On 04/29/2013 01:22 PM, Dick Hollenbeck wrote:
> Thomas,
>
>
> The keepout polygon you are putting into the DSN file is on a non-existent
> layer named
> "signal".
>
> It seems like a freerouter idiosyncrasy that it accepts this.
>
> Here is the grammar for specctra polygon:
>
>
> (polygon
> <layer_id >
> <aperture_width>
> {<vertex> }
> [(aperture_type [round | square])]
> )
>
> Here is what you are outputting:
>
>
> (keepout "" (polygon signal 0 220980 -125730 232410 -125730
> 232410 -137160 220980 -137160 220980 -125730))
>
>
> 1) Do you agree this is probably non-standard behaviour on the part of
> freerouter? If
> not, can you tell me the page number within the specctra spec where this
> single layer
> approach is explained?
>
>
> 2) Do you find that although this is only a *single* fictitious layer that
> you are
> outputting, that the keepout is respected on *all* cu layers within
> freerouter?
>
>
> There were a couple of user's using this export with the Electra router, is
> the reason I
> ask. It is important to know when we are relying on non-standard behaviour.
Never mind, I found it 12 seconds after I clicked "send". Top of page 108.
Cool. So the concept is general, not freerouter specific.
This is making use of a "reserved_layer_name" which is actually a category
consisting of
all cu layers. Good work.
>
>
> Thanks,
>
> Dick
>
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