code: def rotate_by_phi_along_x(phi):
      tform = np.eye(4).astype(np.float32)
      tform[1, 1] = tform[2, 2] = np.cos(phi)
      tform[1, 2] = -np.sin(phi)
      tform[2, 1] = -tform[1, 2]
      return tform
  
file_path: pytorch3d/pytorch3d/implicitron/dataset/load_blender.py
imports: import json
  import os
  import numpy
  import torch
  from PIL import Image
label_desc: Use image node_id 2 for calling a global function with example usage: rotate_by_phi_along_x(phi) and returns: tform