Knife tool erratic aiming on complex model #70384

New Issue

Robert S · 2019-09-30T08:50:37+02:00

Robert S commented

2019-09-30 08:50:37 +02:00

System Information
Operating system: Win 10 1903
Graphics card: 1080

Blender Version
Broken: 2.80 release
Worked: (optional)

Short description of error
Knife tool reacts erratically and won't cut on a complex model:

https://youtu.be/_BAuiRa3wqk

Exact steps for others to reproduce the error
Not sure if it's in my file only, but it's not a file I can share publicly, so if a developer wants to take a look, let me know and I can send it to you (It's a 70mb .FBX with 1.4 million polygons in it, imported from CAD data into Max and then exported from there).

**System Information** Operating system: Win 10 1903 Graphics card: 1080 **Blender Version** Broken: 2.80 release Worked: (optional) **Short description of error** Knife tool reacts erratically and won't cut on a complex model: https://youtu.be/_BAuiRa3wqk **Exact steps for others to reproduce the error** Not sure if it's in my file only, but it's not a file I can share publicly, so if a developer wants to take a look, let me know and I can send it to you (It's a 70mb .FBX with 1.4 million polygons in it, imported from CAD data into Max and then exported from there).

Robert S commented

2019-09-30 08:50:37 +02:00

Added subscriber: @RobertS

Ricardo commented

2019-09-30 12:48:56 +02:00

Added subscriber: @INeedMana

Ricardo commented

2019-09-30 12:48:56 +02:00

Try to hide all faces except the ones you want to make the cut, select the faces you want and then with SHIFT+H you will hide everything else, and then try to make the cut.

Philipp Oeser commented

2019-09-30 13:13:30 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-09-30 13:13:30 +02:00

Hm, there is #65585 (Knife Tool fail if camera is too close to the object and mouse away from object) and #62285 (Knife Tool produces bad geometry in certain cases (disconnected edges/vertices, overlapping faces)) already, but in order to reproduce, we would really need an example .blend file.
(looks like it could be a duplicate of #65585, really)

Do you have an example you can share?
Does this happen on other zoom levels as well?
Does this also happen on a [reduced, sharable] subset of that geometry?

Hm, there is #65585 (Knife Tool fail if camera is too close to the object and mouse away from object) and #62285 (Knife Tool produces bad geometry in certain cases (disconnected edges/vertices, overlapping faces)) already, but in order to reproduce, we would really need an example .blend file. (looks like it could be a duplicate of #65585, really) Do you have an example you can share? Does this happen on other zoom levels as well? Does this also happen on a [reduced, sharable] subset of that geometry?

Robert S commented

2019-09-30 14:15:19 +02:00

@INeedMana this workaround made the knife tool behave as normal again, thank you!

@lichtwerk It does not happen on any reduced version of the file, so I think you may be correct in your suspicion that it is probably a duplicate of #65585.

@INeedMana this workaround made the knife tool behave as normal again, thank you! @lichtwerk It does not happen on any reduced version of the file, so I think you may be correct in your suspicion that it is probably a duplicate of #65585.

Bastien Montagne commented

2019-10-14 11:47:37 +02:00

Closed as duplicate of #65585

Bastien Montagne closed this issue

2019-10-14 11:47:37 +02:00

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Knife tool erratic aiming on complex model #70384