class GameScene(Scene):
def __init__(self):
super(GameScene, self).__init__()
self.id = 2
self.sceneName = "game"
self.spawnFactor = 0
self.speedFactor = 0
self.resetEnemy = False
def initialize(self):
print(f"Initializing the '{self.sceneName}' level...")
# Loading resources (images, audio, etc.) before beginning scene
Player.image = load_image("player.gif")
Player.shootSound = load_sound("laser.ogg")
Laser.image = load_image("laser.gif")
Enemy.image = load_image("spider.gif")
self.background = load_image("background2.gif").convert()
# Initialize sprite group
self.lasers = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self.all = pygame.sprite.RenderUpdates()
# Assign groups to sprites
Laser.containers = self.lasers, self.all
Enemy.containers = self.aliens, self.all
Player.containers = self.all
Score.containers = self.all
Lives.containers = self.all
self.player = Player()
self.score = Score()
self.lives = Lives(self.player.lives)
self.all.add(self.score)
self.all.add(self.lives)
self.generate_enemies()
def handle_events(self, event):
keystate = pygame.key.get_pressed()
# Player using LEFT & RIGHT ARROWS to move
direction = keystate[pygame.K_RIGHT] - keystate[pygame.K_LEFT]
self.player.set_direction(direction)
# Player presses SPACE to shoot
self.player.firing = keystate[pygame.K_SPACE]
def render(self, screen):
screen.blit(self.background, (0, 0))
self.all.clear(screen, self.background)
self.all.update()
self.all.draw(screen)
def update(self):
if self.player.alive():
self.player.move()
# Prevent overfiring/spamming lasers over max limit
if not self.player.reloading and self.player.firing and len(
self.lasers) < const.MAX_SHOT:
Laser(self.player.gunpos())
Player.shootSound.play()
self.player.reloading = self.player.firing
else:
# Player has died (lost all lives)
self.go_to_gameover()
# Enemy (group) direction change check
for e1 in self.aliens:
# An enemy reaches the edge of the screen,
# then change all enemy's direction
if e1.changeDirection:
for e2 in self.aliens:
e2.go_down()
break
#===-------------------
# Collision detection
for alien in pygame.sprite.spritecollide(self.player, self.aliens, 1):
self.resetEnemy = True
self.player.died()
self.lives.set_lives(self.player.lives)
if self.player.lives <= 0:
self.player.kill()
break
for alien in pygame.sprite.groupcollide(self.lasers, self.aliens, 1,
1).keys():
self.score.increment()
#===-------------------
# Reset position of enemies
if self.resetEnemy:
self.resetEnemy = False
for e in self.aliens:
e.reset_position()
if len(self.aliens) == 0:
if self.speedFactor < const.MAX_SPEED_FACTOR:
self.speedFactor += 1
self.generate_enemies()
pygame.display.update()
def generate_enemies(self):
rows = random.randrange(2, 5)
cols = random.randrange(5, 11)
speed = random.randrange(const.MIN_E_SPEED + self.speedFactor,
const.MAX_E_SPEED + self.speedFactor)
facing = random.choice((-1, 1))
count = 0
offset_x = offset_y = 16
x_pos = y_pos = 0
for row in range(rows):
for col in range(cols):
count = count + 1
e = Enemy(count, speed, facing)
e.set_position(x_pos, y_pos)
x_pos = 32 + x_pos + offset_x
x_pos = 0
y_pos = 32 + y_pos + offset_y
def go_to_gameover(self):
ApplicationManager().load_scene(GameOverScene(self.score.get_score()))
