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Discontinuous cutting with the knife tool #93695

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opened 2021-12-05 12:19:12 +01:00 by NanZhang · 8 comments
NanZhang commented 2021-12-05 12:19:12 +01:00
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System Information
Operating system:Win11/MacOS
Graphics card:RTX3080/5700XT

Blender Version
Broken: 3.0.0 Master - Caused by 6e77afe6ec
Worked: 2.93.6

Short description of error
In the new 3.0, when the knife tool cut Sculpture or scans model, a large number of discontinuous breakpoints will appear.
When the cutting line is long, there may even be more than Dozens breakpoints, and it is difficult to troubleshoot.
In 2.93.6, there are almost no breakpoints in the same operation.

Suggest:
When the cutting tool is cutting a continuous surface, please ensure that the cutting line is also continuous, otherwise you need to check whether the line is continuous after cutting, which is very time-consuming.

Exact steps for others to reproduce the error

  • open attached file
  • make the cut as shown in the images below (make sure the middle vertex is snapped)
  • compare version 2.93 with 3.0
    2.93.6 3.0.1
    image.png image.png
    image.png image.png
    knife_cut_bug.blend

Other images:
截屏2021-12-05 01.51.13.jpeg
截屏2021-12-05 01.51.44.jpeg
截屏2021-12-05 01.51.49.jpeg
截屏2021-12-05 01.51.55.jpeg
截屏2021-12-05 01.53.17.jpeg
截屏2021-12-05 01.53.37.jpeg
截屏2021-12-05 01.53.48.jpeg
截屏2021-12-05 01.53.57.jpeg
截屏2021-12-05 02.02.12.jpeg
截屏2021-12-05 02.02.38.jpeg
截屏2021-12-05 02.02.48.jpeg
截屏2021-12-05 02.02.59.jpeg

**System Information** Operating system:Win11/MacOS Graphics card:RTX3080/5700XT **Blender Version** Broken: 3.0.0 Master - Caused by 6e77afe6ec Worked: 2.93.6 **Short description of error** In the new 3.0, when the knife tool cut Sculpture or scans model, a large number of discontinuous breakpoints will appear. When the cutting line is long, there may even be more than Dozens breakpoints, and it is difficult to troubleshoot. In 2.93.6, there are almost no breakpoints in the same operation. Suggest: When the cutting tool is cutting a continuous surface, please ensure that the cutting line is also continuous, otherwise you need to check whether the line is continuous after cutting, which is very time-consuming. **Exact steps for others to reproduce the error** - open attached file - make the cut as shown in the images below (make sure the middle vertex is snapped) - compare version 2.93 with 3.0 | 2.93.6 | 3.0.1 | --- | --- | ![image.png](https://archive.blender.org/developer/F12727347/image.png) | ![image.png](https://archive.blender.org/developer/F12727308/image.png) | ![image.png](https://archive.blender.org/developer/F12727354/image.png) | ![image.png](https://archive.blender.org/developer/F12727313/image.png) [knife_cut_bug.blend](https://archive.blender.org/developer/F12727339/knife_cut_bug.blend) --- **Other images:** ![截屏2021-12-05 01.51.13.jpeg](https://archive.blender.org/developer/F12691387/截屏2021-12-05_01.51.13.jpeg) ![截屏2021-12-05 01.51.44.jpeg](https://archive.blender.org/developer/F12691389/截屏2021-12-05_01.51.44.jpeg) ![截屏2021-12-05 01.51.49.jpeg](https://archive.blender.org/developer/F12691392/截屏2021-12-05_01.51.49.jpeg) ![截屏2021-12-05 01.51.55.jpeg](https://archive.blender.org/developer/F12691395/截屏2021-12-05_01.51.55.jpeg) ![截屏2021-12-05 01.53.17.jpeg](https://archive.blender.org/developer/F12691397/截屏2021-12-05_01.53.17.jpeg) ![截屏2021-12-05 01.53.37.jpeg](https://archive.blender.org/developer/F12691399/截屏2021-12-05_01.53.37.jpeg) ![截屏2021-12-05 01.53.48.jpeg](https://archive.blender.org/developer/F12691401/截屏2021-12-05_01.53.48.jpeg) ![截屏2021-12-05 01.53.57.jpeg](https://archive.blender.org/developer/F12691403/截屏2021-12-05_01.53.57.jpeg) ![截屏2021-12-05 02.02.12.jpeg](https://archive.blender.org/developer/F12691405/截屏2021-12-05_02.02.12.jpeg) ![截屏2021-12-05 02.02.38.jpeg](https://archive.blender.org/developer/F12691408/截屏2021-12-05_02.02.38.jpeg) ![截屏2021-12-05 02.02.48.jpeg](https://archive.blender.org/developer/F12691410/截屏2021-12-05_02.02.48.jpeg) ![截屏2021-12-05 02.02.59.jpeg](https://archive.blender.org/developer/F12691412/截屏2021-12-05_02.02.59.jpeg)
NanZhang commented 2021-12-05 12:19:12 +01:00
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Added subscriber: @Zenithknight

Added subscriber: @Zenithknight
Germano Cavalcante commented 2021-12-10 16:20:03 +01:00
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Added subscribers: @HobbesOS, @mano-wii

Added subscribers: @HobbesOS, @mano-wii
Germano Cavalcante commented 2021-12-10 16:20:03 +01:00
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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Germano Cavalcante commented 2021-12-10 16:20:03 +01:00
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Thanks for the report, I can confirm.
The bug was introduced in 6e77afe6ec
@HobbesOS, can you take a look?

Thanks for the report, I can confirm. The bug was introduced in 6e77afe6ec @HobbesOS, can you take a look?
Germano Cavalcante changed title from 3.0.0 Knife tool issue to Discontinuous cutting with the knife tool 2021-12-17 21:49:09 +01:00
Cian Jinks self-assigned this 2022-01-05 13:42:01 +01:00
Cian Jinks commented 2022-01-05 13:42:01 +01:00
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Apologies, this ticket somehow got lost in my email. Will take a look at it today.

Apologies, this ticket somehow got lost in my email. Will take a look at it today.
blender-admin commented 2022-01-05 19:27:52 +01:00
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This issue was referenced by 72aefef9d2

This issue was referenced by 72aefef9d23aa0c355822324b91e83c1f3fbbaab
blender-admin commented 2022-01-05 19:27:52 +01:00
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This issue was referenced by 1dc0bf86bb

This issue was referenced by 1dc0bf86bb50ac8fb20df071472cee53dbe31fcb
Cian Jinks commented 2022-01-05 19:46:24 +01:00
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Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
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