Hi David, thank you a lot for your reply. I agree that the PIG needs 3 markers per segment to compute the kinematics. However, as it can be seen in the corresponding vicon skeleton template (.vst file) these markers are not necessary real. PIG modeling takes the real marker trajectories and generate...

Hi there, I am a new user of OpenSim. I read that OpenSim needs at least three markers to track the 6dof motion of a body segment. If this is not the case (i.e marker set of Vicon PlugIn Gait does not fulfill this requirement), the results from OpenSim IK and ID can be valid or are by definition inc...