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Re: atan2 and sqrt --> in driver

In article 
Robert Fritzsche <> 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))
>I know that I can place all these stuff in userspace, but it have
>place it into kernelspace, it's for studies.

You can use fixed point arithmetic in conjunction with cordic and/or table
based algorithms.


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