Re: atan2 and sqrt --> in driver

["Andy Shevchenko" <andy.shevchenko%gmail.com@localhost>]

On Tue, Dec 9, 2008 at 7:01 PM, Robert Fritzsche
<robert.fritzsche%googlemail.com@localhost> wrote:
> The driver is for the wii-remote, so get 1 byte for x-, y- and z-axis.
> Based on this values I will calculate the pitch = atan2(y,
> sqrt(x^2+z^2)) and yaw = atan2(z, sqrt(x^2+y^2))
You could use approx evaluations.
Set tables with some 32bit predefined values (hint: you can use 32 bit
value as float with integer and fraction parts).

Actually, to calculate sqrt you need the precalculated the n^2, for n
= 2, ..., 99, ...

Just found one link in Google
http://www.homeschoolmath.net/teaching/square-root-algorithm.php


-- 
With Best Regards,
Andy Shevchenko