Select Linked works incorrectly #75128

New Issue

Ivan Perevala · 2020-03-27T12:21:01+01:00

Ivan Perevala commented

2020-03-27 12:21:01 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.75

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: 77d23b0bd7
Worked: (optional)

Short description of error
https://youtu.be/ptnwfjPIuP0
The operator "Select Linked" does not select anything if one vertex is initially selected on the edge of a non-manifold object

Exact steps for others to reproduce the error

Open attached file
Select a border vertex.
Press Ctrl+L

test_select_linked.blend

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.75 **Blender Version** Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: `77d23b0bd7` Worked: (optional) **Short description of error** https://youtu.be/ptnwfjPIuP0 The operator "Select Linked" does not select anything if one vertex is initially selected on the edge of a non-manifold object **Exact steps for others to reproduce the error** - Open attached file - Select a border vertex. - Press Ctrl+L [test_select_linked.blend](https://archive.blender.org/developer/F8431971/test_select_linked.blend)

Ivan Perevala commented

2020-03-27 12:21:01 +01:00

Added subscriber: @ivpe

Germano Cavalcante commented

2020-03-27 20:00:40 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-03-27 20:00:40 +01:00

Can you provide a simple blend file showing the problem?

Ivan Perevala commented

2020-03-27 21:09:49 +01:00

Strange, but I found out that the problem is related to the addon that I wrote. I’m trying to recreate the conditions that cause this behavior of standard tools, but I’m sure that the selection state does not contradict this
requirements. In the near future I hope to find the reason, I’ll ask you not to close the task yet.

Strange, but I found out that the problem is related to the addon that I wrote. I’m trying to recreate the conditions that cause this behavior of standard tools, but I’m sure that the selection state does not contradict [this](https://docs.blender.org/api/current/bmesh.html#keeping-a-correct-state) requirements. In the near future I hope to find the reason, I’ll ask you not to close the task yet.

Germano Cavalcante commented

2020-03-27 21:34:37 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Ivan Perevala commented

2020-03-27 22:12:50 +01:00

I rewrote the part of the addon which causes further problems.
To recreate a problem you need to:

There is a script in the attached file, run it
Run the operator in the viewport (F3> Test Operator)
Click several times on the mesh and press enter
Select the vertex that is on the edge of the mesh and press Ctrl + L

As you can see, problems arise only for the vertices located on the edge of the mesh, for the rest everything works fine

https://youtu.be/D1gunINN9PE
test_select_linked.blend

I rewrote the part of the addon which causes further problems. To recreate a problem you need to: - There is a script in the attached file, run it - Run the operator in the viewport (F3> Test Operator) - Click several times on the mesh and press enter - Select the vertex that is on the edge of the mesh and press Ctrl + L As you can see, problems arise only for the vertices located on the edge of the mesh, for the rest everything works fine https://youtu.be/D1gunINN9PE [test_select_linked.blend](https://archive.blender.org/developer/F8430923/test_select_linked.blend)

Germano Cavalcante commented

2020-03-28 01:20:22 +01:00

As much as I click on the mesh with the operator running, I can't reproduce the problem.

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

Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue.

As much as I click on the mesh with the operator running, I can't reproduce the problem. Please try the latest daily build: https://builder.blender.org/download/ Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue.

Ivan Perevala commented

2020-03-28 18:29:42 +01:00

I've already tried to install 2.82a and to use daily build and I have the same issue. I made simplified as much as possible script. Please try to follow these steps:

Open attached file and run script
In the console should be next lines:

Initially selected BMVert [10]
"bpy.ops.mesh.select_linked_pick" select [24] verts

Select same vert in the viewport (just to make it active)
Press Ctrl+L

test_select_linked.blend

I've already tried to install 2.82a and to use daily build and I have the same issue. I made simplified as much as possible script. Please try to follow these steps: - Open attached file and run script - In the console should be next lines: ``` Initially selected BMVert [10] "bpy.ops.mesh.select_linked_pick" select [24] verts ``` - Select same vert in the viewport (just to make it active) - Press Ctrl+L [test_select_linked.blend](https://archive.blender.org/developer/F8431971/test_select_linked.blend)

Germano Cavalcante commented

2020-04-01 13:51:25 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Germano Cavalcante commented

2020-04-01 15:29:09 +02:00

Added subscriber: @ideasman42

Germano Cavalcante commented

2020-04-01 15:29:09 +02:00

At first I thought you were referring to the select_linked_pick operator (shortcut L).
The select_linked operator (Ctrl L) actually ignores border elements if the delimitation is of the NORMAL type.
This seems to be buggy from the user's perspective.
I have not found documentation explaining this behavior. @ideasman42, does it work as intended?

At first I thought you were referring to the `select_linked_pick` operator (shortcut L). The `select_linked` operator (Ctrl L) actually ignores border elements if the delimitation is of the `NORMAL` type. This seems to be buggy from the user's perspective. I have not found documentation explaining this behavior. @ideasman42, does it work as intended?

Germano Cavalcante commented

2020-04-02 15:17:45 +02:00

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