POV-Ray : Newsgroups : povray.general : Vector Reorientation: overcoming the twist. : Re: Vector Reorientation: overcoming the twist. Server Time
31 Jul 2024 06:14:21 EDT (-0400)
  Re: Vector Reorientation: overcoming the twist.  
From: Charles C
Date: 1 Oct 2007 20:00:00
Message: <web.4701891ad4861b48c667cf480@news.povray.org>
Christian Froeschlin <chr### [at] chrfrde> wrote:
> Greg M. Johnson wrote:
>
> > I have an object that I am reorienting from y to -y.  At the .y=0
> > transition, there is a flip.
> >
> > I see how Mike Williams did it in sweepmesh, but for practicality in my case
> > I would like a single transform.  Is there no simple mathematical
> > transformation that allows this to happen without the flip?
>
> I'm not sure what you mean by "reorienting from y to -y without flip".
> A rotation by 180 degrees might be what you are looking for.

Hmm, y to -y but no flip?  Like scale y by -1 so it's reversed, and then
translate it back to the same position?    You can always put
multiple/sequential transformations into a single transform{} variable.

Charles


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