Changing the Driver while Auto Keying is on, causes new Keys on it's F-Curve #95866

New Issue

Konstantins Visnevskis · 2022-02-18T10:59:20+01:00

2022-02-18 10:59:20 +01:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.39

Blender Version
Broken: version: 3.0.1, branch: master, commit date: 2022-01-25 17:19, hash: dc2d180181

Short description of error
Changing driver's expression to produce different result, while Auto Keying is on causes creation of Keyframes on Driver's F-Curve.
While thechnically explainable, unfortunately, a scenario where this wouldn't be harmful (and quite possibly unnoticed) is unlikely.

Exact steps for others to reproduce the error
driver-fcurve-keyframe1.blend

Click on the purple/driven number field of "Curve Out X" in the Properties Editor Bendy Bones panel (dont do this in the Drivers editor, needs to be on the field directly)
change "max(x,0)*0.05" to "max(x,0)*0.05+2"
The changed value of the Driver generated a new Keyframe in the driver's F-Curve (seen in Drivers Editor below)

(works fine [without adding a keyframe] when changing the expression in the Drivers Editor)

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.39 **Blender Version** Broken: version: 3.0.1, branch: master, commit date: 2022-01-25 17:19, hash: `dc2d180181` **Short description of error** Changing driver's expression to produce different result, while Auto Keying is on causes creation of Keyframes on Driver's F-Curve. While thechnically explainable, unfortunately, a scenario where this wouldn't be harmful (and quite possibly unnoticed) is unlikely. **Exact steps for others to reproduce the error** [driver-fcurve-keyframe1.blend](https://archive.blender.org/developer/F12872819/driver-fcurve-keyframe1.blend) - Click on the purple/driven number field of "Curve Out X" in the Properties Editor Bendy Bones panel (dont do this in the Drivers editor, needs to be on the field directly) - change "max(x,0)*0.05" to "max(x,0)*0.05+2" - > The changed value of the Driver generated a new Keyframe in the driver's F-Curve (seen in Drivers Editor below) (works fine [without adding a keyframe] when changing the expression in the Drivers Editor)

Konstantins Visnevskis commented

2022-02-18 10:59:20 +01:00

Added subscriber: @KonstantinsVisnevskis

blender-admin commented

2022-02-18 10:59:20 +01:00

#102648 was marked as duplicate of this issue

Konstantins Visnevskis changed title from ~~Changing the Driver while Auto Keying is on, causes new Keys on it's F-curve~~ to Changing the Driver while Auto Keying is on, causes new Keys on it's F-Curve

2022-02-18 11:00:08 +01:00

Philipp Oeser commented

2022-02-18 15:02:44 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-02-18 15:02:44 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2022-02-18 15:02:44 +01:00

Cannot reproduce this.
I see the indicator [showing the resulting driver value] change, but I dont see a keyframe on the driver curve.
Can you show this in action?

Cannot reproduce this. I see the indicator [showing the resulting driver value] change, but I dont see a keyframe on the driver curve. Can you show this in action?

Konstantins Visnevskis commented

2022-02-18 15:15:59 +01:00

Image above - changing driver script value. Below - new keyframe on the curve right after pressing enter.

Image above - changing driver script value. Below - new keyframe on the curve right after pressing enter. ![screen.jpg](https://archive.blender.org/developer/F12873403/screen.jpg)

Philipp Oeser commented

2022-02-18 15:26:19 +01:00

Changed status from 'Needs User Info' to: 'Confirmed'

Philipp Oeser commented

2022-02-18 15:26:19 +01:00

Ah, get it now (I was doing it in the Drivers Editor -- where changing the expression works without adding the keyframe)

Sybren A. Stüvel commented

2022-03-07 12:33:43 +01:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2022-03-07 12:33:43 +01:00

I've added this to the list of problems with the auto-keying system. It's one of many, and I'm pondering on a blog post to publicly discuss changes in the auto-keying system.

I've added this to the [list of problems with the auto-keying system](https://wiki.blender.org/wiki/Modules/Animation-Rigging/Weak_Areas#Auto-keying). It's one of many, and I'm pondering on a blog post to publicly discuss changes in the auto-keying system.

Omar Emara commented

2022-11-21 08:54:40 +01:00

Added subscriber: @Forian-Naki

Philipp Oeser removed the

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Changing the Driver while Auto Keying is on, causes new Keys on it's F-Curve #95866