Marker's visualisation, .trc vs. .mot
Posted: Wed Mar 21, 2012 1:51 am
Hi everybody,
I have just started with the OpenSim, and I would like to make some parts of the modeling/simulation process clear. So far, I went through the OpenSim manual, the SIMM manual and the forum, but with something I am still confused.
1) What is the difference between .trc and .mot files? As I understand it, the .trc file contains the positions/trajectories of the markers (which I can get with motion capture) and the .mot files the kinematics (angles, etc) and the external forces. So, if I only want to visualize the motion, which I have from the motion capture recording, the .trc files should be enough? Then, if I have the model with the markers I can use the “File preview motion data” and it should work? (actually, it is not, but maybe I have some errors in the trc file).
2) Is there a way to visualize the marker set in the model without running IK? What if I have several marker sets and I forgot which one is which (how individual marker sets are positioned). I need to choose the best marker set for the current motion capture session. So I want to see which marker set is the closest one / the best on.
Thank you for any information.
Michala
I have just started with the OpenSim, and I would like to make some parts of the modeling/simulation process clear. So far, I went through the OpenSim manual, the SIMM manual and the forum, but with something I am still confused.
1) What is the difference between .trc and .mot files? As I understand it, the .trc file contains the positions/trajectories of the markers (which I can get with motion capture) and the .mot files the kinematics (angles, etc) and the external forces. So, if I only want to visualize the motion, which I have from the motion capture recording, the .trc files should be enough? Then, if I have the model with the markers I can use the “File preview motion data” and it should work? (actually, it is not, but maybe I have some errors in the trc file).
2) Is there a way to visualize the marker set in the model without running IK? What if I have several marker sets and I forgot which one is which (how individual marker sets are positioned). I need to choose the best marker set for the current motion capture session. So I want to see which marker set is the closest one / the best on.
Thank you for any information.
Michala