Hugo wrote:
> 
> Hello friends,
> 
> I'm not sure wether this has already been adressed but I haven't read it.
> The following container won't work in isosurfaces:
> contained_by { box { <-1,1,-1>,<1,-1,1> }
> 
> But this one works:
> contained_by { box { <-1,-1,-1>,<1,1,1> }
> 
> I found that MegaPOV do the same, but I don't like it... Boxes can normally
> be described in any order I want; upside down or inside out.. This
> "restriction" seems illogical and is not found in "clipped_by" so just for
> making things more transparant for the users, this could be changed.. in my
> humble opinion.

The reason is that the box in the 'contained_by' statement is not the same
as the povray box shape.  It's just a way to describe the borders of the
isosurface with similar, but not necessarily identical syntax.  

NTL, it should be easily possible to fix this particular problem with a
minor change.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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