Re: [Gerbv-devel] DRC

[Stephan B. <boe...@ph...>]

"Curtis C. Pope" <cp...@ho...> writes:

> I'll take a look at DRC.  I have looked at this before and come to the 
> same realization that you really need to compare the final polygons that 
> are created.  Never thought about rendering to a surface and looking at 
> the pixels between objects.
>
> I also thought about the idea of creating the polygons (nets) and then 
> expanding each polygon by half the clearance value desired, then 
> rendering two nets and looking for overlaps.  

I was thinking ... for most (all?)  DRC checks, what we need are
operations like

 * netlist extraction, i.e., figure out which objects are connected,
 * generate shapes resulting from the union of connected objects, 
 * bloat or reduce those shapes by a certain amount,
 * boolean operations of shapes,
 * check if the connectivity changed by those operations.,

A DRC check would become an expression of these operations.  Are there
libraries that provide these primitives?

-- 
Stephan