class Engine:
"""
Class to initialize, display and run game.
"""
def __init__(self, config_file=None):
"""
Method to initialize the Engine class.
"""
pygame.init()
self.running = True
self.icon = pygame.image.load("assets/icon.png")
self.background = pygame.image.load("assets/background.png")
self.score_value = 0
self.screen_text = pygame.font.Font('freesansbold.ttf', 32)
self.screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Space Invaders")
pygame.display.set_icon(self.icon)
self.player = Player()
self.enemy_fleet = EnemyFleet(16)
self.enemy_fleet.create_fleet()
self.game_physics = Physics()
def display(self):
"""
Method to display everythinh on the screen.
"""
self.screen.fill((0, 0, 0))
self.screen.blit(self.background, (0, 0))
for enemy in self.enemy_fleet.enemy_register:
self.screen.blit(enemy.image, tuple(enemy.position))
self.screen.blit(self.player.image, tuple(self.player.position))
for bullet in self.player.bullets:
self.screen.blit(bullet.image, tuple(bullet.position))
score = self.screen_text.render("Score : {}".format(self.score_value),
True, (255, 0, 0))
self.screen.blit(score, (10, 10))
def update(self):
"""
Method to update game states.
"""
self.player.update()
self.player.position, _ = self.game_physics.hitting_walls(
self.player.position.copy())
updated_bullet_list = []
for enemy in self.enemy_fleet.enemy_register:
isHit = self.game_physics.enemy_collision(
enemy.position.copy(), self.player.position.copy())
if isHit:
self.running = False
return
for enemy in self.enemy_fleet.enemy_register:
for bullet in self.player.bullets:
isHit = self.game_physics.bullet_collision(
enemy.position.copy(), bullet.position.copy())
if isHit:
enemy.respawn()
self.score_value += 1
break
for bullet in self.player.bullets:
_, isHit = self.game_physics.hitting_walls(bullet.position.copy())
if not isHit:
bullet.update()
updated_bullet_list.append(bullet)
self.player.bullets = updated_bullet_list
for enemy in self.enemy_fleet.enemy_register:
enemy.update()
enemy.position, isHit = self.game_physics.hitting_walls(
enemy.position.copy())
if isHit:
enemy.velocity[0] *= -1
enemy.move(1, axis=1)
else:
enemy.move(0, axis=1)
def event_handler(self):
"""
Method to handle events.
"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_q:
self.running = False
elif event.key == pygame.K_ESCAPE:
self.running = False
elif event.key == pygame.K_LEFT:
self.player.move(-1)
elif event.key == pygame.K_RIGHT:
self.player.move(1)
elif event.key == pygame.K_SPACE:
self.player.fire()
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
self.player.move(0)
elif event.key == pygame.K_RIGHT:
self.player.move(0)
def run(self):
"""
Method to run the game engine.
"""
while self.running:
self.event_handler()
self.update()
self.display()
pygame.display.update()
