Thanks very much for your help

"Chris Huff" <chr### [at] maccom> wrote in message
news:chrishuff-32ACDA.21070609012001@news.povray.org...
> Well, the vrotate() function may do what you want. It takes a point and
> rotation vector, and returns the result of rotating that point.
> The vtransform() function in MegaPOV may also be helpful to you, it
> takes actual transformations instead of just a rotation vector, but you
> have to use a non-standard version of POV.
>
> About a separate program that does this: I'm not sure how useful that
> would be. The scale, rotate, and matrix transformations can change
> orientation and shape as well as position, and I don't think raw numbers
> representing a point will be very useful in visualizing transformations.
> And calculating a position with an external program and entering it into
> the scene file won't be as precise as entering the transformations
> themselves, and the result won't be anywhere near as readable. (How is
> someone reading the source supposed to know that a sphere at
> xx.xxxxxxxxxxxxx is the result of a simple translation and rotation?)
>
> If you just want the math, you can find it on one of the matrix tutorial
> pages, like http://enphilistor.users4.50megs.com/matrix.htm, or look in
> the POV-Ray source code(matrices.c, Compute_Rotation_Transform()).
>
> --
> Christopher James Huff
> Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
> TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
>
> <><
>

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