As you use the evaluation of a pigment as a function, you should tell to pov
which color component you want to use:
 (x*x+y*y+z*z-1) + Cracks( x, y, z ).gray*5
That's the "." meaning
see the link given by Thorsen (bottom of the page)
Marc

3e1caaeb@news.povray.org...
> Oops,
> The example I showed could be misleading, because I had eliminated the
"*5"
> at the end of the function just to see what would happen. Here's the
message
> when the function is complete:
>
>   File: isocrackle.pov  Line: 95
>    function {
>
>       (x*x+y*y+z*z-1) + Cracks( x, y, z ) * <----ERROR
>
> Parse Error: Expected '.', * found instead
> Returned from renderer with error status
>
>
> Steve Shelby <ssh### [at] rexnetnet> wrote in message
> news:3e1ca8fc@news.povray.org...
> > Hi,
> > I've been playing with the isosurface plugin, and trying out some things
I
> > found on various websites, most of which were apparently written for
> > MegaPov, and won't parse in PovRay3.5. The problem is, I havn't a clue
how
> > to change them to work with PovRay3.5. Here's an example:
> >
> > #declare Cracks = function { pigment{ crackle color_map{ [0 rgb 1][1 rgb
> > 0] }}}
> > function {(x*x+y*y+z*z-1) +Cracks(x, y, z)*0.5}
> >
> > Here's what Pov gives me:
> >
> >    File: isocrackle.pov  Line: 96
> >       (x*x+y*y+z*z-1) + Cracks( x, y, z )
> >
> >    } <----ERROR
> > Parse Error: Expected '.', } found instead
> > Returned from renderer with error status
> >
> > That doesn't make any sense to me. There are several others I've tried
> with
> > similar results. Does anyone know how to make this work?
> > Thank you,
> > Steve Shelby
> >
> >
> >
> >
> >
>
>

Post a reply to this message