Very interesting, thank you JP. The Pcbnew file format only supports the second representation (main outline with all its holes connected to the main outline), correct?
-Matthew On Fri, Jul 10, 2015 at 1:05 PM, jp charras <[email protected]> wrote: > Le 10/07/2015 19:17, Matthew Beckler a écrit : > > I have some python code to convert an SVG image to a Kicad pcb module > > silkscreen, however it doesn't work great for polygons that contain > cutouts > > (such as the holes in the characters A, B, Q, etc). It seems like pcbnew > > does not support having cutouts inside a filled region. I've noticed that > > bitmap2component works around this by creating infinitely-thin > connections > > from a polygon's outside edge to each of the cutouts, effectively > > connecting each cutout with the exterior. > > > > The code isn't great, but here's what I've got so far. It's based on the > > Egg-Bot code (used for driving a two-axis plotter based on SVG files), > and > > I need to figure out what sort of licensing is needed for it based on all > > the library files used. > > https://github.com/wayneandlayne/svg2kicadmod > > > > Right now you need to pick the desired width and/or height in mm when you > > run the script, so if you need different sizes of your logo then you need > > to create several .kicad_mod files. Eventually it would be really great > to > > have support for changing the scaling of the rasterized logo right within > > pcbnew, so I perhaps having a python plugin for fancy SVG-based board > > graphics would be neat. > > > > -Matthew Beckler > > Co-founder and Engineer > > W&L > > > > Generally speaking, about polygons with holes, there are 2 dual > representations, and they are both used in Kicad: > > - The first is (obviously) "polygon with holes", which handles a set of > polygons: the main outline and its holes. > It is very useful to edit a complex polygon shape, but not usable to > draw/plot it. > > - The second is to use only one polygon which is the main outline with > all its holes "connected" to the main outline by overlapping segments > (what you are calling "infinitely-thin connections"). > It is very useful to draw/plot a complex polygon shape, but not very > usable to edit it. > > When you want to handle complex polygons, many times you have to change > the polygon description from the first to the second, and from the > second to the first representation. > > -- > Jean-Pierre CHARRAS > > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : [email protected] > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp >
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