class AlienInvasion:
"""Alien Game"""
def __init__(self):
""""Initialize game and settings"""
pygame.init()
self.settings = Settings()
#self.screen = pygame.display.set_mode((self.settings.screen_width,self.settings.screen_height))
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.stats = GameStats(self)
self.sb = Scoreboard(self)
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._create_fleet()
self.play_button = Button(self,"Play!!!")
def run_game(self):
"""begin the game"""
while True:
self.CheckEvents()
if self.stats.game_active == True:
self.ship.Update()
self._update_bullets()
self._update_aliens()
self.UpdateScreen()
def _check_play_button(self, mouse_pos):
"""start a new game if play is clicked"""
if self.play_button.rect.collidepoint(mouse_pos) and self.stats.game_active == False:
self.settings.initialize_dynamic_settings()
self.stats.reset_stats()
self.stats.game_active = True
self.sb.prep_score()
self.sb.prep_level()
self.sb.prep_level()
self.sb.prep_ships()
#clear any remaining aliens or bullets and create brand new one
self.aliens.empty()
self.bullets.empty()
self._create_fleet()
self.ship.center_ship()
#hide mouse
pygame.mouse.set_visible(False)
def CheckEvents(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_keydown_events(self, event):
if event.key == pygame.K_RIGHT:
# move the ship to the right
self.ship.moving_right = True
if event.key == pygame.K_LEFT:
# move the ship to the right
self.ship.moving_left = True
if event.key == pygame.K_UP:
# move the ship to the right
self.ship.moving_up = True
if event.key == pygame.K_DOWN:
# move the ship to the right
self.ship.moving_down = True
if event.key == pygame.K_SPACE:
if len(self.bullets) < self.settings.bullets_allowed:
self._fire_bullet()
if event.key == pygame.K_q:
sys.exit()
def _check_keyup_events(self, event):
"""key release events"""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
if event.key == pygame.K_LEFT:
self.ship.moving_left = False
if event.key == pygame.K_UP:
self.ship.moving_up = False
if event.key == pygame.K_DOWN:
self.ship.moving_down = False
def _fire_bullet(self):
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
self.bullets.update() # draw bullets at new positions
#delete bullets that are above the screen
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
self._check_bullet_alien_collisions()
def _check_bullet_alien_collisions(self):
#check for collissions with alien
#all objects that have collided are deleted. for high powered bullet set the first bool to true
collisions = pygame.sprite.groupcollide(self.bullets,self.aliens,True,True)
if collisions:
# each dictionary value contains a list of all aliens hit by 1 bullet.
for aliens in collisions.values():
self.stats.score += self.settings.alien_points * len(aliens)
self.sb.prep_score()
self.sb.check_high_score()
if not self.aliens:
self.bullets.empty()
self._create_fleet()
self.settings.increase_speed()
#increase level
self.stats.level += 1
self.sb.prep_level()
def _update_aliens(self):
"""Check if fleet is on an edge and then if necessary update all alien positions"""
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):
"""create the fleet of aliens"""
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)
#determine number of rows for screen
ship_height = self.ship.rect.height
available_space_y = self.settings.screen_height - 3 * alien_height - ship_height
number_rows = available_space_y // (2 * alien_height)
#add row of aliens
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
self._create_alien(alien_number, row_number)
def _create_alien(self,alien_number,row_number):
alien = Alien(self)
alien_width,alien_height = alien.rect.size
alien.x = alien_width + 2 * alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
def _check_fleet_edges(self):
"""respond appropriately if an alien has reached the edge"""
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
"""drop whole fleet and change direction"""
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *=-1
def _ship_hit(self):
"""respond to ship being hit by alien"""
if self.stats.ships_left > 0:
self.stats.ships_left -= 1
self.sb.prep_ships()
#erase all aliens and bullets
self.aliens.empty()
self.bullets.empty()
self._create_fleet()
self.ship.center_ship()
# chill out for a second
sleep(1.5)
else:
self.stats.game_active = False
pygame.mouse.set_visible(True)
def _check_aliens_bottom(self):
"""look and respond if any aliens are at the bottom of the screen"""
screen_rect = self.screen.get_rect()
for alien in self.aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
#Same functionality as when the ship is hit
self._ship_hit()
def UpdateScreen(self):
self.screen.fill(self.settings.bg_color) #background color to gray
self.ship.DrawShip() # draw ship
for bullet in self.bullets.sprites(): # draw bullets
bullet.draw_bullet()
self.aliens.draw(self.screen) #draw aliens
self.sb.show_score()
if not self.stats.game_active:
self.play_button.draw_button()
pygame.display.flip()
class AlienInvasion:
""""Overall class to manage game assets and behavior."""
