code: def get_3rd_point(point_1, point_2):
      tmp_point = point_1 - point_2
      return point_2 + np.array(
          [-tmp_point[1], tmp_point[0]], dtype=np.float32
      )
  
imports: import cv2
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: get_3rd_point(point_1, point_2) and returns: unknown