X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com From: geda AT psjt DOT org (Stephan =?utf-8?Q?B=C3=B6ttcher?=) To: gedau AT igor2 DOT repo DOT hu Cc: geda-user AT delorie DOT com Subject: Re: [geda-user] [pcb-rnd] new feature: polygon vs. polygon clearance References: Date: Sun, 24 Sep 2017 13:35:00 +0200 In-Reply-To: (gedau AT igor2 DOT repo DOT hu's message of "Sun, 24 Sep 2017 11:35:34 +0200 (CEST)") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id v8OBZ4Fq029846 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 Moin, gedau AT igor2 DOT repo DOT hu writes: > This enables polygons to make clearance around themsleves the same way > as lines or arcs do. (Speaking in technical terms, the new flag, > PCB_FLAG_CLEARPOLYPOLY is the polygon alternative to the clear-line > flag used on lines and arcs). I am not yet a pcb-rnd user, some what I am suggesting may already be implemented. Holes in polygons are parts of the polygon in pcb. Often I'd like to move them together with elements, so I'd prefer holes to be independent objects. Use case: holes on ground planes underneath element pads that cannot tolerate parasitic capacitance, like current feadback amplifier inverting inputs. Clearances could be represented as stacks of copper objects with negative/clearance objects. If you go that route, there may eventually be a need for a depth attribute for all objects, which is currently implicit: polygons are lowest, clearances in the middle, and lines/arcs on top. > The real reason for adding this feature was to support arbitrary > shaped smd pads with subcircuits - the smd pad needs to be able to > clear other polygons. Being able to draw these thick islands in a > ground plane is just a bonus. Gruß, -- Stephan