Subject:
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L3Lab and BFC
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 19 Apr 2000 01:43:40 GMT
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Viewed:
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587 times
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I have been very busy for the past weeks (tearing down a brick fireplace (real bricks :-)
and a 20 feet chimney, painting ceilings and walls, the Sping has really put ideas
into my wife's head :-), but last night I finally got some time for myself.
So I implemented BFC in L3Lab according to the current specs.
CW/CCW flipping and matrix inversion checking is handled during file parsing,
so the penalty for BFC checking while rendering is almost immeasurable (<1%)
I have added two directories to the file search path, so you don't have to overwrite
your parts/primitives with Steve's BFC versions. The file search path is now:
Current directory
%LDRAWDIR%\BFC\P
%LDRAWDIR%\BFC\PARTS
%LDRAWDIR%\P
%LDRAWDIR%\PARTS
%LDRAWDIR%\MODELS
Directory of model file (L3P/L3Lab specific I think)
BTW, I think there is an error with the winding of Steve's 3001.dat,
it should be CCW...
BFC is on per default, which is NOT good when viewing a single part:
the parts is treated as certified, even if it isn't, and primitives may get
erroneously clipped.
Maybe I should test if a model (here a part) has any tris/quads or
primitive-references, and if so assume it is a part, and turn BFC off?
When BFC is off, mytest6 works as usual.
When BFC is on, mytest6 shows
green: faces to be drawn
red: faces to be clipped (you shouldn't see any of these ;-)
blue: faces always draw (clipping off)
I'm in the middle of updating the file polling and other things,
so it's not a fully tested release, but you can test the BFC:
http://www.netby.net/Nord/Mandelvej/Hassing/l3lab.html
Well, I'm off for a 4-day week-end in a cottage at the sea...
/Lars
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Message has 1 Reply:
 | | Re: L3Lab and BFC
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| (...) Woo-hoo! This is great! :):):) Now, if L3Lab would just stop GPF'ing when I close the LDAO Editor windows... (...) That's good news. (...) Nifty. (...) Arrr, you're right. (...) Cool! (...) OK, you must be back from the cottage now. Is there (...) (25 years ago, 25-Apr-00, to lugnet.cad.dev)
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