code: def get_angle(self, array):
      x1, y1, x2, y2 = array
      a_x = x2 - x1
      a_y = y2 - y1
      angle1 = math.atan2(a_y, a_x)
      angle1 = int(angle1 * 180 / math.pi)
  
      a_x = x2 - x1 if y2 >= y1 else x1 - x2
      a_y = y2 - y1 if y2 >= y1 else y1 - y2
      angle2 = math.atan2(a_y, a_x)
      angle2 = int(angle2 * 180 / math.pi)
      if angle2 > 90:
          angle2 = 180 - angle2
  
      return angle1, angle2
  
file_path: PaddleDetection/deploy/pipeline/ppvehicle/vehicle_retrograde.py
imports: import numpy
  import math
label_desc: Use image node_id 3 for calling the VehicleRetrogradeRecognizer obj's underlying member method code with example usage: obj.get_angle(array) and returns: angle1,  angle2