POV-Ray: Newsgroups: povray.general: How to use #ifdef?: How to use #ifdef?

POV-Ray : Newsgroups : povray.general : How to use #ifdef? : How to use #ifdef?		Server Time 19 Apr 2024 20:41:00 EDT (-0400)

From: Kima
Date: 12 Jun 2020 14:25:01
Message: <web.5ee3c827d247f9afecc0fada0@news.povray.org>

I have trouble to use #ifdef and #ifndef for multiple conditions. Can you
provide the correct syntax for the following cases:

1. #ifdef(a1) ...
   #else #ifdef(a2) ....
   #else ...

2. #ifdef(a1) & (a1=1) ...

3. #ifdef(a1) & #ifdef(a2) ...

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