Special:
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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Inverse matrix?
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Newsgroups:
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lugnet.cad.ray, lugnet.cad
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Date:
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Sun, 8 Apr 2007 00:04:30 GMT
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Viewed:
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7244 times
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On Apr 7, 2007, at 11:59 PM, James Reynolds wrote:
> > > Just take the transpose of the 3x3 world rotation matrix and it
> > > should work as
> > > the inverse. Transpose means swap diagonals M[1,2] <=> M[2,1] etc.
> >
> > I mean swap the OFF-diagonals, leave the diagonals as is.
> >
> > > If this doesn't work I've misunderstood you.
>
> (I might still look it up as I may need to know about it)
Did you mean this:
[ 1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16 ]
[ 1 5 9 13
2 6 10 14
3 7 11 15
4 8 12 16 ]
I have yet to try it.
James
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Inverse matrix?
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| (...) I learned my matrix math from a 3d game programming book and I have no idea what the diagonals are... I was going to look it up but I got Travis' code to work! (URL) might still look it up as I may need to know about it) James (17 years ago, 7-Apr-07, to lugnet.cad.ray, lugnet.cad)
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