Greg M. Johnson wrote:


 Oi vey!  Too much late-night coding, I guess.  :-S

Yes, that's an abs() function.  I wanted a sign() function and so was
writing my own.

Perhaps it was late-night delusions, but I did think that povray 3.5 (the
apt-get version) was freaking with me when it came to nested function/macro
calls. 


> I cannot get the following code to work:
> 
> //-----------------------------
> #macro sign(a)
> #if (a<0)
>         (-a)
> #else
>         (a)
> #end
> #end

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