code: def head_pos_to_trans_rot_t(quats):
      """Convert Maxfilter-formatted head position quaternions.
  
      Parameters
      ----------
      quats : ndarray, shape (N, 10)
          MaxFilter-formatted position and quaternion parameters.
  
      Returns
      -------
      translation : ndarray, shape (N, 3)
          Translations at each time point.
      rotation : ndarray, shape (N, 3, 3)
          Rotations at each time point.
      t : ndarray, shape (N,)
          The time points.
  
      See Also
      --------
      read_head_pos
      write_head_pos
      """
      t = quats[..., 0].copy()
      rotation = quat_to_rot(quats[..., 1:4])
      translation = quats[..., 4:7].copy()
      return translation, rotation, t
  
imports: import copy
  import itertools
  from functools import partial
  import numpy
  from scipy.linalg import orth
  from scipy.optimize import fmin_cobyla
  from scipy.spatial.distance import cdist
  from ._fiff.constants import FIFF
  from ._fiff.meas_info import Info, _simplify_info
  from ._fiff.pick import _picks_to_idx, pick_channels, pick_channels_regexp, pick_info, pick_types
  from ._fiff.proj import Projection, setup_proj
  from .channels.channels import _get_meg_system
  from .cov import compute_whitener, make_ad_hoc_cov
  from .dipole import _make_guesses
  from .event import find_events
  from .fixes import jit
  from .forward import _concatenate_coils, _create_meg_coils, _magnetic_dipole_field_vec
  from .io import BaseRaw
  from .io.ctf.trans import _make_ctf_coord_trans_set
  from .io.kit.constants import KIT
  from .io.kit.kit import RawKIT
  from .preprocessing.maxwell import _get_mf_picks_fix_mags, _prep_mf_coils, _regularize_out, _sss_basis
  from .transforms import _angle_between_quats, _fit_matched_points, _quat_to_affine, als_ras_trans, apply_trans, invert_transform, quat_to_rot, rot_to_quat
  from .utils import ProgressBar, _check_fname, _check_option, _on_missing, _pl, _validate_type, _verbose_safe_false, logger, use_log_level, verbose, warn
label_desc: Use image node_id 3 for calling a global function with example usage: head_pos_to_trans_rot_t(quats) and returns: translation,  rotation,  t