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Maniphest T48841

Driver shows wrong value
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Description

System Information
Win7, Radeon HD4600

Blender Version
Broken: 2.77a

Short description of error
It seems to be visual error. After 130 frame (nearly) Driver shows incorrect value which he is copying at the moment.

Exact steps for others to reproduce the error
Set driver for X rotation to copy values from Z rotation keyframes. Z-rotation is linear extrapolated in graph editor.

driver_wrong_value.blend84 KBDownload

Event Timeline

Serge Lyatin (SergeL) created this task.Jul 13 2016, 4:59 PM
Kévin Dietrich (kevindietrich) changed the task status from Unknown Status to Archived.Jul 14 2016, 12:54 PM
Kévin Dietrich (kevindietrich) claimed this task.
Kévin Dietrich (kevindietrich) added a subscriber: Kévin Dietrich (kevindietrich).

The value is pretty much correct, it is just offset by -180, though quite obviously there is a dependency cycle here:

Dependency cycle detected:
  'Cube[Object].DRIVER(rotation_euler[0])' depends on 'Cube[Object].TRANSFORM_FINAL()' through '[Target -> Driver]'
  'Cube[Object].TRANSFORM_FINAL()' depends on 'Cube[Object].TRANSFORM_LOCAL()' through 'Object Transform'
  'Cube[Object].TRANSFORM_LOCAL()' depends on 'Cube[Object].DRIVER(rotation_euler[0])' through '[Driver -> Transform]'

Such cycles can, and do, affect the result of the dependency graph evaluation. (Also, the error only shows up every 2 frames here).

Unless the error can be reproduced without dependency issues, I'm gonna close this report, can be reopened otherwise.