data = jointcentreStiefDynamic_data(data,joint,mkr_lat,vecStatic)
computes knee and ankle joint centres based on medial marker and vector
pointing to joint centre (computed using static trial with medial markers)
ARGUMENTS
data ... zoo data struct to operate on
joint ... name of joint ('Knee' or 'Ankle')
mkr_lat ... lateral joint marker (lateral e.g. 'KNE' or 'ANK')
vecStatic ... Vector pointing from mkr_lat to joint centre (expressed in
global coordinate system, displaced to origin). This vector
is added to the position of the dynamic trial mrk_lat
to obtain the dynamic positions of the joint centre
during movement trials
RETURNS
data ... zoo data with joint centre virtual markers appended
('R/LKnee/AnkleJC')
NOTES:
- Algorithm: Joint centres set as midpoint between 'mkr_lat' and 'mkr_med'.
See Stief et al. "Reliability and Accuracy in Three-Dimensional Gait Analysis:
A Comparison of Two Lower Body Protocols". J App Biomech. 2013.
See also jointcentreStiefStatic, bmech_kinematics