Rigid body constraint hinge shift with animated object #85529

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opened 2021-02-10 20:04:12 +01:00 by anger · 10 comments

Operating system: windows 10
Graphics card: Nvidia gtx 1070

Blender Version
Broken: blender 2.92 today build, b67423f806 also

Short description of error: The constraint hinge is shift when combined with an animated rigid body.
in some cases this shift occurs at the beginning of the animation and other times it is at the moment of a shock with an obstacle.

Exact steps for others to reproduce the error
Put an object in rigid body connection with a hinge stress with a first object. Animate the first object.
Open the blend file,
Shift frame from current to next, see cube.001.

rigidbody_hinge.blend

Also, there's an ASan error if you open the file, shift frame to next, close file.
T85529_asan_report.txt

Operating system: windows 10 Graphics card: Nvidia gtx 1070 **Blender Version** Broken: blender 2.92 today build, b67423f80663990f972f4317d38b8e7662b9e8eb also Short description of error: The constraint hinge is shift when combined with an animated rigid body. in some cases this shift occurs at the beginning of the animation and other times it is at the moment of a shock with an obstacle. **Exact steps for others to reproduce the error** Put an object in rigid body connection with a hinge stress with a first object. Animate the first object. Open the blend file, Shift frame from current to next, see cube.001. [rigidbody_hinge.blend](https://archive.blender.org/developer/F9773043/rigidbody_hinge.blend) Also, there's an ASan error if you open the file, shift frame to next, close file. [T85529_asan_report.txt](https://archive.blender.org/developer/F10146214/T85529_asan_report.txt)
Author

Added subscriber: @jemian

Added subscriber: @jemian
Author

In fact all rigid body constraints are bugged with the same problem.

In fact all rigid body constraints are bugged with the same problem.
Author

it worked on the 2.79 . Since all constraint rigid with "animated" is broken

it worked on the 2.79 . Since all constraint rigid with "animated" is broken
Member

Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Member

Added subscriber: @ankitm

Added subscriber: @ankitm

Added subscriber: @Fernando-Alcala

Added subscriber: @Fernando-Alcala

I've come across this issue as well. Whenever you're animating a rigid body on frame 1 or before, it bugs out like that. The workaround is to not use frame 1.
2021-05-28 15-27-37.mp4

I've come across this issue as well. Whenever you're animating a rigid body on frame 1 or before, it bugs out like that. The workaround is to not use frame 1. [2021-05-28 15-27-37.mp4](https://archive.blender.org/developer/F10147029/2021-05-28_15-27-37.mp4)
Author

Yep but If you have an animation that starts in the camera field in another frame, this solution does not work.

Yep but If you have an animation that starts in the camera field in another frame, this solution does not work.

Added subscribers: @sreich, @dfelinto

Added subscribers: @sreich, @dfelinto

Thanks for the report. Marking this as known issue since it depends on the rigid body system which at the moment has no active developer. I'm tagging Sergej here anyways in case he wants to tackle any of those. Anyone wlse interested on that can also join the geometry nodes meetings to get onboarded.

Thanks for the report. Marking this as known issue since it depends on the rigid body system which at the moment has no active developer. I'm tagging Sergej here anyways in case he wants to tackle any of those. Anyone wlse interested on that can also join the geometry nodes meetings to get onboarded.
Philipp Oeser removed the
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Reference: blender/blender#85529
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