In article <3b5b8127$1@news.povray.org> , "Dennis Milller" 
<dhm### [at] mediaonenet> wrote:

> so even if it is simply defining the limits of the isosurface, which I
> understand, I wonder why you can't apply scale, rotate, or other
> transformations to the container.

It is just a limitation as people have pointed out before.  Historically
there were bugs when transforming isosurfaces (as I pointed out before).  As
Warp pointed out, those have been fixed and now this limitation is still
there.  MegaPOV simply contains a lot of code that is still in development.
It is the way it is until it is changed.

> The second question is why other shapes besides the box and sphere can't be
> used; does anyone know the history/reasoning behind that?

Simplicity of the language and isosurface implementation.  Internally an
isosurface is only calculated if a ray intersects its simple container.  For
everything else use CSG because complex intersections are the domain of CSG,
not isosurfaces.


    Thorsten


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

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