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Maniphest T81266

Unable to select certain vertices (regression from 2.79)
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1080 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.38

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-28 19:10, hash: rBd5353eea5b28

Short description of error
Some vertices are impossible to select.

At first I thought it was because the vertices formed a concave area (see first file) but then I hit a second concave case (see second file).

Exact steps for others to reproduce the error
Without rotating or zooming the view try to select one of the marked vertices in both files.

Select1.blend107 KBDownload

Select2.blend103 KBDownload

2.79 worked in this case, open this file in 2.79 to test.

Select1(1)_279.blend478 KBDownload

Revisions and Commits

rB Blender
Needs ReviewD12123 BLI: new 'projmat_depth_offset' utility

Related Objects

Event Timeline

Daniel Salazar (zanqdo) created this task.Sep 28 2020, 10:46 PM
Daniel Salazar (zanqdo) updated the task description. (Show Details)
Daniel Salazar (zanqdo) updated the task description. (Show Details)Sep 28 2020, 11:30 PM
Daniel Salazar (zanqdo) renamed this task from Unable to select vertices that form the edge of a concave geometry to Unable to select certain vertices.Sep 29 2020, 5:04 AM
Daniel Salazar (zanqdo) updated the task description. (Show Details)
Daniel Salazar (zanqdo) updated the task description. (Show Details)
Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Needs Information from User.Sep 29 2020, 11:27 AM
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Looks like a precision problem, have you tried tweaking the view clip planes?

Daniel Salazar (zanqdo) added a comment.Sep 29 2020, 11:40 PM

Yes, first thing I did, it doesn't seem normal that you need such a tight clipping range. 1km I can understand but 100m should work!

Philipp Oeser (lichtwerk) changed the task status from Needs Information from User to Needs Triage.Sep 30 2020, 10:23 AM
Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Needs Information from Developers.Sep 30 2020, 10:55 AM
Philipp Oeser (lichtwerk) added projects: Modeling, EEVEE & Viewport.
Philipp Oeser (lichtwerk) added a subscriber: Clément Foucault (fclem).

Just saying that clipping planes do have an influence.
In the second example (Select2.blend) the selection problem goes away when reducing the Clip End to 100m.
In the first example (Select1.blend) the rightmost and leftmost vertices become selectable when reducing the Clip End to 50m.

However, I canoot tweak the clipping planes to make the center vertex selectable either.

Unsure what could be wrong here without digging deeper, maybe @Clément Foucault (fclem) could comment?

Daniel Salazar (zanqdo) added a comment.Sep 30 2020, 11:24 PM

Understood, as you said, there are still cases that remain unselectable no matter the clipping range. Also 0.1 - 100m is not an insane range.

Campbell Barton (campbellbarton) changed the task status from Needs Information from Developers to Confirmed.EditedAug 3 2021, 2:56 AM
Campbell Barton (campbellbarton) updated the task description. (Show Details)
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Confirmed, also that this worked in 2.79 so I think it's reasonable to consider this a regression (added test file).

Campbell Barton (campbellbarton) renamed this task from Unable to select certain vertices to Unable to select certain vertices (regression from 2.79).Aug 3 2021, 2:57 AM
Campbell Barton (campbellbarton) removed a project: Modeling.
Germano Cavalcante (mano-wii) mentioned this in D5490: DRW: New Select Debug Engine.Aug 3 2021, 5:55 PM
Germano Cavalcante (mano-wii) added a revision: D12123: BLI: new 'projmat_depth_offset' utility.Aug 3 2021, 11:32 PM
Campbell Barton (campbellbarton) merged a task: T90207: Problem seeing vertices/edges in edit mode with orthographic view.Aug 4 2021, 1:00 PM
Campbell Barton (campbellbarton) added subscribers: Sebastien Larocque (SebBlender), Pratik Borhade (PratikPB2123).