Ron Parker wrote:
> On Tue, 04 Dec 2001 20:31:12 -0500, Andrea Ryan wrote:
> > pointing the y axis up.  But positive rotation is clockwise with POV and
> > counterclockwise with math classes.  So if POV-Ray adopted y as up, why
> > not positive rotation as being counterclockwise?  I hope that I'm wrong
> > about this otherwise there would be a self-contraction.
>
> Because POV also adopted z as into the screen, which is not how it works
> in math.
>

When I was developing my person model (see it in p.b.a), I did the right
arm/leg and scaled it by <-1,1,1> to get the left.  What this means is that
when I'm figuring out the rotations for positioning the right side, I use my
left
hand, and when I'm figuring out the rotations for positioning the left side,
I use
my right hand.  Do you think I get confused?  You bet.

My point:  I need a point?

Tom Bates.

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