def move_torpedo(self):
"""
moves the torpedo in the direction it was fire and update the game
score when we hit an asteroid
"""
if self._screen.is_space_pressed() and len(self.torpedo_lst) <= 15:
torpedo = Torpedo(self.ship)
torpedo.set_dx()
torpedo.set_dy()
self._screen.register_torpedo(torpedo)
self.torpedo_lst.append(torpedo)
dead_torpedo_lst = []
for i, torpedo in enumerate(self.torpedo_lst):
if torpedo.get_life() > 0:
self.move(torpedo)
self._screen.draw_torpedo(torpedo, torpedo.get_lx(),
torpedo.get_ly(),
torpedo.get_heading())
torpedo.life_update()
else:
dead_torpedo_lst.append(i)
for j, ast in enumerate(self.asteroid_lst):
if ast.has_intersection(torpedo):
self.score_update(ast.get_size())
self.torpedo_hit(ast, torpedo, i, j)
dead_torpedo_lst.append(i)
new_torpedo_list = []
for i in range(len(self.torpedo_lst)):
if i not in dead_torpedo_lst:
new_torpedo_list.append(self.torpedo_lst[i])
if i in dead_torpedo_lst:
self._screen.unregister_torpedo(self.torpedo_lst[i])
self.torpedo_lst = new_torpedo_list
def create_torpedo(self):
torp = Torpedo(self.__ship_dict["ship"].get_location(X),
self.__ship_dict["ship"].get_location(Y),
self.__ship_dict["ship"].get_speed(X),
self.__ship_dict["ship"].get_speed(Y),
self.__ship_dict["ship"].get_heading())
self.__screen.register_torpedo(torp)
self.__screen.draw_torpedo(torp, torp.get_location(X),
torp.get_location(Y), torp.get_heading())
self.__torpedo_dict[self.__torpedo_counter] = torp
def register_torpedo(self):
'''
:return: Generates objects with Class type Torpedo and draws them to the screen
'''
if self._screen.is_space_pressed() and len(self._torpedo_list) <= MAX_TORPEDOS:
temp_x_speed, temp_y_speed = self._ship.get_speed()
new_x_speed = temp_x_speed + ACC_FACTOR * math.cos(math.radians(self._ship.get_heading()))
new_y_speed = temp_y_speed + ACC_FACTOR * math.sin(math.radians(self._ship.get_heading()))
speed = new_x_speed, new_y_speed
temp_torpedo = Torpedo(self._ship.get_location(), speed, self._ship.get_heading(), TORPEDO_RADIUS)
if (id(temp_torpedo) not in TORPEDO_LIST_ID):
TORPEDO_LIST_ID.append(temp_torpedo)
self._screen.register_torpedo(temp_torpedo)
x, y = temp_torpedo.get_location()
self._screen.draw_torpedo(temp_torpedo, x, y, temp_torpedo.get_heading())
self._torpedo_list.append(temp_torpedo)
def _game_loop(self):
"""
Main game logic method
"""
ship_pos = self.ship.get_position()
self._screen.draw_ship(ship_pos[self.X], ship_pos[self.Y],
self.ship.get_heading())
ship_vel = self.ship.get_velocity()
# Rotate ship to the left
if self._screen.is_left_pressed():
self.ship.set_heading(self.ship.get_heading() + self.ROTATE_LEFT)
# Rotate ship to the right
if self._screen.is_right_pressed():
self.ship.set_heading(self.ship.get_heading() + self.ROTATE_RIGHT)
# Accelerate ship
if self._screen.is_up_pressed():
self.ship.accelerate()
# Fire torpedo
if self._screen.is_space_pressed():
if self.torpedo_count != self.MAX_TORPEDOS_AT_ONCE:
torpedo = Torpedo(ship_pos, ship_vel, self.ship.get_heading())
self._screen.register_torpedo(torpedo)
self.torpedo_lives.append(self.TORPEDO_LIFESPAN)
self.torpedo_count += 1
self.torpedos.append(torpedo)
# This section of code handles each asteroid objects parameter updates
for asteroid in self.asteroids:
ast_pos = asteroid.get_position()
self._screen.draw_asteroid(asteroid, ast_pos[self.X],
ast_pos[self.Y])
ast_vel = asteroid.get_velocity()
# From here till the end of the loop, the code handles
# intersections (if any) of the asteroid with the ship or with a
# torpedo
if asteroid.has_intersection(self.ship):
self._screen.remove_life()
self.ship_lives -= 1
self._screen.show_message(self.HIT_TITLE, self.HIT_MSG)
self.remove_asteroid(asteroid)
continue
ast_size = asteroid.get_size()
for torpedo in self.torpedos:
if asteroid.has_intersection(torpedo):
i = ast_size - 1 # Score option's index
self.score += self.SCORE_OPTIONS[i]
self._screen.set_score(self.score)
# Split the asteroid into 2 smaller ones
# Remove original asteroid
self.remove_asteroid(asteroid)
# Removes the torpedo after it hit the asteroid
self.remove_torpedo(self.torpedos.index(torpedo), torpedo)
if i == 0:
# Iteration can be terminated if the removed
# asteroid had the smallest size
break
# Calculate new velocity
nom = map(add, ast_vel, torpedo.get_velocity())
den = sqrt(ast_vel[self.X]**2 + ast_vel[self.Y]**2)
# Nominator / Denominator
n_vel = tuple(v / den for v in nom)
# Create new asteroids
self.add_asteroid(ast_pos, n_vel, i)
# Second asteroid with the opposing velocity
self.add_asteroid(ast_pos, tuple(v * -1 for v in n_vel), i)
# Move asteroid
asteroid.set_position(self.get_new_coords(ast_vel, ast_pos))
# This section of code updates torpedos parameters
for torpedo in self.torpedos:
t_pos = torpedo.get_position()
self._screen.draw_torpedo(torpedo, t_pos[self.X], t_pos[self.Y],
torpedo.get_heading())
# Move torpedo
torpedo.set_position(
self.get_new_coords(torpedo.get_velocity(), t_pos))
# Decrease lifespan of the torpedo
torp_index = self.torpedos.index(torpedo)
self.torpedo_lives[torp_index] -= 1
# Remove torpedo after its lifespan is depleted
if self.torpedo_lives[torp_index] == 0:
self.remove_torpedo(torp_index, torpedo)
# Exit game and show win message when all asteroids are destroyed
if not self.asteroids:
self.exit_game(self.WON_TITLE, self.WON_MSG)
# Exit game and show loss message when ship is out of lives
if self.ship_lives == 0:
self.exit_game(self.LOST_TITLE, self.LOST_MSG)
# Exit game on request
if self._screen.should_end():
self.exit_game(self.QUIT_TITLE, self.QUIT_MSG)
# Move ship
self.ship.set_position(self.get_new_coords(ship_vel, ship_pos))