Curtis,
No, nothing has ever been started on the DRC side. One option is
to write a routine that steps through the netlist of each layer, and
then use your own geometry calcs to calculate the clearance between
every other net in the layer. There is a bounding box calculation done
for every net already, so you can use that to eliminate 99% of the
checks by making sure the two nets are even close.
The width check will basically just involve stepping through the
net and looking for the minimum line width for drawn lines.
However, this will honestly be a difficult endeavor. With macros,
polygons, knockouts, step and repeats, etc...this will be very difficult
to do.
The other idea is to render the layer to a surface, and then
inspect the surface to figure out pixels between objects.
Did you get your cairo PNG rendering to work? Did the zoom_to_fit
function do the trick?
Julian
On 04/01/2011 03:53 PM, Curtis C. Pope wrote:
> Hi everyone. In searching the list, I found a topic "probe
> connectivity?" from back in 2009 where it looked like someone was going
> to start prototyping a DRC function. Does anyone know if there was any
> work done on that? I am looking for basic width/clearance checks and
> would love a starting point. I am using libgerbv to write my own
> rendering engine and DRC for my website.
>
> Any help/info would be greatly appreciated.
>
> Thanks,
> Curtis
> HobbyPCB
>
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