class BouncingBall:
"""Overall class to manage game assets and behavior."""
def __init__(self):
"""Initialize the game, and create game resources."""
pygame.init()
# Clock set-up for framerate
self.clock = pygame.time.Clock()
self.settings = Settings()
self.stats = GameStats(self)
self.screen = pygame.display.set_mode((self.settings.screen_width,
self.settings.screen_height))
self.settings.screen_width = self.screen.get_rect().width
self.settings.screen_height = self.screen.get_rect().height
pygame.display.set_caption("Bouncing Ball")
self.bar = Bar(self)
self.ball = Ball(self)
self.timebar = TimeBar(self)
self.play_button = Button(self, 'Play')
def run_game(self):
"""Main game loop."""
while True:
self._check_events()
if self.stats.game_active:
self._ball_checks()
self.ball.update()
self.bar.update() # implements movement depending on movement flag
self.timebar.update(self)
self._time_check(self.start)
self._update_screen()
def _check_events(self):
"""Respond to keypresses and mouse events."""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
# Pressing arrow keys for movement:
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
# Releasing arrow keys:
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
elif event.type == pygame.MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
self._check_play_button(mouse_pos)
def _check_keydown_events(self, event):
"""Checks keydown events."""
if event.key == pygame.K_RIGHT:
self.bar.moving_right = True
elif event.key == pygame.K_LEFT:
self.bar.moving_left = True
elif event.key == pygame.K_ESCAPE:
sys.exit()
def _check_play_button(self, mouse_pos):
"""Restart game when Play button is clicked."""
button_clicked = self.play_button.rect.collidepoint(mouse_pos)
if button_clicked:
self._click_play()
def _click_play(self):
pygame.mouse.set_visible(False)
self.stats.reset_stats()
self.settings.initialize_settings()
self.bar.center_bar()
self.ball._init_old_pos()
self.stats.game_active = True
self.start = perf_counter()
def _check_keyup_events(self, event):
"""Checks keyup events."""
if event.key == pygame.K_RIGHT:
self.bar.moving_right = False
elif event.key == pygame.K_LEFT:
self.bar.moving_left = False
def _ball_checks(self):
self._check_ball_bar_collision()
self._check_ball_lost()
def _check_ball_bar_collision(self):
if pygame.sprite.collide_rect(self.ball, self.bar):
print('Bounce!')
self.ball.bounce = True
def _check_ball_lost(self):
"""Reset game if ball drops below bottom edge"""
if self.ball.rect.top >= self.settings.screen_height:
self._restart_game()
def _time_check(self, start):
"""Increase game difficulty if session duration has elapsed."""
if perf_counter() - start >= self.settings.session_duration:
self.start = perf_counter()
self.settings.increase_game_difficulty()
def _restart_game(self):
"""Take action if ball is lost"""
if self.stats.ball_left > 0:
self.ball._init_old_pos()
self.stats.ball_left -= 1
sleep(0.5)
else:
pygame.mouse.set_visible(True)
self.stats.game_active = False
def _update_screen(self):
"""Update images on the screen, and flip to the new screen."""
self.screen.fill(self.settings.bg_color)
self.bar.draw_bar()
self.timebar.draw_timebar()
self.ball.draw_ball()
if not self.stats.game_active:
self.play_button.draw_button()
pygame.display.flip()
self.clock.tick(150)
class AlienInvasion:
def __init__(self):
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
self.settings.screen_width = self.screen.get_rect().width
self.settings.screen_height = self.screen.get_rect().height
pygame.display.set_caption("Alien Invasion")
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self.stats = GameStats(self)
self._create_fleet()
self.play_button = Button(self, "Play Now")
def run_game(self):
while True:
self._check_events()
if self.stats.game_active:
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
def _check_events(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
elif event.type == pygame.MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
self._check_play_button(mouse_pos)
def _check_play_button(self, mouse_pos):
button_clicked = self.play_button.rect.collidepoint(mouse_pos)
if button_clicked and not self.stats.game_active:
self.stats.reset_stats()
self.settings.initialize_dynamic_settings()
self.stats.game_active = True
self.aliens.empty()
self.bullets.empty()
self._create_fleet()
self.ship.center_ship()
pygame.mouse.set_visible(False)
def _check_keydown_events(self, event):
if event.key == pygame.K_d:
self.ship.moving_right = True
elif event.key == pygame.K_a:
self.ship.moving_left = True
elif event.key == pygame.K_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
if event.key == pygame.K_d:
self.ship.moving_right = False
elif event.key == pygame.K_a:
self.ship.moving_left = False
def _fire_bullet(self):
if len(self.bullets) < self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
# Update bullet positions.
self.bullets.update()
# Get rid of bullets that have disappeared.
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
self.check_alien_collisions()
def check_alien_collisions(self):
collisions = pygame.sprite.groupcollide(self.bullets, self.aliens,
True, True)
if not self.aliens:
self.bullets.empty()
self._create_fleet()
self.settings.increase_speed()
def _update_screen(self):
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
if not self.stats.game_active:
self.play_button.draw_button()
pygame.display.flip()
def _update_aliens(self):
self._check_fleet_edges()
self.aliens.update()
if pygame.sprite.spritecollideany(self.ship, self.aliens):
self.ship_hit()
self._check_aliens_bottom()
def _create_fleet(self):
alien = Alien(self)
alien_width, alien_height = alien.rect.size
available_space_x = self.settings.screen_width - (2 * alien_width)
number_aliens_x = available_space_x // (2 * alien_width)
ship_height = self.ship.rect.height
available_space_y = (self.settings.screen_height - (3 * alien_height) -
ship_height)
rows = available_space_y // (2 * alien_height)
for rowN in range(rows):
for number in range(number_aliens_x):
self._create_alien(number, rowN)
def _create_alien(self, number, rowN):
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2 * alien_width * number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * rowN
self.aliens.add(alien)
def _check_fleet_edges(self):
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *= -1
def ship_hit(self):
if self.stats.ships_left > 0:
self.stats.ships_left -= 1
self.aliens.empty()
self.bullets.empty()
self._create_fleet()
self.ship.center_ship()
sleep(0.5)
else:
self.stats.game_active = False
pygame.mouse.set_visible(True)
def _check_aliens_bottom(self):
screen_rect = self.screen.get_rect()
for alien in self.aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
self._ship_hit()
break