Knife cut fails at different scales (float precision) #42459

New Issue

Erick Tukuniata · 2014-10-31T21:43:33+01:00

Erick Tukuniata commented

2014-10-31 21:43:33 +01:00

System Information
Operating system and graphics card
win 7 nvidia 550 ti
Blender Version
Broken: (example: 2.69.7 4b206af, see splash screen) blender 2.72 625843d
Worked: (optional) I don't know

Short description of error
While using the knife cut i may be pressed some buttons by mistake and now the knife cut tools have a lot of red dot that follow my direction and when i cut anyway, i got triangles all over the place. Did i corrupt this file?

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

shoe_1.blend
In the .blend file hit k and LMB click and there you go ...

@ideasman42 (noting)
attaching another file from #42864 . Its related to scale (use knife project)
project_knf_2.blend

**System Information** Operating system and graphics card win 7 nvidia 550 ti **Blender Version** Broken: (example: 2.69.7 4b206af, see splash screen) blender 2.72 625843d Worked: (optional) I don't know **Short description of error** While using the knife cut i may be pressed some buttons by mistake and now the knife cut tools have a lot of red dot that follow my direction and when i cut anyway, i got triangles all over the place. Did i corrupt this file? **Exact steps for others to reproduce the error** Based on a (as simple as possible) attached .blend file with minimum amount of steps [shoe_1.blend](https://archive.blender.org/developer/F120825/shoe_1.blend) In the .blend file hit k and LMB click and there you go ... ---- @ideasman42 (noting) attaching another file from #42864 . Its related to scale (use knife project) [project_knf_2.blend](https://archive.blender.org/developer/F131971/project_knf_2.blend)

Erick Tukuniata commented

2014-10-31 21:43:33 +01:00

Changed status to: 'Open'

Bastien Montagne was assigned by Erick Tukuniata

2014-10-31 21:43:33 +01:00

Erick Tukuniata commented

2014-10-31 21:43:33 +01:00

Added subscriber: @ErickNyanduKabongo

Campbell Barton commented

2014-10-31 22:32:20 +01:00

Added subscriber: @ideasman42

Campbell Barton commented

2014-10-31 22:32:20 +01:00

It looks like we could support this however - the object is ~0.005 dimensions, causing precision issues.

Erick Tukuniata commented

2014-11-01 00:34:46 +01:00

Thanks after reading this i scaled it and problem solved, I started this mode without ref. image and with just a vertex that why the scale was off.

Bastien Montagne removed their assignment 2014-11-01 14:53:07 +01:00

Bastien Montagne commented

2014-11-01 14:53:07 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2014-11-01 14:53:07 +01:00

@ErickNyanduKabongo please only assign bugs yourself if you are really sure you know to whom you should assign…

Campbell, not really sure we can do much about such issues currently… Esp. since it's again in ortho view (persp one seems to work OK here afaict), raycasting in ortho has always been kind of a nightmare. :/

@ErickNyanduKabongo please only assign bugs yourself if you are **really** sure you know to whom you should assign… Campbell, not really sure we can do much about such issues currently… Esp. since it's again in ortho view (persp one seems to work OK here afaict), raycasting in ortho has always been kind of a nightmare. :/

Erick Tukuniata commented

2014-11-02 15:45:11 +01:00

Sorry Mont29,
I was thinking that the modeling section is you and Campbell but eventually i m wrong. Tell me to whom to assign this kind of bug so that next time i can do it right.

Sorry Mont29, I was thinking that the modeling section is you and Campbell but eventually i m wrong. Tell me to whom to assign this kind of bug so that next time i can do it right.

Sergey Sharybin commented

2014-11-04 14:19:42 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-11-04 14:19:42 +01:00

@ideasman42, wouldn't really consider it a bug and will move to TODO. Murphy will always ensure you've got just one ore precision issue if you solve all known onces :)

Campbell Barton was assigned by Sergey Sharybin

2014-11-04 14:19:59 +01:00

Campbell Barton changed title from ~~Knife cut strange behavior~~ to Knife cut fails at different scales (float precision)

2014-12-16 10:31:00 +01:00

Julian Eisel commented

2015-01-13 12:13:21 +01:00

Added subscriber: @JulianEisel

Julian Eisel commented

2015-01-13 12:13:21 +01:00

Should be fixed by b77dd13004 (tested on my own).

Should be fixed by b77dd13004 (tested on my own).

Julian Eisel commented

2015-01-13 12:13:30 +01:00

Changed status from 'Open' to: 'Resolved'

Julian Eisel closed this issue

2015-01-13 12:13:30 +01:00

Campbell Barton commented

2015-01-13 14:53:04 +01:00

Changed status from 'Resolved' to: 'Open'

Campbell Barton reopened this issue

2015-01-13 14:53:04 +01:00

Campbell Barton commented

2015-01-13 14:53:04 +01:00

Not so fast :)

While it can almost cut correctly, there is a precission problem where the knife cuts all the way through the ants-boots (occlude faces fails).

Not so fast :) While it can almost cut correctly, there is a precission problem where the knife cuts all the way through the *ants-boots* (occlude faces fails).

blender-admin commented

2015-01-13 15:36:03 +01:00

This issue was referenced by a97c5d1f9f

This issue was referenced by a97c5d1f9f7ec71807763c2f28f095bf37f0c230

Campbell Barton commented

2015-01-13 15:37:48 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2015-01-13 15:37:48 +01:00

Campbell Barton commented

2015-01-13 15:37:48 +01:00

Closed by commit a97c5d1f9f.

Closed by commit a97c5d1f9f.

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Knife cut fails at different scales (float precision) #42459