Knife tool stopped showing preview vertex and does not cut. (2.82) #70869

New Issue

Yuri · 2019-10-16T10:32:11+02:00

Yuri commented

2019-10-16 10:32:11 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce 920M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.17

Blender Version
Broken: version: 2.82 (sub 0), branch: master, commit date: 2019-10-15 09:30, hash: 3db7f145df
Worked: (optional)

Short description of error
In perspective view knife tool not working and not showing preview pixel/line.

In side view everything works fine.

Exact steps for others to reproduce the error
Select object.
Make sure you are in perspective view mode.
Press TAB.
Press K or select Knife Tool.

knife bug.blend
By the way I've deleted everything from project. One object with 10 verts is left. I don't know why blend file is 35 mb.

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce 920M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.17 **Blender Version** Broken: version: 2.82 (sub 0), branch: master, commit date: 2019-10-15 09:30, hash: `3db7f145df` Worked: (optional) **Short description of error** In perspective view knife tool not working and not showing preview pixel/line. ![blender_knifetool.gif](https://archive.blender.org/developer/F7825141/blender_knifetool.gif) In side view everything works fine. ![blender_knifetool 2.gif](https://archive.blender.org/developer/F7825144/blender_knifetool_2.gif) **Exact steps for others to reproduce the error** Select object. Make sure you are in perspective view mode. Press TAB. Press K or select Knife Tool. [knife bug.blend](https://archive.blender.org/developer/F7825148/knife_bug.blend) By the way I've deleted everything from project. One object with 10 verts is left. I don't know why blend file is 35 mb.

Yuri commented

2019-10-16 10:32:11 +02:00

Added subscriber: @YanDaik

Stanislav Blinov commented

2019-10-16 11:15:27 +02:00

Added subscriber: @Stan_Pancakes

Stanislav Blinov commented

2019-10-16 11:15:27 +02:00

You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less.

Stanislav Blinov commented

2019-10-16 11:25:22 +02:00

As to why the file is 35Mb: Blender does not delete orphaned data immediately, only when you reopen the fie. You can see it if you switch the outliner to show Orphan Data. You deleted the objects, which made their meshes orphaned (0 users). On next reload, i.e. loading the file attached to this report, the meshes are removed, which then makes all the materials orphaned. This is what you will see in Orphan Data in this file, it'll show +99 Materials, though it would appear there's actually almost 1800! Anyway, if you save this file again and reload it, materials will be removed, but images are only orphaned. Finally, saving and reloading again gets rid of the images as well.

Jacques Lucke commented

2019-10-16 14:55:06 +02:00

Added subscribers: @ideasman42, @JacquesLucke

Campbell Barton was assigned by Jacques Lucke

2019-10-16 14:55:06 +02:00

Jacques Lucke commented

2019-10-16 14:55:06 +02:00

I can confirm what @Stan_Pancakes said. I'm not sure if this should be considered a bug or whether this should be some warning. Will leave the decision to @campbellbarton.

Btw, instead of saving and reloading you can also click on Purge in the orphan view in the outliner.

I can confirm what @Stan_Pancakes said. I'm not sure if this should be considered a bug or whether this should be some warning. Will leave the decision to @campbellbarton. Btw, instead of saving and reloading you can also click on Purge in the orphan view in the outliner.

Stanislav Blinov commented

2019-10-16 15:15:23 +02:00

@JacquesLucke a warning could be a good thing for UX. People seem to run into this on a regular basis.

Yuri commented

2019-10-17 10:18:30 +02:00

@Stan_Pancakes Ok thanks. I was confused because it was working well. I've changed clipping plane few days ago and it was fine.

Brecht Van Lommel commented

2019-11-06 16:52:46 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-11-06 16:52:46 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-11-06 16:52:46 +01:00

Brecht Van Lommel commented

2019-11-06 16:52:46 +01:00

I don't think there is a good way to show a warning without it also being annoying in cases where it's intentional. Either way, seems outside the scope of the bug tracker.

Mark commented

2020-03-23 03:13:39 +01:00

Added subscriber: @mark.lowe

Mark commented

2020-03-23 03:13:39 +01:00

In #70869#796786, @Stan_Pancakes wrote:
You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less.

I don't know why this kills the knife tool, but this was EXACTLY my issue. Thank you for the fix!

> In #70869#796786, @Stan_Pancakes wrote: > You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less. I don't know why this kills the knife tool, but this was EXACTLY my issue. Thank you for the fix!

Ryan (theoryshaw) Schultz commented

2020-09-03 05:32:52 +02:00

Added subscriber: @Ryan-Schultz

Ryan (theoryshaw) Schultz commented

2020-09-03 05:32:52 +02:00

In #70869#796786, @Stan_Pancakes wrote:
You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less.

this worked for me as well.

> In #70869#796786, @Stan_Pancakes wrote: > You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less. this worked for me as well.

Rafael commented

2021-07-14 15:58:34 +02:00

Added subscriber: @rafael_design

Rafael commented

2021-07-14 15:58:34 +02:00

In #70869#796786, @Stan_Pancakes wrote:
You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less.

That's it! I as well think a warning would be easier that google it for hours. Maybe not hours but...

> In #70869#796786, @Stan_Pancakes wrote: > You've set the far clipping plane too far, resulting in very poor depth precision, resulting in knife not being able to project properly. Open the N key sidebar and lower the Clip End value in View to something like 1000 or even less. That's it! I as well think a warning would be easier that google it for hours. Maybe not hours but...

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Knife tool stopped showing preview vertex and does not cut. (2.82) #70869