Knife tool doesn't render #86335

New Issue

Peter · 2021-03-06T13:56:25+01:00

Peter commented

2021-03-06 13:56:25 +01:00

System Information
Operating system: Mac 10.15.7 (19H2)
Graphics card: Radeon RX 570 8 GB

Blender Version
version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab, type: Release

Short description of error
Knife tool doesn't render in the viewport. building.blend

Exact steps for others to reproduce the error
Blender file attached which demonstrates the problem. Open file. Select plane. Go to edit mode. Press K. Nothing happens. If you create a similar plane next to it, then knife works.

Btw. knife tool looks like it is working but nothing is rendered.

**System Information** Operating system: Mac 10.15.7 (19H2) Graphics card: Radeon RX 570 8 GB **Blender Version** version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab44, type: Release **Short description of error** Knife tool doesn't render in the viewport. [building.blend](https://archive.blender.org/developer/F9873073/building.blend) **Exact steps for others to reproduce the error** Blender file attached which demonstrates the problem. Open file. Select plane. Go to edit mode. Press K. Nothing happens. If you create a similar plane next to it, then knife works. Btw. knife tool looks like it is working but nothing is rendered.

Peter commented

2021-03-06 13:56:25 +01:00

Added subscriber: @whoisthis

Pratik Borhade commented

2021-03-06 14:57:20 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-03-06 14:57:20 +01:00

@whoisthis , thanks for report . Not sure about your report . But when I try to drag knife on plane , Blender crashes .

Peter commented

2021-03-06 16:38:36 +01:00

Hey @PratikPB2123
Besides what I reported (that the tool's lines are not showing on the plane), similar also happened to me. Blender gets into some infinite cycle, that slows down the entire machine. I have to wait like 20-30sec then the UI becomes responsive again.

Hey @PratikPB2123 Besides what I reported (that the tool's lines are not showing on the plane), similar also happened to me. Blender gets into some infinite cycle, that slows down the entire machine. I have to wait like 20-30sec then the UI becomes responsive again.

Pratik Borhade commented

2021-03-06 18:51:36 +01:00

Will try tomorrow , need to update blender . Could you try with latest build once https://builder.blender.org/download/ ??

Peter commented

2021-03-06 19:02:53 +01:00

I just tested with Version 2.93.0 (2.93.0 2021-03-05)
Problem still exists.

I just tested with Version 2.93.0 (2.93.0 2021-03-05) Problem still exists.

Falk David commented

2021-03-08 12:46:05 +01:00

Added subscriber: @filedescriptor

Falk David commented

2021-03-08 12:46:05 +01:00

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

Falk David commented

2021-03-08 12:46:05 +01:00

I can confirm this on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-08 07:52, hash: 74c50d0c77.

Also seems to leak memory:
Error: Not freed memory blocks: 1, total unfreed memory 0.000023 MB

Note: When loading the default start-up file, the tool seems to be working correctly.

I can confirm this on the latest 2.93.0 Alpha, branch: master, commit date: 2021-03-08 07:52, hash: `74c50d0c77`. Also seems to leak memory: `Error: Not freed memory blocks: 1, total unfreed memory 0.000023 MB` Note: When loading the default start-up file, the tool seems to be working correctly.

Germano Cavalcante commented

2021-03-08 18:20:47 +01:00

Added subscriber: @mano-wii

Angus Stanton commented

2021-03-12 12:34:59 +01:00

Added subscriber: @ab_stanton

Angus Stanton commented

2021-03-12 12:34:59 +01:00

Could you give a description of how you created the plane? It also doesn't respond normally to other edit mode opetaions, so could be a wider bug not contained to knife tool.

The bug causes a crash in the latest master build, but in release it just doesn't work, with no crash.

Could you give a description of how you created the plane? It also doesn't respond normally to other edit mode opetaions, so could be a wider bug not contained to knife tool. The bug causes a crash in the latest master build, but in release it just doesn't work, with no crash.

Peter commented

2021-04-24 09:12:09 +02:00

Please excuse my non-professional wording below, I'm a newbie to Blender. I think I was able to reproduce the problem:

steps:

create plane
create bezier curve
scale and rotate curve so ends of it almost touches the edges of the plane. i used constraints (middle mouse button) so curve is co-planar with the plane.
convert curve to mesh
join curve and plane meshes
select the plane (that is now merged with the curve), go to edit mode (tab)
subdivide edges of the plane that are close to the two end of the curve
turn on auto merge
move end of curves to touch the vertices that was made previous by the subdivision
move the new joined vertices a little bit

the resulting blender file is attached, in which case the knife doesn't work on the curve edges only on the plane's original edges. similar effect than the original reported one. building21.blend

system info on which i made the attached file:

System Information
Operating system: Darwin-19.6.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon RX 570 OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.18

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: 02948a2cab

Please excuse my non-professional wording below, I'm a newbie to Blender. I think I was able to reproduce the problem: steps: - create plane - create bezier curve - scale and rotate curve so ends of it almost touches the edges of the plane. i used constraints (middle mouse button) so curve is co-planar with the plane. - convert curve to mesh - join curve and plane meshes - select the plane (that is now merged with the curve), go to edit mode (tab) - subdivide edges of the plane that are close to the two end of the curve - turn on auto merge - move end of curves to touch the vertices that was made previous by the subdivision - move the new joined vertices a little bit the resulting blender file is attached, in which case the knife doesn't work on the curve edges only on the plane's original edges. similar effect than the original reported one. [building21.blend](https://archive.blender.org/developer/F10035181/building21.blend) system info on which i made the attached file: **System Information** Operating system: Darwin-19.6.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon RX 570 OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.18 **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: `02948a2cab`

blender-admin commented

2021-04-29 17:37:10 +02:00

This issue was referenced by 9f1a409f3a

This issue was referenced by 9f1a409f3acdef770e30bfd04545feb8413f6f2b

Campbell Barton commented

2021-04-29 17:42:49 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2021-04-29 17:42:49 +02:00

Campbell Barton self-assigned this 2021-04-29 17:42:49 +02:00

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Knife tool doesn't render #86335