bootdev_asteroids/main.py

import pygame
import sys

from asteroid import Asteroid
from asteroidfield import AsteroidField
from constants import *
from player import Player

def main():
    print("Starting Asteroids!")
    print(f"Screen width: {SCREEN_WIDTH}")
    print(f"Screen height: {SCREEN_HEIGHT}")

    pygame.init()

    if pygame.get_init() == False:
        pygame.quit()
        sys.exit(1)

    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))

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

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

    Asteroid.containers = (asteroids, updatable, drawable)
    AsteroidField.containers = (updatable)
    Player.containers = (updatable, drawable)

    player = Player(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2) 
    asteroidField = AsteroidField()

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

        pygame.Surface.fill(screen, (0,0,0))

        updatable.update(dt)

        for asteroid in asteroids:
            if asteroid.is_colliding(player):
                print("Game Over")
                sys.exit(0)

        for drawing in drawable:
            drawing.draw(screen)

        pygame.display.flip() #refresh screen

        dt = time.tick(60) / 1000 #conveted to ms

if __name__ == "__main__":
    main()