Selecting and removing of self intersection geometry #93308

New Issue

RT · 2021-11-22T19:06:25+01:00

RT commented

2021-11-22 19:06:25 +01:00

System Information
Operating system: Linux-5.13.0-7620-generic-x86_64-with-glibc2.31 64 Bits
Graphics card: Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 21.2.2

Blender Version
Broken: version: 3.0.0 Beta, branch: master, commit date: 2021-11-08 15:56, hash: ab7214ca2e
and 2.93.6

Short description of error
Can't select and remove self intersecting geometry it keeps sayingno intersections found.
I've also posted a question to see if it's just changed function or a possible bug.
https://blender.stackexchange.com/questions/243892/removing-of-self-intersection-geometry

Exact steps for others to reproduce the error
Select geometry and use Face -Intersect (Kinfe) - Self intersect.

Animated gif of how it worked in an old version of Blender
The video tutorial / section I'm trying to follow starts at. @1:16 https://youtu.be/-rwvxusuJXU?t=81

Animated gif of how it doesn't work at the moment.

Zip blend file
self_intersect.blend.zip

**System Information** Operating system: Linux-5.13.0-7620-generic-x86_64-with-glibc2.31 64 Bits Graphics card: Mesa DRI Intel(R) HD Graphics 4600 (HSW GT2) Intel Open Source Technology Center 4.5 (Core Profile) Mesa 21.2.2 **Blender Version** Broken: version: 3.0.0 Beta, branch: master, commit date: 2021-11-08 15:56, hash: `ab7214ca2e` and 2.93.6 **Short description of error** Can't select and remove self intersecting geometry it keeps saying**no intersections found.** I've also posted a question to see if it's just changed function or a possible bug. https://blender.stackexchange.com/questions/243892/removing-of-self-intersection-geometry **Exact steps for others to reproduce the error** Select geometry and use Face -Intersect (Kinfe) - Self intersect. Animated gif of how it worked in an old version of Blender The video tutorial / section I'm trying to follow starts at. @1:16 https://youtu.be/-rwvxusuJXU?t=81 ![1-working.gif](https://archive.blender.org/developer/F11851161/1-working.gif) Animated gif of how it doesn't work at the moment. ![2in.gif](https://archive.blender.org/developer/F11851174/2in.gif) Zip blend file [self_intersect.blend.zip](https://archive.blender.org/developer/F11851218/self_intersect.blend.zip)

RT commented

2021-11-22 19:06:25 +01:00

Added subscriber: @Still

Philipp Oeser commented

2021-11-23 15:00:11 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-11-23 15:00:11 +01:00

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

Philipp Oeser closed this issue

2021-11-23 15:00:11 +01:00

Philipp Oeser commented

2021-11-23 15:00:11 +01:00

Looks like in your file the intersect already took place?
(when I do Select > All By Trait > Non Manifold I can already see the cutting edges selected).

What makes this file also different is that the cutting edges have not been separated, so what Campbell does then (Select Linked, Select Invert etc.) does not work out nicely anymore.
(you could still mark the non manifold edges as seams and select linked with seam delimiter, but still, lets do this from scratch):

self_intersect_repro.blend

open this file
Intersect Knife (Self Intersect, Separate Mode: All (this is important to be able to select the different parts better), Fast)
edge select mode
Select > All By Trait > Non Manifold (to see where the cuts have been made)
deselect all
face select mode
select one of the outer faces
{key Ctrl + L} (to select all outer faces)
{key Ctrl + I} (to select all inner faces)
voila, you can now move the inner part elsewhere (or delete it)

So to sum it up: this does not seem like a bug, will close
(but of course feel free to comment again if issues persist)

Looks like in your file the intersect already took place? (when I do `Select` > `All By Trait` > `Non Manifold` I can already see the cutting edges selected). What makes this file also different is that the cutting edges have not been separated, so what Campbell does then (`Select Linked`, `Select Invert` etc.) does not work out nicely anymore. (you could still mark the non manifold edges as seams and select linked with seam delimiter, but still, lets do this from scratch): [self_intersect_repro.blend](https://archive.blender.org/developer/F11895948/self_intersect_repro.blend) - open this file - Intersect Knife (Self Intersect, Separate Mode: All (this is important to be able to select the different parts better), Fast) ![image.png](https://archive.blender.org/developer/F11896043/image.png) - edge select mode - `Select` > `All By Trait` > `Non Manifold` (to see where the cuts have been made) - deselect all - face select mode - select one of the outer faces - {key Ctrl + L} (to select all outer faces) - {key Ctrl + I} (to select all inner faces) - voila, you can now move the inner part elsewhere (or delete it) So to sum it up: this does not seem like a bug, will close (but of course feel free to comment again if issues persist)

RT commented

2021-11-25 06:42:38 +01:00

Thanks! that helps a lot. :-)

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Selecting and removing of self intersection geometry #93308