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Maniphest T72438

"grab active vertex" + shape keys doesn't work properly
Closed, ResolvedPublicKNOWN ISSUE
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Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.28

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: rBf1aa4d18d49d
Worked: (optional)

Short description of error
in sculpt mode, using the grab brush with "grab active vertex" doesn't work properly if editing shape keys.

Exact steps for others to reproduce the error
please open the file to check it.

thank you.


grabactivevertex.blend691 KBDownload

Revisions and Commits

rB Blender
Changes PlannedD6426 Fix T72438: Use PBVH vert coordinates in sculpt API when using shape keys

Event Timeline

Massimiliano Puliero (mmaaxx) created this task.Dec 14 2019, 3:20 AM
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 80.Dec 16 2019, 2:17 PM
Philipp Oeser (lichtwerk) added a project: Sculpt, Paint & Texture.
Philipp Oeser (lichtwerk) added subscribers: Pablo Dobarro (pablodp606), Philipp Oeser (lichtwerk).

That is not only a problem with grab active vertex.
Yes, the preview is wrong (using the undeformed geometry), but it [the vertex dot] is so even if grab active vertex is turned OFF or another brush like Elastic Deform is used.

Not even sure if sculpting on shapekeys is properly supported like that?

CC @Pablo Dobarro (pablodp606)

Pablo Dobarro (pablodp606) added a revision: D6426: Fix T72438: Use PBVH vert coordinates in sculpt API when using shape keys.Dec 17 2019, 4:20 AM
Pablo Dobarro (pablodp606) added a comment.Dec 17 2019, 4:22 AM

In theory it is not supported, the grab active vertex, cursor and mesh preview always use the original coordinates. I made a fix for this case, but we need to think if it is worth supporting it.

Pablo Dobarro (pablodp606) changed the subtype of this task from "Report" to "Known Issue".Jan 9 2020, 11:39 PM

There is a patch for this report, but I would like to reconsider if this is the optimal way to fix it. I would prefer to consider it a limitation of how grab active vertex works for now.

Germano Cavalcante (mano-wii) closed this task as Resolved.Jul 9 2020, 3:40 PM
Germano Cavalcante (mano-wii) claimed this task.
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).

I reproduced this bug in blender 2.81, but not the latest daily build, so it appears the bug has been fixed already.

Please try the latest daily build: https://builder.blender.org/download/

If the problem persists, please let us know so we can re-open the report. Don't forget to mention the specific version you tested again.