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Tue, 08 Oct 2013 08:13:09 -0700 (PDT) | |
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Date: | Tue, 8 Oct 2013 10:13:09 -0500 |
Message-ID: | <CAM2RGhRjAwMrmhLydd19+FpboaAgD_FsGWZ7A8o_Rz_JiBbwxg@mail.gmail.com> |
Subject: | Re: [geda-user] polygons, arcs and footprints |
From: | Evan Foss <evanfoss AT gmail DOT com> |
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Sorry I meant ElementLine. On Tue, Oct 8, 2013 at 9:11 AM, Russell Dill <Russ DOT Dill AT asu DOT edu> wrote: > On Tue, Oct 8, 2013 at 8:33 AM, Evan Foss <evanfoss AT gmail DOT com> wrote: >> If your going to go about it that way then why use rectangles you >> could just as easily use stroke. > > I'm not sure what you mean, the only reference I can find in PCB in > reference to stroke seems to be related to gesture control. > >> I though arbitrary rotate of rectangles was not allowed in the pcb >> format. It does not work from the gui of the version I am using. Is >> that a bug? > > Because they aren't actually polygons, a "square" below is just a > primitive that ends up getting implemented in the backend with a PCB > pad/trace. > >> On Tue, Oct 8, 2013 at 8:13 AM, Russell Dill <Russ DOT Dill AT asu DOT edu> wrote: >>> On Fri, Oct 4, 2013 at 4:56 PM, Evan Foss <evanfoss AT gmail DOT com> wrote: >>>> Hi folks, >>>> >>>> I am trying to make a footprint for an LTC3441. The bottom pad is a >>>> polygon. I know they are not possible in PCB footprints but does >>>> anyone have a good way to emulation one? >>>> >>>> Also I am trying to use a MEMS microphone that uses a ring to seal it >>>> to the PCB. Again I know that does not exist but is there a way around >>>> it? >>> >>> A ring is a little more complicated, but here's an example of a funny >>> ring pad shape >>> >>> w = dmath.sin(dmath.radians(angle / 2)) * 2 >>> h = m.radius * dmath.cos(dmath.radians(angle / 2)) >>> piece = pscad.up(h) + pscad.square((w + m.width, m.width), >>> rounded=True, center=True) >>> ret = [] >>> for i in range(0, m.n): >>> ret.append(pscad.rotate(i * 360 / m.n) + piece) >>> return pscad.union() + tuple(ret) >>> >>> Attached is a single pad with the above pattern with n == 20, width == >>> 0.1mm, and radius == 1.0mm. >> >> >> >> -- >> Home >> http://evanfoss.googlepages.com/ >> Work >> http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/ -- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/
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