kicad-developers team mailing list archive

[Seth Hillbrand <seth@xxxxxxxxxxxxx>]

Am 2019-01-03 21:14, schrieb Alex Lockwood:
> I know this is solidly within in realm of minor complaints, but I
> wonder, is there anything "easy" that can be done about this?
>
> https://misc.c4757p.com/fuzzy-wires.png
>
> A simple answer, I think, is to give eeschema and pcbnew separate
> settings for antialiasing (as the sort of things pcbnew renders benefit
> much more from it), but... can anybody explain to someone who doesn't
> know jack about antialiasing algorithms why this happens? The
> corners/junctions "spreading out" so far really strikes me as odd from
> how I understand AA normally working. Are we doing anything...weird?

Hi Alexis-

I had a bug report[1] for separating the preferences.  I've been ok with 
pushing this to later because I have found that supersampling 2x works 
for intermediate purposes.  Not as good as fully-separating but better 
than subpixel in eeschema and better than no anti-aliasing in pcbnew.  
But that might be a combination of my setup, so if you can't find a 
decent joint setting, we should push this back to 5.1

The "spread" you see is generally the result of the Sobel filter doing 
edge-finding.  It looks for contrast differences and mixes the colors 
more where the contrast is lower.  So, around the junctions, there is 
more green, so there is more weight given to the green when mixing.

Best-
Seth

[1] https://bugs.launchpad.net/kicad/+bug/1808067