Issue with the knife tool #82395

New Issue

bruh · 2020-11-04T10:29:47+01:00

bruh commented

2020-11-04 10:29:47 +01:00

System Information
Operating system: Windows 10.0.19041
Graphics card: GTX1650 (probably a mobile version)

Blender Version
version: 2.83.3, branch: master, commit date: 2020-07-22 06:01, hash: 353e5bd749, type: Release
Worked: Can't say

Short description of error
Error part A)
I'm modeling a plane and use the knife tool to make specific quads. But there seems to be an issue with the knife tool once you get very zoomed in : instead of behaving normally, helping you sticking a cut from an edge to the other, it systematically passes through the origin point / center of mass of your plane.

It seems to only happen with the mirror modifier

My point in image .

And it only happens when im this zoomed in.

Error part B) There's also an issue with the snapping of the knife in general with the mirror modifier. It fail to anchor cut points and will not cut upon clicking what seems to be a valid cut. Image here .

Exact steps for others to reproduce the error

Part B)

Add plane, rotate 90 on x.
Add mirror modifier
Font view, Extrude right side
Knife, try to cut the right square, will fail to clip on edges, no matter the zoom.

Part A)
5) Extrude the right side some more.
6) Move the view until the center of mass / origin of the plane isn't visible.
7) Zoom on an outer edge.
8) Try to cut to an inner edge, will clip to the origin on mass then proceed to the point B.

Very simple file that reproduces it attached below. bug_reproduced_knife.blend

**System Information** Operating system: Windows 10.0.19041 Graphics card: GTX1650 (probably a mobile version) **Blender Version** version: 2.83.3, branch: master, commit date: 2020-07-22 06:01, hash: 353e5bd7493e, type: Release Worked: Can't say **Short description of error** Error part A) I'm modeling a plane and use the knife tool to make specific quads. But there seems to be an issue with the knife tool once you get very zoomed in : instead of behaving normally, helping you sticking a cut from an edge to the other, it systematically passes through the origin point / center of mass of your plane. It seems to only happen with the mirror modifier My point in [image ](https://imgur.com/a/xXmDhrJ). And it only happens when im [this ](https://imgur.com/a/xXmDhrJ) zoomed in. Error part B) There's also an issue with the snapping of the knife in general with the mirror modifier. It fail to anchor cut points and will not cut upon clicking what seems to be a valid cut. Image [here ](https://i.imgur.com/1AJ2maM.png). **Exact steps for others to reproduce the error** Part B) 1) Add plane, rotate 90 on x. 2) Add mirror modifier 3) Font view, Extrude right side 4) Knife, try to cut the right square, will fail to clip on edges, no matter the zoom. Part A) 5) Extrude the right side some more. 6) Move the view until the center of mass / origin of the plane isn't visible. 7) Zoom on an outer edge. 8) Try to cut to an inner edge, will clip to the origin on mass then proceed to the point B. Very simple file that reproduces it attached below. [bug_reproduced_knife.blend](https://archive.blender.org/developer/F9192873/bug_reproduced_knife.blend)

bruh commented

2020-11-04 10:29:47 +01:00

Added subscriber: @Lipo

Philipp Oeser commented

2020-11-04 10:49:34 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-04 10:49:34 +01:00

Please only one issue per report.

Regarding Part A) This looks like a duplicate of #65585 (Knife Tool fail if camera is too close to the object and mouse away from object), will merge these reports.
Regarding Part B) Please report this separately.

Please only one issue per report. Regarding Part A) This looks like a duplicate of #65585 (Knife Tool fail if camera is too close to the object and mouse away from object), will merge these reports. Regarding Part B) Please report this separately.

Philipp Oeser commented

2020-11-04 10:49:41 +01:00

Closed as duplicate of #65585

Philipp Oeser closed this issue

2020-11-04 10:49:41 +01:00

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Issue with the knife tool #82395