You could place markers on the points of interest, then run a forward dynamic simulation where you apply the activations (as excitations), disabling activation dynamics if you wish. You can use the Output Reporter ( https://simtk.org/api_docs/opensim/api_docs/classOpenSim_1_1OutputReporter.html ) to...

It depends on which OpenSim Tool you are using. If you're running Inverse Kinematics, for example, you can set the report_marker_locations property to True. Another method is described in Forum Topic 16938 (viewtopicPhpbb.php?f=91&t=16938).

The getComponentsList() method does not take an argument; it returns a list of all components and does not downcast. Here is an example use case (from test_access_subcomponents.py): num_components = 0 for comp in model.getComponentsList(): num_components += 1 There do not seem to be Python bindings ...

The error is of the form "GCVSpline: there must be # or more data points." This string can be found on line 99 of GCVSpline.cpp ( https://github.com/opensim-org/opensim-core/blob/ae4fcd2076cce6de9ca3d9c5a854cc72fc9b7841/OpenSim/Common/GCVSpline.cpp#L99 ). Presumably you are requesting a quintic spli...

what should i do to add the conditionnal pathpoint to the pathpointset of the muscle?

I think it would be something like this: I've used upd... methods here but the get... versions should work equally well in Matlab.

Based on the doxygen documentation ( https://simtk.org/api_docs/opensim/api_docs/classOpenSim_1_1ConditionalPathPoint.html#a5fbccc632d996235419c0313a8fa369b ), the ConditionalPathPoint::connectSocket_coordinate() method would be called by passing in a reference to the coordinate, something like this...

it is very strange that a lot of much more complicated models work fine with CMC I don't think it is so common to run CMC with a contact mesh and elastic foundation force. If it's possible for your application, you might try simplifying the problem by using a joint (or constraint) on the floor inst...

I want to simulate a system with changing forces over time depending on location and velocity If the forces are functions of time where the functions are known before the simulation begins, you could try using some other type of Function (expand the "Inheritance diagram for OpenSim::Function" at th...

You are correct: RRA should not be run over time intervals where GRFs were applied to the left foot in the experiment but were not measured.

Muscle activations are unitless and forces are expressed in newtons. Some additional information about the muscle models can be found on the "Muscle Model Theory and Publications" section of the documentation and the associated publications ( https://opensimconfluence.atlassian.net/wiki/spaces/OpenS...