Transformvalues with Constrains stays Unchanged #85984

New Issue

W.Volbers · 2021-02-25T15:05:53+01:00

W.Volbers commented

2021-02-25 15:05:53 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-25 05:34, hash: 0e1c6a29cb
Worked: (newest version of Blender that worked as expected)

Short description of error

Objects that have a contraint on other objects are not updated in the transform channel.

Exact steps for others to reproduce the error

[Based on the default startup or an attached .blend file (as simple as possible)]

Two Cubes
Cube1 rotation-constrain to Cube2 local/global-space (no difference)
select Cube1 pin the TransformPanel
move Cube2 in Z
no Rotation-Values updating

This is also in 2.83,12 update_transformchannel.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-25 05:34, hash: `0e1c6a29cb` Worked: (newest version of Blender that worked as expected) **Short description of error** Objects that have a contraint on other objects are not updated in the transform channel. **Exact steps for others to reproduce the error** [Based on the default startup or an attached .blend file (as simple as possible)] Two Cubes Cube1 rotation-constrain to Cube2 local/global-space (no difference) select Cube1 pin the TransformPanel move Cube2 in Z no Rotation-Values updating **This is also in 2.83,12** [update_transformchannel.blend](https://archive.blender.org/developer/F9838646/update_transformchannel.blend) ![missing_values02.JPG](https://archive.blender.org/developer/F9838687/missing_values02.JPG)

W.Volbers commented

2021-02-25 15:05:53 +01:00

Added subscriber: @walt-3

Falk David commented

2021-02-25 15:40:43 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-02-25 15:40:43 +01:00

I don't think this is a bug. The rotation values are constrained, but not applied to the object. If you toggle the visibility of the constraint, you'll see that the cube has a rotation of 0,0,0.

W.Volbers commented

2021-02-25 16:41:29 +01:00

hmm!,

only for understanding,
what is the logic behind it,
not to display a value when it changes?!

If the value is not updated and I have for example a third cube(cube3) that is related to the one that has a constraint(cube2) it will be rotated even though it is at zero value if it has for example a rotationconstraint.

update_transformchannel02.blend

I as a "user" have only seen that the value does not change!
and now had no idea how I can determine this value,
That it works in the Driversetup, you do not expect.
Okay! Next time already : )

So it is rather a suggestion for improvement ?

hmm!, only for understanding, what is the logic behind it, not to display a value when it changes?! If the value is not updated and I have for example a third cube(cube3) that is related to the one that has a constraint(cube2) it will be rotated even though it is at zero value if it has for example a rotationconstraint. [update_transformchannel02.blend](https://archive.blender.org/developer/F9838923/update_transformchannel02.blend) ![Values02.JPG](https://archive.blender.org/developer/F9838926/Values02.JPG) I as a "user" have only seen that the value does not change! and now had no idea how I can determine this value, That it works in the Driversetup, you do not expect. Okay! Next time already : ) So it is rather a suggestion for improvement ?

Todor Nikolov commented

2021-02-26 01:13:41 +01:00

Added subscriber: @TodorNikolov

Todor Nikolov commented

2021-02-26 01:13:41 +01:00

I have also found this confusing in the past.
I understand the logic that their true unconstrained value is displayed.
Yet the "constrained values" can be used in Drivers and such. It would be nice to have an easy way to know these values.

I have also found this confusing in the past. I understand the logic that their true unconstrained value is displayed. Yet the "constrained values" can be used in Drivers and such. It would be nice to have an easy way to know these values.

Philipp Oeser commented

2021-03-10 10:35:21 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-03-10 10:35:21 +01:00

I'd say this is working by design atm.

I am a bit unsure how to classify though, leaning towards calling this as working as intended.
One possible solution (and this is clearly outside the scope of this bug tracker) might be to display constrained values in a fashion similar to driven(purple) values or animated(green) values with their own color.

But: as I said this will not be considered a bug, will quickly try to gather feedback from the animation module regarding this.

I'd say this is working by design atm. I am a bit unsure how to classify though, leaning towards calling this as working as intended. One possible solution (and this is clearly outside the scope of this bug tracker) might be to display `constrained` values in a fashion similar to `driven`(purple) values or `animated`(green) values with their own color. But: as I said this will not be considered a bug, will quickly try to gather feedback from the animation module regarding this.

Philipp Oeser commented

2021-03-10 14:07:35 +01:00

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

Philipp Oeser closed this issue

2021-03-10 14:07:35 +01:00

Philipp Oeser commented

2021-03-10 14:07:35 +01:00

Havent had an answer yet, but if this happens, will drop a note here.

That being said, will have to close since this is not a bug

For user requests and feedback, please use other channels: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests
For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug

Havent had an answer yet, but if this happens, will drop a note here. That being said, will have to close since this is not a bug ``` For user requests and feedback, please use other channels: https://wiki.blender.org/wiki/Communication/Contact#User_Feedback_and_Requests For more information on why this isn't considered a bug, visit: https://wiki.blender.org/wiki/Reference/Not_a_bug ```

Sybren A. Stüvel commented

2021-03-11 10:05:54 +01:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2021-03-11 10:05:54 +01:00

Yup, this is working as intended. What is shown in the UI is the input for the constraint system, and not the output.

Philipp Oeser commented

2021-03-11 10:51:46 +01:00

Just an idea: since it might be tricky UI-wise to display evaluated transforms and have access to the original values at the same time in the same UI, it might make sense to provide evaluated values in the new spreadsheet editor at some point.
(the spreadsheet edtor also displays evaluated vertex positions after modifiers for example)

@dr.sybren noted that he has an Addon for this (providing a UI to display the evaluated decomposed [into loc/rot/scale] object matrix):
https://github.com/sybrenstuvel/random-blender-addons/blob/main/transform_helper.py
(just know that is a community add-on without any guarantees or official support though)

Just an idea: since it might be tricky UI-wise to display evaluated transforms and have access to the original values at the same time in the same UI, it might make sense to provide evaluated values in the new spreadsheet editor at some point. (the spreadsheet edtor also displays evaluated vertex positions after modifiers for example) @dr.sybren noted that he has an Addon for this (providing a UI to display the evaluated decomposed [into loc/rot/scale] object matrix): https://github.com/sybrenstuvel/random-blender-addons/blob/main/transform_helper.py (just know that is a community add-on without any guarantees or official support though)

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Transformvalues with Constrains stays Unchanged #85984