Bug 383271 - Wiggles in strokes size, when pressure size graph is edited (both global and per brush)
Summary: Wiggles in strokes size, when pressure size graph is edited (both global and ...
Status: RESOLVED WORKSFORME
Alias: None
Product: krita
Classification: Applications
Component: General (show other bugs)
Version: git master (please specify the git hash!)
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-08 08:29 UTC by Raghavendra kamath
Modified: 2018-01-26 09:16 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:


Attachments
tablet log (472.95 KB, text/plain)
2017-08-08 08:29 UTC, Raghavendra kamath
Details
Brush preset Used in this test (17.96 KB, image/png)
2017-08-08 08:32 UTC, Raghavendra kamath
Details
Video demonstrating the problem (3.36 MB, video/mp4)
2017-08-08 08:33 UTC, Raghavendra kamath
Details
Screenshot of the jittery lines (128.02 KB, image/png)
2017-08-08 08:34 UTC, Raghavendra kamath
Details

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Description Raghavendra kamath 2017-08-08 08:29:40 UTC
Created attachment 107147 [details]
tablet log

I get wiggles or jitters in size of a brush at higher brush sizes when I edit the size pen pressure graph, default 45 degree line is doesn't give the problem.

the problem can be seen on big brush size and most probably when drawing zoomed in the canvas.

I have attached a video demonstrating the problem, although the stroke in video has less of those jitters, i get varying amount of jitters , i have also attached a screenshot of the same. I am also attaching the brush preset used in this test. Any brush can be used, but to have a consistent test i am attaching the preset here. Tablet log is also attached.

To reproduce:

1) copy the brush preset attached here, Open krita and a new document of A4 300ppi

2) choose the brush preset (pack01_inkbrush_ and xhange the brush diameter to something around 300 to 350 px.

3) Draw across the canvas , make an 'S' may be.

*Actual results*

jitter lines at the beginning of the stroke

*Expected results*

smooth stroke.

This can be reproduced in 4.0 alpha appimage, 3.2rc appimage and also krita built from master.

My tablet driver is libinput 1.8.1-1 , Os is arch linux, graphic driver is Nvidia proprietary 384.59-2. Opengl is enabled.
Comment 1 Raghavendra kamath 2017-08-08 08:32:07 UTC
Created attachment 107148 [details]
Brush preset Used in this test
Comment 2 Raghavendra kamath 2017-08-08 08:33:17 UTC
Created attachment 107149 [details]
Video demonstrating the problem
Comment 3 Raghavendra kamath 2017-08-08 08:34:12 UTC
Created attachment 107150 [details]
Screenshot of the jittery lines
Comment 4 Halla Rempt 2017-11-27 08:38:37 UTC
Hi Raghukamath,

I cannot reproduce this, I'm afraid. Could it be another Qt/libinput/libwacom problem?
Comment 5 Raghavendra kamath 2018-01-26 09:16:11 UTC
For now closing this because it is not reliably reproducibly, if it find it often I may reopen.