Knife tool creates duplicated vertices #52693

New Issue

Szymon Warunek · 2017-09-09T22:04:04+02:00

Szymon Warunek commented

2017-09-09 22:04:04 +02:00

System Information
Windows 8.1 pro Nvidia Geforce Gtx 970{F782457}

Blender 2.79
Broken: (example: 2.69.7 4b206af, see splash screen)
Worked: (optional)

i still have issue with knife tool,i attached my video what is happening to knife tool,when i cut from first edge to another,knife tool duplicates vertices along edges.
i cannot cut my polygonal object,because my knife tool creates duplicated vertices across all edges.

duplicated vertices are created when using knife on certain mesh
Based on a (as simple as possible) attached .blend file with minimum amount of steps
blender 2.79 knife tool duplicated vertices issue.avi

knife tool duplicate vertices issue.blend

knife tool duplicate vertices issue.blend1

**System Information** Windows 8.1 pro Nvidia Geforce Gtx 970{[F782457](https://archive.blender.org/developer/F782457/duplicated__vertices.blend)} ![duplicated vertices.jpg](https://archive.blender.org/developer/F782458/duplicated_vertices.jpg) **Blender 2.79** Broken: (example: 2.69.7 4b206af, see splash screen) Worked: (optional) **i still have issue with knife tool,i attached my video what is happening to knife tool,when i cut from first edge to another,knife tool duplicates vertices along edges. i cannot cut my polygonal object,because my knife tool creates duplicated vertices across all edges.** **duplicated vertices are created when using knife on certain mesh** Based on a (as simple as possible) attached .blend file with minimum amount of steps [blender 2.79 knife tool duplicated vertices issue.avi](https://archive.blender.org/developer/F793264/blender_2.79_knife_tool_duplicated_vertices_issue.avi) ![knife tool duplicate vertices issue.jpg](https://archive.blender.org/developer/F793285/knife_tool_duplicate_vertices_issue.jpg) ![knife tool duplicate vertices issue 3.jpg](https://archive.blender.org/developer/F793287/knife_tool_duplicate_vertices_issue_3.jpg) [knife tool duplicate vertices issue.blend](https://archive.blender.org/developer/F793289/knife_tool_duplicate_vertices_issue.blend) [knife tool duplicate vertices issue.blend1](https://archive.blender.org/developer/F793290/knife_tool_duplicate_vertices_issue.blend1)

Szymon Warunek commented

2017-09-09 22:04:04 +02:00

Changed status to: 'Open'

Szymon Warunek commented

2017-09-09 22:04:04 +02:00

Added subscriber: @szymi

Szymon Warunek commented

2017-09-09 22:05:51 +02:00

i have problem with knife tool,when i try to cut polygonal object from one edge to vertex or face of polygon.Knife tool creates duplicated vertices and it does not always create new edge.

Campbell Barton commented

2017-09-11 09:46:04 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2017-09-11 09:46:04 +02:00

The report has no steps to redo the error, this is needed to investigate.
The file with the problem is not enough.

Note that I tried making some cuts in the mesh and it worked without any problems.

The report has no steps to redo the error, this is needed to investigate. The file with the problem is not enough. Note that I tried making some cuts in the mesh and it worked without any problems.

Szymon Warunek commented

2017-09-12 00:32:52 +02:00

Campbell Barton - what can i do in this case? - What did you do that blender was working without any issues,when you used knife tool.I used and it was creating duplicated vertexes.

Campbell Barton commented

2017-09-12 08:58:23 +02:00

I opened your file and used the knife to cut across faces on the mesh with/without snapping to corner vertices.
Please give an exact list of steps that fail - even if those steps seem obvious to you.

I opened your file and used the knife to cut across faces on the mesh with/without snapping to corner vertices. Please give an exact list of steps that fail - even if those steps seem obvious to you.

Szymon Warunek commented

2017-09-13 00:39:25 +02:00

please see my video,about this issue,i recorded my work by cam studio,to make it easy for you to see what happens when i cut along polygon edge.

ronan ducluzeau commented

2017-09-13 12:00:54 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-09-13 12:00:54 +02:00

It looks like it is relative to View Clipping.
Start value is at 0.001. If you increase it to 0.1 or switch to an orthographic view, knife is working correctly.

It looks like it is relative to View Clipping. Start value is at 0.001. If you increase it to 0.1 or switch to an orthographic view, knife is working correctly.

Szymon Warunek commented

2017-09-13 22:12:38 +02:00

thank you very much! - this setting which is to do with viewport clipping solved my issue with knife tool.

Szymon Warunek commented

2017-09-13 22:13:18 +02:00

please tell other people about this workaround and let other people know about it.

Campbell Barton commented

2017-09-14 07:46:44 +02:00

While this could be made to work better in the knife tool, documenting this as a known limitation:

rBM3766 - https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/knife_subdivide.html#known-limitations

While this could be made to work better in the knife tool, documenting this as a known limitation: rBM3766 - https://docs.blender.org/manual/en/dev/modeling/meshes/editing/subdividing/knife_subdivide.html#known-limitations

Campbell Barton commented

2017-09-14 07:46:53 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2017-09-14 07:46:53 +02:00

Campbell Barton self-assigned this 2017-09-14 07:46:53 +02:00

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Knife tool creates duplicated vertices #52693