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 CAD / LDraw Files / Parts / 5470
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Subject: 
Re: BFC inversion...
Newsgroups: 
lugnet.cad.dat.parts
Date: 
Tue, 5 Oct 2004 20:12:04 GMT
Viewed: 
4564 times
  
Steve Bliss wrote:
In lugnet.cad.dat.parts, Franklin W. Cain wrote:

this is the first time I've tried using the "invertnext"
BFC statement.  would someone plz double check my code?
thnx.......


1 16 0 0 0 1 0 0 0 1 0 0 0 1 s\973psb1.dat
1  2 0 0 0 1 0 0 0 1 0 0 0 1 s\973psb2.dat
0 BFC CERTIFY INVERTNEXT
1 16 0 0 0 -1 0 0 0 1 0 0 0 1 s\973psb1.dat
0 BFC CERTIFY INVERTNEXT
1  2 0 0 0 -1 0 0 0 1 0 0 0 1 s\973psb2.dat


Since you used a mirrored reference to the subfiles, you should not need the
INVERTNEXT statements.


1 2 -9.875 9.875 -10 1.625 0 -1.25 -1.625 0 -1.25 0 1 0 1-4ndis.dat
0 BFC CERTIFY INVERTNEXT
1 2 -10.125 10.125 -10 -1.625 0 -1.25 1.625 0 -1.25 0 1 0 1-4ndis.dat
1 2 -8.625 11.625 -10 -1.625 0 1.25 1.625 0 1.25 0 1 0 1-4ndis.dat
0 BFC CERTIFY INVERTNEXT
1 2 -8.375 11.375 -10 1.625 0 1.25 -1.625 0 1.25 0 1 0 1-4ndis.dat


With 2D objects, you should flip & rotate them to show their front face, not use
INVERTNEXT.


Also, is it now standard to repeat the 'CERTIFY' keyword on every
BFC line?

I thought CERTIFY was only useful once at the beginning of the
file? I've been out of the loop, did I miss something?

-Kyle


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Message has 2 Replies:
  Re: BFC inversion...
 
(...) If so, then I missed it too (which is entirely possible!) I've never used CERTIFY at the beginning of a file, and TMK it's never been a problem. I use "BFC INVERTNEXT" where necessary, but no blanket CERTIFY statement. Is the inclusion of the (...) (20 years ago, 5-Oct-04, to lugnet.cad.dat.parts)
  Re: BFC inversion...
 
(...) No it isn't. (...) You are correct. CERTIFY, according to the BFC spec, is only allowed once in the file, before the first 'executable' line, on the very first BFC meta-statement. In fact, CERTIFY is *required* on that line. Steve (20 years ago, 6-Oct-04, to lugnet.cad.dat.parts)

Message is in Reply To:
  Re: BFC inversion...
 
(...) Since you used a mirrored reference to the subfiles, you should not need the INVERTNEXT statements. (...) With 2D objects, you should flip & rotate them to show their front face, not use INVERTNEXT. Steve (20 years ago, 5-Oct-04, to lugnet.cad.dat.parts)

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