Trajectory(.trc) from .mot file

In Bae Chung · Post by **In Bae Chung** » Mon Aug 19, 2019 10:17 am

Hi, everyone.

I have a .mot file but not a .trc file for a certain motion. I was wondering if it's possible to obtain .trc file from .mot file, or trajectory of a certain marker from a .mot file. Any help would be really appreciated.

Best,
In Bae Chung

Dimitar Stanev · Post by **Dimitar Stanev** » Tue Aug 20, 2019 1:15 am

You can perform PointKinematics analysis using the AnalyzeTool in the GUI.

https://simtk-confluence.stanford.edu:8 ... w/29165937

In Bae Chung · Post by **In Bae Chung** » Thu Aug 22, 2019 4:31 am

Thank you, that would work!

In Bae Chung · Post by **In Bae Chung** » Mon Oct 14, 2019 11:59 pm

I was able to obtain trajectory of a marker using Point Kinematics.
However, the numbers are very small compared to the numbers I would get from a .trc file and doesn't match at all.
Does the trajectory from Point Kinematics and .trc file have a different coordinate system?
I wonder if there's a another way to convert an existing .mot file into a .trc file.

Thank you.

Dimitar Stanev · Post by **Dimitar Stanev** » Tue Oct 15, 2019 2:57 am

The results from OpenSim are in meters. Probably, the .trc file is in millimetres. You can check by inspecting the header file of the .trc file.

Trajectory(.trc) from .mot file

Trajectory(.trc) from .mot file

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Re: Trajectory(.trc) from .mot file