Martin Kupec <martin.ku...@kupson.cz> writes: > On Fri, Mar 18, 2011 at 07:18:52PM +0100, Stephan Boettcher wrote: >> The file format need not know about these distictions. Both are >> graphical layers, with different attributes. The one has attributes to >> tell DRC to flag overlapping components, the other has attributes to >> tell some autorouter not to put copper there, and attributes to tell DRC >> to check for intruding copper. Future plugins need more layers to tell >> about different constraints. >> >> Ideally, any layer type is fully defined via attributes. The most >> common attribute may be "net:conductive" for normal copper layers, so >> that the HIDs know that the layer contributes to the implementation of >> the netlist. Copper layers need a second attribute "gbr:layer=inner5" >> to tell the (gerber) exporter where to put it. A third attribute >> defines the DRC rules that apply "drc:rules=default", plus per layer >> override "drc:minwidth=6mil". >> >> "drc:courtyard=front" >> "drc:keepout=front" >> "route:keepout=front" > > > That is a bit complicated. I need a clean definition of layer types, so > one can pick the right layer when needed. But some attributes in > addition to layer type are possible.
I do not understand that argument. > Each element has a clearance attribute, so definition of extra space > around pads should be easy. But we can add 'keepout' layer in addition. > > Even when we would have more layer, it should be simplier to implement > them than some arbitrary flags. > > Defining DRC rules per layer is a bit different story and I hope it will > not be too closely related to changing of layer concept, as I don't want > to touch DRC. > > Martin Kupec > > > > _______________________________________________ > geda-user mailing list > geda-user@moria.seul.org > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user -- Stephan _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
