How to get the quaternions from coordinates in body and space frames : LUSENET : quaternions : One Thread

I have molecule coordinates in body-frame and in space-frame, but i need calculate the quaternions that related both systems, how do you get the queternions?

-- Florianne Castillo (, August 01, 2003


Hello Florianne:

There is no universally agreed on way to define a body-frame or space-frame. It is rare to find two books that define Euler angles the same way.

There is a good paper on the topic of swtiching between 3D systems and quaternions available at my web site. The paper requires a careful read, but it should address the question.


-- Douglas Sweetser (, August 03, 2003.

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