[Gwyddion-users] Windows version 3D view bug

[Peter Eaton]

Hi, strange that it cannot reproduced.I can reproduce it on at least 3 computers. These are running windows 7 and 10. It *only* happens when 3D window is maximised.
Last month I ran a class on data processing, and about 20% of the student's reports had this effect in their images.Yes, perhaps removing the "preview mode" completely will fix this and not impact performance too much.Pete.
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Atomic Force Microscopy
Dr Peter Eaton and Dr Paul West
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[Andrés Muñiz Piniella]

Post by Peter Eaton
Hi, strange that it cannot reproduced.I can reproduce it on at least 3
computers. These are running windows 7 and 10. It *only* happens when
3D window is maximised.
Last month I ran a class on data processing, and about 20% of the
student's reports had this effect in their images.Yes, perhaps removing
the "preview mode" completely will fix this and not impact performance
too much.Pete.

Could it be a graphics card issue? Are the 20% the same brand of computer? The windows computers I used it with that work are Dell.

We still have computers with low resources so if the preview mode is deactivated, could it be opt-in rather than opt out?

[David Nečas (Yeti)]

Post by Andrés Muñiz Piniella
Could it be a graphics card issue? Are the 20% the same brand of
computer? The windows computers I used it with that work are Dell.

There is certainly some bad interaction with the graphics drivers...

Post by Andrés Muñiz Piniella
We still have computers with low resources so if the preview mode is
deactivated, could it be opt-in rather than opt out?

I tried to disable the downsampling on my 4 years old notebook running
the default Linux X11 drivers for ‘no bloody idea what graphics card I
have’ (until I looked it up). No noticeable difference with ~1000px
images. With ~2000px images changing modes/palettes/materials was slow,
but scaling, rotation, etc. was still fine.

So I really do not think you need some high-end graphics workstation for
these things nowadays. From 2004's perspective, everything is a
high-end graphics workstation now.

But maybe I am utterly mistaken.

There is only one way to find out.

I changed the downsampling not to actually downsample anything (in
r17796). So starting from tomorrow's snapshot the 3D view will be
effectively a lot slower than if we killed the downsampling outright
because it will be doing everything twice – once for the ‘preview’,
which is now of the same size as the final rendering, and once for the
final rendering as usual.

Please test.

Ccing the -devel list to increase the potential number of people who may
give useful remarks.

Regards,

Yeti