code: def angvel(target, current, scale):
      '''Use sigmoid function to choose a delta that will help smoothly steer from current angle to target angle.'''
      delta = target - current
      while delta < -180:
          delta += 360;
      while delta > 180:
          delta -= 360;
      return (old_div(2.0, (1.0 + math.exp(old_div(-delta,scale))))) - 1.f angvel(target, current, scale):
      '''Use sigmoid function to choose a delta that will help smoothly steer from current angle to target angle.'''
      delta = target - current
      while delta < -180:
          delta += 360;
      while delta > 180:
          delta -= 360;
      return (old_div(2.0, (1.0 + math.exp(old_div(-delta,scale))))) - 1.0
docs: Use sigmoid function to choose a delta that will help smoothly steer from current angle to target angle.