"Tor Olav Kristensen" <tor### [at] TOBEREMOVEDgmailcom> wrote:
> "Bald Eagle" <cre### [at] netscapenet> wrote:
> > So here's how I got it to NOT crash, but my mapping results suck.
> >
> > Remove all of the protective select () and mod () functions, and it will crash.
> >
>
> Here's what you can do to make it work:
>...

Sorry, I made a little mistake in the code below:

>...
> #declare s2d =
>     function(X, Y) {
>         select(
>             X*X + Y*Y,
>             select(
>                 1 - X*X*Y*Y,
>                 sqrt(
>                     (X*X + Y*Y - 2*X*X*Y*Y)/
>                      ((X*X + Y*Y)*(1 - X*X*Y*Y))
>                 )*X,
>                 sqrt(0.5)*X,
>                 sqrt(
>                     (X*X + Y*Y - 2*X*X*Y*Y)/
>                      ((X*X + Y*Y)*(1 - X*X*Y*Y))
>                 )*X
>             )*X,

Remove the last *X above


>             0,
>             select(
>                 1 - X*X*Y*Y,
>                 sqrt(
>                     (X*X + Y*Y - 2*X*X*Y*Y)/
>                      ((X*X + Y*Y)*(1 - X*X*Y*Y))
>                 )*X,
>                 sqrt(0.5)*X,
>                 sqrt(
>                     (X*X + Y*Y - 2*X*X*Y*Y)/
>                      ((X*X + Y*Y)*(1 - X*X*Y*Y))
>                 )*X
>             )
>         )
>     }
> ;
>...

--
Tor Olav
http://subcube.com
https://github.com/t-o-k

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