main.py

# this allows us to use code from
# the open-source pygame library
# throughout this file
# import the function_hello function
# and the variable_player variable
# into the current file
# from module import function_hello, variable_player
# import everything from a module
# into the current file
# from module import *
# 1 Event Handling: Process all input events at the start of the loop.
# 2 Game Logic Updates: Process your game state changes next.
# 3 Screen Clearing: Use screen.fill((0, 0, 0)) early in the drawing phase to ensure a clean background for your new frame.
# 4 Drawing Operations: Render all necessary game objects, text, and other visuals after clearing.
# 5 Display Update: Finally, call pygame.display.update() to swap the newly prepared frame with the on-screen buffer, showing all updates to the player.
import pygame
import sys
from constants import *
from player import Player
from asteroid import *
from asteroidfield import *
from shot import *

def main():
    pygame.init()
    #create groups
    updatable = pygame.sprite.Group()
    drawable = pygame.sprite.Group()
    asteroids = pygame.sprite.Group()
    shots = pygame.sprite.Group()
    clock = pygame.time.Clock()
    dt = 0
    print("Starting asteroids!")
    print(f"Screen width: {SCREEN_WIDTH}")
    print(f"Screen height: {SCREEN_HEIGHT}")
    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
    # Create player in middle of screen
    Player.containers = (updatable, drawable)
    AsteroidField.containers = (updatable,)
    Asteroid.containers = (asteroids, updatable, drawable)
    Shot.containers = (shots, updatable, drawable)
    player = Player(SCREEN_WIDTH/2, SCREEN_HEIGHT/2)
    asteroid_field = AsteroidField()
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                return
    
        # 1. Update all objects in the 'updatable' group.
        for sprite in updatable:
            sprite.update(dt)  # Assuming 'dt' (delta time) is being passed if necessary
        for asteroid in asteroids:  # asteroids is your sprite group
            if player.collision(asteroid):
                print("Game over!")
                sys.exit()
            for shot in shots:
                if shot.collision(asteroid):
                    asteroid.split() 
                    shot.kill() 

        # 2. Clear the screen (fill with a background color, e.g., black)
        screen.fill((0, 0, 0))

        # 3. Draw all objects in the 'drawable' group.
        for sprite in drawable:
            sprite.draw(screen)

        # 4. Refresh the display.
        pygame.display.flip()
        dt = clock.tick(60)/1000

if __name__ == "__main__":
    main()