Start/End Caps can produce strange visual ‘aberrations’ at different zoom levels.

[GarryP]

See attached video where I zoom in and out with a simple curve, first without an end cap (looks fine), then with an end cap (looks weird).

I searched the Windows bugs section for end cap but didn’t find anything similar.

[stokerg]

Hi @GarryP,

I think this is just a redraw issue.  When i try this on my Windows laptop, i get the issue for a brief second and then it corrects itself.  I also tried this on another PC which showed the issue better and didn't correct itself but on selecting that Curve and using Layer>Expand Stoke or Rasterise, the issue then disappears.  As does simply zooming in or out again.  If you Rasterise or Expand Stroke on that curve when it shows glitches, do they disappear or are they still present?  If still present, please attach your afdesign file.

[GarryP]

I managed to see the same problem in two new documents on the day but unfortunately I can’t seem to replicate it today, no matter how much I try.

I’m happy to chalk this one up as ‘just one of those things’.

[Hangman]

FWIW, I see the same screen redraw behaviour on both Windows and Mac regardless of whether Hardware Acceleration is enabled or not...

[GarryP]

For some reason I’m not seeing the problem today.

I wonder if it’s because I haven’t had Designer open for hours like I had when I saw the problem.

[Hangman]

I can replicate it if I zoom out and then slowly zoom in on both Windows and Mac even after an App reboot to test whether Hardware Acceleration made any difference so I don't think that's the issue...

[GarryP]

I see that I originally posted on a Friday, so maybe I’ll have to try it again this Friday, just to see if that’s the cause.

Ah, no, hang on a sec...

I’ve just noticed that in my video I was using an A4 document where the stroke size was measured in mm, whereas my later testing was done in a FHD document where the UOM was in pixels.

@stokerg I tried to replicate the problem, with a clean launch of Designer, with an A4 document (attached) and the problem is back.

Using Expand Stroke on the curve works as expected and the result looks fine (apart from the ‘end cap overlay thing’ which is already known about).

end-cap-zoom-issue.afdesign

[stokerg]

Hi @GarryPand @Hangman,

I've just logged this with the Developers