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?

Thanks a lot,
Leo

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