Hej Stylus! (Tablet configuration tool) and Blender issues #82143

New Issue

Eilert Janßen · 2020-10-27T14:28:22+01:00

Eilert Janßen commented

2020-10-27 14:28:22 +01:00

Operating system: macOS 10.15.6
Graphics card: NVIDIA GeForce GT 750M 2 GB
Intel Iris Pro 1536 MB
Wacom Tablet, Intros Pro, or Cintiq 24 HD f.i.

Broken: Version 2.91.0 2020-10-25

Eilert from Hej Stylus! writing. Hej Stylus! is a tool that smoothes tablet output amongst other features.
Hej Stylus! pulls live tablet event data and re-infuses altered events back into the macOS event stream using:

CGEvent.tapCreate(tap: .cgSessionEventTap,

                                   place: .headInsertEventTap,
                                   options: .defaultTap,
                              ...

Using any of Hej Stylus!' position smoothing algos creates cursor issues in blender - on tablet use only. Mouse is not affected.
Using Tablet devices causes blender to 'use' both events - although Hej Stylus! is overwriting the tablet events.
We do wonder if you use any functions that force blender to process information directly from a hardware i/O source of some sorts.
Maybe blender also creates events by itself ..
We hope that you might shed some light on how you process incoming events from tablet devices so that we can find a workaround.

Exact steps for others to reproduce the error
1.) To test this issue goto: hejstylus.com and grab the latest version.
2.) Use a graphics tablet
3.) Use a smoothing algorithm (as seen in screenshot)
4.) Draw some annotations with blenders annotation tool f.i.positionalIssues.blend

Operating system: macOS 10.15.6 Graphics card: NVIDIA GeForce GT 750M 2 GB Intel Iris Pro 1536 MB Wacom Tablet, Intros Pro, or Cintiq 24 HD f.i. Broken: Version 2.91.0 2020-10-25 Eilert from Hej Stylus! writing. Hej Stylus! is a tool that smoothes tablet output amongst other features. Hej Stylus! pulls live tablet event data and re-infuses altered events back into the macOS event stream using: CGEvent.tapCreate(tap: .cgSessionEventTap, ``` place: .headInsertEventTap, options: .defaultTap, ... ``` Using any of Hej Stylus!' position smoothing algos creates cursor issues in blender - on tablet use only. Mouse is not affected. Using Tablet devices causes blender to 'use' both events - although Hej Stylus! is overwriting the tablet events. We do wonder if you use any functions that force blender to process information directly from a hardware i/O source of some sorts. Maybe blender also creates events by itself .. We hope that you might shed some light on how you process incoming events from tablet devices so that we can find a workaround. **Exact steps for others to reproduce the error** 1.) To test this issue goto: hejstylus.com and grab the latest version. 2.) Use a graphics tablet 3.) Use a smoothing algorithm (as seen in screenshot) 4.) Draw some annotations with blenders annotation tool f.i.[positionalIssues.blend](https://archive.blender.org/developer/F9110805/positionalIssues.blend) ![blender+hej.png](https://archive.blender.org/developer/F9110804/blender_hej.png)

Eilert Janßen commented

2020-10-27 14:28:22 +01:00

Added subscriber: @Eilert

Brecht Van Lommel commented

2020-10-27 15:31:32 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2020-10-27 15:31:32 +01:00

The relevant code is in intern/ghost/intern/GHOST_SystemCocoa.mm.

I suspect it's due to the use of [cocoawindow mouseLocationOutsideOfEventStream] to get the mouse position, introduced in 12b6420, for this reason:

OSX: fixed bug that stopped giving mouse events outside window. This also fixes "Continuous Grab" for OSX. (error since 2009)

Even disregarding this bug report, mixing the state at the time of the event and current state this way should be avoided, getting rid of that in other places has fixed bugs.

I imagine it's possible to get the mouse location outside of the window from the event in another way.

The relevant code is in `intern/ghost/intern/GHOST_SystemCocoa.mm`. I suspect it's due to the use of `[cocoawindow mouseLocationOutsideOfEventStream]` to get the mouse position, introduced in 12b6420, for this reason: ``` OSX: fixed bug that stopped giving mouse events outside window. This also fixes "Continuous Grab" for OSX. (error since 2009) ``` Even disregarding this bug report, mixing the state at the time of the event and current state this way should be avoided, getting rid of that in other places has fixed bugs. I imagine it's possible to get the mouse location outside of the window from the event in another way.

Eilert Janßen commented

2020-10-27 17:21:01 +01:00

This comment was removed by @Eilert

*This comment was removed by @Eilert*

Ankit Meel commented

2020-10-28 09:44:01 +01:00

Added subscriber: @ankitm

Ankit Meel commented

2020-10-28 09:44:01 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Ankit Meel commented

2020-10-28 09:44:01 +01:00

Even disregarding this bug report, mixing the state at the time of the event and current state this way should be avoided, getting rid of that in other places has fixed bugs.

> Even disregarding this bug report, mixing the state at the time of the event and current state this way should be avoided, getting rid of that in other places has fixed bugs.

blender-admin commented

2020-10-29 22:15:05 +01:00

This issue was referenced by 9e85812acc

This issue was referenced by 9e85812acc88fa469aecccb1d5ed3e28e362278a

Brecht Van Lommel commented

2020-10-29 22:59:22 +01:00

I committed a possible fix for this. It will be in the next 2.91.0 build on https://builder.blender.org/download/.

Brecht Van Lommel commented

2020-10-30 16:50:24 +01:00

Changed status from 'Confirmed' to: 'Needs User Info'

Stas Haas commented

2020-11-03 13:58:58 +01:00

Added subscriber: @girafic

Stas Haas commented

2020-11-03 13:58:58 +01:00

Thx @brecht. It's working fine now.

Bildschirmvideo aufnehmen 2020-11-03 um 13.54.01.mp4

Thx @brecht. It's working fine now. [Bildschirmvideo aufnehmen 2020-11-03 um 13.54.01.mp4](https://archive.blender.org/developer/F9180724/Bildschirmvideo_aufnehmen_2020-11-03_um_13.54.01.mp4)

Brecht Van Lommel commented

2020-11-03 15:39:15 +01:00

Changed status from 'Needs User Info' to: 'Resolved'

Brecht Van Lommel closed this issue

2020-11-03 15:39:15 +01:00

Brecht Van Lommel self-assigned this 2020-11-03 15:39:15 +01:00

Brecht Van Lommel commented

2020-11-03 15:39:15 +01:00

Great, I'll consider this solved then.

Eilert Janßen commented

2020-11-04 14:18:10 +01:00

Dear Brecht,
I've double checked on V2.91.0 Beta and can confirm that the issue is solved.
Thank you very much for the swift solution!
Best regards, Eilert

Dear Brecht, I've double checked on V2.91.0 Beta and can confirm that the issue is solved. Thank you very much for the swift solution! Best regards, Eilert

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Hej Stylus! (Tablet configuration tool) and Blender issues #82143