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

New Issue

AdamI · 2020-02-04T23:37:46+01:00

AdamI commented

2020-02-04 23:37:46 +01:00

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

Added subscriber: @AdamInskip

Philipp Oeser commented

2020-02-05 12:33:12 +01:00

Added subscribers: @angavrilov, @lichtwerk

Philipp Oeser commented

2020-02-05 12:33:12 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2020-02-05 12:33:12 +01:00

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

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

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

Added subscriber: @iss

Richard Antalik commented

2020-02-12 19:39:49 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Richard Antalik commented

2020-02-12 19:39:49 +01:00

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

This issue was referenced by c4def7992b

This issue was referenced by c4def7992b589aaf9f45aca04b5dcb0b760ad36e

Sebastian Parborg commented

2020-04-07 13:16:09 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Sebastian Parborg closed this issue

2020-04-07 13:16:09 +02:00

Sebastian Parborg self-assigned this 2020-04-07 13:16:09 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

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