Is the first 3 dims in rotmat npy used in the project?

[RipeMangoBox]

Thank you, Siyao, for presenting such an outstanding work!
I have a query regarding rotmat npy data.

According to _prepare_motion_data.py, a rotmat npy is of the shape (T, 498), where T represents the frame_length and 498 represents 3 dimensions of 'transl' in smplx and 55*9=495 dimensions of the rotation matrix. I am inquisitive as to whether the initial 3 dimensions of a rotmat npy file are utilized in the project.

Thank you for your consideration!