X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Date: Wed, 09 Jul 2014 13:59:39 +1200 From: Lilith Bryant Subject: Re: [geda-user] pour clearing around pads To: geda-user AT delorie DOT com In-Reply-To: <1404869573.3730.30.camel@pcjc2lap> (from pcjc2@cam.ac.uk on Wed Jul 9 13:32:53 2014) X-Mailer: Balsa 2.5.1-79-g9697477 Message-Id: <1404871179.750.51@zotlet.(none)> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id s69204FB030178 Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On 2014-07-09 01:32:53 PM, Peter Clifton wrote: > Bloating a convex part of the polygon (after shrinking) will also > introduce rounded corners, not necessarily an issue - but also not > necessarily what people might want, or expect. Certainly it would be a > break from what we currently expect. Ah, yes sorry. I didn't consider the corner rounding effect. But, it could be argued that ANY sharp corner is a DRC violation. i.e. if you measure across the corner diagonally, you've got a measurement less that the min copper width. i.e. if a 90 degree corner is ok, and a 5 degree "spike" corner certainly isn't, then where's the line in the sand? <90 is bad, >=90 is ok? Or maybe 85 degrees to cope with not-quite square polygons???? I don't think it's the end of the road for this idea, explicit corners could be re-squared off, but I accept that this is getting complex fast. I'm not bothered about corner rounding personally, but I can see why it would be a problem for some uses. So I will probably be writing a python tool for myself (and anyone else) to bake'n'round polygons. Now that I've figured out how it could be done. Clearly just too many issues to have it in the core.