Another way of Squaring?

[selig]

Is there another way to square root a function? Other then sqrt()? Thanks,

S

[floxy]

LookUp Tables.
But Finally it's the same.

-------------------

http://www.gamedev.net/community/forums/topic.asp?topic_id=278840

[selig]

Sorry I meant Square Root* Thanks for reply though.

[Lawgiver]

You mean another way to square a variable?


var*var? :D

[entername]

You mean another way to square a variable?


var*var? :D

That is the reverse of a square root?

[fibre]

why do you need a different way to sqrt whats wrong with that.

[Lawgiver]

That is the reverse of a square root?

hm ye youre right, i missunderstood something there.

why do you need a different way to sqrt whats wrong with that.

yes thats what im wondering too, you can be 99% sure that your implementation of sqrt will be slower than the one of the standard library. SO USE THE STANDARD LIBRARY.

[selig]

Yeah, I was just asking to know if there is a better/another way to do it. Just for extra information :). Thanks for replies though. Btw I know how to Square things. I was just looking for a another way.

[fibre]

you could try making a binary search.

so your basically creating your own sqrt function

[Lawgiver]

this is what i came up today :D

double my_sqrt( double number, int tries = 10 )
{
	double sqrt;
	double a1, a2;
	a1 = number;
	a2 = 1;

	for( int i = 0; i < tries; i++ )
	{
		a1 = ( a1 + a2 ) / 2;
		a2 = number / a1;
	}

	sqrt = ( a1 + a2 ) / 2;

	return sqrt;
}

pretty fast i guess and it uses heron's algorythm :D

Math Forum - Ask Dr. Math