Regression: Mirror Vertex Weights gives unpredictable results #101773

New Issue

Keith Boshoff · 2022-10-12T14:37:43+02:00

Keith Boshoff commented

2022-10-12 14:37:43 +02:00

Simplified Report

Execute Weights > Mirror on the vertex group in the attached file.
Notice how it corrupt somehow.

vertexGroupMirror.blend

Before Mirror:

After Mirror:

Caused by: 05952aa94d

Original Report

System Information
Operating system: Windows 10
Graphics card: NVidia GTX 960

Blender Version
Broken: 3.4+
Worked: 3.3

When mirroring vertex groups in the Weight Editor it gives results that are nearly random, even ignoring selection.

Exact steps for others to reproduce the error

Open the attached scene (see below)
Enter Weight mode
Execute the Mirror Operator: Weights > Mirror
Check All Groups in operator parameters
My results are practically random despite perfect symmetry in the mesh. (I also have more complex meshes crash Blender when mirroring vertices in 3.4)

MirrorWeightsTest.blend1

## Simplified Report - Execute Weights > Mirror on the vertex group in the attached file. - Notice how it corrupt somehow. [vertexGroupMirror.blend](https://archive.blender.org/developer/F13667208/vertexGroupMirror.blend) Before Mirror: ![20221012-150031.png](https://archive.blender.org/developer/F13667203/20221012-150031.png) After Mirror: ![20221012-150050.png](https://archive.blender.org/developer/F13667204/20221012-150050.png) Caused by: 05952aa94d33eeb504fa63618ba35c2bcc8bd19b ## Original Report **System Information** Operating system: Windows 10 Graphics card: NVidia GTX 960 **Blender Version** Broken: 3.4+ Worked: 3.3 When mirroring vertex groups in the Weight Editor it gives results that are nearly random, even ignoring selection. **Exact steps for others to reproduce the error** - Open the attached scene (see below) - Enter Weight mode - Execute the Mirror Operator: Weights > Mirror - Check All Groups in operator parameters - My results are practically random despite perfect symmetry in the mesh. (I also have more complex meshes crash Blender when mirroring vertices in 3.4) [MirrorWeightsTest.blend1](https://archive.blender.org/developer/F13667007/MirrorWeightsTest.blend1)

Keith Boshoff commented

2022-10-12 14:37:43 +02:00

Added subscriber: @Wahooney

Omar Emara commented

2022-10-12 15:02:17 +02:00

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

Omar Emara changed title from ~~Mirror Vertex Weights gives unpredictable results~~ to Regression: Mirror Vertex Weights gives unpredictable results

2022-10-12 15:04:20 +02:00

Omar Emara commented

2022-10-12 15:07:25 +02:00

Added subscriber: @OmarEmaraDev