I am using 3.1 still.  I will try what you suggested with 3.5.

Thanks!
Kevin

"JRG" <jrg### [at] hotmailcom> wrote in message
news:3bdc1656@news.povray.org...
> Hmm, let's see if I've understood you:
> you have a macro called F (X,Z) defined as follows (I guess):
> F (X,Z)
>
> *expression with X and Z*
>
> #end
>
> Then you have another macro you want to pass F to it as a parameter (but
you
> don't want it to be F(X0,Y0) where X0 and Y0 are predefined values).
> Then I guess you want to evaluate F inside the second macro.
>
> Are you using POV 3.5? If that's the case why don't you simply define the
> function inside the second macro?
> i.e:
>
> #macro Macro1()
> #declare F=function (X,Z) { *expression with X and Z*}
>
> and then you can evalute F inside the macro.
>
> --
> Jonathan.
>
> "Kilgore Trout" <lou### [at] hotmailcom> ha scritto nel messaggio
> news:3bdc11b0$1@news.povray.org...
> > That's sort of different from what I'm tring to do.  I'm trying to make
a
> > macro that can make a graph of surfaces defined by Y = F(X, Z), and I
want
> > to pass F(X, Z) as a parameter to the macro.  But not just one value of
F,
> I
> > want to be able to pass the function F, so I can call it several times
> > inside of the macro.  If this isn't clear, then I can post my code so
you
> > can see what I have so far and what I'm trying to get.  Right now I am
> > declaring F outisde of the graph macro, but this is no good because I
> might
> > want to use two different F's in one scene.
> >
> > Thanks,
> > Kev
> >
> > "JRG" <jrg### [at] hotmailcom> wrote in message
> > news:3bdc0e92@news.povray.org...
> > > First you define your two macros, then you can use one as a parameter
> for
> > > the other one:
> > >
> > > example (not tested)
> > >
> > > #macro SQUARE (A)
> > > A*A
> > > #end
> > >
> > > #macro INCR (B)
> > > B+1
> > > #end
> > >
> > > #declare c=SQUARE ( INCR (2) ); // it should give you (2+1)^2=9
> > >
> > >
> >
> >
>
>

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