simtk.org

Hi, i was going through thec3dexport.m Matlab code. so while i went through the code i was not able to understang why the data is being rotated by 90 degrees

The data are being rotated because the "lab" frame (the frame with respect to which the C3D data are expressed) has a different orientation than the "Ground" frame in OpenSim (where the Y-axis points up). There may be some additional information in the "Preparing Your Data" section of the documentation: https://simtk-confluence.stanford.edu:8 ... +Your+Data.