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Date: Thu, 7 Jan 2016 01:03:09 +0100
Message-ID: <CACwWb3CozuiSvi-84_oNrVPfmCYgxFB1-piJrVa59d7eOkd2xw@mail.gmail.com>
Subject: Re: [geda-user] A fileformat library
From: "Levente (leventelist AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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That would be nice. Somewhere in the website? Somewhere in the repository?
DJ?
On 7 Jan 2016 00:46, "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via
geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:

> > > > I recently did a tiny bit of work on the parser in pcb.  Of course we
> > > > should continue to support it, but it's going to be tough to extend
> it
> > > > much.  It's already overloaded in weird ways (e.g. thermals are
> parsed as
> > > > flags, with their own non-flex sub-syntax, even though they don't
> set any
> > > > actual flags).  If you do extend it you do hard work and still only
> pcb
> > > can
> > > > read it.  Of course you still have to teach the innards of pcb about
> your
> > > > extensions in order for them to do anything useful.
> > >
> > > A good start might be to write down what need to be stored even though
> > > they are not implemented right now and maybe never will be:
> > >   1. Padstack, probably as collection of ordinary drawing primitives.
> > >   2. Local copy and reference so update is possible.
> > >   3. Net and possible segment attribute for route style, width.
> > >   4. Net clerances between any net.
> > >   5. Net clerance classes although (4.) could be extended before
> entering
> > > pcb.
> > >   6. Trace impedance.
> > >   7. Differential impedance?
> > >   8. Pin swapping!
> > >   9. Slot swapping.
> > >
> >
> > Lev did something very like this last time this got discussed as sql
> > schema.  I don't think it had all the above but some of it.
> >
> > Britton
>
> I wrote down some more in a text files. Would it be possible collect them
> somewhere there everybody could read them?
>
>
> Nicklas Karlsson
>

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<p dir=3D"ltr">That would be nice. Somewhere in the website? Somewhere in t=
he repository? DJ?</p>
<div class=3D"gmail_quote">On 7 Jan 2016 00:46, &quot;Nicklas Karlsson (<a =
href=3D"mailto:nicklas DOT karlsson17 AT gmail DOT com">nicklas DOT karlsson17 AT gmail DOT com</=
a>) [via <a href=3D"mailto:geda-user AT delorie DOT com">geda-user AT delorie DOT com</a>=
]&quot; &lt;<a href=3D"mailto:geda-user AT delorie DOT com">geda-user AT delorie DOT com<=
/a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">&gt; =
&gt; &gt; I recently did a tiny bit of work on the parser in pcb.=C2=A0 Of =
course we<br>
&gt; &gt; &gt; should continue to support it, but it&#39;s going to be toug=
h to extend it<br>
&gt; &gt; &gt; much.=C2=A0 It&#39;s already overloaded in weird ways (e.g. =
thermals are parsed as<br>
&gt; &gt; &gt; flags, with their own non-flex sub-syntax, even though they =
don&#39;t set any<br>
&gt; &gt; &gt; actual flags).=C2=A0 If you do extend it you do hard work an=
d still only pcb<br>
&gt; &gt; can<br>
&gt; &gt; &gt; read it.=C2=A0 Of course you still have to teach the innards=
 of pcb about your<br>
&gt; &gt; &gt; extensions in order for them to do anything useful.<br>
&gt; &gt;<br>
&gt; &gt; A good start might be to write down what need to be stored even t=
hough<br>
&gt; &gt; they are not implemented right now and maybe never will be:<br>
&gt; &gt;=C2=A0 =C2=A01. Padstack, probably as collection of ordinary drawi=
ng primitives.<br>
&gt; &gt;=C2=A0 =C2=A02. Local copy and reference so update is possible.<br=
>
&gt; &gt;=C2=A0 =C2=A03. Net and possible segment attribute for route style=
, width.<br>
&gt; &gt;=C2=A0 =C2=A04. Net clerances between any net.<br>
&gt; &gt;=C2=A0 =C2=A05. Net clerance classes although (4.) could be extend=
ed before entering<br>
&gt; &gt; pcb.<br>
&gt; &gt;=C2=A0 =C2=A06. Trace impedance.<br>
&gt; &gt;=C2=A0 =C2=A07. Differential impedance?<br>
&gt; &gt;=C2=A0 =C2=A08. Pin swapping!<br>
&gt; &gt;=C2=A0 =C2=A09. Slot swapping.<br>
&gt; &gt;<br>
&gt;<br>
&gt; Lev did something very like this last time this got discussed as sql<b=
r>
&gt; schema.=C2=A0 I don&#39;t think it had all the above but some of it.<b=
r>
&gt;<br>
&gt; Britton<br>
<br>
I wrote down some more in a text files. Would it be possible collect them s=
omewhere there everybody could read them?<br>
<br>
<br>
Nicklas Karlsson<br>
</blockquote></div>

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