Copy rotation constraint not working correctly in Blender 2.80 RC1 #67036

New Issue

Imre Varga · 2019-07-16T05:57:53+02:00

Imre Varga commented

2019-07-16 05:57:53 +02:00

Operating system: Windows 10
Graphics card: Nvidia Geforce RTX 2070 MaxQ

Broken: v 2.80 Release Candidate
Worked: v 2.79b

The copy rotation constraint behaves erratically in the viewport and doesn't work at all in final render.

open attached file in Blender 2.79
run the animation in the viewport, observe correct behaviour
render out video stream, observe correct result
open the same file without any modifications in Blender 2.80
run the animation in the viewport
observe inconsistency when using the 'jump to endpoint' buttons
hit 'render animation', observe error message
change output file format to png and hit 'render animation'
observe faulty render result

blender_2_79_bug_report_animation.blend

Operating system: Windows 10 Graphics card: Nvidia Geforce RTX 2070 MaxQ Broken: v 2.80 Release Candidate Worked: v 2.79b The copy rotation constraint behaves erratically in the viewport and doesn't work at all in final render. - open attached file in Blender 2.79 - run the animation in the viewport, observe correct behaviour - render out video stream, observe correct result - open the same file without any modifications in Blender 2.80 - run the animation in the viewport - observe inconsistency when using the 'jump to endpoint' buttons - hit 'render animation', observe error message - change output file format to png and hit 'render animation' - observe faulty render result [blender_2_79_bug_report_animation.blend](https://archive.blender.org/developer/F7612337/blender_2_79_bug_report_animation.blend)

Imre Varga commented

2019-07-16 05:57:53 +02:00

Added subscriber: @imrevarga

Chris Nicoll commented

2019-07-16 07:00:19 +02:00

Added subscriber: @clutterstack

Chris Nicoll commented

2019-07-16 07:00:19 +02:00

I can confirm weird rendering result with this file on 2.80 RC1, Antergos/Arch Linux, Intel i7 4770k, RTX 2070. In the viewport, stepping through keyframes gives the right result, but pressing the jump to endpoint buttons, or skipping a bunch of frames, seems to "catch" some bones lagging behind. In the rendered animation, the middle bones seem to be "snagged" in place and the mesh just stretches as the leading bones pass by.

Can also confirm the .blend file renders correctly in 2.79.

I can confirm weird rendering result with this file on 2.80 RC1, Antergos/Arch Linux, Intel i7 4770k, RTX 2070. In the viewport, stepping through keyframes gives the right result, but pressing the jump to endpoint buttons, or skipping a bunch of frames, seems to "catch" some bones lagging behind. In the rendered animation, the middle bones seem to be "snagged" in place and the mesh just stretches as the leading bones pass by. Can also confirm the .blend file renders correctly in 2.79.

Imre Varga commented

2019-07-17 12:24:16 +02:00

Just tried it on a i7-4810MQ / Nvidia Quadro 2000M. Same result.

Sebastian Parborg commented

2019-07-17 14:34:25 +02:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-07-17 14:34:25 +02:00

Changed status from 'Open' to: 'Archived'

Sebastian Parborg closed this issue

2019-07-17 14:34:25 +02:00

Sebastian Parborg self-assigned this 2019-07-17 14:34:25 +02:00

Sebastian Parborg commented

2019-07-17 14:34:25 +02:00

This is because you have 3 dependency cycles in that file:

Dependency cycle detected:
  OBArmature/Bone.002/POSE_IK_SOLVER() depends on
  OBArmature/Bone.002/BONE_READY() via 'IK Chain Parent'
  OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready'
  OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone'
  OBArmature/Bone.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation'
  OBArmature/Bone.002/POSE_IK_SOLVER() via 'IK Chain Result'
Dependency cycle detected:
  OBArmature/Bone.002/BONE_DONE() depends on
  OBArmature/Bone.002/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready'
  OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone'
  OBArmature/Bone.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation'
Dependency cycle detected:
  OBArmature/Bone.002/POSE_IK_SOLVER() depends on
  OBArmature/Bone.003/BONE_READY() via 'IK Solver Owner'
  OBArmature/Bone.003/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Bone.003/BONE_POSE_PARENT() via 'Pose -> Constraints Stack'
  OBArmature/Bone.002/BONE_READY() via 'Parent Bone -> Child Bone'
  OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready'
  OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone'
  OBArmature/Bone.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready'
  OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation'
  OBArmature/Bone.002/POSE_IK_SOLVER() via 'IK Chain Result'
Detected 3 dependency cycles

We do not support dependency cycles.

This is because you have 3 dependency cycles in that file: ``` Dependency cycle detected: OBArmature/Bone.002/POSE_IK_SOLVER() depends on OBArmature/Bone.002/BONE_READY() via 'IK Chain Parent' OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready' OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone' OBArmature/Bone.001/BONE_READY() via 'Ready -> Done' OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation' OBArmature/Bone.002/POSE_IK_SOLVER() via 'IK Chain Result' Dependency cycle detected: OBArmature/Bone.002/BONE_DONE() depends on OBArmature/Bone.002/BONE_READY() via 'Ready -> Done' OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready' OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone' OBArmature/Bone.001/BONE_READY() via 'Ready -> Done' OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation' Dependency cycle detected: OBArmature/Bone.002/POSE_IK_SOLVER() depends on OBArmature/Bone.003/BONE_READY() via 'IK Solver Owner' OBArmature/Bone.003/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Bone.003/BONE_POSE_PARENT() via 'Pose -> Constraints Stack' OBArmature/Bone.002/BONE_READY() via 'Parent Bone -> Child Bone' OBArmature/Bone.002/BONE_POSE_PARENT() via 'Pose -> Ready' OBArmature/Bone.001/BONE_DONE() via 'Parent Bone -> Child Bone' OBArmature/Bone.001/BONE_READY() via 'Ready -> Done' OBArmature/Bone.001/BONE_CONSTRAINTS() via 'Constraints -> Ready' OBArmature/Bone.002/BONE_DONE() via 'Copy Rotation' OBArmature/Bone.002/POSE_IK_SOLVER() via 'IK Chain Result' Detected 3 dependency cycles ``` We do not support dependency cycles.

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Copy rotation constraint not working correctly in Blender 2.80 RC1 #67036