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05-02-2005, 09:44 PM
Dear all,

I am currently doing a masters at the University of Strathclyde and have
encountered a problem using BodyBuilder for Biomechanics modelling software.
The model that I have written performs kinetic and kinematic operations on
the lower limbs during walking.

One segment which I have created represents a small device which is attached
to the subjects' thigh. To this device I have attached a local axis system.

The ouptut that I wish to gain is the orientation of this local X,Y,Z to the
global X,Y,Z, at all time points recorded. If I understand this correctly I
should then get 9 numbers:

- 3 describing the local X about the global X,Y,Z

- 3 describing the local Y about the global X,Y,Z

- 3 describing the local Z about the global X,Y,Z

If anyone has any thoughts on how I might acheive this, or can point me in
the direction of any resources that might help me, I would greatly
appreciate it.

Thank you in advance for your help.

Best Regards,

Andy Murphy