Euler Angles from rotation matrix
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Hello
I'm new to biomechanical analysis, maybe my questions are a little bit silly. I'm sorry.
I have built an orthogonal coordinate system at the ankle with three vectors and the origin O. Now, when I move the ankle, the vectors will point in a different direktion. I want to get the angles whicht describe this rotation. The first rotation is arround the Z-Axis, then the Y-Axis and the last arround the floatig axis which ist perpendicular to the Z and Y-axis.
Could someone help me with that?
And a second question: The position of the ankle changes also. But I think that doesn't matter for the orientation of the coordinate system. Right? I will need the position change for the calculation of the angle speed.
Thank you in advance.
Best wishes, Oliver
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