Improve Interior Face Selection Method #68401

New Issue

RobHue · 2019-08-08T08:46:57+02:00

RobHue commented

2019-08-08 08:46:57 +02:00

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Worked: (optional)

Short description of error
Select > Select By Trait > Interior Faces also selects outer faces

Exact steps for others to reproduce the error

Open up mengerSponge.blend
which contains a menger sponge at level 3; also contains a script to generate menger sponges

0.) go into edit mode
1.) select all
2.) merge by distance (aka remove doubles; merge dist: 0.0001m)
3.) deselect all
4.) Select > Select By Trait > Interior Faces

Result of Interior Face Selection: Does also select additional faces on the outside of the mesh (as shown below in picture01)

picture01 showing, that not only the interior faces are selected
picture02 showing, that interior face selection works for the menger sponge at level 1

**System Information** Operating system: Windows-10-10.0.17763 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` Worked: (optional) **Short description of error** Select > Select By Trait > Interior Faces also selects outer faces **Exact steps for others to reproduce the error** Open up [mengerSponge.blend](https://archive.blender.org/developer/F7654070/mengerSponge.blend) *which contains a menger sponge at level 3; also contains a script to generate menger sponges* 0.) go into edit mode 1.) select all 2.) merge by distance (aka remove doubles; merge dist: 0.0001m) 3.) deselect all 4.) Select > Select By Trait > Interior Faces **Result of Interior Face Selection:** Does also select additional faces on the outside of the mesh (as shown below in picture01) - picture01 showing, that not only the interior faces are selected ![interiorFacesBug.png](https://archive.blender.org/developer/F7654067/interiorFacesBug.png) - picture02 showing, that interior face selection works for the menger sponge at level 1 ![interFacesWorkingAtLevel1.png](https://archive.blender.org/developer/F7654080/interFacesWorkingAtLevel1.png)

RobHue commented

2019-08-08 08:46:57 +02:00

Added subscriber: @RobHue

blender-admin commented

2019-08-08 08:46:57 +02:00

#68337 was marked as duplicate of this issue

RobHue commented

2019-08-08 09:36:45 +02:00

Could also relate to the problem referred to in the blender source code comment:

C:\blender-git\blender\source\blender\editors\mesh\editmesh_select.c

/** \name Select Interior Faces
*

\note This algorithm is limited to single faces and could be improved, see:

https://blender.stackexchange.com/questions/18916

{ */

bool EDBM_select_interior_faces(BMEditMesh *em)

Could also relate to the problem referred to in the blender source code comment: ***C:\blender-git\blender\source\blender\editors\mesh\editmesh_select.c*** > > /** \name Select Interior Faces > * > * \note This algorithm is limited to single faces and could be improved, see: > * https://blender.stackexchange.com/questions/18916 > * \{ */ > > bool EDBM_select_interior_faces(BMEditMesh *em)

Campbell Barton changed title from ~~Interior Face Selection also selects outer faces~~ to Improver Interior Face Selection Method

2019-08-08 09:42:19 +02:00

Campbell Barton commented

2019-08-08 09:43:12 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2019-08-08 09:43:12 +02:00

This is a known todo, listed it here #63731 (Modeling Module)

Campbell Barton changed title from ~~Improver Interior Face Selection Method~~ to Improve Interior Face Selection Method

2019-08-08 09:45:27 +02:00

RobHue commented

2019-08-08 09:59:45 +02:00

The description of the Interior Face Selection Method does what it should be doing:
"Select faces where all edges have more than 2 face users" not sure what users are. Someone said that it could be also refered to as "connected faces".

So yes; it would be rather an improvement than a bug fix.

A more minimal example of interior face selection: (a simple plus made out of 5 boxes merged)
moreMinimalExampleOfInteriorFaceSelectionImprovement.blend

The description of the Interior Face Selection Method does what it should be doing: "Select faces where all edges have more than 2 face users" not sure what users are. Someone said that it could be also refered to as "connected faces". So yes; it would be rather an improvement than a bug fix. A more minimal example of interior face selection: (a simple plus made out of 5 boxes merged) [moreMinimalExampleOfInteriorFaceSelectionImprovement.blend](https://archive.blender.org/developer/F7654130/moreMinimalExampleOfInteriorFaceSelectionImprovement.blend)

Bastien Montagne commented

2019-08-08 15:30:18 +02:00

Added subscribers: @dadriel, @EAW, @Patnard

blender-admin commented

2019-09-08 17:41:11 +02:00

This issue was referenced by a9dbc2ef4a

This issue was referenced by a9dbc2ef4a73a26e426704fd22eec630f9685566

Campbell Barton commented

2019-09-08 17:50:34 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2019-09-08 17:50:34 +02:00

Campbell Barton self-assigned this 2019-09-08 17:50:34 +02:00

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Improve Interior Face Selection Method #68401