Re: gEDA-user: Functional blocks and PCB format changes

[DJ Delorie <dj@xxxxxxxxxxx>]

> But suppose the user creates a rule like, "all traces on Layer 3 must
> be at least 5mm apart", and then saves the file and reloads it. Now the
> information about what traces are affected is lost, except that all the
> traces on Layer 3 are coincedentally tagged with the rule.
> 
> What if the user then decides he wants the rule to apply to Layer 4
> instead?

In that specific case, we could apply rules to layers as well as
objects, but I see your point.

Unfortunately, the math behind DRC is expensive, so generalizing the
rules needs to mesh well with doing the math only once.


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