Knife Tool. No preview dot of where the cut will start. #67898

New Issue

Eugene Kostyuk · 2019-07-29T19:46:38+02:00

Eugene Kostyuk commented

2019-07-29 19:46:38 +02:00

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.60

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-28 15:07, hash: a49838ccb0
Worked: (optional)

When activating a knife tool, the preview dot of where the cut will begin does not show up. So i do not know if the cut will begin on a face, or on an edge, and i can't see if it snaps to a vertex, etc. I can see all of this only when i actually begin a cut.
A desirable behavior is when i activate a knife operation with "k" key.

Create a cube. Enter edit mode. Select a knife tool. Point it on a mesh. There is no green dot projected on mesh, indicating where the cut will start.
On the other hand, when in edit mode, press "k" and you immediately see where the cut will start, and if ctrl is pressed - to which place it snaps.Knife_Tool_cube.blend
[Based on the default startup or an attached .blend file (as simple as possible)]

**System Information** Operating system: Windows-10-10.0.17134 64 Bits Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.60 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-28 15:07, hash: `a49838ccb0` Worked: (optional) When activating a knife tool, the preview dot of where the cut will begin does not show up. So i do not know if the cut will begin on a face, or on an edge, and i can't see if it snaps to a vertex, etc. I can see all of this only when i actually begin a cut. A desirable behavior is when i activate a knife operation with "k" key. Create a cube. Enter edit mode. Select a knife tool. Point it on a mesh. There is no green dot projected on mesh, indicating where the cut will start. On the other hand, when in edit mode, press "k" and you immediately see where the cut will start, and if ctrl is pressed - to which place it snaps.[Knife_Tool_cube.blend](https://archive.blender.org/developer/F7636146/Knife_Tool_cube.blend) [Based on the default startup or an attached .blend file (as simple as possible)]

👍 1

Eugene Kostyuk commented

2019-07-29 19:46:38 +02:00

Added subscriber: @EugeneKostyuk

blender-admin commented

2019-07-29 19:46:38 +02:00

#73874 was marked as duplicate of this issue

blender-admin commented

2019-07-29 19:46:38 +02:00

#77483 was marked as duplicate of this issue

William Reynish commented

2019-07-29 23:02:45 +02:00

Added subscribers: @ideasman42, @WilliamReynish

Campbell Barton was assigned by William Reynish

2019-07-29 23:02:45 +02:00

William Reynish commented

2019-07-29 23:02:46 +02:00

This is missing currently, and makes the Knife tool difficult to use as an active tool.

@ideasman42 Do you have a solution in mind for this?

This is missing currently, and makes the Knife tool difficult to use as an active tool. @ideasman42 Do you have a solution in mind for this?

Eugene Kostyuk commented

2019-07-29 23:41:55 +02:00

I am no programmer, and there might be a reason for such behavior, but i would expect that a knife tool at it's current state would work like a knife operation without a need to reactivate it after each confirmed cut.
Right now, it seems that a knife tool,when selected, is not activated. As i see it, it's functions are "turned on" after the first click, and "turn off" after cut confirmation (at least visually). I would suggest that they always be "on".
Can't imagine a situation where i would not want to see a place on a mesh where i'm going to cut).
Hope that helps somehow).
Thank you.

I am no programmer, and there might be a reason for such behavior, but i would expect that a knife tool at it's current state would work like a knife operation without a need to reactivate it after each confirmed cut. Right now, it seems that a knife tool,when selected, is not activated. As i see it, it's functions are "turned on" after the first click, and "turn off" after cut confirmation (at least visually). I would suggest that they always be "on". Can't imagine a situation where i would not want to see a place on a mesh where i'm going to cut). Hope that helps somehow). Thank you.

William Reynish commented

2019-07-30 18:09:10 +02:00

This could be considered a tool gizmo todo, since I assume this has to use the gizmo system.

Yuri commented

2019-10-16 09:55:11 +02:00

Added subscriber: @YanDaik

Yuri commented

2019-10-16 09:55:11 +02:00

This comment was removed by @YanDaik

*This comment was removed by @YanDaik*

The Fumbler commented

2020-04-29 01:01:26 +02:00

Added subscriber: @theFumbler

The Fumbler commented

2020-04-29 01:01:26 +02:00

I also have the same exact issue. If I select the knife tool, there is no green dot to tell me where first point will be. And as the original poster reported, if I press the letter K, then a green dot will appear allowing me to see where the first point will be.

NVIDIA GeForce GTX-960 with most current driver
Blender v2.82.7

I also have the same exact issue. If I select the knife tool, there is no green dot to tell me where first point will be. And as the original poster reported, if I press the letter K, then a green dot will appear allowing me to see where the first point will be. NVIDIA GeForce GTX-960 with most current driver Blender v2.82.7

Campbell Barton commented

2020-04-29 03:03:53 +02:00

Added subscriber: @mano-wii

Campbell Barton commented

2020-04-29 03:03:53 +02:00

In #67898#739054, @WilliamReynish wrote:
This is missing currently, and makes the Knife tool difficult to use as an active tool.

@ideasman42 Do you have a solution in mind for this?

@mano-wii has written on a generic snap system that will be used for tools which need to start off snapping, the same solution can be used here: D7071: Ruler: New Snap Gizmo and its use in the Ruler tool

> In #67898#739054, @WilliamReynish wrote: > This is missing currently, and makes the Knife tool difficult to use as an active tool. > > @ideasman42 Do you have a solution in mind for this? @mano-wii has written on a generic snap system that will be used for tools which need to start off snapping, the same solution can be used here: [D7071: Ruler: New Snap Gizmo and its use in the Ruler tool](https://archive.blender.org/developer/D7071)

Germano Cavalcante commented

2020-06-08 16:52:48 +02:00

Added subscriber: @Vyach

M commented

2020-09-20 22:38:31 +02:00

Added subscriber: @justastatue

Javier León commented

2020-11-18 19:06:16 +01:00

Added subscriber: @javierleonpa

Javier León commented

2020-11-18 19:06:16 +01:00

Hi I have the same issue but I fixed putting the view clip far at normal values (1000 ) it's works to me if I put big values at view clip end the knife tool doesn't works

林虎 commented

2021-02-01 02:54:26 +01:00

Added subscriber: @Werk

林虎 commented

2021-02-01 02:54:26 +01:00

In #67898#1057253, @javierleonpa wrote:
Hi I have the same issue but I fixed putting the view clip far at normal values (1000 ) it's works to me if I put big values at view clip end the knife tool doesn't works

i also found the same problem,when i set view Clip start 0.001m - End 100000M,knife will invalidation

> In #67898#1057253, @javierleonpa wrote: > Hi I have the same issue but I fixed putting the view clip far at normal values (1000 ) it's works to me if I put big values at view clip end the knife tool doesn't works i also found the same problem,when i set view Clip start 0.001m - End 100000M,knife will invalidation

Germano Cavalcante commented

2021-04-17 19:07:36 +02:00

Added subscribers: @x-zay, @PratikPB2123, @LeoSch, @Schiette, @DuarteRamos

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Knife Tool. No preview dot of where the cut will start. #67898