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R. Timothy Edwards writes:
 > Dear Philippe,
 > 
 >    Somewhere in magic version 7.1 or 7.2 I stuck in Euclidean distance
 > checking on corner extension rules.  To get the behavior, you need to put
 > 
 > #define DRC_EUCLIDEAN
 > 
 > at the top of drc/drc.h in the magic source.  I didn't define it by default
 > because it was not clear to me 1) whether it worked correctly in all cases,
 > and 2) whether most or all foundries accept Euclidean distances for DRC
 > cases.  If someone could clear up the second issue for me, I could work on
 > the first one.

wow, great!  the only manhatten only rule i'm aware of is the
so-called 'poly exclusion zone', the rectangular area beyond the edge
of a gate, where you cannot have the "other" select.  eg. for an nfet,
you cannot have p-select within (say) X in the x-dir as well as within
Y in the y-dir.

by any chance, did you also put in a wide-metal rule facility ? (to
force larger spacing when one of the edges is of a "wide" width
shape).

/jeff

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