code: def apply_camera_only3d(vertices, camera_params):
      camera_matrices = get_camera_matrices(camera_params)
  
      clip_space_vertices = transform_homogeneous(
          camera_matrices, np.array([vertices])
      )[:, 0:3]
  
      return clip_space_vertices
  
file_path: insightface/reconstruction/ostec/utils/ganfit_camera.py
imports: import numpy
  import math
label_desc: Use image node_id 10 for calling a global function with example usage: apply_camera_only3d(vertices, camera_params) and returns: clip_space_vertices