Thanks a lot

Vignesh

If it is possible to share the code, it would be really helpful.

I rewrote aspects of pycgm2 in MATLAB for my application but the results are not very consistent so I was trying to use Simbody (via OpenSim) for the same.

Thanks

Hello Ton van den Bogert,

Thanks for the reply. Just to confirm IK would give a similar residual error and rotation matrix compared to if you use a svd or eigen value method if the joints are 6 dof?

Thanks

Hi,

Thanks. I tried it but it doesnt seem to work. additionally I get an error " Labelled as translational but was found to be coupled opensim"

Not sure how to proceed

Hi,

I would like to apply segmental kinematic optimisation such as Sodervisk, Cheze etc to calculate joint kinematics. I know how to specify a 6 DoF joint between two segments but how do I apply the above algorithms? Are there any use cases or examples?

Thanks

Hi,

I do call the function but I still get the error. In the osim file, there is no parent frame but socket parent frame. Is that an issue ?

Hi, Yes thank you. I wanted to determine how much each marker moves in their respective body reference frame (definition of STA) but in OpenSim it remains the same ( I assume due to rigid body assumption). Is there a way to check which transformation matrix is bad? For example, residual error is hig...

So is the transformation matrixes of the body reference frame change from time instant to time instant ?

Hi, I am trying to access or transform a marker from global coordinate system to body-frame reference. Unfortunately when I call functions such as marker.getParentFrame(), marker.getLocationInGround(state) etc, in the inverse kinematic step, it always throws an exception. The errors I get state: Inv...

Hi,

Thanks. I tried the get_location() function but the output is always constant.

Thanks