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 CAD / Development / 9383
  Re: primer/tutorial on BFC?  [DAT]
 
(...) I do agree that it isn't supposed to work, because the BFC spec very carefully states that any polygons drawn with an aggregate matrix that causes mirroring must be flipped back. (...) I'm sorry that LDView is crashing your system, but it (...) (21 years ago, 3-Jan-04, to lugnet.cad.dev)
 
  Re: primer/tutorial on BFC?
 
(...) L3Lab supports BFC INVERTNEXT. /Tore (21 years ago, 3-Jan-04, to lugnet.cad.dev)
 
  Re: primer/tutorial on BFC?  [DAT]
 
(...) I think it works just fine. L3Lab correctly detects that the matrix is mirroring, see View/Tree View... and click the BFC radio button, it should say INVERT in front of the line. When we discussed the BFC business the general assumption was (...) (21 years ago, 3-Jan-04, to lugnet.cad.dev)
 
  Re: primer/tutorial on BFC?
 
(...) You're right; I'm wrong. I'm still having a hard time visualizing it, but your stud example below convinced me that negating the one value in the matrix will indeed flip a 2D primitive like a disk, and this is the expected behavior. In fact, (...) (21 years ago, 3-Jan-04, to lugnet.cad.dev)
 
  Re: primer/tutorial on BFC?
 
(...) Actually, I *think* it's the new ATA controller card I installed, and LDView was just an innocent bystander. However, since LDView doesn't do BFC, I guess I didn't miss anything. (...) Yes, you could use INVERTNEXT, but that introduces (...) (21 years ago, 4-Jan-04, to lugnet.cad.dev)
 
  Re: primer/tutorial on BFC?
 
(...) Hmmm, very good point. I don't like treating specific object specially, but I don't see any way around it. I played around with the stud and with a 'solid' cylinder object, I couldn't find a way to get L3Lab's BFC handling to fail. Steve (21 years ago, 4-Jan-04, to lugnet.cad.dev)

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