Bug 414539

Summary:	Pen tool assistant snap vs. zoom level
Product:	[Applications] krita	Reporter:	soldiumek
Component:	Brush engines	Assignee:	Dmitry Kazakov <dimula73>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	ahab.greybeard, dimula73, halla
Priority:	NOR	Keywords:	triaged
Version First Reported In:	4.2.7.1
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description soldiumek 2019-11-26 14:58:55 UTC

SUMMARY


STEPS TO REPRODUCE
1. I am using two vanishing points and one parallel ruler, to setup 2pt. perspective
2. I do a sketch
3. Then i zoom in and with snapping in pen tool enabled, using pen pressure enabled brush, i draw something with ~150% zoom, the brush works fine.
4. After zooming further to draw details, whenever beyond ~200-250% of zoom, the brush pressure starts to not register properly.
5. Zooming to close decreases pressure registration to the point, where 10px sized brush has problems with leaving any marks on canvas. 

OBSERVED RESULT
Little to no pen pressure detected, ergo no marks on canvas

EXPECTED RESULT
Normal pressure curve, drawing properly using pen tool and assistants while zoomed in.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Windows 10 pro
Krita versions tested: from 4.1 to 4.2.7
High DPI support is enabled
Touch canvas rotation is disabled
Touch canvas panning is enabled

ADDITIONAL INFORMATION
Thinkpad X1 tablet gen 3. (8650V pro variant)
Matte screen protector for some pen grip
Both levnovo pro pen 1 and Waccom bamboo ink plus are affected

Comment 1 Ahab Greybeard 2019-12-05 17:10:09 UTC

I'm not seeing this with 4.2.7.1 on Linux or Windows.

The only thing I notice is that if the Magnetism is set to the maximum value, I have to move the cursor about 10 pixels away from the start point before the line starts to be drawn along the assistant guide line. Opacity variation with pressure works ok at all zoom levels.

This is with a Wacom Draw tablet.

Comment 2 Dmitry Kazakov 2020-06-29 13:02:38 UTC

Hi, soldiumek!

Could you please make a screen recording of the problem? I have followed your steps and couldn't reproduce any problem. The only thing that I could see is 2px delay between the start of the painting, which is the threshold for selecting the assistant that is going to be followed.

PS:
Just a wild guess, perhaps you had a Brush Stabilizer mode active and had "Scalable Distance" checkbox activated? It could cause some weird behavior in Krita before Krita 4.3. Could you test it with Krita 4.3 release? 

https://krita.org/en/item/krita-4-3-0-released/


PPS:
I'll mark the bug as needs-info for now.

Comment 3 Bug Janitor Service 2020-07-14 04:33:11 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 4 Bug Janitor Service 2020-07-29 04:33:13 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!