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Maniphest T78751

UV rip gives strange results on some faces
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.59

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-08 20:30, hash: rB31bc76ea4e4b

Short description of error
I'm trying out the new UV Rip {80393a0ebadc} that was recently commited by Campbell Barton. It works in most cases, but on some random faces it gives a strange result

Example with strange result
starting point
result after RIP UV and move
Other faces that works just fine
starting point
result after RIP UV and move

Exact steps for others to reproduce the error

uv_rip_issue_v001.blend166 KBDownload

  1. Open the attached .blend
  2. select marked faces in 3d view or in UV Editor
  3. Press V for UV Rip and move
  4. Observe the strange result

Revisions and Commits

rB Blender
rB89cb41faa059 UV: allow ripping face-regions

Related Objects
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StatusSubtypeAssignedTask
 ResolvedCampbell Barton (campbellbarton)T78751 UV rip gives strange results on some faces
 ResolvedDESIGNNoneT78409 Rip UV

Event Timeline

Daniel Bystedt (dbystedt) changed the task status from Needs Triage to Needs Information from Developers.Jul 9 2020, 3:24 AM
Daniel Bystedt (dbystedt) assigned this task to Campbell Barton (campbellbarton).
Daniel Bystedt (dbystedt) created this task.
Daniel Bystedt (dbystedt) added a subtask: T78409: Rip UV.
Campbell Barton (campbellbarton) added a comment.Jul 9 2020, 12:30 PM

This can be made to work, although it's not really ripping (at least it's using different rules). It would be the same as pressing Y (separate) than G (move).

I'll add this behavior, just noting that it's adding a special case for when faces are selected, compared to edge loop.

Campbell Barton (campbellbarton) changed the task status from Needs Information from Developers to Confirmed.Jul 9 2020, 12:31 PM
Campbell Barton (campbellbarton) added a project: Restricted Project.
Campbell Barton (campbellbarton) moved this task from Restricted Project Column to Restricted Project Column on the Restricted Project board.
Campbell Barton (campbellbarton) added a project: Restricted Project.
Daniel Bystedt (dbystedt) added a comment.Jul 9 2020, 9:46 PM

Thanks a lot @Campbell Barton (campbellbarton). I keep forgetting the "select split" + "move" combination Adding the functionality you mention will help a lot of users I think

Campbell Barton (campbellbarton) closed this task as Resolved by committing rB89cb41faa059: UV: allow ripping face-regions.Jul 10 2020, 5:02 AM
Campbell Barton (campbellbarton) added a commit: rB89cb41faa059: UV: allow ripping face-regions.
Daniel Bystedt (dbystedt) closed subtask T78409: Rip UV as Resolved.Jul 15 2020, 12:01 PM