math: x^y
BlitzMax Forums/BlitzMax Programming/math: x^y
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| Hi, is there a math function which can do power of (x^y)? I know i can make my own function but it would be much nicer if this would be supported by a built in function and i couldn't find it in the docs... Greetings, taumel |
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Local i, j i = 4 j = 5 Print i^j ' 4^5 = 1024 |
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| Oh man sorry... Silly me! This happens when you're switching between different tools too fast... :O\ Greetings, taumel |
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| Heh. Trust me, you're not alone. |
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| I always suspected that there have to be other dumb persons beside of me around... ;O) Greetings, taumel |
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| yeah like me ;) dont fret m8 we all do that at times, and just miss the answer even tho its in front of our face, i think its genetic to all programmers. |
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| Correct me if I'm wrong, but I thought Mark had said that x^y was unoptomized at the moment, and so x*x*x*x is faster than x^4. I don't know if a loop adds more overhead than the exponetial function, but if you are using large powers of y, you might want to consider a loop instead... |
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| well, if its x^2 then you should turn it manually to x*x, but if its x^2.5 then you should leave it like it is. |
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| Try these: X ^ 2.5 = X * X * \ X ^ 2.1 = X * X * ` X ^ 1.9 = X * x Let us know your results :) |
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| Ya x^2 is really slow in blitzmax, I wish it would get optimized because its annoying, and sometimes would run slower to put the same variable twice. Like (player\x-player2\x)^2 versus (player\x-player2\x)*(player\x-player2\x) |
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| this is prob the cause of the speed hit: x:int = 5 x^x: 24.999999999999996 x * x: 25 even if you are asking for the Square of in Integer, the ^ operator returns a Double. the * operator appears to work with whatever number type you give it |
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| bah, ^ is still so slow? sad :-( Luckily I didnt have to use it. Anyway sqr() is quite fast and you can always code your own power operator, at least for integer powers. |
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