Am 13.02.2011 15:29, schrieb Marco:
> I hqve the ewirdest thing: I copied a Round_Box_Union, but cannot give it a
> texture, like the round_box I copied it from. In the 2nd I get this error (note:
> only in the 2nd one, not the first! ???)
>
> Parse Error: Expected 'object or directive', texture found instead
>
> #declare listBox=union{
>          Round_Box_Union
> (
>          //<-7, 0.25, 6>  <-1, 1.25, -7>, 0.2)
>          <-7, 0.25, 6>  <-1, 1.5, -7>, 0.2)
>          texture {T_Gold_1A}
> }
>
>          Round_Box_Union
> (
>          //<-7, 0.25, 6>  <-1, 1.25, -7>, 0.2)
>          <-8.5, 0.25, 6>  <-7.5, 1.25, -7>, 0.1)
>          texture {T_Gold_1A}
> }
>
> This has worked before, before I added the 2nd Round_Box I did get a nicely
> rendered
> Round_Box, with fancy Gold_1A texture and all.

Jim already posted the proper solution; to understand what is happening, 
let's reformat your code to better see the structure (which is always a 
good idea when you get errors you don't understand):

#declare listBox = union {
     Round_Box_Union(<-7, 0.25, 6>  <-1, 1.5, -7>, 0.2)
     texture {T_Gold_1A}
     Round_Box_Union(<-8.5, 0.25, 6>  <-7.5, 1.25, -7>, 0.1)
     texture {T_Gold_1A}
}

Now recall that the Round_Box_Union macro evaluates to a union itself, 
so here's an outline of what your code evaluates to:

#declare listBox = union {
     union {...}
     texture {T_Gold_1A}
     union {...}
     texture {T_Gold_1A}
}

As you can see, the texture statements doen't pertain to each individual 
rounded box union - they pertain to your whole listBox union instead. 
Which is obviously not what you intended to do.

In this case, where the textures are identical, the solution is trivial: 
Just remove the first texture statement. However, if you need one of the 
boxes to have a different texture, you'll have to apply the textures to 
the individual boxes.

Obviously you can't add the textures to the Round_Box_Union in a 
straightforward way, as that's a macro. However, if you first assign the 
macro results to an identifier, the solution should be pretty obvious:

#declare MyRoundedBox1 = Round_Box_Union(...)
#declare MyRoundedBox2 = Round_Box_Union(...)
#declare listBox = union {
   object { MyRoundedBox1 texture {...} }
   object { MyRoundedBox2 texture {...} }
}

And, as Jim already demonstrated, the object statement doesn't 
necessarily require an identifier; you can instead insert full-fledged 
object descriptions there, e.g.:

object { sphere {...} ... }

This of course is pretty useless for verbatim object descriptions, but 
is pretty useful when using macros that expand to a full object 
description - as in your case:

#declare listBox = union {
   object { Round_Box_Union(...) texture {...} }
   object { Round_Box_Union(...) texture {...} }
}

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