def _is_relevant(self, new_car_pos, car_speed, old_car_pos, new_ambu_pos,
ambu_speed, old_ambu_pos):
'''Takes in the car and the ambulances current and previous postition.
Returns whether the car should be notified or not, as a boolean
Keyword arguments:
new_car_pos -- A tuple containing the cars current position
latitude first, longitude second
car_speed -- A float containing the cars current speed
old_car_pos -- A tuple containing the cars previous position
latitude first, longitude second
new_ambu_pos -- A tuple containing the ambulance current position
latitude first, longitude second
ambu_speed -- A float containing the ambulances current speed
old_ambu_pos -- A tuple containing the ambulance previous position
latitude first, longitude second
'''
car_dir = self._find_direction(old_car_pos, new_car_pos)
ambu_dir = self._find_direction(old_ambu_pos, new_ambu_pos)
if ambu_speed <= 0:
return False
if car_dir != ambu_dir:
print('Car not going the same direction as ambu')
return False
if not self._ambu_behind(new_car_pos, new_ambu_pos, car_dir):
print('Ambulance not behind car')
return False
distance_km = Calculator.gps_to_kmeters(float(new_car_pos[1]),
float(new_car_pos[0]),
float(new_ambu_pos[1]),
float(new_ambu_pos[0]))
time_to_intersection = Calculator.time_to_intersection(
distance_km, ambu_speed, car_speed)
print('The vehicles are: ' + str(distance_km) +
' kms apart. Time to intersect: ' + str(time_to_intersection))
if time_to_intersection == 0:
return False
if time_to_intersection > 2:
print('Ambulance is too far behind: ' + str(time_to_intersection))
return False
return True
def _is_relevant(self, new_car_pos, car_speed, old_car_pos,
new_ambu_pos, ambu_speed, old_ambu_pos):
'''Takes in the car and the ambulances current and previous postition.
Returns whether the car should be notified or not, as a boolean
Keyword arguments:
new_car_pos -- A tuple containing the cars current position
latitude first, longitude second
car_speed -- A float containing the cars current speed
old_car_pos -- A tuple containing the cars previous position
latitude first, longitude second
new_ambu_pos -- A tuple containing the ambulance current position
latitude first, longitude second
ambu_speed -- A float containing the ambulances current speed
old_ambu_pos -- A tuple containing the ambulance previous position
latitude first, longitude second
'''
car_dir = self._find_direction(old_car_pos, new_car_pos)
ambu_dir = self._find_direction(old_ambu_pos, new_ambu_pos)
if ambu_speed <= 0:
return False
if car_dir != ambu_dir:
print('Car not going the same direction as ambu')
return False
if not self._ambu_behind(new_car_pos, new_ambu_pos, car_dir):
print ('Ambulance not behind car')
return False
distance_km = Calculator.gps_to_kmeters(float(new_car_pos[1]), float(new_car_pos[0]),
float(new_ambu_pos[1]), float(new_ambu_pos[0]))
time_to_intersection = Calculator.time_to_intersection(
distance_km, ambu_speed, car_speed)
print ('The vehicles are: ' + str(distance_km) +
' kms apart. Time to intersect: ' + str(time_to_intersection))
if time_to_intersection == 0:
return False
if time_to_intersection > 2:
print('Ambulance is too far behind: ' + str(time_to_intersection))
return False
return True
def pick_message(self, new_car, old_car, new_ambu, old_ambu):
'''Checks if the current data is relevant, and returns a integer
for each case
Keyword arguments:
new_car -- A tuple containing the cars current position
old_car -- A tuple containing the cars previous position
new_ambu -- A tuple containing the ambulance current position
old_ambu -- A tuple containing the ambulance previous position
returns
0 if the situation is not relevant
1 if the ambulance is less than 20 sec behind
2 if the ambulance is less than 2 minutes behind
3 if the ambulance just passed the car and is less than 50 meters ahead
'''
new_car_pos = (new_car['latitude'], new_car['longitude'])
new_car_time = new_car['timestamp']
old_car_pos = (old_car['latitude'], old_car['longitude'])
old_car_time = old_car['timestamp']
car_speed = Calculator.speed(new_car_pos[1], new_car_pos[0], old_car_pos[1], old_car_pos[0], (new_car_time - old_car_time))
print("Car time" + str(new_car_time-old_car_time))
print("Car speed: " + str(car_speed))
new_ambu_pos = (new_ambu['latitude'], new_ambu['longitude'])
new_ambu_time = new_car['timestamp']
old_ambu_pos = (old_ambu['latitude'], old_ambu['longitude'])
old_ambu_time = old_car['timestamp']
ambu_speed = Calculator.speed(new_ambu_pos[1], new_ambu_pos[0], old_ambu_pos[1], old_ambu_pos[0], (new_ambu_time - old_ambu_time ))
print("Ambu speed: " + str(ambu_speed))
car_dir = self._find_direction(new_car_pos, old_car_pos)
ambu_dir = self._find_direction(new_ambu_pos, old_ambu_pos)
distance_km = Calculator.gps_to_kmeters(new_car_pos[1], new_car_pos[0],
new_ambu_pos[1], new_ambu_pos[0])
print("Distance is : " + str(distance_km ))
if not self._is_relevant(new_car_pos, car_speed, old_car_pos,
new_ambu_pos, ambu_speed, old_ambu_pos):
#0.05km is 50 meters.
