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Subject: 
Re: Seams like a problem
Newsgroups: 
lugnet.cad.dev
Date: 
Wed, 11 Oct 2000 23:17:34 GMT
Viewed: 
821 times
  
Travis Cobbs wrote...
Thanks for this info, Lars.  I'll be updating LDView prior to releasing v1.0
to take these things into account.  I'm probably going to take rule 2 and
recursively apply it up the line to verify that none of the ancestors are
parts.  Does anybody see any problems with this?

Yes, I think it is unncessary. Why would you do that?
Besides it would hurt performance. With the current scheme I set a
Seamable flag on LT1 references once during input. Then if seams
are turned on I can simply test the flag when traversing the tree.

I'm a little confused here, though, because it seems to me that rule 2 would
prevent the seams from appearing in subparts, as long as they are truly
that:  SUBparts (although sub-subparts would have problems with a
single-level check for your parent being a part).  If someone were to
reference a subpart directly, then seams would appear, of course.  I think
the recursive check would prevent spurious seams for all subparts.  Am I
missing something here?

I'm not sure what you're aiming at. Can you give an example?
A subpart should only be a bit of a part that can be used repeatedly
to reduce part file size.
A subpart should not be a complete part, and parts should not be
subassemblies or shortcuts referencing other parts.
The idea is to consider a part as a unit that can be slightly shrunken.
Whether a part is one large DAT file or made up of several is unimportant.

Great job on tracking down #3, by the way; that's a truly nasty gotcha.
Needless to say, LDView currently exhibits the same problem when the seam
width is set to anything other than 0.

Thanks, I'm glad you understand and appreciate it!
/Lars



Message has 1 Reply:
  Re: Seams like a problem
 
"Lars C. Hassing" <lch@ccieurope.com> wrote in message news:G2AJD0.KAC@lugnet.com... (...) v1.0 (...) and (...) are (...) If you have a part which references a subpart which references another subpart (not likely, true), you don't want to shrink (...) (24 years ago, 12-Oct-00, to lugnet.cad.dev)

Message is in Reply To:
  Re: Seams like a problem
 
"Lars C. Hassing" <lch@ccieurope.com> wrote in message news:971175476.80878....cci.dk... (...) contained (...) there (...) one (...) to take these things into account. I'm probably going to take rule 2 and recursively apply it up the line to verify (...) (24 years ago, 11-Oct-00, to lugnet.cad.dev)

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