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Maniphest T73889

Driver Update
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.12

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: rB77d23b0bd76f
Worked: (optional)

Short description of error
Drivers not working with animation properly. If the driver set to get information from rotation object properties and paste into transformation properties.
If you put animation keys to "rotation", driver in transformation will work badly.

If the driver gets information from the object own rotation matrix and pastes into own location matrix -than in animation updaters are lagging.
animation example

If you use the same driver setup with one bone you will get the same problem

  1. create a plane
  2. in the transform panel on "Y" axis press RMB click and from popup menu select "Copy as New Driver"
  3. press RMB click on "X" axis and "Paste driver"
  4. press RMB click on "X" axis and go to the "Edit Driver"
  5. change "Type" to "Scripted Expression"
  6. add "cos(rotation_euler)" to "Expression:"
  7. Now set animation keys on the timeline for the "Y" rotation axis. Key 1 with 0 value and key 20 to 90 degrees value.
  8. Go to front view.
  9. If you see that side of the plane not sliding on Z-axis (like on exemple)- congratulation, you recreate the bug.

here is the file for tests

Driver_update_bug.blend710 KBDownload

Event Timeline

Vasil (FeralMan) created this task.Feb 16 2020, 8:22 PM
Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.Feb 17 2020, 1:05 PM
Richard Antalik (ISS) added a project: Animation & Rigging.
Bastien Montagne (mont29) closed this task as Archived.Feb 17 2020, 2:48 PM
Bastien Montagne (mont29) claimed this task.
Bastien Montagne (mont29) added a subscriber: Bastien Montagne (mont29).

Those combinations are generating dependency cycles in depsgraph, would consider those cases as not supported currently.

Dependency cycle detected:
  OBPlane.001/Parameters Component/DRIVER(location) depends on
  OBPlane.001/Transform Component/TRANSFORM_FINAL() via 'RNA Target -> Driver'
  OBPlane.001/Transform Component/TRANSFORM_CONSTRAINTS() via 'ObConstraints -> Done'
  OBPlane.001/Transform Component/TRANSFORM_PARENT() via 'ObBase-> Constraint Stack'
  OBPlane.001/Transform Component/TRANSFORM_LOCAL() via 'ObLocal -> ObParent'
  OBPlane.001/Transform Component/TRANSFORM_INIT() via 'Transform Init'
  OBPlane.001/Parameters Component/DRIVER(location) via 'Driver -> Driven Property'
Dependency cycle detected:
  OBPlane.002/Transform Component/TRANSFORM_INIT() depends on
  OBPlane.002/Parameters Component/DRIVER(location) via 'Driver -> Driven Property'
  OBPlane.002/Transform Component/TRANSFORM_FINAL() via 'RNA Target -> Driver'
  OBPlane.002/Transform Component/TRANSFORM_SIMULATION_INIT() via 'Simulation -> Final Transform'
  OBPlane.002/Transform Component/TRANSFORM_EVAL() via 'Transform Eval -> Simulation Init'
  OBPlane.002/Transform Component/TRANSFORM_PARENT() via 'Eval'
  OBPlane.002/Transform Component/TRANSFORM_LOCAL() via 'ObLocal -> ObParent'
  OBPlane.002/Transform Component/TRANSFORM_INIT() via 'Transform Init'
Detected 2 dependency cycles