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Magic Mailing List |
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From: R. Timothy Edwards (tim AT stravinsky DOT jhuapl.edu) Date: Thu Sep 27 2001 - 09:41:49 EDT
Dear Jeff, I'll give that some serious thought, as I have been occasionally troubled by magic's habit of leaving gaps between cells when shrinking layers (usually this means a well, and usually can be ignored, but it's really not proper to assume that everybody "knows" that you have to write CIF, read it back in verbatim, and check for these kind of violations. I don't think that a "must-overlap"-type of rule would be advisable, though. "no-overlap" and "exact-overlap" only have to check a boolean (yes/no) condition, which is easier to do across the hierarchy than checking for compliance across a given distance. However, I admit that I have not looked closely at the code for DRC checks across cell boundaries, so I will look at it and see how it might be implemented. I have become used to the fact that the original authors of magic were extraordinarily clever, and any obvious things which have not been implemented can be expected to be a real pain to deal with. Regards, Tim
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