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Maniphest T47629

Mirror Modifier :vertex group option doesn't work
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Description

System Information
win 7 64x / gtx 970

Blender Version
Broken: 2.76

In the mirror modifier, Vertex group checkbox as no effect, vertex group is mirrored anyway

Exact steps for others to reproduce the error
paint a vertex group on any mesh , add a mirror modifier, uncheck mirror, No change

Event Timeline

kevin deguisne (iscream) created this task.Feb 29 2016, 10:37 AM
kevin deguisne (iscream) raised the priority of this task from to 90.
kevin deguisne (iscream) updated the task description. (Show Details)
kevin deguisne (iscream) added a project: BF Blender.
kevin deguisne (iscream) edited a custom field.
kevin deguisne (iscream) added a subscriber: kevin deguisne (iscream).
ronan ducluzeau (zeauro) added a subscriber: ronan ducluzeau (zeauro).Feb 29 2016, 10:59 AM

This is normal behaviour of the option.
Checkbox is not here to avoïd mirroring of vertex group.
It is here to lateralize vertex group.

Vgroup_mirror.blend547 KBDownload

Take a look at this .blend.

Bone.L is selected. If you move it, Bone.L's vertex group is mirrored.
When selected bone is moved, both sides of mesh are moving.

If option is checked on Mirror modifier, vertex groups are modified.
Bone.R is moving right side of mesh and Bone.L is only moving left side.

Campbell Barton (campbellbarton) changed the task status from Unknown Status to Archived.Feb 29 2016, 12:18 PM
Campbell Barton (campbellbarton) claimed this task.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Tested with 2.76b and 2.77rc1, both are working as intended.

Closing.