def __init__(self):
""""Initialize the game and create game resources"""
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode(
(self.settings.screen_height, self.settings.screen_width))
# full screen 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")
# Create an instance to store game statistics.
self.stats = GameStats(self)
self.sb = Scoreboard(self)
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._create_fleet()
self.play_button = Button(self, "Play")
def run_game(self):
""""Start the main loop for the game"""
while True:
self._check_events()
if self.stats.game_active:
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
# Get rid of bullets that have gone off screen
def _check_events(self):
"""Respond to keypress and mouse events"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
self._check_play_button(mouse_pos)
elif event.type == pygame.KEYDOWN:
self._check_keydown_events(event)
elif event.type == pygame.KEYUP:
self._check_keyup_events(event)
def _check_play_button(self, mouse_pos):
""""Start a new game when player clicks play"""
button_clicked = self.play_button.rect.collidepoint(mouse_pos)
if button_clicked and not self.stats.game_active:
# Reset the game stats
self.settings.initialize_dynamic_settings()
self.stats.reset_stats()
self.stats.game_active = True
self.sb.prep_score()
self.sb.prep_level()
self.sb.prep_ships()
# Get rid of any remaining game assets
self.aliens.empty()
self.bullets.empty()
# Create new fleet and center ship
self._create_fleet()
self.ship.center_ship()
# Hide mouse cursor
pygame.mouse.set_visible(False)
def _check_keydown_events(self, event):
"""Respond to keypresses. """
if event.key == pygame.K_RIGHT:
self.ship.moving_right = True
elif event.key == pygame.K_LEFT:
self.ship.moving_left = True
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
elif event.key == pygame.K_LEFT:
self.ship.moving_left = False
elif event.key == pygame.K_q:
sys.exit()
def _fire_bullet(self):
"""Create a new bullet and add it to the bullets group."""
if len(self.bullets) < self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _create_fleet(self):
"""Create a fleet of Aliens"""
# create an alien and find the number of aliens in a row
# spacing between the aliens is equal to one alien width
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)
# determine number of rows of aliens that fit on screen
ship_height = self.ship.rect.height
available_space_y = (self.settings.screen_height - (3 * alien_height) -
ship_height)
number_rows = available_space_y // (2 * alien_height)
# create fleet of aliens
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
self._create_alien(alien_number, row_number)
def _create_alien(self, alien_number, row_number):
"""create an alien and place it in row """
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2 * (alien_width * alien_number)
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
def _check_fleet_edges(self):
"""Respond appropriately if any aliens have reached an edge"""
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
"""Drop the entire fleet and change the fleet's direction"""
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *= -1
def _update_screen(self):
"""Updates images on the screen, and flips to new screen"""
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
self.sb.show_score()
# Draw play button if game is inactive
if not self.stats.game_active:
self.play_button.draw_button()
pygame.display.flip()
def _update_bullets(self):
"""Update position of bullets and gets rid of old bullets"""
# Update bullet positions
self.bullets.update()
# Get rid of bullets that have gone off screen
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
# print(f" bullets generated : {len(self.bullets)}")
self._check_bullet_alien_collision()
def _check_bullet_alien_collision(self):
# Check for bullet alien collisions
collisions = pygame.sprite.groupcollide(self.bullets, self.aliens,
True, True)
# check if all aliens in fleet destroyed
if collisions:
for aliens in collisions.values():
self.stats.score += self.settings.alien_points * len(aliens)
self.sb.prep_score()
self.sb.prep_high_score()
if not self.aliens:
# Destroy existing bullets and create new fleet
self.bullets.empty()
self._create_fleet()
self.settings.increase_speed()
# Increase level.
self.stats.level += 1
self.sb.prep_level()
def _update_aliens(self):
""" Check if the fleet is at an edge,
Update the positions of all aliens in the fleet
"""
self._check_fleet_edges()
self.aliens.update()
# Look for alien ship collisions
if pygame.sprite.spritecollideany(self.ship, self.aliens):
self._ship_hit()
# Look for aliens hitting the bottom of the screen
self._check_aliens_bottom()
def _ship_hit(self):
"""Respond to ship being hit by an alien """
if self.stats.ships_left > 0:
# Decrement ships left and update scoreboard
self.stats.ships_left -= 1
self.sb.prep_ships()
# Get rid of any remaining aliens and bullets
self.aliens.empty()
self.bullets.empty()
# Create a new fleet and center the ship
self._create_fleet()
self.ship.center_ship()
# Pause
sleep(0.5)
else:
self.stats.game_active = False
pygame.mouse.set_visible(True)
def _check_aliens_bottom(self):
"""Check if any aliens have reached the bottom of the screen"""
screen_rect = self.screen.get_rect()
for alien in self.aliens.sprites():
if alien.rect.bottom >= screen_rect.bottom:
# Treat this the same as if the got hit.
self._ship_hit()
break