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Constraint with custom space not limiting transformation #111663

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opened 2023-08-29 17:46:53 +02:00 by Seifolio · 8 comments
Seifolio commented 2023-08-29 17:46:53 +02:00
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System Information
Operating system: Windows 11
Graphics card: RTX 3060

Broken: Blender 3.6.2
Worked: Never

Affect transform conflict with custom space

According to documentation, Affect Transform option will limit manual rotation, but it doesn't with custom space. It works with local space.

Steps To Reproduce

Open file and rotate contrained bone. Check bone transformaton - it is not limited.

**System Information** Operating system: Windows 11 Graphics card: RTX 3060 Broken: Blender 3.6.2 Worked: Never Affect transform conflict with custom space According to documentation, Affect Transform option will limit manual rotation, but it doesn't with custom space. It works with local space. **Steps To Reproduce** Open [file](https://projects.blender.org/attachments/12bb976b-abb1-407e-a17e-ac54cf58e141) and rotate contrained bone. Check bone transformaton - it is not limited.
AstraZeneca Naked Eye 2.724.blend
48 MiB
Seifolio added the
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 labels 2023-08-29 17:46:54 +02:00
Seifolio changed title from Affect transform Issue to Affect Transform Issue 2023-08-29 17:47:28 +02:00
Iliya Katushenock commented 2023-08-29 18:05:18 +02:00
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Dependency cycle detected:
  OBArmature/Robo.Arm.MCH.001/POSE_IK_SOLVER() depends on
  OBArmature/Robo.Arm.IK.CTRL.001/BONE_DONE() via 'IK'
  OBArmature/Robo.Arm.IK.CTRL.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Robo.Arm.IK.CTRL.001/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Robo.Arm.CTRL.001/BONE_DONE() via 'Copy Transforms'
  OBArmature/Robo.Arm.CTRL.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Robo.Arm.CTRL.001/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Robo.Arm.MCH.003/BONE_DONE() via 'Limit Rotation'
  OBArmature/Robo.Arm.MCH.001/POSE_IK_SOLVER() via 'IK Solver Result'

Thanks for report. You file contains dependency cycle. So this can cause undefined behavior.
Can you fix this can confirm that bug is fixed too?

``` Dependency cycle detected: OBArmature/Robo.Arm.MCH.001/POSE_IK_SOLVER() depends on OBArmature/Robo.Arm.IK.CTRL.001/BONE_DONE() via 'IK' OBArmature/Robo.Arm.IK.CTRL.001/BONE_READY() via 'Ready -> Done' OBArmature/Robo.Arm.IK.CTRL.001/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Robo.Arm.CTRL.001/BONE_DONE() via 'Copy Transforms' OBArmature/Robo.Arm.CTRL.001/BONE_READY() via 'Ready -> Done' OBArmature/Robo.Arm.CTRL.001/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Robo.Arm.MCH.003/BONE_DONE() via 'Limit Rotation' OBArmature/Robo.Arm.MCH.001/POSE_IK_SOLVER() via 'IK Solver Result' ``` Thanks for report. You file contains dependency cycle. So this can cause undefined behavior. Can you fix this can confirm that bug is fixed too?
Seifolio commented 2023-08-30 12:10:11 +02:00
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Hello,
Thank you for the fast response. Here I made a simpler armature with two bones (Bone A) and (Bone B) no relationship between them.
you can rotate (Bone B) which has the Limit Rotation Constraint based on custom space of (Bone A) and (Affect Transform) is on. All is working good except (Affect Transform) you can find that the bone rotation exceeds the limit (not visually but in the transformation data)

Hello, Thank you for the fast response. Here I made a simpler armature with two bones (Bone A) and (Bone B) no relationship between them. you can rotate (Bone B) which has the Limit Rotation Constraint based on custom space of (Bone A) and (Affect Transform) is on. All is working good except (Affect Transform) you can find that the bone rotation exceeds the limit (not visually but in the transformation data)
Screenshot Affect Transform.png
536 KiB
Affect Transform 1.0.blend
890 KiB
Screenshot Affect Transform.png
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Iliya Katushenock commented 2023-08-30 13:38:03 +02:00
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This is original transform data. All you see are evaluated versions of objects in its transforms. It's like modifiers that make very detailed meshes. You can see them, but their original data will be different. So it's not a bug, just the way blender works.

This is original transform data. All you see are evaluated versions of objects in its transforms. It's like modifiers that make very detailed meshes. You can see them, but their original data will be different. So it's not a bug, just the way blender works.
Philipp Oeser commented 2023-08-30 14:13:23 +02:00
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Thx reporting! Agree this is not a bug though, the original values are still there (just limited by the constraint), if you disable the constraint, those original values take affect.

So unless this is a misunderstanding (in which case feel free to comment again), will close this report.

Thx reporting! Agree this is not a bug though, the original values are still there (just limited by the constraint), if you disable the constraint, those original values take affect. So unless this is a misunderstanding (in which case feel free to comment again), will close this report.
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Seifolio commented 2023-08-30 16:43:14 +02:00
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What I understand now is that (Affect Transform) doesn't work for custom space please tell me if I am wrong
Here another try with the local space:

(Image 1) with (Affect Transform) is on --> The original values didn't go beyond the limits
(Image 2) with (Affect Transform) is off --> The original values go beyond the limits

What I understand now is that (Affect Transform) doesn't work for custom space *please tell me if I am wrong* Here another try with the local space: (Image 1) with (Affect Transform) is on --> The original values didn't go beyond the limits (Image 2) with (Affect Transform) is off --> The original values go beyond the limits
1.png
563 KiB
2.png
570 KiB
1.png 2.png
Philipp Oeser commented 2023-08-30 17:14:21 +02:00
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Will recheck later

Will recheck later
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Richard Antalik commented 2023-09-01 03:36:55 +02:00
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Just from documentation, this seems like a bug, but looking at code it seems to be not implemented:

        /* Skip incompatible space-types. */
        if (!ELEM(con->ownspace, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL)) {
          continue;
        }

This is quite old piece of code, so not sure who could tell more information. In any case will confirm and let module decide whether this is undocumented known issue or bug.

Just from documentation, this seems like a bug, but looking at code it seems to be not implemented: ``` /* Skip incompatible space-types. */ if (!ELEM(con->ownspace, CONSTRAINT_SPACE_WORLD, CONSTRAINT_SPACE_LOCAL)) { continue; } ``` This is quite old piece of code, so not sure who could tell more information. In any case will confirm and let module decide whether this is undocumented known issue or bug.
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Richard Antalik changed title from Affect Transform Issue to Constraint with custom space not limiting transformation 2023-09-01 03:38:03 +02:00
Christoph Lendenfeld added
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Christoph Lendenfeld commented 2023-10-10 11:11:57 +02:00
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putting this as a known issue since I went through the code and custom space seems to be not implemented for affect transform

putting this as a known issue since I went through the code and custom space seems to be not implemented for affect transform
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Reference: blender/blender#111663
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