code: def _line(p1, p2):
      A = p1[1] - p2[1]
      B = p2[0] - p1[0]
      C = p1[0] * p2[1] - p2[0] * p1[1]
      return A, B, -C
  
file_path: PaddleSeg/EISeg/eiseg/util/regularization/rs_regularization.py
imports: import math
  import cv2
  import numpy
  from .utils import calc_distance
label_desc: Use image node_id 9 for calling a global function with example usage: _line(p1, p2) and returns: A,  B,  unknown