(self, frame)
return root_vel
Get the root linear velocity from a frame.

    Args:
      frame: Frame from which the root linear velocity is to be extracted.

    Returns:
      Root linear velocity from the given frame.
Get the root linear velocity from a frame.
Get the root linear velocity from a frame .
def get_frame_root_vel(self, frame):
    """Get the root linear velocity from a frame.

    Args:
      frame: Frame from which the root linear velocity is to be extracted.

    Returns:
      Root linear velocity from the given frame.

    """
    root_vel = frame[:self.VEL_SIZE].copy()
    return root_vel
def get_frame_root_vel ( self , frame ) : root_vel = frame [ : self . VEL_SIZE ] . copy ( ) return root_vel