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From: R. Timothy Edwards (tim AT stravinsky DOT jhuapl.edu)
Date: Mon Feb 10 2003 - 12:28:38 EST

  • Next message: Philippe Pouliquen: "Re: magic DRC error" 

    Dear Philippe,

   If I understand the corner extension on the edge4way rule in your
tech file, "green" and "brown" are disallowed within 2 units of "brown".
This is checked over a corner extension distance of 4.  At first, I
thought that the root problem was that it is meaningless to supply a
corner extension distance that is larger than the original distance of
the error checking.  But I changed your rule to a corner extension
distance of 2, and if I extend the "green" area down to where the
green area becomes a 6x6 square, then I get the exact same effect
again---error in the middle, not on the top and bottom layouts.
   I would call this a definite error on magic's part.  Not only is
it an error, it's an error in ALL 3 cases, because the middle layout
only shows the error to 1 unit, whereas the error area should be a
2x2 box, reaching all the way to the maximum corner extension distance.
This should not be dependent on the configuration of space tiles.

					---Tim

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