In article <41d436b0@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

>>kurtz le pirate <kur### [at] yahoofr> wrote:
>>>  - macro in pov is not the same as macro in c. there is no "code 
>>> substitution".
>>
>>  There is and there isn't. It's a bit complicated. See my other post
>>on the subject.

  yes you're right but in c, macro is for the pre-processor and c has 
real functions. in sdl pov, there is no "real" function.

  for exemple max() in c is a macro defined by
  #define max(a,b) (a>=b?a:b)

  when in c source there is a line like that :
  foo=max(big,small)

  before compiling, the pre-processor transforme the line to :
  foo=(big>=small?big:small)

  not the same mechanic than sdl pov as you say in your previous post.

  klp

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