He may mean to add a "negative" polygon, which removes copper present within the polygon, instead of a "positive" polygon, which fills areas within the polygon with copper. The last polygon constructed has the final say over whether or not a given point has copper. This is standard practice in mechanical CAD packages - which also provide several boolean operations to overlapping geometries - AND, OR, XOR, etc. - which then generate a consolidated geometrical object (in the case of an AND or OR) or multiple objects (in the case of an XOR).
This would be a wonderful feature in PCB, but I'm sure it would take a fair effort in the generation of gerber files. -Ethan Duncan Drennan wrote: >> And how do I remove copper ? I know how to add copper, but not how to >> remove ! >> > > I don't really understand what you mean. Do you mean delete lines and > polygons? Just hold the pointer over what you want to delete and then > press delete. > > If you want to delete whole selections, then select what you want to > delete, type ":" and then "delete" and press enter. Alternatively > select it, then press CTRL-x (cut to buffer) and the ESC. > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user > > _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
