Subject:
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Re: What is BFC meta command ?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Mon, 3 Apr 2000 13:50:22 GMT
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Viewed:
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6170 times
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John Jensen <skurt@vip.cybercity.dk> wrote in message
news:ep26eso7d3ct4ll8ekf6osdf8gf2b0c20s@4ax.com...
> On Wed, 29 Mar 2000 21:52:37 GMT, Leonardo Zide
> <leonardo@centroin.com.br> wrote:
>
> > Damien Duquennoy wrote:
> > >
> > > With the new version of MLCad, i hear about BFC, but, i'm sorry, i don't • know what it is...
> > >
> > > Could someone give me explanations ?
> >
> > BFC means back face culling, it basically means that the rendering
> > program doesn't need to draw the faces that are not facing the viewer
> > (calculated by taking the dot product between a face normal and the
> > camera direction). It's there to make the rendering faster, you don't
> > need to worry about that if you're not creating a new part or writing a
> > CAD program. :)
> What if I am creating a new part?
Then you can make your part BFC compatible by making sure that the points of
a triangle or quad follow a clockwise path when the triangle or quad is
viewed from the "outside" of the part. But hopefully the programming
geniuses around here will be able to automate that process.
-John Van
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