POV-Ray : Newsgroups : povray.unofficial.patches : Macros, includes and memory management : Re: Macros, includes and memory management Server Time
1 Sep 2024 18:13:30 EDT (-0400)
  Re: Macros, includes and memory management  
From: Jérôme Grimbert
Date: 19 Dec 2000 09:05:54
Message: <3A3F6B66.5E42C721@atos-group.com>
Geoff Wedig wrote:
> 
> Well, I've run up against a problem.  In Megapov, you can't define macros
> within macros, which doesn't seem to be a big deal, except for what I'm
> trying to do.  See, I've written a general engine for doing certain kinds of
> manipulations.  To make it general, I define several macros that the engine
> calls, thus allowing me to change the macros externally.  However, now I
> want to use the engine inside a macro.  Oops!  I can't define the
> appropriate bits, because they're macros, and you can't define macros within
> macros.  So I have to define them externally to the macro which uses them.
> However, I have several macros, each with different parameterizations, and
> they're called from a different file.  Now that file has to define a whole
> bunch of stuff before calling the appropriate macro.  Not exactly useful
> behavior.
> 
> Now, these macros simply calculate floating point numbers.  I considered
> using functions, but that didn't work as I could not evaluate the functions
> at the points I wanted.  One macro evaluates to a material/texture, but I
> can forgive that one being a little odd if I could get the others to work.
> 
> So, any of you Megapov gurus got any ideas?  I this this is an unsolveable
> limitation in the program, but maybe someone else has found a way around it.
> Is there any way to turn off the memory management feature that limits the
> macro declarations, maybe?  It wouldn't be ideal, but it would work.
> 
> Thoughts?
> 
> Geoff

Not a guru, but a though: have your engine macros generated in a file then
include that file...
So, first use your engine, next get the result of it for use,
instead of doing all at once.


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