Symmetrize Transform Constraint, Y rotational axis unexpected results. #81541

New Issue

AdamI · 2020-10-08T14:50:36+02:00

AdamI commented

2020-10-08 14:50:36 +02:00

System Information
Operating system: Windows 10
Graphics card: GTX1060

Blender Version
Broken: 2.83.7
Worked: (newest version of Blender that worked as expected)

When symmetrizing a Transformation Constraint with Y rotation axis as a source, this gets flipped when it is not necessary resulting in having to manually changing every flipped constraint in the rig.

Go into edit mode, symmetrize the bones on the right. Go into pose mode, select bone on the left with the constraint. Turn on and off the Constraint. You will see the bone rests at a different rotation. To fix manually change the constraint settings to match the bone on the right (Source Min °0, max 45°)
Based on the default startup or an attached .blend file (as simple as possible).

**System Information** Operating system: Windows 10 Graphics card: GTX1060 **Blender Version** Broken: 2.83.7 Worked: (newest version of Blender that worked as expected) **When symmetrizing a Transformation Constraint with Y rotation axis as a source, this gets flipped when it is not necessary resulting in having to manually changing every flipped constraint in the rig.** **Go into edit mode, symmetrize the bones on the right. Go into pose mode, select bone on the left with the constraint. Turn on and off the Constraint. You will see the bone rests at a different rotation. To fix manually change the constraint settings to match the bone on the right (Source Min °0, max 45°)** Based on the default startup or an attached .blend file (as simple as possible).

AdamI commented

2020-10-08 14:50:36 +02:00

Added subscriber: @AdamInskip

AdamI commented

2020-10-08 14:52:04 +02:00

This comment was removed by @AdamInskip

*This comment was removed by @AdamInskip*

AdamI commented

2020-10-08 15:18:16 +02:00

TransformConstraint.blend

[TransformConstraint.blend](https://archive.blender.org/developer/F8967852/TransformConstraint.blend)

Christoph Lendenfeld commented

2020-10-09 19:17:09 +02:00

Added subscriber: @ChrisLend

Christoph Lendenfeld commented

2020-10-09 19:17:09 +02:00

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

Christoph Lendenfeld commented

2020-10-09 19:17:09 +02:00

I can confirm this behavior.

Last working version is 2.82

When doing SHIFT+D and then CTL+M+X to mirror the bones over in edit mode it does not cause this issue

@AdamInskip
Please test old versions of Blender in the future to see if it was working there. It makes the process of finding the bug a lot easier.

Here is a quick video of it
T81541_reproduced.mp4

I can confirm this behavior. Last working version is 2.82 When doing SHIFT+D and then CTL+M+X to mirror the bones over in edit mode it does not cause this issue @AdamInskip Please test old versions of Blender in the future to see if it was working there. It makes the process of finding the bug a lot easier. Here is a quick video of it [T81541_reproduced.mp4](https://archive.blender.org/developer/F8971799/T81541_reproduced.mp4)

Sybren A. Stüvel commented

2020-10-12 15:21:36 +02:00

Added subscriber: @dr.sybren

Sybren A. Stüvel self-assigned this 2020-10-12 15:21:36 +02:00

Sybren A. Stüvel commented

2020-10-12 15:21:36 +02:00

The difference seems to be caused by the constraint parameters.

Version	source Ymin	source Ymax	dest Ymin	dest Ymax
2.82	0°	45°	0°	45°
2.83	-45°	0°	0°	45°

Changing the dest Ymin/max to -45° resp. 0° orients the bone properly again.

This was caused by ee43cf5722, it looks like updateDuplicateTransformConstraintSettings() doesn't properly remap the destination parameters. @ZedDB can you take a look at this?

The difference seems to be caused by the constraint parameters. | Version | source Ymin | source Ymax | dest Ymin | dest Ymax | |------|--|--|--|--|--| | 2.82 | 0° | 45° | 0° | 45° | | 2.83 | -45° | 0° | 0° | 45° | Changing the dest Ymin/max to -45° resp. 0° orients the bone properly again. This was caused by ee43cf5722, it looks like `updateDuplicateTransformConstraintSettings()` doesn't properly remap the destination parameters. @ZedDB can you take a look at this?

Sybren A. Stüvel commented

2020-10-12 15:33:30 +02:00

Added subscriber: @ZedDB

Sybren A. Stüvel removed their assignment 2020-10-12 15:55:31 +02:00

Sebastian Parborg commented

2020-10-29 15:53:52 +01:00

Added subscriber: @zanqdo