Gena wrote:

> I need a cylindrical heightfield from my bitmap.
> The following code doesn't work:
> 
> #include "shapes.inc"
> 
> #declare F = function {
>    pigment {
>       image_map {
>           png "foo.png"
>         map_type 0
>       }
>    }
> }
> 
> object {
>    HF_Cylinder (F, off, off,
> <60,60>, on, "", <0.5, 0.0, 0.5>, <0.5, 1.0, 0.5>, 0.4, 0.3)
>    texture {
>       pigment {color rgb 1}
>    }
> }
> 
> How can I make it work? Is there any other macro(s)
> making cylindrical heightfield or cylindrical mesh
> from bitmap?
> 
> Gena.


I was just listing a bunch of things I thought _might_ be the problem, 
but I'm 99% sure what the problem is now. Where you have "HF_Cylinder (F 
", try making it "HF_Cylinder ( function{ F(x,y,z).grey } "

This macro demands you put the function inside a function{... } block. 
Since you have declared a pigment as a function, you have to add the 
".grey" to the end of the invoked function. I think that might be what 
Bob was saying....

Here's what it will actually look like, in case the above was confusing:

HF_Cylinder (
  function{ F(x,y,z).grey } , off, off,
  <60,60>, on, "", <0.5, 0.0, 0.5>, <0.5, 1.0, 0.5>, 0.4, 0.3
)


Hope this helps!

-Sam

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