Given two vectors, there is not a unique solution of euler-like angles that
you can solve for that relates the two vectors. If you have a desired set
of axes to rotate about you can formulate three non-linear equations from
the transformation. You'll like have to solve this numerically though, with
a good initial guess. I don't think solving it analytically is trivial (or
necessarily possible).
Jason
moorepants.info
+01 530-601-9791
On Sat, Sep 29, 2018 at 2:43 AM Andrea Danzi <andrea....@gmail.com> wrote:
> I did this way:
>
> - calculate the angle between vector1 and vector2
> - rotate around the axis defined by vector1.cross(vector2)
>
> v_cross = vect1.cross(vect2)
> v_dot = vect1.dot(vect2)
>
> if v_dot == 0:
> v_angle = pi/2.
> else:
> v_angle =acos( v_dot / ( vect2.magnitude()*vect_base.magnitude() ) )
>
> R = N.orient_new_axis('R', v_angle,v_cross)
>
>
>
>
>
>
>
> Il giorno sabato 29 settembre 2018 10:58:22 UTC+2, Andrea Danzi ha scritto:
>>
>> I need to instantiate a BodyOrienter that rotates the axis of my "Body"
>> parallel to a given arbitrary vector.
>> How can I calculate the three successive angles required to rotate the
>> coordinate system parallel to the given vector?
>> ---
>> Andrea
>>
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