Anti-aliasing & edge selection

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Anti-aliasing & edge selection

Postby optimaforever » Sun Oct 22, 2017 11:30 am

Hi Thomas,

I have sometimes problems trying to visualize selected edges, as with anti-aliasing SU tends to merge black lines and red selected lines. If I choose no anti-aliasing, or low anti-aliasing (2x, 4x), the selection is visible (red lines are fatter than black lines) but if I select 16x anti-aliasing, the red selection are barely visible.

So my question is:
Is it possible to change the width of the red (selected) edges? Btw I have the same issue with selected seam visibility with WrapR so I guess it's a SU thing...

Thanks in advance,
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Re: Anti-aliasing & edge selection

Postby rv1974 » Sun Oct 22, 2017 1:11 pm

Printscreens?
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Re: Anti-aliasing & edge selection

Postby optimaforever » Sun Oct 22, 2017 2:11 pm

Here are some printscreens as asked. :)

btw I never use profile lines in SU (except for good-looking final outputs, but never during modeling)
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Re: Anti-aliasing & edge selection

Postby rv1974 » Sun Oct 22, 2017 2:57 pm

Be more specific. what do you mean by 'trying visualize edges'? What's your aim?
Are you trying to make all edges black, same width?
Have you used some dedicated plugins Wrapr, color edges by direction etc?
check edges colorization in your style, if its 'by material'- switch to 'all the same'.
And it's not so bad idea to post your .skp file (a part?) ;)
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Re: Anti-aliasing & edge selection

Postby optimaforever » Sun Oct 22, 2017 5:51 pm

rv1974 wrote:Be more specific. what do you mean by 'trying visualize edges'? What's your aim?
Are you trying to make all edges black, same width?
Have you used some dedicated plugins Wrapr, color edges by direction etc?
check edges colorization in your style, if its 'by material'- switch to 'all the same'.
And it's not so bad idea to post your .skp file (a part?) ;)


Don't you see that some edges are a mix of red and black?
The 2 examples show the exact same selection, but differ from an anti-aliasing point.

Above, on the AA4x, you can clearly see what is red and what is black (selected vs unselected), as it is supposed to be. Yet, according to the geometry, sometimes the red gets hidden under the geometry, dunno why. If you use a line only mode (F2), you can understand if an edge is red or not, but it's not always confortable to work in line mode.

Beneath, on the AA16x, some (supposed to be) selected edges are red AND black, and on some parts the red fades to black, some edges look even black even though they are selected.

I can't even imagine the struggle on 4k screens (I use FullHD only).
So for my understanding, there is an OpenGL fight between the red and black line, which is enhanced by the anti-aliasing. Then a solution could be to make the selected red line thicker?
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Re: Anti-aliasing & edge selection

Postby rv1974 » Sun Oct 22, 2017 7:02 pm

overlapping geometry?
what happens when you bring back default blue? Update\downgrage your grivers.
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Re: Anti-aliasing & edge selection

Postby optimaforever » Mon Oct 23, 2017 7:10 am

rv1974 wrote:overlapping geometry?
what happens when you bring back default blue? Update\downgrage your grivers.

Nope. it's not overlapping geometry unless Thom says otherwise.
It's clearly related to the OpenGL support of SketchUp, because WrapR suffers the same symptoms.
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Re: Anti-aliasing & edge selection

Postby thomthom » Mon Oct 23, 2017 9:22 am

Hm... What graphic card and driver are you using?
What is your screen resolution?
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Re: Anti-aliasing & edge selection

Postby optimaforever » Mon Oct 23, 2017 10:49 am

Renderer: GeForce GTX TITAN X/PCIe/SSE2
GL version: 4.5.0 NVIDIA 382.05
Pixel Format: DBL RGBA:8-8-8-8 Depth: 24 Stencil:8 MSAA:16 FF:1
Res: 1920x1200
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Re: Anti-aliasing & edge selection

Postby thomthom » Mon Nov 06, 2017 11:47 am

Hm.. I'm not able to reproduce this:

2017-11-06_11h45_19.png
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Re: Anti-aliasing & edge selection

Postby thomthom » Mon Nov 06, 2017 11:48 am

Maybe it's model specific... can you share a model?
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