import pygame
import random
# Initialize Pygame
pygame.init()
# Screen dimensions
WIDTH, HEIGHT = 800, 600
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Space Invaders")
# Colors
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
# Load images
player_image = pygame.image.load("player.png").convert_alpha()
alien_image = pygame.image.load("alien.png").convert_alpha()
bullet_image = pygame.image.load("bullet.png").convert_alpha()
# Player class
class Player:
def __init__(self):
self.image = player_image
self.rect = self.image.get_rect(center=(WIDTH // 2, HEIGHT - 50))
self.speed = 5
def move(self, dx):
self.rect.x += dx * self.speed
self.rect.x = max(0, min(WIDTH - self.rect.width, self.rect.x))
def draw(self, surface):
surface.blit(self.image, self.rect.topleft)
# Alien class
class Alien:
def __init__(self, x, y):
self.image = alien_image
self.rect = self.image.get_rect(topleft=(x, y))
self.speed = 1
def move(self):
self.rect.y += self.speed
def draw(self, surface):
surface.blit(self.image, self.rect.topleft)
# Bullet class
class Bullet:
def __init__(self, x, y):
self.image = bullet_image
self.rect = self.image.get_rect(center=(x, y))
self.speed = -10
def move(self):
self.rect.y += self.speed
def draw(self, surface):
surface.blit(self.image, self.rect.topleft)
# Main game function
def main():
clock = pygame.time.Clock()
player = Player()
aliens = [] # Start with an empty list of aliens
bullets = []
score = 0
# Timer for alien generation
alien_spawn_time = 1000 # milliseconds
last_spawn_time = pygame.time.get_ticks()
game_over = False # Track game state
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
return
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT]:
player.move(-1)
if keys[pygame.K_RIGHT]:
player.move(1)
if keys[pygame.K_SPACE]:
if len(bullets) < 5: # Limit the number of bullets on screen
bullets.append(Bullet(player.rect.centerx, player.rect.top))
# Update bullets
for bullet in bullets[:]:
bullet.move()
if bullet.rect.bottom < 0:
bullets.remove(bullet)
# Spawn new aliens at intervals
current_time = pygame.time.get_ticks()
if current_time - last_spawn_time > alien_spawn_time and not game_over:
# Randomly place a new alien at the top
new_alien_x = random.randint(50, WIDTH - 50)
aliens.append(Alien(new_alien_x, 0))
last_spawn_time = current_time
# Update aliens
for alien in aliens[:]:
alien.move()
if alien.rect.top > HEIGHT:
game_over = True # Game over if an alien reaches the bottom
# Check for collisions
for bullet in bullets[:]:
for alien in aliens[:]:
if bullet.rect.colliderect(alien.rect):
bullets.remove(bullet)
aliens.remove(alien)
score += 1
break
# Draw everything
screen.fill(BLACK)
player.draw(screen)
for alien in aliens:
alien.draw(screen)
for bullet in bullets:
bullet.draw(screen)
# Display score
font = pygame.font.Font(None, 36)
score_text = font.render(f'Score: {score}', True, WHITE)
screen.blit(score_text, (10, 10))
# Display game over message
if game_over:
game_over_text = font.render('Game Over', True, WHITE)
screen.blit(game_over_text, (WIDTH // 2 - game_over_text.get_width() // 2, HEIGHT // 2 - 20))
final_score_text = font.render(f'Final Score: {score}', True, WHITE)
screen.blit(final_score_text, (WIDTH // 2 - final_score_text.get_width() // 2, HEIGHT // 2 + 10))
pygame.display.flip()
clock.tick(60)
pygame.quit()
if __name__ == "__main__":
main()
