There is an old program out there somewhere that is called Lefter that does
the conversion. You have to make sure to change the *y and *z stuff though.
"Thomas Lake" <tla### [at] REMOVE-THISshawca> wrote in message
news:3ccbe337@news.povray.org...
> I'm trying to write a program that converts Moray's povray output, which
> uses the right hand coordinate system, to povray's native left handed
> system. As you can see from the images bellow I'm not quite 1/2 way there
> yet. The method I use is simply to comment out the sky and up key words in
> Moray's output thereby defaulting to povray's lefthanded system. Then for
> all vectors I switch the z and y positions. For example
>
> translate <10,-50,100>
>
> becomes
>
> translate <10,100,-50>
>
> This seems to work fine for translate and scale but rotation is a
different
> matter all together. I found a way to get rotation to work some of the
time
> by reversing the sign of the magnitude and rotating around the Z axis
before
> the y axis, so for example
>
> rotate <-28.678608, -34.926117, 42.857418>
>
> becomes
>
> rotate 28.678608*x rotate 34.926117*z rotate -42.857418*y
>
> As you can see from the image below this works for the rotated box in the
> background but not for the superellipsoid in the front. Also I get all
kinds
> of nightmarish things happening if I try to work with csg and rotation.
Can
> anyone help here cause I feel like I'm close to a solution.
>
> --
> --------------------------------------------------------------------------
--
> -----------
> Home Page: http://www.geocities.com/~thomaslake/
> --------------------------------------------------------------------------
--
> -----------
>
>
>

Post a reply to this message