Please help. Thanks.

]]>expr sqrt ( $f1*$f1 + $f2*$f2 + $f3*$f3 )

is the most efficient way to go.

]]>Rule of thumb #1: if one mathematical operation is harder for you to carry out, it’s almost always more CPU intensive for the computer. Since pow() is a general-purpose exponentiation that can handle exponents with fractional components, it has to take logarithms and all that sort of junior high school math stuff. Multiplication–even long multiplication–is something that you mastered (or ought to have mastered;-) in elementary school.

Rule of thumb #2: don’t worry much about this in Max unless you’re noticing real performance issues.

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