On Wed, 5 Aug 2015, Wayne Stambaugh wrote:
> >>> to that? Some (particularly older and non-Asian) board houses still
> >>> expect those... Is there any reason they were removed
so, an articulated use case for the inch output
>> AFAIK there would be no technical reason to not do inch
>> plotting...
> If we use a 6 digits mantissa and mm in Gerber, there is no
> rounding issue.
or perhaps it just crops up more rarely? Absent edge path
interference auditting, it would seem so
I guess I don't see how using any numbering system in the
output side does not carry the prospect for potential overlap.
I _think_ you are saying 'using the same precision' for
internal representation rather than transitions 'back and
forth' and so having accumulating 'roundoff indeterminancy /
error' terms in play helps avoid inadvertently producing:
Self intersecting polygons
at gerber output time, minimizes this occurring?
> > We already have a bug report about self intersecting polygons in Gerber
> > files from Kicad.
This seems like 'papering over' an issue, rather than
detecting closure (and, so, an inadvertent failure to close),
and 'intrusion' by adjacent entities (a convex hull / boundry
problem)
-- Russ herrold
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