main.py

import sys
import pygame
from constants import *
from player import Player
from asteroid import Asteroid
from asteroidfield import AsteroidField
from shot import Shot

def main():
    pygame.init() 
    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
    clock = pygame.time.Clock()
    dt = 0

    updatable = pygame.sprite.Group()
    drawable = pygame.sprite.Group()

    Player.containers = (updatable, drawable)
    player = Player(SCREEN_WIDTH/2,SCREEN_HEIGHT/2)

    asteroids = pygame.sprite.Group()
    Asteroid.containers = (asteroids, updatable, drawable)

    AsteroidField.containers = updatable
    asteroid_field = AsteroidField()

    shots = pygame.sprite.Group()
    Shot.containers = (shots, updatable, drawable)

    # Game Loop
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                return
        

        for updatable_item in updatable:
            updatable_item.update(dt)

        for asteroid in asteroids:
            if asteroid.collides_with(player):
                print("Game Over!")
                sys.exit()

            for shot in shots:
                if asteroid.collides_with(shot):
                    shot.kill()
                    asteroid.kill()
        
        screen.fill("black")
        
        for drawable_item in drawable:
            drawable_item.draw(screen)

        pygame.display.flip()

        time_passed = clock.tick(60)
        dt = time_passed / 1000



if __name__ == "__main__":
    main()