Mail Archives: geda-user/2016/01/28/06:41:02

X-Authentication-Warning: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
X-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20120113;
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=20130820;
X-Gm-Message-State: AG10YOSe8snB4fHkCRMTZ4rWUmRSC10v+p8nqslSV9f/BJhpifV8RQ40aom4+OM00O90gg==
X-Received: by with SMTP id pk6mr2647735wjb.176.1453981226357;
Thu, 28 Jan 2016 03:40:26 -0800 (PST)
Date: Thu, 28 Jan 2016 12:40:20 +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
Message-Id: <>
In-Reply-To: <>
References: <alpine DOT DEB DOT 2 DOT 00 DOT 1601180756390 DOT 9035 AT igor2priv>
<201601261804 DOT u0QI4KEQ009550 AT envy DOT delorie DOT com>
<E7D351BF-5BBB-41AC-B996-D5E27079A82C AT noqsi DOT com>
<CAC4O8c-ZyNnCzCDHXkYYabSD4fG8vf+CKmhMycNJujGMPKzQDQ AT mail DOT gmail DOT com>
<s6nr3h49hrq DOT fsf AT blaulicht DOT dmz DOT brux>
<DDB07351-7C94-4B5C-99FA-83750CD4592A AT noqsi DOT com>
<20160126233332 DOT dec2f06f5c74354a3841989c AT gmail DOT com>
<s6n1t93h4ub DOT fsf AT blaulicht DOT dmz DOT brux>
<20160127091746 DOT 1c7a976c2752f913921688ac AT gmail DOT com>
<s6npowne74w DOT fsf AT blaulicht DOT dmz DOT brux>
<20160127141334 DOT c738feb9dbeb54a7dec3dff8 AT gmail DOT com>
<s6n37tjt1tv DOT fsf AT falbala DOT ieap DOT uni-kiel DOT de>
<56A8F74B DOT 8080304 AT ecosensory DOT com>
<CAC4O8c9UKLsh5FAAwUMEtHThKH-w3gUmCU2i9dRW9igkyRt-TQ AT mail DOT gmail DOT com>
<CAJZxidDmjMtd_fKvR5qZVRa+hwDUbvfaz79oZjkBgDuE1m8RBg AT mail DOT gmail DOT com>
<56A961BC DOT 3040405 AT ecosensory DOT com>
<CAJZxidC=nbxAinOtpfGHHqwPXbEMrhfat7jKgA9KBp3EVVg4_Q AT mail DOT gmail DOT com>
<s6nbn863xlu DOT fsf AT blaulicht DOT dmz DOT brux>
<56A9E416 DOT 8080500 AT ecosensory DOT com>
X-Mailer: Sylpheed 3.5.0beta1 (GTK+ 2.24.25; x86_64-pc-linux-gnu)
Mime-Version: 1.0
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com

> So, if one generic container of data holds a 2D conductor on insulator pattern, and one holds
> solder mask and one holds top-to-bottom-via connectivity they don't all get talked about as layers or it
> is confusing.

A layer is a flat surface made of particular material for example: copper foil, solder mask, insulating board. To get the necessary geometries on the layers drawing primitives are added there where should be material or cut out of the same drawing primitives to remove material. There are exceptions like the plating on board edges which are on board layer but of a different material but here attribute/flag/property to tell it should be plated is good enough although an extra layer to model the second material would also be possible.

There is a need for containers or similar to group drawing primitives into via/pad/pin, element/footprint, maybe sub layout so they could be handled by the user. If you look at gerber output of via/pin/pad/element/footprint you will see result is a bunch of drawing primitives on different layers.

Nicklas Karlsson

- Raw text -

  webmaster     delorie software   privacy  
  Copyright 2019   by DJ Delorie     Updated Jul 2019