You do them in your head? I'm impressed... especially when it comes to
figuring out sine and cosine values.

Can you teach me to do that? I'm going to teach math eventually, so I should
probably learn to save face, or impress students.

John VanSickle wrote:

> Larry Fontaine wrote:
> >
> > Just for anybody who maybe isn't familiar with this feature...
>
> I have a whole page devoted to this, and it's fairly well-known
> 'round here.  You can find it at:
>
>   http://users.erols.com/vansickl/matrix.htm
>
> > You can use matrices in POV, and they're very useful because you can
> > shear (only way to do so), and you can multiply them so you only have
> > one transform statement in your object.
> > Most of you probably knew that.
>
> Yup.
>
> > Format is:
> >    matrix <Ax,Ay,Az,Bx,By,Bz,Cx,Cy,Cz,Dx,Dy,Dz>
> > Matrix transformations in POV:
> >  shear x and y for z:
> >    [  1    0    0  ]
> >    [  0    1    0  ]
> >    [  X    Y    0  ]
> >    [  0    0    0  ]
>
> The third row should read:
>
>      [  X    Y    1  ]
>
> > I made a TI-86 program to find POV-matrices. Just select the transform
> > and enter the numbers. Maybe I'll post it.
>
> Bah.  I do them in my head.
>
> Regards,
> John
> --
> ICQ: 46085459

--
Joshua English
eng### [at] spiritonecom
IQC: 1946299
"It's a thankless job, but I've got a lot of Karma to burn off."

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