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Date: Thu, 28 Jan 2016 22:40:23 +0100
Message-ID: <CADL2oCW34ALqEpGxu2JpBFpy14GvUda9=cExW59ZkFNWLWrfOA@mail.gmail.com>
Subject: Re: [geda-user] The nature of gEDA layers
From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Your example of how you see a via work perfectly well. To write which
layers are connected I also think should work perfectly well.

I however still say the drilled holes end up on at least board layers as
cut outs so in sort of they are part of the board shape, this is however
not important because it will not change how the objects are defined in
your example.

Nicklas Karlsson


2016-01-28 22:24 GMT+01:00 Nicklas Karlsson <nicklas DOT karlsson17 AT gmail DOT com>:

> To use via/pin/pad from a predefined library and be able to update them
> would be very nice then a small adjustment is needed.
>
> Sometimes a pad need to have a little bit unusual shape and in such cases
> it is very useful with possibility to add the necessary shape on the need=
ed
> layer. For example a power pad or antenna.
>
> I am looking at clearance and maybe it is possible with a small step in
> this direction at the same time.
>
> Nicklas Karlsson
>
>
> 2016-01-28 21:46 GMT+01:00 Britton Kerin (britton DOT kerin AT gmail DOT com) [via
> geda-user AT delorie DOT com] <geda-user AT delorie DOT com>:
>
>> On Thu, Jan 28, 2016 at 11:08 AM, Stephan B=C3=B6ttcher <geda AT psjt DOT org> =
wrote:
>> > "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]"
>> > <geda-user AT delorie DOT com> writes:
>> >
>> >> It's highly unlikely it'll be easier for just BBVias.  I believe
>> >> there's already an experimental branch that implements them.  Igor is
>> >> likely to decide to implement them again while we all talk about it.
>> >> For containers to pay off several other applications for them would
>> >> need to exist and be important enough to get implemented.  What are
>> >> they?
>> >
>> > My use cases for a mor egeneralized data model:
>> >
>> >  - pad stacks, with differnet pad sizes on middle layers
>>
>> Everyone seems to want these, to be honest I don't understand what
>> pads on middle layers are for.  Not mounting components for sure.  If
>> it's just a node what's wrong with a trace or poly?
>>
>> >  - hierarchical layout
>>
>> It can be done now...
>>
>> >  - rigid-flex baords with more than two outer layers
>>
>> I've never done these.  I guess the flexing connector layer is on top,
>> but only where it exists so you can still have components on the layer
>> below?
>> There's still only one top layer at any given point?
>>
>> > To avoid more spagetti special casing in the future for all kinds of
>> > use cases.
>>
>> I've just been through a lot of DRC and while it's true that e.g.
>> geometrical tests could be concentrated in Union types or something,
>> they're still gonna have to go somewhere and it wasn't that bad to
>> find them as they are.  Adding abstractions that aren't universally
>> utilized doesn't necessarily make a code any more comprehensible,
>> because sometimes-utilized abstractions are arguably more confusing
>> than none at all.  To justify things like containers on
>> code-cleanliness grounds a big refactor effort is implied.
>>
>> Britton
>>
>>
>

