data = KINEMATICS_DATA(data,settings) computes global and lower-limb
joint angles based on the joint coordinate system of Grood and Suntay (1983)
ARGUMENTS
data ... Zoo data
settings ... Settings control (struct) with the following fields:
'graph' (boolean). Graph comparisons agains Vicon. Default, false
'comp' (boolean). Vicon vs BiomeZoo RMS diff (if available). Default, true
RETURNS
data ... zoo data appended with kinemaitc channels
NOTES:
- PiG
* choice of segment embedded axes for angle computation based on work of
Vaughan (Dynamics of Human Gait 1999, Appendix B p94-96).
* Lower limb PiG outputs of this function have been validated
(see Fig4.ppf and Supplemental Fig2.pdf in ~\biomechZoo-samplestudy\Figures\manuscript\
* Head angles are not offset by static posture (PiG angles use static offset)
- OFM
* choice of segment embedded axes was based on trial and error, comparing
results to Vicon outputs.
* Grood and Suntay approach is implemented
- Belfast Pelvis
* Belfast pelvis angles based on Baker 'Pelvic angles: a mathematically rigorous
definition which is consistent with a conventional clinical understanding of
the terms'. Gait Posture. 2001 Feb;13(1):1-6. doi: 10.1016/s0966-6362(00)00083-7.
- A correction for vector flips near 90 degrees has been implemented at the knee,
and BelfastPelvis but might require future updates (see 'checkflip_pyCGM')
See also makebones_data, bmech_kinematicsPiG, bmech_jointcentrePiG