gEDA-user: GEDA: Polygon integrity check

[Dave N6NZ <n6nz@xxxxxxxx>]

So I've just completed a (2 layer) board where it was a challenge to 
keep the ground and power planes from getting chewed up beyond 
usefulness. It made me think it would be nice if the DRC could warn 
about thin necks in polygons.  How hard would it be to do a computation 
like that?

I would propose a rule that checked to make sure that for every polygon 
region, it was in sum connected to neighboring regions by at least XX 
mils width of copper.  Not sure how easy it is to identify "regions" and 
do that sort of computation.

Or maybe that each region has at least one neck of at least xxx mils to 
a neighbor region.

Another approach that might have some utility is to do a temporary 
polygon computation using the same poly clearing code as now, except to 
use a wider clearance number on all the tracks.  Then XOR the resulting 
temporary polygon with the real polygon.  Big voids would show up 
indicating weakly connected regions.

OK... enough random brain wandering....

-dave


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