Can somebody point me to an example file .. or example files .. for an Iso
Surface.

Are there any limitations with file size ?

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In article <38dfb224$1@news.povray.org> , "David Vincent-Jones" 
<geo### [at] galaxynetcom> wrote:

> Can somebody point me to an example file .. or example files .. for an Iso
> Surface.
>
> Are there any limitations with file size ?

What file format?  Isosurfaces are POV-Ray scene objects, not a file format.


     Thorsten

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As I understand.......

An Iso Surface may be described through a "library" file rather than through
an object or formula.

That library file can take several formats..... would just like to have an
 or some ) examples(s) to play with.

Thanks;

David
Thorsten Froehlich <tho### [at] trfde> wrote in message
news:38dfdb05$1@news.povray.org...
> In article <38dfb224$1@news.povray.org> , "David Vincent-Jones"
> <geo### [at] galaxynetcom> wrote:
>
> > Can somebody point me to an example file .. or example files .. for an
Iso
> > Surface.
> >
> > Are there any limitations with file size ?
>
> What file format?  Isosurfaces are POV-Ray scene objects, not a file
format.
>
>
>      Thorsten

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In article <38dfeccc@news.povray.org> , "David Vincent-Jones" 
<geo### [at] galaxynetcom> wrote:

> An Iso Surface may be described through a "library" file rather than through
> an object or formula.

What you are referring to is capability of the original isosurface patch to
use dynamic link libraries (DLLs) which could supply additional external
functions as compiled code - if you want to create them, you need a compiler
for Windows.

> That library file can take several formats..... would just like to have an
>  or some ) examples(s) to play with.

All these functions (and a few more) are built into MegaPOV. You can find a
few examples on how to use them in the MegaPOV documentation. The basic
syntax is described in section "5.2.1. Function name of build in functions",
a few examples are in the sections following, for example "5.2.8. Accuracy"
shows the use of the torus function:

isosurface {
  function { "torus", <0.85, 0.15> }
  contained_by { box { <-1,-0.15,-1>, <1, 0.15, 1> } }
}

Please note that loading of external functions will not be available in
POV-Ray 3.5. It is unlikely that all (if any at all of) the current
functions that were previously external and are now built into MegaPOV will
be available in an official version.


    Thorsten

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David Vincent-Jones <geo### [at] galaxynetcom> wrote in message
news:38dfb224$1@news.povray.org...
> Can somebody point me to an example file .. or example files .. for an Iso
> Surface.
>
> Are there any limitations with file size ?
>
>

Are you asking about the data_2D_1, data_2d_3, data_3d_1, data3d_3
functions in MegaPov?
If so, there is an example in the demo package:
http://users.skynet.be/smellenbergh/demos.zip
I think the data file is called 'test1.dat' and the scene file using it is
i_funcdata.pov.

There is no intrinsic limit to the data file sizes, but I recall someone
telling
me at some point that there are limits to everything except everything
itself.

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