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

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