(Bug?) Parented object inherits scale from bezier node. #86003

Closed
opened 2021-02-26 00:40:27 +01:00 by Vyacheslav Kobozev · 11 comments

System Information
Operating system: Windows-8.1-6.3.9600-SP0 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40

Blender Version
Broken: 2.79b — 2.93 Alpha

Short description of error
I dont see any reason, why object should inherit scale and change its position from nodes radius.
But I found this behavior in all Blender`s versions since 2.79… So I am very confused.
Is it intended?

2021-02-26_02-29-34.mp4

children scaled by bezier node.blend

**System Information** Operating system: Windows-8.1-6.3.9600-SP0 64 Bits Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.40 **Blender Version** Broken: 2.79b — 2.93 Alpha **Short description of error** I don`t see any reason, why object should inherit scale and change its position from node`s radius. But I found this behavior in all Blender`s versions since 2.79… So I am very confused. Is it intended? [2021-02-26_02-29-34.mp4](https://archive.blender.org/developer/F9840150/2021-02-26_02-29-34.mp4) [children scaled by bezier node.blend](https://archive.blender.org/developer/F9840155/children_scaled__by_bezier_node.blend)

Added subscriber: @Vyach

Added subscriber: @Vyach
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Added subscriber: @filedescriptor

Added subscriber: @filedescriptor
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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
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I can confirm this in the latest 2.93.0 Alpha, branch: master, commit date: 2021-02-26 05:59, hash: 72ceab8ab2. This seems weird that only the first handle would affect this.

I can confirm this in the latest 2.93.0 Alpha, branch: master, commit date: 2021-02-26 05:59, hash: `72ceab8ab2`. This seems weird that only the first handle would affect this.

@filedescriptor more weird, that this bug exists since 2.79b (or even earlier)
I checked all matrices (world, local, input, parent inverse) for bezier. They stand unchanged.
For child parent invers or input matrices unchanged too. Local and world matrices changed after node scaling.

@filedescriptor more weird, that this bug exists since 2.79b (or even earlier) I checked all matrices (world, local, input, parent inverse) for bezier. They stand unchanged. For child parent invers or input matrices unchanged too. Local and world matrices changed after node scaling.

Added subscriber: @mont29

Added subscriber: @mont29

Changed status from 'Confirmed' to: 'Archived'

Changed status from 'Confirmed' to: 'Archived'

No bug here. that's because by default curves have the Path Animation option enabled, so the object is parented to a point along that curve, as defined by the Evaluation Time setting, instead of being parented to the object itself (as you can see indicted by the doted parenting line in the 3DView). Just disable Path Animation to get a default normal object parenting behavior.

No bug here. that's because by default curves have the `Path Animation` option enabled, so the object is parented to a point along that curve, as defined by the `Evaluation Time` setting, instead of being parented to the object itself (as you can see indicted by the doted parenting line in the 3DView). Just disable `Path Animation` to get a default normal object parenting behavior.

@mont29 oh! Tricky!
Should it be enabled by default? Most of objects do not have path animation, so I think it should be OFF by default.
Any reason to keep it as is?

@mont29 oh! Tricky! Should it be enabled by default? Most of objects do not have path animation, so I think it should be OFF by default. Any reason to keep it as is?

Historical reasons I guess?

Historical reasons I guess?

@mont29 usability > historical in case of Blender. (as far it is not a museum :)
But i will ask animators, may be there is a reason.

BTW there is no way to stop following radius of curve as we can off rotation following…
strange approach…

@mont29 usability > historical in case of Blender. (as far it is not a museum :) But i will ask animators, may be there is a reason. BTW there is no way to stop following radius of curve as we can off rotation following… strange approach…
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Reference: blender/blender#86003
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