root rotation of xz axis

[Ying156209]

Hi, I'm curious about the root rotation recovery.
the recovery of root rotation use rot_vel = data[..., 0] in function recover_root_rot_pos(), which is calculated by r_velocity. This is delta_theta/2.0 as I understand, which has no XYZ (axis) information in it. I wonder how this representation represents the rotation in other axes（like XZ).

[EricGuo5513]

Hi,

For HumanML3D, we only consider the root rotation along Y-axis. XZ rotations in our case would be more complicated.

GY156209 @.***> 于2023年3月7日周二 21:31写道：

Hi, I'm curious about the root rotation recovery. the recovery of root rotation use rot_vel = data[..., 0] in function recover_root_rot_pos(), which is calculated by r_velocity. [image: image] https://user-images.githubusercontent.com/34014097/223613924-f57a898f-a714-4a8a-8f39-232d35d5347b.png This is delta_theta/2.0 as I understand, which has no XYZ (axis) information in it. I wonder how this representation represents the rotation in other axes（like XZ).

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