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	Fri, 02 Oct 2015 16:21:15 -0700 (PDT)
Date:	Fri, 2 Oct 2015 15:21:15 -0800
Message-ID:	<CAC4O8c_kjtsHhyjH+fPZvhDdPxc+Z+L5RxPy4SpJ8dmcGNKMiA@mail.gmail.com>
Subject:	[geda-user] making DRC less misleading in the presence of shorts, non-routed
	rats, etc.
From:	"Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Reply-To:	geda-user AT delorie DOT com

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At the moment DRC catches near-shorts (trace too close to another), but is
completely silent when there's an actual short.

Same thing for not-routed rats sort of: a marginal connection is reported,
a completely missing one is not.

I remember being unpleasantly surprised by this so I'd like to do something
about it.

Possible approaches and related questions I have:

  *  The simplest option is to just always put a DRC entry in the list
explaining the issue and
     instructing the user what to do to make sure everything is ok.  I'm
leaning towards this
     option.  It's slightly less good but way easier to implement and I
think addresses the issue
     well enough.

  * The magic that detects both these condition is AddAllRats().  It sets a
variety of global state
     for various problems of interest like the above.  So it could be
called on DRC refresh and used
     to generate DRC reports for these problems.  The problem is it's
destructive: it resets the rats
     so if the user is trying to work on a subset of the board while
sometimes doing DRC refresh it's
     going to be annoying.  Is there a non-destructive equivalent?  Would
it be simple to create one?

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<div dir=3D"ltr"><br><div style=3D"">At the moment DRC catches near-shorts =
(trace too close to another), but is completely silent when there&#39;s an =
actual short. =C2=A0</div><div style=3D""><br></div><div style=3D"">Same th=
ing for not-routed rats sort of: a marginal connection is reported, a compl=
etely missing one is not.</div><div style=3D""><br></div><div style=3D"">I =
remember being unpleasantly surprised by this so I&#39;d like to do somethi=
ng about it.</div><div style=3D""><br></div><div style=3D"">Possible approa=
ches and related questions I have:</div><div style=3D""><br></div><div styl=
e=3D""><div>=C2=A0 * =C2=A0The simplest option is to just always put a DRC =
entry in the list explaining the issue and</div><div>=C2=A0 =C2=A0 =C2=A0in=
structing the user what to do to make sure everything is ok.=C2=A0 I&#39;m =
leaning towards this=C2=A0</div><div>=C2=A0 =C2=A0 =C2=A0option.=C2=A0 It&#=
39;s slightly less good but way easier to implement and I think addresses t=
he issue</div><div>=C2=A0 =C2=A0 =C2=A0well enough.</div></div><div style=
=3D""><br></div><div style=3D"">=C2=A0 * The magic that detects both these =
condition is AddAllRats().=C2=A0 It sets a variety of global state<br></div=
><div style=3D"">=C2=A0 =C2=A0 =C2=A0for various problems of interest like =
the above.=C2=A0 So it could be called on DRC refresh and used</div><div st=
yle=3D"">=C2=A0 =C2=A0 =C2=A0to generate DRC reports for these problems.=C2=
=A0 The problem is it&#39;s destructive: it resets the rats</div><div style=
=3D"">=C2=A0 =C2=A0 =C2=A0so if the user is trying to work on a subset of t=
he board while sometimes doing DRC refresh it&#39;s =C2=A0 =C2=A0 =C2=A0=C2=
=A0</div><div style=3D"">=C2=A0 =C2=A0 =C2=A0going to be annoying.=C2=A0 Is=
 there a non-destructive equivalent?=C2=A0 Would it be simple to create one=
?</div><div style=3D""><br></div><div style=3D"">=C2=A0</div><div style=3D"=
"><br></div></div>

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