Black background on constraints
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Black background on constraints
This black background looks something wrong for me.
Is this a new feature or a bug?
OS: Ubuntu 20.04 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.21280 (Git) AppImage
Build type: Release
Branch: master
Hash: 6f3160db3e88733536c7eaf97ad7d6ebd21baccd
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)
Is this a new feature or a bug?
OS: Ubuntu 20.04 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.21280 (Git) AppImage
Build type: Release
Branch: master
Hash: 6f3160db3e88733536c7eaf97ad7d6ebd21baccd
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)
Re: Black background on constraints
It tends to appear sometimes. It disappears by itself. It seems to be a "bug" but not a serious one. Some sort of rendering artifact.
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Re: Black background on constraints
Werner commented on this. It seems to be that some display buffers run out of memory and use some fallback solution.
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Re: Black background on constraints
I haven't seen this, but I have seen on occasion all the points in a sketch turn black. Sometimes when it happens it goes away by zooming in and out.
Re: Black background on constraints
hi, i found same problem when selected render :
edit ▻preferences ▻ Display ▻ render : Anti-aliasing : Line Smooth
but selected "MSAA 2X~8X" will not happen.
you can try it.
edit: forgotten to say that test in arch linux 5.12.15, freecad 0.19 with intel uhd620
and i test again, if a saved file that it's drawing has the problem, changed anti-aliasing to other can display as normal.
if a saved file made a drawing that original display as normal, changed to 'Line Smooth' not reproduce black background problem.
edit ▻preferences ▻ Display ▻ render : Anti-aliasing : Line Smooth
but selected "MSAA 2X~8X" will not happen.
you can try it.
edit: forgotten to say that test in arch linux 5.12.15, freecad 0.19 with intel uhd620
and i test again, if a saved file that it's drawing has the problem, changed anti-aliasing to other can display as normal.
if a saved file made a drawing that original display as normal, changed to 'Line Smooth' not reproduce black background problem.
- Shalmeneser
- Veteran
- Posts: 9558
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- Location: Fr
Re: Black background on constraints
It tends to appear sometimes.
It disappears by itself.
Sometimes when it happens it goes away by zooming in and out.
I confirm.
It disappears by itself.
Sometimes when it happens it goes away by zooming in and out.
I confirm.
Re: Black background on constraints
Chrisb, do you know something that we can do to check this statement (where the buffers run out off memory) when I see this black-bg issue again?
I am not seeing this issue anymore.
My machine has a lot of RAM (32GB), maybe this is not the problem for me, unless the display uses a different, less available memory or maybe that time I was running to many things at the same time.
Last edited by leoheck on Mon Aug 16, 2021 2:01 am, edited 2 times in total.
Re: Black background on constraints
I don't know how to provoke the phenomenon, but I haven't seen it for quite some time. Perhaps the different library versions used have improved the situation.leoheck wrote: ↑Sun Aug 15, 2021 7:11 pm Chrisb, do you know something that we can do to check this statement when we see this black-bg issue? I am not seeing anymore anymore. My machine has a lot of RAM (32GB), maybe this is not the problem for me, unless the display uses a different, less available memory or maybe that time I was running to many things at the same time.
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Re: Black background on constraints
As commented kevin_fc, this problem appears if selected "Line Smooth" anti-aliasing mode:
Edit>Preferences>Display>Rendering: Anti-aliasing=Line Smooth
After setting to another mode - problem disappears.
My system:
Linux Mint 19.1 (Mate desktop), 4.15.0-158
VGA Intel UHD 630
FreeCAD 0.19 (14555)
Edit>Preferences>Display>Rendering: Anti-aliasing=Line Smooth
After setting to another mode - problem disappears.
My system:
Linux Mint 19.1 (Mate desktop), 4.15.0-158
VGA Intel UHD 630
FreeCAD 0.19 (14555)
Re: Black background on constraints
Can you please retry in 0.20?
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