Visnevskis · 2022-12-05T14:04:28+01:00

2022-12-05 14:04:28 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 522.30

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce

Short description of error
When a bone gets assigned a display transform override, it's viewport display axis gets transformed, which probably shouldn't happen as its purpose is to display the Bone's not it's Shape's local axes.

Exact steps for others to reproduce the error
override-transform.blend

Remove Override Transform from Bone's Viewport Display's Custom Shape -> Displayed Bone's axes change location.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 522.30 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: `0759f671ce` **Short description of error** When a bone gets assigned a display transform override, it's viewport display axis gets transformed, which probably shouldn't happen as its purpose is to display the Bone's not it's Shape's local axes. **Exact steps for others to reproduce the error** [override-transform.blend](https://archive.blender.org/developer/F13996673/override-transform.blend) - Remove Override Transform from Bone's Viewport Display's Custom Shape -> Displayed Bone's axes change location.

Konstantins Visnevskis commented

2022-12-05 14:04:28 +01:00

Added subscriber: @KonstantinsVisnevskis

Germano Cavalcante commented

2022-12-05 21:41:33 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-12-05 21:41:33 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2022-12-05 21:41:33 +01:00

I'm having trouble understanding the problem.
What should the expected result be?

I tested it on 2.79 and the behavior is the same, so it works like this for a long time:
override-transform_279.blend

I'm having trouble understanding the problem. What should the expected result be? I tested it on 2.79 and the behavior is the same, so it works like this for a long time: [override-transform_279.blend](https://archive.blender.org/developer/F13998636/override-transform_279.blend)

Konstantins Visnevskis commented

2022-12-06 01:22:33 +01:00

The point of having axes displayed is to see the origins and (most often) see the Roll of the Bones. Having Bone axes indicator transformed by Custom Shape nullifies that while serving no other purpose (afaik) as there is no need to know where the origin of a visibility shape is located. Furthermore it may lead to mistakes on actual roll, if the behavior is not known to the user. I suspect this wasn't reported because Roll is usually aligned earlier than assigning Bone Shapes, as well as Bone Shape Transform Override being mostly used in rather specific cases, like hierarchy problems or script generated rigs.
The expected behavior is for the Bone axes indicator to remain where it is when there is no Custom Shape Transform.

The point of having axes displayed is to see the origins and (most often) see the Roll of the Bones. Having Bone axes indicator transformed by Custom Shape nullifies that while serving no other purpose (afaik) as there is no need to know where the origin of a visibility shape is located. Furthermore it may lead to mistakes on actual roll, if the behavior is not known to the user. I suspect this wasn't reported because Roll is usually aligned earlier than assigning Bone Shapes, as well as Bone Shape Transform Override being mostly used in rather specific cases, like hierarchy problems or script generated rigs. The expected behavior is for the Bone axes indicator to remain where it is when there is no Custom Shape Transform.

Germano Cavalcante commented

2022-12-06 14:38:53 +01:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Germano Cavalcante commented

2022-12-06 14:38:53 +01:00

So you're saying that the axis should be in the region indicated in red in the image bellow?

I'm not sure if this is really the case and really a bug.

So you're saying that the axis should be in the region indicated in red in the image bellow? ![image.png](https://archive.blender.org/developer/F14001017/image.png) I'm not sure if this is really the case and really a bug.

Konstantins Visnevskis commented

2022-12-06 15:23:42 +01:00

Well, the logic of me thinking it is a bug is in assumption, that the primary goal of the indicator is to display Bone Roll. Which in turn is based on:

seeing Bone Roll being a basic, core functionality for rigging, and no other practical way of seeing Roll being there.
not knowing any other purpose of the indicator.
I hope it's just that my knowledge is incomplete, but I do have considerable experience in rigging :)

Well, the logic of me thinking it is a bug is in assumption, that the primary goal of the indicator is to display Bone Roll. Which in turn is based on: - seeing Bone Roll being a basic, core functionality for rigging, and no other practical way of seeing Roll being there. - not knowing any other purpose of the indicator. I hope it's just that my knowledge is incomplete, but I do have considerable experience in rigging :)

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Bone Override Transform affects bone local axis display. #102948