web.43c4e70d47b9b0fe72071f7b0@news.povray.org...
> Hello everybody,
>
> I need to understand exactly how can I specify in POV-RAY a
> user-defined-function...I read many guide and tutorial and I have 
> not
> understand if it's possible or not...for example: I need to define a
> function that take 3 parameters (a,b,c) and give in output sqrt
> (a^2+b^2+c^2)...Can somebody send me an example and tell me exactly 
> where I
> have to put this function's code in a povray source file?

#macro myFunction(a,b,c)
    sqrt(a*a+b*b+c*c)
#end



...
#declare foo=myFunction(3,4,5);

hope that help,
klp

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