main.py

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

def main():
    print("Starting Asteroids!")
    print(f"Screen width: {SCREEN_WIDTH}")
    print(f"Screen height: {SCREEN_HEIGHT}")
    pygame.init()
    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
    x = int(SCREEN_WIDTH / 2)
    y = int(SCREEN_HEIGHT / 2)

    updatables = pygame.sprite.Group()
    drawables = pygame.sprite.Group()
    asteroids = pygame.sprite.Group()
    shots = pygame.sprite.Group()
    Player.containers = (updatables, drawables)
    Asteroid.containers = (updatables, drawables, asteroids)
    AsteroidField.containers = (updatables)
    Shot.containers = (updatables, drawables, shots)

    player = Player(x, y)
    asteroid_field = AsteroidField()

    clock = pygame.time.Clock()
    dt = 0


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

        updatables.update(dt)

        screen.fill("black")
        for drawable in drawables:
            drawable.draw(screen)
        for asteroid in asteroids:
            for shot in shots:
                if asteroid.collision(shot):
                    asteroid.split()
                    shot.kill()
        for asteroid in asteroids:
            if asteroid.collision(player):
                print("Game over!")
                sys.exit()
        pygame.display.flip()

        dt = clock.tick(60) / 1000 # convert milliseconds to seconds

if __name__ == "__main__":
    main()