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	Wed, 27 Jan 2016 09:27:18 -0800 (PST)
Date:	Wed, 27 Jan 2016 18:27:15 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] The nature of gEDA layers
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> On 01/27/2016 10:38 AM, Stephan Böttcher wrote:
> >> There is no via layer,
> > Yes there is, in my proposeal.
> >
> >> >a via is a composite of objects on different layers.
> > That is true.  Including the layer that tells what is conductively
> > connected.
> 
> This needed a new subject line.
> 
> How about my proposal of the previous email, "layers correspond and represent physical planar layers,
> and outline is a special mask layer that acts on physical layers.  Via could also be in the mask layer
> category -- mask layers "act on" physical definition layers...
> 
> I'd like to call them that way --
> mask layers
> physical definition layers
> 
> John Griessen

No. A layer is made of a flat material. It is possible to draw there where should be material and cut outs there material should be removed. Gerber files work in a similar fashion.

Plate thru does however not really follow this model but if there really is a need to draw second material on same layer I guess the most appropriate would be an extra layer at same position/group.

Nicklas Karlsson

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