Re: gEDA-user: Refresh all polygons

["Peter C.J. Clifton" <pcjc2@xxxxxxxxx>]

On May 10 2011, DJ Delorie wrote:

> Make sure you have my patch to src/insert.c that calls
> ClearFromPolygon() and RestoreToPolygon().
>
> Failing that, Peter says calling InitClip() for every polygon will
> recompute them, but at the moment, there's no way to do that from the
> GUI.  In theory, you should never have to.  If you can come up with a
> small self-contained test case, file a bug so we can fix it.

In addition to the patch DJ mentioned, the one I think you're more likely 
to be hitting (depending on what version of PCB you have), is the one fixed 
by this:


commit 79417191949173c16579554dc8f8d5b9cbb22b3a
Author: Peter Clifton <pcjc2@xxxxxxxxx>
Date:   Fri Apr 22 18:38:20 2011 +0100

   Fix geometry errors caused by commit 
2d8dc8a3a3a55158b4e6278dd9f40588e4111c2d
   
   This fixes up problems from the following commit:
   
       [PATCH] fix bug 2793480 (vias/arcs-to-polygon clearances)
   
       frac_circle(): introduce radius_adjustment factor to make
       the polygon outline the arc rather than connet points on the arc
   
       ArcPolyNoIntersect(): compute number of segments so that
       polygon diverges from the arc no more than 0.02 of
       required thickness; adjust outer "arc" radius like in frac_circle()
   
   The object bounding boxes for arcs, vias, lines and rounded pads which
   determine the maximum area affected by that object were no longer
   correct, leading to artaefacts when doing incremental polygon 
processing.
   
   It also lead to missing fragments in (the non-curved + and x type
   thermals). These are also fixed up by this patch.


Could you elaborate as to what PCB version (git SHA1 if you built from 
git), and what symptoms you're seeing (perhaps with a screen-shot of the 
problem).

It is far more important to us that polygons "Just work", rather than 
adding kludges in to let the user force recalculating them.

This said, I know where are some very rare cases with degenerate or complex 
curved geometry where PCB's polygon routines do get very confused, and will 
need to be forced to recalculate. (If necessary, I use the file save, file 
revert method as Kai-Martin suggested).

Best regards,

Peter Clifton


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