kicad-developers team mailing list archive

["Jon Evans" <jon@xxxxxxxxxxxxx>]

Hi Seth,

If we need to store the value to control plotting as part of board settings (option 2), which makes sense to me, what is the advantage of storing a different value in user settings (3)? 

-Jon

On Thu, May 16, 2019, at 1:30 PM, Seth Hillbrand wrote:
> Am 2019-05-16 08:44, schrieb Seth Hillbrand:
> > Am 2019-05-16 08:31, schrieb Wayne Stambaugh:
> >> Seth,
> >> 
> >> I took a look at this and it looks fine to me. Refresh my memory, is
> >> this change to reduce the number of arc segments to help address the
> >> performance issues on complex boards or is this change for some other
> >> reason?
> > 
> > Correct, this reduces the complexity of boards by reducing the number
> > of segments needed to approximate small radius curves.
> > 
> 
> 
> Hi All-
> 
> The next step in this is to remove the segment count setting from the 
> file format. I have a baseline patch for this pushed to my segments 
> branch at [1]. As this is a file format change, it makes sense to think 
> about whether we want to add a an option for the board maximum error at 
> the same time.
> 
> Currently, we use 0.005mm as the maximum error for most items. This 
> includes approximating arcs, inflating/deflating for clearances and 
> converting items to polygons for plotting. It may make sense to make 
> this value a setting that is stored. There are a few options I see:
> 
> 1) Put the value in the board file directly. This might make sense 
> because it is used to figure out the copper fills that are stored in the 
> file. But the value itself doesn't directly alter the physical aspect 
> of the board.
> 
> 2) Put the value in the board settings. This would be alongside things 
> like layer visibility and plot settings.
> 
> 3) Put the value in the user settings. This would be alongside things 
> like anti-alias settings.
> 
> If we go with option (3), we could have a separate value that controls 
> the plot output settings stored like (2) so that two users working on 
> the same board would get the same output.
> 
> 
> 
> Thoughts?
> -Seth
> 
> [1] https://code.launchpad.net/~sethh/kicad/+git/kicad/+ref/segments
> 
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