'Limit Location' constraint does not work when added via script #119945

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opened 2024-03-27 02:07:20 +01:00 by Adam Earle · 4 comments

Adam Earle commented

2024-03-27 02:07:20 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.42

Blender Version
Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: 40a5e739e270
Worked: (newest version of Blender that worked as expected)

Short description of error
Python script fails to "completely enable" limit location constraint.

Exact steps for others to reproduce the error

Open attached .blend file
Delete the Limit Location constraint
Run script

After the script is run the user then needs to Alt+G to reset the object back to 0 manually. Clear Deltas must be checked. Only then will the limit location constraint work as intended.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.42 **Blender Version** Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: `40a5e739e270` Worked: (newest version of Blender that worked as expected) **Short description of error** Python script fails to "completely enable" limit location constraint. ![](https://projects.blender.org/attachments/6e27270f-8f8a-4292-93b3-e88e2cf44945) <video src="/attachments/c1738f00-475d-4bc1-99d4-265073714303" controls></video> **Exact steps for others to reproduce the error** - Open attached .blend file - Delete the `Limit Location` constraint - Run script After the script is run the user then needs to Alt+G to reset the object back to 0 manually. Clear Deltas must be checked. Only then will the limit location constraint work as intended.

Limit Location Constraint Report.mp4

5.4 MiB

Limit Location.blend

668 KiB

blender_HM7TZFjekN.png

3.4 KiB

Adam Earle added the

labels 2024-03-27 02:07:20 +01:00

Germano Cavalcante added

Animation & Rigging

and removed

labels 2024-03-27 03:23:55 +01:00

Germano Cavalcante changed title from ~~Limit Location script not fully applied~~ to 'Limit Location' constraint does not work when added via script

2024-03-27 03:27:18 +01:00

Germano Cavalcante commented

2024-03-27 03:28:08 +01:00

Member

I can confirm the issue. Thank you for reporting it. I will forward this bug report to the developers for further investigation.

I can confirm the issue. Thank you for reporting it. I will forward this bug report to the developers for further investigation.

YimingWu commented

2024-03-27 07:59:12 +01:00

Member

This seems to be somewhat related to keyframe/animation system.

If you do such step, the script-added constraint will be effective:

Open attached file on the post.
Delete that location key frame.
Delete the existing constraint.
Run script.
Constraint works.

This seems to be somewhat related to keyframe/animation system. If you do such step, the script-added constraint will be effective: - Open attached file on the post. - Delete that location key frame. - Delete the existing constraint. - Run script. - Constraint works.

Adam Earle commented

2024-03-28 03:18:52 +01:00

Author

This seems to be somewhat related to keyframe/animation system.

If you do such step, the script-added constraint will be effective:

Open attached file on the post.

Delete that location key frame.

Delete the existing constraint.

Run script.

Constraint works.

Your current well-spotted.

With auto key turned on shouldn't this update the current keyframe? or even more so add another key since the actual object will move? not to sure what would be the right behavior. Perhaps leave as is and close?

> This seems to be somewhat related to keyframe/animation system. > > If you do such step, the script-added constraint will be effective: > > - Open attached file on the post. > - Delete that location key frame. > - Delete the existing constraint. > - Run script. > - Constraint works. Your current well-spotted. With auto key turned on shouldn't this update the current keyframe? or even more so add another key since the actual object will move? not to sure what would be the right behavior. Perhaps leave as is and close?

YimingWu commented

2024-03-28 03:46:23 +01:00

Member

No I think the current behaviour is still wrong, at least when the constraint is in place the object should not move outside the specified range.

No I think the current behaviour is still wrong, at least when the constraint is in place the object should not move outside the specified range.

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Reference: blender/blender#119945

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