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Coordinates axis
Posted: Thu Oct 08, 2009 8:15 am
by tregna
Hi all, does anyone know if you can report all marker coordinates respect to the global coordinates axis instead respect the local coordinates axis of particular bone where markers are applied.
Thank you
RE: Coordinates axis
Posted: Thu Oct 08, 2009 8:25 am
by cucho
Hey Daniele,
If you go to Point Kinematics under the analyze tool you can include each coordinate of interest. Run the analysis and the results will be given in a global reference frame.
Daniel
RE: Coordinates axis
Posted: Thu Oct 08, 2009 10:51 am
by tregna
Thank you Daniel; I'll try.
Daniele
RE: Coordinates axis
Posted: Mon Oct 12, 2009 6:26 am
by tregna
HI, I'll ask you if when I load marker data for measurement for scale model, coordinates must be previously transformed respect coordintes axis of the model. And do I do this trasformation myself or is there a tool for this purpose. Thank you
Daniele
RE: Coordinates axis
Posted: Mon Oct 12, 2009 9:39 am
by aymanh
Hi Daniele,
We assume that marker data (.trc) files are in the same frame as the model (all coordinates with respect to ground obviously). If the data needs to be transformed by applying rotations then you can use the "Transform" popup-menu in version 1.9.1. Any other transformation you'll need to do outside of OpenSim.
Hope that helps,
-Ayman