Hi,

I've been trying to display isosurface(s) from 3D data from a user specified
input file but with little success so far.

I've found the following solution:

#declare FUN = function {"data_3D_3",
     < LEVSCALE>, library "i_dat3d","input.dat",<NX+1,NY+1,NZ+1,0>}

 isosurface {
       function{FUN}
       bounded_by{box{<0,0,0>, <NX,NY,NZ>}}
       threshold -1
       max_gradient 1.000
       eval
       texture { pigment {color rgbt <1.0,0.20,0.0,0.8>} }
 }

where "input.dat" is the use specified file. This does not work (there is an
error message) and I suspect it might be because it is not in the standard
distribution of povray. Is that correct? Do you see any way to solve this
problem?

Thanks for your help,

Vincent

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nomail@nomail wrote:
> Hi,
> 
> I've been trying to display isosurface(s) from 3D data from a user specified
> input file but with little success so far.
> 
> I've found the following solution:
> 
> #declare FUN = function {"data_3D_3",
>      < LEVSCALE>, library "i_dat3d","input.dat",<NX+1,NY+1,NZ+1,0>}

Whoever told you this syntax was mistaken.  See the POV-Ray manual 
(under 'user defined functions' and 'density files') for the correct 
version.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 06 Jul. 2004 _____./\/^>_*_<^\/\.______

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Christoph Hormann wrote:

> nomail@nomail wrote:
> 
>> Hi,
>>
>> I've been trying to display isosurface(s) from 3D data from a user 
>> specified
>> input file but with little success so far.
>>
>> I've found the following solution:
>>
>> #declare FUN = function {"data_3D_3",
>>      < LEVSCALE>, library "i_dat3d","input.dat",<NX+1,NY+1,NZ+1,0>}
> 
> 
> Whoever told you this syntax was mistaken.  See the POV-Ray manual 
> (under 'user defined functions' and 'density files') for the correct 
> version.

I'm not sure, but maybe he is using a POV-Ray patch.
(E.g. Density_File Extension Patch)

-- 
Tor Olav
http://subcube.net
http://subcube.com

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Tor Olav Kristensen wrote:
>>>
>>> #declare FUN = function {"data_3D_3",
>>>      < LEVSCALE>, library "i_dat3d","input.dat",<NX+1,NY+1,NZ+1,0>}
>>
>>
>>
>> Whoever told you this syntax was mistaken.  See the POV-Ray manual 
>> (under 'user defined functions' and 'density files') for the correct 
>> version.
> 
> 
> I'm not sure, but maybe he is using a POV-Ray patch.
> (E.g. Density_File Extension Patch)

The DFE patch allows different file formats for density files but it 
does not introduce a new user defined function syntax.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 06 Jul. 2004 _____./\/^>_*_<^\/\.______

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in news:web.4107c8883f67bc4858bb41aa0@news.povray.org  wrote:

> This does not work (there is an
> error message) and I suspect it might be because it is not in the
> standard distribution of povray. Is that correct? 

Yes, the syntax is for a version of MegaPOV or the isosurface patch. It 
does not work with offical versions.

You can try the following unofficial version to reach your goal, not that 
it not uses your posted syntax: http://staff.aist.go.jp/r-
suzuki/e/povray/iso/df_body.htm

WWith an offical version of POV-Ray you have to turn your dataset into a 
density (*.df3) file. The structure of the file is descibed in the 
documentation.

Ingo

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In article <Xns9534C008A1E4Cseed7@news.povray.org> , ingo 
<ing### [at] tagpovrayorg>  wrote:

> Yes, the syntax is for a version of MegaPOV or the isosurface patch. It
> does not work with offical versions.

All versions supporting that kind of function syntax are about  tree years
out of date.  Current megaPOV versions only support the cleaned-up function
syntax as well.  The old mess of a function syntax will never again be
supported.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

Visit POV-Ray on the web: http://mac.povray.org

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