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Pose options - Auto IK. Bones move on release #73598

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opened 2020-02-04 23:37:46 +01:00 by AdamI · 11 comments
AdamI commented 2020-02-04 23:37:46 +01:00
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System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: 26bd5ebd42

Short description of error
When posing bones with auto IK enabled the bones re position on mouse button release if bones are scaled in the chain.

Exact steps for others to reproduce the error
Open file, grab the end bone on the left armature chain, move and release. Repeat on right armature chain and behaves as expected. AutoIK_Example.blend

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00 **Blender Version** Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: `26bd5ebd42` **Short description of error** When posing bones with auto IK enabled the bones re position on mouse button release if bones are scaled in the chain. **Exact steps for others to reproduce the error** Open file, grab the end bone on the left armature chain, move and release. Repeat on right armature chain and behaves as expected. [AutoIK_Example.blend](https://archive.blender.org/developer/F8321814/AutoIK_Example.blend)
AdamI commented 2020-02-04 23:37:46 +01:00
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Added subscriber: @AdamInskip

Added subscriber: @AdamInskip
Philipp Oeser commented 2020-02-05 12:33:12 +01:00
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Added subscribers: @angavrilov, @lichtwerk

Added subscribers: @angavrilov, @lichtwerk
Philipp Oeser commented 2020-02-05 12:33:12 +01:00
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Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
Philipp Oeser commented 2020-02-05 12:33:12 +01:00
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Can confirm the behavior described.
Not too familiar with rigging, not sure this should be supported even.
Cannot confirm that 2.79 was working here (if I paste the armature into 2.79, I am getting the same offsets there)

In a Debug build, I am getting following assert on release:

BLI_assert failed: /blender/source/blender/blenkernel/intern/armature.c:2133, BKE_pchan_mat3_to_rot(), at '!(fabsf(_test_unit - 1.0f) >= 0.0002f) || !(fabsf(_test_unit) >= 0.0002f)'

@angavrilov : you are familiar with this?

Can confirm the behavior described. Not too familiar with rigging, not sure this should be supported even. Cannot confirm that 2.79 was working here (if I paste the armature into 2.79, I am getting the same offsets there) In a Debug build, I am getting following assert on release: ``` BLI_assert failed: /blender/source/blender/blenkernel/intern/armature.c:2133, BKE_pchan_mat3_to_rot(), at '!(fabsf(_test_unit - 1.0f) >= 0.0002f) || !(fabsf(_test_unit) >= 0.0002f)' ``` @angavrilov : you are familiar with this?
AdamI commented 2020-02-05 16:27:41 +01:00
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Thanks Phillip
Attached same simple setup in 2.79 you'll see it works as expected. AutoIK_Example_2.79.blend

Thanks Phillip Attached same simple setup in 2.79 you'll see it works as expected. [AutoIK_Example_2.79.blend](https://archive.blender.org/developer/F8323586/AutoIK_Example_2.79.blend)
AdamI commented 2020-02-05 16:35:14 +01:00
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I should mention inherit scale is set to none for what would be the forearm and palm in a rig.

I should mention inherit scale is set to none for what would be the forearm and palm in a rig.
Richard Antalik commented 2020-02-12 19:39:49 +01:00
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Added subscriber: @iss

Added subscriber: @iss
Richard Antalik commented 2020-02-12 19:39:49 +01:00
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Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'
Richard Antalik commented 2020-02-12 19:39:49 +01:00
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Can confirm different behavior to 2.79 with file AutoIK_Example_2.79.blend

Can confirm different behavior to 2.79 with file [AutoIK_Example_2.79.blend](https://archive.blender.org/developer/F8323586/AutoIK_Example_2.79.blend)
blender-admin commented 2020-04-07 13:12:14 +02:00
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This issue was referenced by c4def7992b

This issue was referenced by c4def7992b589aaf9f45aca04b5dcb0b760ad36e
Sebastian Parborg commented 2020-04-07 13:16:09 +02:00
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Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
Sebastian Parborg self-assigned this 2020-04-07 13:16:09 +02:00
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Reference: blender/blender#73598
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