"TheMightyZog" <Chr### [at] HotPOPcom> wrote:
> Thanks tgq, but
>    rotate<(degrees(atan2(1,2))),0,0>
> is not exactly the same as
>   rotate<30,0,0>
>  - it is a little off as I suspect it is using the arc of a radian circle
> instead of straight lines

Of course this isn't the same.  the arctan of 1/2 is ~28.6 degrees not 30.
I.e., the tan of 30 is not 1/2, it's 0.577, you are thinking of sin(30)
which is O/H not O/A:

rotate<(degrees(asin(1/2))),0,0> = rotate<30,0,0>


-tgq

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