Thanks for the answer Tom. It looks better using setStateVariableValues(). I have a related question though: I am using calcResidualForceIgnoringConstraints() to get my ID torques. However, it seems that the order of the residualMobilityForces (output) does not correspond to the order of the states ...

Hi, I am having a similar "issue" with OpenSim 4.0. I built the gait2354 model from scratch through the C++ API and then called getStateVariableNames() to get the order of my states. I obtained, as expected, the state names in the same order as the order I used when adding the joints to my model. Ho...

Great, I will read that.
Thanks very much!

Hi Sherm, thanks for the quick reply. Actually, I am not really using that OpenSim code, it was for the sake of the example. I am trying to have a smooth implementation of the Hunt Crossley contact model to use it with auto diff. Since we have not implemented auto diff in the entire Simbody yet, we ...

Hello, I am playing around with the Hunt Crossley model in Simbody. I am trying to understand what would be the value of s1 in the following equation: const Real s1 = param2.stiffness/(param1.stiffness+param2.stiffness); (see https://github.com/simbody/simbody/blob/master/Simbody/src/HuntCrossleyFor...

Thanks Chris!

Hi, I would like to know which optimizer is used when solving inverse kinematics in OpenSim 3.3. I found this post on the forum but I would like to make sure it is still up to date. "In OpenSim/Simbody the inverse kinematics solver uses different optimization algorithms depending on the problem. If ...

I have another question related to the low pass filter used in the InverseDynamicsTool. If I am right, the filter is a dual pass 3rd order filter. Is it thus right to say that, due to the dual pass, the effective cutoff frequency is lower than the selected cutoff frequency? This follows what is disc...