Pelvis_tx, ty, tz location.

New project for OpenCap, which is a new software package to estimate 3D human movement dynamics from smartphone videos. OpenCap strongly relies on OpenSim.
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Juan Pablo García Muñoz
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Joined: Mon Oct 03, 2022 11:28 am

Pelvis_tx, ty, tz location.

Post by Juan Pablo García Muñoz » Sat Jun 22, 2024 7:07 am

Hello, hope you are all well,

I have been doing some test in OpenCap, I have process all the data in python and all is working well, I am looking now to plot the Pelvis_ty, Pelvis_tx, and Pelvis_tz, but I can't find in the code where those markers are.
I would appreciate any help on this.

Kind Regards.

JP

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Matt Petrucci
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Joined: Fri Feb 24, 2012 11:49 am

Re: Pelvis_tx, ty, tz location.

Post by Matt Petrucci » Tue Jun 25, 2024 12:10 pm

Hi Juan,

Pelvis_tx, ty, and tz should be in the .mot file. Do you not see them there?

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Juan Pablo García Muñoz
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Joined: Mon Oct 03, 2022 11:28 am

Re: Pelvis_tx, ty, tz location.

Post by Juan Pablo García Muñoz » Mon Jul 08, 2024 2:16 pm

Hi Matt,

Thanks for your previous answer, i found them!

I have another question, I know the body CoM it would be very similar to Pelvis Segment, but it is calculated differently am I rigth?, if so, is there a way to know how it is calculated the COM? Is the weighted sum of different COM segments? or another thing.

Thanks a Lot

Best regards!

Juan Pablo

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Matt Petrucci
Posts: 185
Joined: Fri Feb 24, 2012 11:49 am

Re: Pelvis_tx, ty, tz location.

Post by Matt Petrucci » Tue Jul 09, 2024 11:28 am

Hi Juan Pablo,

Great! Yes, we have some example code for getting the COM kinematics here: https://github.com/stanfordnmbl/opencap ... sis.py#L43

Hope this helps,

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