Exemplo de Pygame - pré aula

jogo_sem_classes.py

import pygame
from random import randint, choice

WIDTH = 640
HEIGHT = 480

def inicializa():
    pygame.init()
    w = pygame.display.set_mode((640, 480))
    pygame.key.set_repeat(50)

    assets = {
        'player': pygame.image.load('player.png'),
        'meteoro': pygame.image.load('meteorSmall.png'),
    }
    #44X42
    state = {
        'nave_x':640/2 - (99/2),
        'nave_y': 480 - 75,
        'last_updated': 0,
        'meteors': [ (randint(0, WIDTH-44), -100, choice(range(100, 300, 50))),
                     (randint(0, WIDTH-44), -130, choice(range(100, 300, 50))),
                     (randint(0, WIDTH-44), -160, choice(range(100, 300, 50))),
                     (randint(0, WIDTH-44), -190, choice(range(100, 300, 50))),
                     (randint(0, WIDTH-44), -210, choice(range(100, 300, 50))),
                    ],

    }


    return w, assets, state



def finaliza():
    pygame.quit()


def desenha(window: pygame.Surface, assets, state):
    window.fill((0,0,0))
    window.blit(assets['player'], (state['nave_x'], state['nave_y']))
    for meteor in state['meteors']:
        x, y, speed = meteor
        window.blit(assets['meteoro'], (x, y))


    pygame.display.update()

def atualiza_posicao_meteoros(state, delta_t):
    for index in range(len(state['meteors'])):
        x, y, speed = state['meteors'][index]
        y = y + speed * (delta_t/1000)
        if y > HEIGHT:
            x = (randint(0, WIDTH-44))
            y = -100
        state['meteors'][index] = (x, y, speed)

        


def recebe_eventos(state):
    now = pygame.time.get_ticks()
    delta_t = now - state["last_updated"]

    for ev in pygame.event.get():
        if ev.type == pygame.QUIT:
            return False
        elif ev.type == pygame.KEYDOWN:
            if ev.key == pygame.K_LEFT:
                state['nave_x']-=8
            elif ev.key == pygame.K_RIGHT:
                state['nave_x']+=8
    
    state['last_updated'] = now
    atualiza_posicao_meteoros(state, delta_t)

    return True

def gameloop(window, assets, state):
    while recebe_eventos(state):
        desenha(window, assets, state)


if __name__ == '__main__':
    window, assets, state = inicializa()
    gameloop(window, assets, state)
    finaliza()