docs: def reorient(self, up, look):
          '''
          Reorient the mesh by specifying two vectors.
  
          up: The foot-to-head direction.
          look: The direction the body is facing.
  
          In the result, the up will end up along +y, and look along +z
          (i.e. facing towards a default OpenGL camera).
  
          '''
          from blmath.geometry.transform import rotation_from_up_and_look
          from blmath.numerics import as_numeric_array
  
          up = as_numeric_array(up, (3,))
          look = as_numeric_array(look, (3,))
  
          if self.v is not None:
              self.v = np.dot(rotation_from_up_and_look(up, look), self.v.T).T