"Stefan Viljoen" <ryl### [at] intekomcoza> wrote in message 
news:41547b10@news.povray.org...
>
> All this code does is to produce a solid white box, sized -1 1 
> (obviously).
> Changing the values sent to f_mesh1 has no effect - from very small to 
> very
> large still just produce a solid white box.
>
> How can I get a mesh with f_mesh1? What am I doing wrong? I've never used
> isosurfaces before.

Hi there Stefan.

And I'm new to f_mesh1(), not having used it anytime, that I know of.

Use first three values as x,y,z instead of 1,1,1, since each 1=x*y*z.

Looks like the threshold should be greater than zero, yet not much over 
zero. I tried the following and it looked right to me, although I'm not 
exactly sure what it should look like.
:-)

#include "colors.inc"
#include "functions.inc"

light_source {<-5,10,15>,1}

camera
{
        location <1,2,3>
        look_at <0,0,0>
}

isosurface
{
        function {f_mesh1(x,y,z,0.1,0.2,0.05,0.15,0.15)}
        threshold 0.005
  max_gradient 0.5
        contained_by
        {
                box {-1,1}
        }

        material{texture{pigment{color White}}}
}

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