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<div dir=3D"ltr"><span style=3D"font-size:12.8px">Your example of how you s=
ee a via work perfectly well. To write which layers are connected I also th=
ink should work perfectly well.</span><div><br></div><div>I however still s=
ay the drilled holes end up on at least board layers as cut outs so in sort=
 of they are part of the board shape, this is however not important because=
 it will not change how the objects are defined in your example.</div><div>=
<br></div><div>Nicklas Karlsson</div><div><br></div></div><div class=3D"gma=
il_extra"><br><div class=3D"gmail_quote">2016-01-28 22:24 GMT+01:00 Nicklas=
 Karlsson <span dir=3D"ltr">&lt;<a href=3D"mailto:nicklas DOT karlsson17 AT gmail.=
com" target=3D"_blank">nicklas DOT karlsson17 AT gmail DOT com</a>&gt;</span>:<br><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #c=
cc solid;padding-left:1ex"><div dir=3D"ltr"><div>To use via/pin/pad from a =
predefined library and be able to update them would be very nice then a sma=
ll adjustment is needed.</div><div><br></div><div>Sometimes a pad need to h=
ave a little bit unusual shape and in such cases it is very useful with pos=
sibility to add the necessary shape on the needed layer. For example a powe=
r pad or antenna.<br></div><div><br></div><div>I am looking at clearance an=
d maybe it is possible with a small step in this direction at the same time=
.</div><span class=3D"HOEnZb"><font color=3D"#888888"><div><br></div><div>N=
icklas Karlsson</div><div><br></div></font></span></div><div class=3D"HOEnZ=
b"><div class=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gmail_quo=
te">2016-01-28 21:46 GMT+01:00 Britton Kerin (<a href=3D"mailto:britton.ker=
in AT gmail DOT com" target=3D"_blank">britton DOT kerin AT gmail DOT com</a>) [via <a href=
=3D"mailto:geda-user AT delorie DOT com" target=3D"_blank">geda-user AT delorie DOT com</=
a>] <span dir=3D"ltr">&lt;<a href=3D"mailto:geda-user AT delorie DOT com" target=
=3D"_blank">geda-user AT delorie DOT com</a>&gt;</span>:<br><blockquote class=3D"g=
mail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-l=
eft:1ex"><span>On Thu, Jan 28, 2016 at 11:08 AM, Stephan B=C3=B6ttcher &lt;=
<a href=3D"mailto:geda AT psjt DOT org" target=3D"_blank">geda AT psjt DOT org</a>&gt; wr=
ote:<br>
&gt; &quot;Britton Kerin (<a href=3D"mailto:britton DOT kerin AT gmail DOT com" target=
=3D"_blank">britton DOT kerin AT gmail DOT com</a>) [via <a href=3D"mailto:geda-user AT d=
elorie.com" target=3D"_blank">geda-user AT delorie DOT com</a>]&quot;<br>
&gt; &lt;<a href=3D"mailto:geda-user AT delorie DOT com" target=3D"_blank">geda-us=
er AT delorie DOT com</a>&gt; writes:<br>
&gt;<br>
&gt;&gt; It&#39;s highly unlikely it&#39;ll be easier for just BBVias.=C2=
=A0 I believe<br>
&gt;&gt; there&#39;s already an experimental branch that implements them.=
=C2=A0 Igor is<br>
&gt;&gt; likely to decide to implement them again while we all talk about i=
t.<br>
&gt;&gt; For containers to pay off several other applications for them woul=
d<br>
&gt;&gt; need to exist and be important enough to get implemented.=C2=A0 Wh=
at are<br>
&gt;&gt; they?<br>
&gt;<br>
&gt; My use cases for a mor egeneralized data model:<br>
&gt;<br>
&gt;=C2=A0 - pad stacks, with differnet pad sizes on middle layers<br>
<br>
</span>Everyone seems to want these, to be honest I don&#39;t understand wh=
at<br>
pads on middle layers are for.=C2=A0 Not mounting components for sure.=C2=
=A0 If<br>
it&#39;s just a node what&#39;s wrong with a trace or poly?<br>
<br>
&gt;=C2=A0 - hierarchical layout<br>
<br>
It can be done now...<br>
<span><br>
&gt;=C2=A0 - rigid-flex baords with more than two outer layers<br>
<br>
</span>I&#39;ve never done these.=C2=A0 I guess the flexing connector layer=
 is on top,<br>
but only where it exists so you can still have components on the layer<br>
below?<br>
There&#39;s still only one top layer at any given point?<br>
<span><br>
&gt; To avoid more spagetti special casing in the future for all kinds of<b=
r>
&gt; use cases.<br>
<br>
</span>I&#39;ve just been through a lot of DRC and while it&#39;s true that=
 e.g.<br>
geometrical tests could be concentrated in Union types or something,<br>
they&#39;re still gonna have to go somewhere and it wasn&#39;t that bad to<=
br>
find them as they are.=C2=A0 Adding abstractions that aren&#39;t universall=
y<br>
utilized doesn&#39;t necessarily make a code any more comprehensible,<br>
because sometimes-utilized abstractions are arguably more confusing<br>
than none at all.=C2=A0 To justify things like containers on<br>
code-cleanliness grounds a big refactor effort is implied.<br>
<span><font color=3D"#888888"><br>
Britton<br>
<br>
</font></span></blockquote></div><br></div>
</div></div></blockquote></div><br></div>

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