Re: [AL] Vector to angle ?

[Jason W. <fe...@io...>]

> >angle = acos(x / r)
> 
> I need a full circle angle, and there is no fixed point or very fast 
> version of this function.

Well, aren't we the lazy one today!

angle = ((y < 0)?(2 * M_PI):0) + acos(x / sqrt((x*x)/(y*y));

And, you don't need a faster function unless you are using a 386
or are doing this 2 million times a second.

> There is always one more bug.

I hate to disagree, but sometimes, there simply isn't ^_^