code: def orthographic_project(vertices):
      """scaled orthographic projection(just delete z)
          assumes: variations in depth over the object is small relative to the mean distance from camera to object
          x -> x*f/z, y -> x*f/z, z -> f.
          for point i,j. zi~=zj. so just delete z
          ** often used in face
          Homo: P = [[1,0,0,0], [0,1,0,0], [0,0,1,0]]
      Args:
          vertices: [nver, 3]
      Returns:
          projected_vertices: [nver, 3] if isKeepZ=True. [nver, 2] if isKeepZ=False.
      """
      return vertices.copy()
  
file_path: insightface/python-package/insightface/thirdparty/face3d/mesh_numpy/transform.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import math
  from math import cos, sin
label_desc: Use image node_id 7 for calling a global function with example usage: orthographic_project(vertices) and returns: vertices