if distance_km < 0.05\
and car_dir.name == ambu_dir.name:
if not self.meter_message:
self.meter_message = True
self.minute_warning = False
self.second_warning = False
return 3
else:
return 0
return 0
time_to_intersection = Calculator.time_to_intersection(
distance_km, ambu_speed, car_speed)
print ('The vehicles are: ' + str(distance_km) +
' kms Appart. Time to intersect: ' + str(time_to_intersection))
#time to intersection is less than 20 sec, 1/3 of a minute
if time_to_intersection <= (1/3):
if not self.second_warning:
self.second_warning = True
return 1
return 0
if time_to_intersection <= 2:
if not self.minute_warning:
self.minute_warning = True
self.meter_message = False
return 2
return 0
def pick_message(self, new_car, old_car, new_ambu, old_ambu):
'''Checks if the current data is relevant, and returns a integer
for each case
Keyword arguments:
new_car -- A tuple containing the cars current position
old_car -- A tuple containing the cars previous position
new_ambu -- A tuple containing the ambulance current position
old_ambu -- A tuple containing the ambulance previous position
returns
0 if the situation is not relevant
1 if the ambulance is less than 20 sec behind
2 if the ambulance is less than 2 minutes behind
3 if the ambulance just passed the car and is less than 50 meters ahead
'''
new_car_pos = (new_car['latitude'], new_car['longitude'])
new_car_time = new_car['timestamp']
old_car_pos = (old_car['latitude'], old_car['longitude'])
old_car_time = old_car['timestamp']
car_speed = Calculator.speed(new_car_pos[1], new_car_pos[0],
old_car_pos[1], old_car_pos[0],
(new_car_time - old_car_time))
print("Car time" + str(new_car_time - old_car_time))
print("Car speed: " + str(car_speed))
new_ambu_pos = (new_ambu['latitude'], new_ambu['longitude'])
new_ambu_time = new_car['timestamp']
old_ambu_pos = (old_ambu['latitude'], old_ambu['longitude'])
old_ambu_time = old_car['timestamp']
ambu_speed = Calculator.speed(new_ambu_pos[1], new_ambu_pos[0],
old_ambu_pos[1], old_ambu_pos[0],
(new_ambu_time - old_ambu_time))
print("Ambu speed: " + str(ambu_speed))
car_dir = self._find_direction(new_car_pos, old_car_pos)
ambu_dir = self._find_direction(new_ambu_pos, old_ambu_pos)
distance_km = Calculator.gps_to_kmeters(new_car_pos[1], new_car_pos[0],
new_ambu_pos[1],
new_ambu_pos[0])
print("Distance is : " + str(distance_km))
if not self._is_relevant(new_car_pos, car_speed, old_car_pos,
new_ambu_pos, ambu_speed, old_ambu_pos):
#0.05km is 50 meters.
if distance_km < 0.05\
and car_dir.name == ambu_dir.name:
if not self.meter_message:
self.meter_message = True
self.minute_warning = False
self.second_warning = False
return 3
else:
return 0
return 0
time_to_intersection = Calculator.time_to_intersection(
distance_km, ambu_speed, car_speed)
print('The vehicles are: ' + str(distance_km) +
' kms Appart. Time to intersect: ' + str(time_to_intersection))
#time to intersection is less than 20 sec, 1/3 of a minute
if time_to_intersection <= (1 / 3):
if not self.second_warning:
self.second_warning = True
return 1
return 0
if time_to_intersection <= 2:
if not self.minute_warning:
self.minute_warning = True
self.meter_message = False
return 2
return 0
