Define the foot segments using the anterior-posterior axis LHEE/RHEE to LTOE/RTOE as their major axes.
Note that the minor axis in CGM is not yet defined in CGM2.3: this is added in the next version (CGM2.4). (This can also be implemented in ProCalc, but is not part of this tutorial.)
To define the feet:
- Create two vectors, LFootAP and RFootAP, from LHEE/RHEE to LTOE/RTOE.
- Create two segments, L_Foot and R_Foot, using Origin A, X-axis=B, Z-Axis=BxC, specifying A=LAJC/RAJC, B=LFootAP/RFootAP and C=LTibiaML/RTibiaML.
When defining the L_Foot, flip the LTibiaML.
Tip
To define foot flat for the static trial, when defining the feet, change the XYZ drop-down for the LFootAP/RFootAP and LTibiaML/RTibiaML vectors to XY instead of XYZ.
The Z-coordinate of the vectors is ignored, and the foot is modeled as flat on the ground in the static trial.
To define foot flat for the static trial, when defining the feet, change the XYZ drop-down for the LFootAP/RFootAP and LTibiaML/RTibiaML vectors to XY instead of XYZ.
The Z-coordinate of the vectors is ignored, and the foot is modeled as flat on the ground in the static trial.
