Subject:
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Re: primer/tutorial on BFC?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Sun, 28 Dec 2003 21:21:56 GMT
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Viewed:
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1771 times
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In lugnet.cad.dev, Steve Bliss wrote:
> In lugnet.cad.dev, Chris Dee wrote:
> [snip]
>
> Thanks for writing this up, Chris!
>
> Your explanation was very good in all respects except for one small point:
>
> > ... although for cylinders it
> > is possible to turn them inside out by negating the transformation matrix, and
> > adjusting the position).
>
> Actually, negating the transformation matrix should not invert any object; and even
> if it does, it's not a valid technique for BFC'ing.
>
> Steve
OK - it's not a technique I use, but in an email conversation recently somebody
convinced me that inverting the matrix would switch the winding. Now that I test
it again I found I was mistaken.
Chris
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Message is in Reply To:
![](/news/x.gif) | | Re: primer/tutorial on BFC?
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| In lugnet.cad.dev, Chris Dee wrote: [snip] Thanks for writing this up, Chris! Your explanation was very good in all respects except for one small point: (...) Actually, negating the transformation matrix should not invert any object; and even if it (...) (21 years ago, 28-Dec-03, to lugnet.cad.dev)
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19 Messages in This Thread: ![primer/tutorial on BFC? -Franklin W. Cain (24-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: primer/tutorial on BFC? -Chris Dee (27-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: primer/tutorial on BFC? -Steve Bliss (28-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![You are here](/news/here.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Andrew Westrate (30-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: primer/tutorial on BFC? -Steve Bliss (31-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: primer/tutorial on BFC? -Travis Cobbs (3-Jan-04 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: primer/tutorial on BFC? -Tore Eriksson (3-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: primer/tutorial on BFC? -Lars C. Hassing (3-Jan-04 to lugnet.cad.dev)](/news/x.gif) ![](/news/246.gif) ![Re: primer/tutorial on BFC? -Travis Cobbs (3-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Steve Bliss (4-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Steve Bliss (4-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Orion Pobursky (3-Jan-04 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: primer/tutorial on BFC? -Niels Karsdorp (3-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Travis Cobbs (4-Jan-04 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: primer/tutorial on BFC? -Franklin W. Cain (30-Dec-03 to lugnet.cad.dev)](/news/x.gif) ![](/news/46.gif) ![Re: primer/tutorial on BFC? -Niels Karsdorp (30-Dec-03 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: primer/tutorial on BFC? -Willy Tschager (30-Dec-03 to lugnet.cad.dev)](/news/x.gif)
![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: primer/tutorial on BFC? -Steve Bliss (31-Dec-03 to lugnet.cad.dev)](/news/x.gif)
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