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From: wdc@ATHENA.MIT.EDU (Bill Cattey)
Newsgroups: comp.soft-sys.andrew
Subject: How to make zip much more reliable.
Message-ID: <ka8a33QGG02=0F0iE1@athena.mit.edu>
Date: 10 Apr 90 22:40:03 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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I (and many others, no doubt) have had the frustrating experience of
trying to do close work with zip and having it seem to ignore or mis-do
the commands I specify.

I thought this was because of some terrible bug deep inside the system
that was causing mouse motion to be mis-processed.

It turns out that it's a preference that is set to a very different
default than my expectation:

ZipCreateTolerance

The default is 10.  This means that if I try to continue a polygon
within 10 pixels of the previous point, I can't.  I have just tested the
preference:

*.ZipCreateTolerance: 0

in global.prf, and zip is MUCH nicer to me.  Even tickling arcs is easier.

I strongly recomment that further testing be done, with an eye to making
zero the default value.

-wdc