Hello, Typically frames are placed on other frames to form a chain, and the GUI shows the relative translation/rotation between a frame and its "parent" frame. However there are API methods that you can call to compute the transformation between any pair of frames, and then to decompose into transla...

Thanks Dan for the help and Finn for reporting.

Finn, if you can post the setup file and relevant info from the data files that would be useful so we can try to give more informative messages to help troubleshooting in the future.

Best regards,
-Ayman

Hi Avery,

You should be all set, just keep in mind that we have two different conda packages opensim and opensim-moco, just make sure you pick the one that meets you need (since you mentioned you're new to Moco).

Best regards,
-Ayman

Hello, The likely reason for this is a discrepancy between the units used for OpenSim model (default to meters) and the prosthesis. Please make sure you convert the prosthesis into meters before importing. For the geometry mesh files this usually can be done by applying a scale factor in OpenSim rat...

Hello Ruth,

Please refer to the forum thread below for discussion/suggestions to resolve this issue.

viewtopicPhpbb.php?f=91&t=13900

Best regards,
-Ayman

Hello, Assuming you're working with the API in Matlab (based on your post tags), you can create a TimeSeriesTableVec3 from the marker data then extract a specific column using getDependentColumn(columnLabel) I suggest you check the documentation here https://simtk-confluence.stanford.edu/display/Ope...

Hello Avery,

If using Anaconda, we strongly recommend you do not use the manual installation steps but the conda specific instructions here
https://simtk-confluence.stanford.edu/d ... da+Package
and here
https://anaconda.org/opensim-org/opensim

Please let us know how that goes,
-Ayman

Hi Owen, Few comments on the posted code: 1. Please do not use "updCoordinateSet()", and use "getCoordinateSet()" instead. The value of the coordinate is not kept with the coordinate but in the state, as such the Coordinate object is const, this may not make a difference here but a general rule to b...

Hi Rodrigo, To answer your questions: 1. Definitely, the job of IK is to find coordinate values that position the model to match as close as possible the orientation of the "placed" IMUs with the measured orientations in provided input files/tables. 2. You can see the orientation of the placed IMUs ...

Hello, First I would recommend replacing model.updCoordinateSet() with model.getCoordinateSet() as your code doesn't change the coordinate objects themselves but the values of the state variables maintained by the coordinates, these live in the state object. Using upd methods could have undesirable ...